AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON APRIL 20, 1998
                                                      REGISTRATION NO. 333-
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                           --------------------------
 
                                    FORM S-4
 
                             REGISTRATION STATEMENT
 
                                     UNDER
 
                           THE SECURITIES ACT OF 1933
                           --------------------------
 
                              99CENTS ONLY STORES
 
             (Exact Name of Registrant as Specified in Its Charter)
 

                                                          
          CALIFORNIA                         5331                  95-2411605
 (State or Other Jurisdiction    (Primary Standard Industrial   (I.R.S. Employer
              of                   Classification Code No.)      Identification
Incorporation or Organization)                                        No.)

 
                              99CENTS ONLY STORES
 
                           4000 UNION PACIFIC AVENUE
 
                       CITY OF COMMERCE, CALIFORNIA 90023
 
                                 (213) 980-8145
 
  (Address, Including Zip Code, and Telephone Number, Including Area Code, of
                   Registrant's Principal Executive Offices)
 
         DAVID GOLD, CHAIRMAN OF THE BOARD AND CHIEF EXECUTIVE OFFICER
 
                              99CENTS ONLY STORES
 
                           4000 UNION PACIFIC AVENUE
 
                       CITY OF COMMERCE, CALIFORNIA 90023
 
                                 (213) 980-8145
 
 (Name, Address, Including Zip Code, and Telephone Number, Including Area Code,
                             of Agent for Service)
                           --------------------------
 
                                   COPIES TO:
 
                        C.N. FRANKLIN REDDICK III, ESQ.
 
                         LINDA GIUNTA MICHAELSON, ESQ.
 
                     Troop Meisinger Steuber & Pasich, LLP
 
                            10940 Wilshire Boulevard
 
                         Los Angeles, California 90024
 
                                 (310) 824-7000
                           --------------------------
 
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
AS SOON AS PRACTICABLE AFTER THIS REGISTRATION STATEMENT IS DECLARED EFFECTIVE.
                           --------------------------
 
    If the securities being registered on this form are being offered in
connection with the formation of a holding company and there is compliance with
General Instruction G, check the following box. / /
 
    If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. / /
 
    If this form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. / /
                           --------------------------
 
                        CALCULATION OF REGISTRATION FEE
 


                                                                   PROPOSED MAXIMUM    PROPOSED MAXIMUM
           TITLE OF EACH CLASS OF                 AMOUNT TO         OFFERING PRICE        AGGREGATE           AMOUNT OF
        SECURITIES TO BE REGISTERED            BE REGISTERED(1)      PER SHARE(2)     OFFERING PRICE(2)    REGISTRATION FEE
                                                                                              
Common Stock................................       374,271          Not Applicable       $12,631,629            $3,726

 
(1) Represents the maximum number of shares of 99 CENTS Only Stores issuable in
    the Exchange Offer, based upon the number of shares of Universal common
    stock (on a fully diluted basis) reported outstanding as of March 17, 1998
    (other than shares owned by 99 CENTS Only Stores).
 
(2) Estimated solely for the purposes of determining the registration fee in
    accordance with Rule 457(f)(1). The proposed maximum offering price is based
    on the average of the high and low prices of the common stock of Universal
    International, Inc. on April 14, 1998 on the Nasdaq National Market. The
    proposed maximum aggregate offering price is based on the product of
    $2.109375 (the average of the high and low prices of Universal common stock
    on April 14, 1998) and 5,988,328 (the maximum number of shares (on a fully
    diluted basis) expected to be issued in connection with the transaction
    described herein).
                           --------------------------
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
 
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                           PROXY STATEMENT/PROSPECTUS
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.

                OFFER FOR ALL OUTSTANDING SHARES OF COMMON STOCK
            (INCLUDING THE ASSOCIATED COMMON SHARE PURCHASE RIGHTS)
                                       OF
                         UNIVERSAL INTERNATIONAL, INC.
                                ON THE BASIS OF
                ONE SHARE OF COMMON STOCK OF 99CENTS ONLY STORES
      FOR EACH 16 SHARES OF COMMON STOCK OF UNIVERSAL INTERNATIONAL, INC.
                                       BY
                              99CENTS ONLY STORES
                            ------------------------
 
    99CENTS Only Stores, a California corporation, through a wholly-owned
subsidiary ("99CENTS Only Stores" or the "Company"), hereby offers, upon the
terms and subject to the conditions set forth herein and in the related Letter
of Transmittal (collectively, the "Exchange Offer"), to exchange one share of
common stock, no par value per share (the "99CENTS Only Stores Common Stock"),
for each sixteen (16) shares of common stock, $0.05 par value per share (the
"Universal Common Stock"), of Universal International, Inc., a Minnesota
corporation ("Universal"), including the associated common share purchase rights
(each, a "Right" and collectively, the "Rights") issued pursuant to the Rights
Agreement, dated as of April 19, 1996 between Universal and Norwest Bank
Minnesota, National Association, as Rights Agent (the "Rights Agreement").
Unless the contract otherwise requires and unless and until all Rights are
redeemed, all references to Universal Common Stock or Universal Shares shall
include the associated Rights. The Exchange Offer is subject to certain
conditions as set forth under "THE EXCHANGE OFFER--Certain Conditions of the
Exchange Offer", including the conditions that on or prior to the date on which
the Exchange Offer expires (i) not less than 32% of the outstanding shares of
Universal Common Stock (other than shares owned by 99CENTS Only Stores) are
validly tendered and not withdrawn in the Exchange Offer and (ii) Universal
shareholders have approved the granting of voting rights to the shares of
Universal Common Stock acquired by 99CENTS Only Stores in the Exchange Offer
("99CENTS Only Stores Voting Rights"). The approval of voting rights requires
both (i) the affirmative vote of the holders of a majority of all outstanding
Universal Shares entitled to vote, and (ii) the affirmative vote of the holders
of a majority of all Universal Shares entitled to vote, excluding shares of
Universal held by 99CENTS Only Stores, any officer of Universal and any employee
of Universal who is also a director of Universal. The 99CENTS Only Stores Common
Stock is traded on the New York Stock Exchange under the symbol "NDN." The last
reported sales price of the 99CENTS Only Stores Common Stock on April 17, 1998
on the New York Stock Exchange was $39.31.
 
    SEE "RISK FACTORS" COMMENCING ON PAGE 13 OF THIS PROXY STATEMENT/PROSPECTUS
FOR A DISCUSSION OF CERTAIN FACTORS THAT SHOULD BE CAREFULLY CONSIDERED BY
HOLDERS OF UNIVERSAL COMMON STOCK PRIOR TO TENDERING THEIR UNIVERSAL COMMON
STOCK PURSUANT TO THE EXCHANGE OFFER.
 
    This Proxy Statement/Prospectus constitutes (i) the Prospectus of 99CENTS
Only Stores with respect to the securities to be issued by 99CENTS Only Stores
in the Exchange Offer and (ii) the Proxy Statement of Universal to be used in
soliciting proxies of its shareholders for the special meeting of Universal
shareholders to be held on                  , including any adjournments or
postponements thereof. 99CENTS Only Stores is soliciting proxies for approval
from the shareholders of Universal, pursuant to Section 302A.671 of the
Minnesota Business Corporation Act (the "Minnesota Control Share Acquisition
Act"), of the voting rights associated with the shares of Universal Common Stock
acquired by 99CENTS Only Stores pursuant to the Exchange Offer (the "Control
Share Acquisition").
 
    THE CONSUMMATION OF THE EXCHANGE OFFER IS CONDITIONED UPON THE APPROVAL OF
UNIVERSAL'S SHAREHOLDERS WITH RESPECT TO 99CENTS ONLY STORES' PROPOSED CONTROL
SHARE ACQUISITION. ACCORDINGLY, IT IS OF THE UTMOST IMPORTANCE THAT SHAREHOLDERS
WHO WISH TO TENDER THEIR UNIVERSAL SHARES TO 99CENTS ONLY STORES VOTE "FOR" THE
APPROVAL OF VOTING RIGHTS FOR UNIVERSAL SHARES ACQUIRED IN THE EXCHANGE OFFER BY
SIGNING, DATING AND MAILING THE ENCLOSED PROXY CARD.
 
    Questions and requests for assistance or additional copies of this Proxy
Statement/Prospectus, the Letter of Transmittal and the Proxy Card (the
"Exchange Offer Documents") may be directed to the Dealer Manager or the
Information Agent at their respective addresses and telephone numbers set forth
on the back cover of this Proxy Statement/Prospectus.
 
    ------------------------------------------------------------------------
    THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
    NEW YORK CITY TIME, ON                , 1998, UNLESS THE EXCHANGE OFFER
    IS EXTENDED.
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    THE SECURITIES TO BE ISSUED PURSUANT TO THIS PROXY STATEMENT/PROSPECTUS HAVE
NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION OR
ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION
OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
PROXY STATEMENT/PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.
 
The Exchange Offer Documents are first being mailed to Universal shareholders on
                                    or about
                                          , 1998.
 
       The date of this Proxy Statement/Prospectus is            , 1998.
 
                 THE DEALER MANAGER FOR THE EXCHANGE OFFER IS:

                           FORWARD-LOOKING STATEMENTS
 
    IN ADDITION TO THE HISTORICAL INFORMATION CONTAINED OR INCORPORATED BY
REFERENCE HEREIN, THIS PROXY STATEMENT/PROSPECTUS CONTAINS OR INCORPORATES
FORWARD-LOOKING STATEMENTS WITHIN THE MEANING OF SECTION 27A OF THE SECURITIES
ACT CONCERNING THE COMPANY'S OPERATIONS, UNIVERSAL'S OPERATIONS, EXPANSION
PLANS, ECONOMIC PERFORMANCE, FINANCIAL CONDITION, THE PENDING ACQUISITIONS OF
UNIVERSAL AND ODD'S-N-END'S AND THEIR EFFECT ON THE COMPANY'S RESULTS OF
OPERATIONS, FUTURE RESULTS OF OPERATIONS OF UNIVERSAL AND ODD'S-N-END'S, STORE
OPENINGS, PURCHASING ABILITIES, SALES PER SQUARE FOOT AND COMPARABLE STORE NET
SALES TRENDS AND CAPITAL REQUIREMENTS. SUCH FORWARD-LOOKING STATEMENTS MAY BE
IDENTIFIED BY THE USE OF WORDS SUCH AS "BELIEVE," "ANTICIPATE," "INTEND" AND
"EXPECT." SUCH FORWARD-LOOKING STATEMENTS ARE SUBJECT TO VARIOUS RISKS AND
UNCERTAINTIES, CERTAIN OF WHICH ARE BEYOND THE COMPANY'S CONTROL. ACTUAL RESULTS
COULD DIFFER MATERIALLY FROM THOSE CURRENTLY ANTICIPATED DUE TO A NUMBER OF
FACTORS, INCLUDING THOSE DISCUSSED UNDER THE CAPTION "RISK FACTORS." SOME OF
THOSE FACTORS INCLUDE (i) THE COMPANY'S ABILITY TO OPEN NEW STORES ON A TIMELY
BASIS AND OPERATE THEM PROFITABLY, (ii) THE COMPANY'S ABILITY TO INTEGRATE
UNIVERSAL AND ODD'S-N-END'S, ACHIEVE ANTICIPATED OPERATING SYNERGIES AND TO
OPERATE THEIR STORES AT MULTIPLE PRICE POINTS AND IN DIFFERENT GEOGRAPHIC
LOCATIONS, (iii) THE COMPANY'S ABILITY TO ACHIEVE COST SAVINGS FROM THE
ACQUISITION OF UNIVERSAL, (iv) THE ORDERLY OPERATION OF THE COMPANY'S RECEIVING
AND DISTRIBUTION PROCESS, (v) INFLATION, CONSUMER CONFIDENCE AND OTHER GENERAL
ECONOMIC FACTORS, (vi) THE AVAILABILITY OF ADEQUATE INVENTORY AND CAPITAL
RESOURCES, (vii) THE RISK OF A DISRUPTION IN SALES VOLUME IN THE FOURTH QUARTER
AND OTHER SEASONAL FACTORS AS DISCUSSED IN MANAGEMENT'S DISCUSSION AND ANALYSIS
AND RESULTS OF OPERATIONS--SEASONALITY AND QUARTERLY FLUCTUATIONS," (viii)
DEPENDENCE ON KEY PERSONNEL AND CONTROL FOR THE COMPANY BY EXISTING SHAREHOLDERS
AND (ix) INCREASED COMPETITION FROM NEW ENTRANTS INTO THE DEEP-DISCOUNT RETAIL
INDUSTRY. THE COMPANY DOES NOT ORDINARILY MAKE PROJECTIONS OF ITS FUTURE
OPERATING RESULTS AND UNDERTAKES NO OBLIGATION TO PUBLICLY UPDATE OR REVISE ANY
FORWARD-LOOKING STATEMENTS, WHETHER AS A RESULT OF NEW INFORMATION, FUTURE
EVENTS OR OTHERWISE. SEE "RISK FACTORS." FURTHER DISCUSSION OF OTHER FACTORS
WHICH COULD AFFECT THE FINANCIAL RESULTS OF 99CENTS ONLY STORES AFTER
CONSUMMATION OF THE EXCHANGE OFFER AND THE TRANSACTIONS CONTEMPLATED HEREBY ARE
INCLUDED IN THE COMMISSION FILINGS INCORPORATED BY REFERENCE HEREIN.
 
                                   IMPORTANT
 
    Any shareholder desiring to tender shares of Universal Common Stock and the
associated common share purchase rights, should either (1) complete and sign the
Letter of Transmittal (or a facsimile thereof) in accordance with the
instructions in the Letter of Transmittal and mail or deliver it together with
the certificate(s) evidencing tendered Universal Shares, and any other required
documents, to the Exchange Agent or tender such Universal Shares pursuant to the
procedure for book-entry transfer set forth in "THE EXCHANGE OFFER--Procedures
for Accepting the Exchange Offer and Tendering Shares" or (2) request such
holder's broker, dealer, commercial bank, trust company or other nominee to
effect the transaction for such holder. Any shareholder whose Universal Shares
are registered in the name of a broker, dealer, commercial bank, trust company
or other nominee must contact such broker, dealer, commercial bank, trust
company or other nominee if such holder desires to tender such Universal Shares.
 
    Universal Shareholders will be required to tender one Right for each share
of Universal Common Stock tendered in order to effect a valid tender of
Universal Shares, unless the Rights Agreement Condition (as defined) has been
satisfied or waived. Unless the Distribution Date (as defined) occurs, a

tender of shares of Universal Common Stock will constitute a tender of the
associated Rights. See "THE EXCHANGE OFFER--Certain Conditions of the Exchange
Offer."
 
    A shareholder who desires to tender Universal Shares and whose certificates
evidencing such Universal Shares are not immediately available, or who cannot
comply with the procedure for book-entry transfer on a timely basis, may tender
such Universal Shares by following the procedure for guaranteed delivery set
forth in "THE EXCHANGE OFFER--Procedures for Accepting the Exchange Offer and
Tendering Shares."
 
    NO DEALER, SALESMAN OR OTHER PERSON IS AUTHORIZED TO GIVE ANY INFORMATION OR
TO MAKE ANY REPRESENTATION OTHER THAN THOSE CONTAINED OR INCORPORATED BY
REFERENCE IN THIS PROXY STATEMENT/PROSPECTUS WITH RESPECT TO THE TRANSACTIONS
CONTEMPLATED HEREBY, AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION
MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY 99CENTS ONLY STORES OR THE
DEALER MANAGER. THE DELIVERY OF THIS PROXY STATEMENT/PROSPECTUS DOES NOT
CONSTITUTE AN OFFER TO SELL, OR THE SOLICITATION OF ANY OFFER TO BUY, THE
SECURITIES OFFERED HEREBY OR A SOLICITATION OF A PROXY IN ANY JURISDICTION IN
WHICH SUCH OFFER OR SOLICITATION IS UNLAWFUL. NEITHER THE DELIVERY OF THIS PROXY
STATEMENT/PROSPECTUS NOR THE ISSUANCE OF ANY SECURITIES HEREUNDER SHALL UNDER
ANY CIRCUMSTANCES CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF EITHER UNIVERSAL OR 99CENTS ONLY STORES SINCE THE DATE AS OF WHICH
INFORMATION IS FURNISHED OR THE DATE HEREOF.
 
    IN ANY JURISDICTION WHERE THE SECURITIES, BLUE SKY OR OTHER LAWS REQUIRE THE
EXCHANGE OFFER TO BE MADE TO THE PUBLIC BY A LICENSED BROKER OR DEALER, THE
EXCHANGE OFFER IS HEREBY MADE ON BEHALF OF 99CENTS ONLY STORES BY       , AS
DEALER MANAGER, OR ONE OR MORE REGISTERED BROKERS OR DEALERS THAT ARE LICENSED
UNDER THE LAWS OF SUCH JURISDICTION.
 
                             AVAILABLE INFORMATION
 
    99CENTS Only Stores has filed a Registration Statement on Form S-4 (together
with all amendments, documents incorporated by reference and exhibits thereto,
the "Registration Statement") under the Securities Act of 1933, as amended (the
"Securities Act"), with the Securities and Exchange Commission (the
"Commission") covering the 99CENTS Only Stores Common Stock to be issued in
connection with the Exchange Offer. In addition, 99CENTS Only Stores will be
filing a Tender Offer Statement on Schedule 14D-1 (the "Schedule 14D-1") with
the Commission in connection with the Exchange Offer pursuant to Rule 14d-3
under the Securities Exchange Act of 1934, as amended (the "Exchange Act"). As
permitted by the rules and regulations of the Commission, this Proxy
Statement/Prospectus omits certain information contained in the Registration
Statement and the Schedule 14D-1. For such information, reference is made to the
Registration Statement, the Schedule 14D-1 and the exhibits thereto.
 
    Pursuant to Rules 14d-9 and 14e-2 under the Exchange Act, Universal will be
required to file with the Commission a Solicitation/Recommendation Statement on
Schedule 14D-9 (the "Schedule 14D-9") furnishing certain information with
respect to its position concerning the Exchange Offer.
 
    99CENTS Only Stores and Universal each are subject to the informational
requirements of the Exchange Act, and in accordance therewith file reports,
proxy statements and other information with the Commission. The Registration
Statement, the reports, proxy statements and other information filed by each of
99CENTS Only Stores and Universal, and the Schedule 14D-1 and the Schedule 14D-9
can be inspected and copied at the Commission's Public Reference Section, Room
1024, 450 Fifth Street, N.W., Washington, D.C., 20549 and at the Commission's
regional offices at Suite 1400, Citicorp Center, 5600 West Madison Street,
Chicago, Illinois 60661 and Suite 1300, Seven World Trade Center, New York, New
York 10048 (except that the Schedule 14D-1, and the Schedule 14D-9 will not be
available at the regional offices of the Commission). Copies of such materials
can be obtained from the Commission at prescribed rates from the Public
Reference Section of the Commission at Room 1024, 450 Fifth Street, N.W.,
Washington, D.C. 20549. The 99CENTS Only Stores Common Stock is listed on the
New York Stock Exchange and such reports, proxy statements and other information
concerning 99CENTS Only Stores are
 
                                       2

available for inspection at the offices of the New York Stock Exchange, 20 Broad
Street, New York, New York 10005. The Universal Common Stock is listed on The
Nasdaq Stock Market's National Market tier (the "Nasdaq National Market") and
such reports, proxy statements and other information concerning Universal are
available for inspection at the offices of Nasdaq Operations, 1735 K Street,
N.W., Washington, D.C. 20006. The Commission also maintains a Web site that
contains reports, proxy and information statements and other information
regarding registrants that file electronically with the Commission (such as
99CENTS Only Stores and Universal) at http://www.sec.gov.
 
                    INCORPORATION OF DOCUMENTS BY REFERENCE
 
    The following documents previously filed with the Commission pursuant to the
Exchange Act by 99CENTS Only Stores (File No. 1-11735) are hereby incorporated
by reference in this Proxy Statement/ Prospectus:
 
        (a) Annual Report on Form 10-K for the fiscal year ended December 31,
    1997;
 
        (b) Current Reports on Form 8-K filed on February 19, 1998 and April 9,
    1998; and
 
        (c) The description of 99CENTS Only Stores Common Stock contained in
    99CENTS Only Stores' Registration Statement on Form 8-A declared effective
    on May 22, 1996.
 
    The following documents previously filed with the Commission pursuant to the
Exchange Act by Universal (File No. 0-18823) are hereby incorporated by
reference in this Proxy Statement/Prospectus:
 
        (a) Annual Report on Form 10-K for the fiscal year ended December 31,
    1997; and
 
        (b) Current Reports on Form 8-K filed February 10, 1998 and January 8,
    1998.
 
    Universal's Annual Report on Form 10-K for the fiscal year ended December
31, 1997 is being mailed to each Universal shareholder together with this Proxy
Statement/Prospectus.
 
    All documents and reports filed by 99CENTS Only Stores with the Commission
pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to
the date hereof and prior to the date on which the Exchange Offer is completed
shall be deemed to be incorporated by reference herein and to be a part hereof
from the respective dates of filing of such document or reports. Any statement
contained in a document incorporated or deemed to be incorporated by reference
herein shall be deemed to be modified or superseded for purposes of this Proxy
Statement/Prospectus to the extent that a statement contained herein, or in any
other subsequently filed document that also is or is deemed to be incorporated
by reference herein, modifies or supersedes such statement. Any such statement
so modified or superseded shall not be deemed, except as so modified or
superseded, to constitute a part of this Proxy Statement/ Prospectus.
 
    THIS PROXY STATEMENT/PROSPECTUS INCORPORATES DOCUMENTS BY REFERENCE RELATING
TO 99CENTS ONLY STORES WHICH ARE NOT PRESENTED HEREIN OR DELIVERED HEREWITH.
THESE DOCUMENTS (OTHER THAN EXHIBITS TO SUCH DOCUMENTS UNLESS SUCH EXHIBITS ARE
SPECIFICALLY INCORPORATED BY REFERENCE) ARE AVAILABLE TO ANY PERSON, INCLUDING
ANY BENEFICIAL OWNER, TO WHOM THIS PROXY STATEMENT/PROSPECTUS IS DELIVERED, UPON
WRITTEN OR ORAL REQUEST, WITHOUT CHARGE, FROM 99CENTS ONLY STORES, 4000 UNION
PACIFIC AVENUE, CITY OF COMMERCE, CALIFORNIA 90023, ATTENTION: ERIC SCHIFFER,
TELEPHONE: (213) 980-8145. IN ORDER TO ENSURE TIMELY DELIVERY OF THE DOCUMENTS,
ANY SUCH REQUEST SHOULD BE MADE NO LATER THAN NINE BUSINESS DAYS PRIOR TO THE
EXPIRATION DATE (AS DEFINED HEREIN).
 
                                       3

                                    SUMMARY
 
    THE FOLLOWING IS A SUMMARY OF CERTAIN INFORMATION CONTAINED ELSEWHERE IN
THIS PROXY STATEMENT/PROSPECTUS. REFERENCE IS MADE TO, AND THIS SUMMARY IS
QUALIFIED IN ITS ENTIRETY BY, THE MORE DETAILED INFORMATION CONTAINED OR
INCORPORATED BY REFERENCE IN THIS PROXY STATEMENT/PROSPECTUS AND THE ANNEXES
HERETO. HOLDERS OF UNIVERSAL COMMON STOCK ARE URGED TO READ THIS PROXY
STATEMENT/PROSPECTUS AND THE ANNEXES HERETO IN THEIR ENTIRETY.
 
THE COMPANIES
 
    99CENTS ONLY STORES.  99CENTS Only Stores is a leading deep-discount
retailer of primarily name-brand, consumable general merchandise at an
affordable, single price point of 99CENTS. The Company's stores offer a wide
assortment of regularly available consumer goods as well as a broad variety of
first-quality, close-out merchandise. In 1997, a majority of the Company's
product offerings were comprised of recognizable name-brand merchandise and were
regularly available for reorder. 99CENTS Only Stores provides customers
significant value on their everyday household needs and an exciting shopping
experience in customer-service-oriented stores which are attractively
merchandised, brightly lit and well-maintained. The Company believes that its
name-brand focus, along with a product mix emphasizing value-priced food and
beverage and other everyday household items, increases the frequency of consumer
visits and impulse purchases and reduces the Company's exposure to seasonality
and economic cycles. 99CENTS Only Stores believes its format appeals to
value-conscious customers in all socio-economic groups and results in a high
volume of sales. The Company's 55 existing 99CENTS Only Stores are located in
Southern California and have an average size of approximately 15,000 square
feet. The Company's 99CENTS Only Stores generated average net sales per
estimated saleable square foot of $354, which the Company believes is among the
highest in the deep-discount convenience store industry, and average net sales
per store of $3.8 million in 1997. 99CENTS Only Stores is a California
corporation with its principal executive offices at 4000 Union Pacific Avenue,
City of Commerce, California 90023. Its telephone number is (213) 980-8145.
 
    UNIVERSAL.  Universal, through its wholly-owned subsidiary, Only Deals Inc.,
owns and operates 44 retail stores in Minnesota and the surrounding upper
Midwest region and eight stores in Texas. Universal's retail operations sell
consumer goods in a variety of categories including food, health and beauty
aids, housewares, and many others. Universal owns approximately 41% of one of
its customers, Odd's-N-End's, Inc. ("Odd's-N-End's"), which operates 22 retail
stores in upstate New York. These stores are deep-discount retail stores
offering primarily close-out merchandise featuring a broad range of general
household items at multiple price points. Universal sells about one-half of the
items it offers for $1.00 or less. In 1997, Universal had consolidated net
sales, operating loss and net loss from continuing operations of $68.7 million,
$6.0 million and $7.4 million, respectively. Universal is a Minnesota
corporation with its principal executive offices at 5000 Winnetka Avenue North,
New Hope, Minnesota 55428. Its telephone number is (612) 533-1169.
 
RELATIONSHIP BETWEEN 99CENTS ONLY STORES AND UNIVERSAL; BACKGROUND OF THE
  EXCHANGE OFFER
 
    In November 1997, 99CENTS Only Stores acquired, pursuant to a stock purchase
agreement with Universal, 4,500,000 newly issued shares of Universal Common
Stock, or approximately 48% of all outstanding Universal Common Stock.
 
    Since that date, 99CENTS Only Stores has provided merchandise to Universal
which, as of March 31, 1998 approximated $1.4 million. After reviewing various
alternatives for its investment in Universal with its legal and financial
advisors, in February 1998, the Company announced its intention to acquire the
balance of the Universal and Odd's-N-End's shares not owned. The Company intends
to acquire the Universal Shares pursuant to this Exchange Offer of one share of
the Company's Common Stock for each 16 outstanding shares of Universal Common
Stock for an aggregate of approximately 305,800 shares of Company Common Stock.
The Company intends to acquire the balance of the Odd's-N-End's shares in a
 
                                       4

merger for an aggregate consideration of approximately $830,000 cash. Universal
currently has a note receivable due from Odd's-N'End's which approximated $10.5
million at March 31, 1998. See "BACKGROUND OF THE EXCHANGE OFFER AND RELATED
MATTERS."
 
    Although Houlihan Lokey Howard & Zukin Financial Advisors, Inc. ("Houlihan
Lokey") has advised 99CENTS Only Stores with respect to the Exchange Offer and
has delivered an opinion to the Board of Directors of 99CENTS Only Stores to the
effect that as of the date of such opinion, the Universal Exchange Consideration
(as defined) to be furnished by 99CENTS Only Stores is fair to the holders of
Universal Common Stock (other than 99CENTS Only Stores) from a financial point
of view, due to the composition of the Board of Universal including three
designees of 99CENTS Only Stores and two designees of Universal, the Universal
Board of Directors has decided to remain neutral with respect to the Exchange
Offer and has not made a determination that the Exchange Offer is fair to or in
the best interests of Universal and its shareholders and neither recommends a
vote for or a vote against the approval of 99CENTS Only Stores Voting Rights.
However, Universal has agreed to support the Exchange Offer and to assist
99CENTS Only Stores in its solicitation of the Universal shareholders. See
- --"The Cooperation Agreement." See "Background of the Exchange Offer and Related
Matters--No Recommendation of the Universal Board of Directors."
 
    The Board of Directors of 99CENTS Only Stores has received the opinion of
Houlihan Lokey and has voted unanimously to approve the Exchange Offer. The
Board of Directors of 99 CENTS Only Stores recommends that shareholders of
Universal tender their shares of Universal Common Stock and vote in favor of
99CENTS Only Stores Voting Rights.
 
ADVANTAGES TO UNIVERSAL SHAREHOLDERS
 
    SIGNIFICANT PREMIUM.  The Exchange Offer provides shareholders of Universal
an opportunity to receive a significant premium for their Universal Shares. The
Exchange Consideration represents a    % and    % premium to the Universal
Common Stock's closing sales prices one day and one week, respectively, prior to
the date 99CENTS Only Stores announced the acquisition of its initial position
in Universal in November 1997.
 
    CONTINUED DISCOUNT RETAILER INVESTMENT OPPORTUNITY.  If the Exchange Offer
is consummated, Universal's current operations will be combined with 99CENTS
Only Stores and Universal's existing shareholders will become shareholders of
99CENTS Only Stores. The former Universal shareholders will continue to
participate in the deep-discount retail and wholesale industry.
 
    Management. 99CENTS Only Stores believes that a significant portion of its
existing success is attributable to its strong management and dedicated
employees. As the nation's oldest one-price general merchandise chain, 99CENTS
Only Stores has assembled a quality management team. 99CENTS Only Stores' senior
management has been stable and consistent over the last several years and has
contributed significantly to 99CENTS Only Stores' results.
 
    SUPERIOR STOCK PERFORMANCE.  Since its initial public offering in 1996,
99CENTS Only Stores has produced share price appreciation in excess of
Universal. 99CENTS Only Stores' share price growth since May 1996 was    percent
versus Universal's    percent for the same period. Past stock price performance
is not necessarily indicative of likely future stock price performance.
 
    RISKS OF FAILURE TO TENDER.  Shareholders of Universal now have the
opportunity to receive a premium for their Universal Shares, and to participate
in the benefits of 99CENTS Only Stores' operating capabilities and financial
results, by participating in the Exchange Offer. By declining an opportunity to
exchange Universal Shares for 99CENTS Only Stores Common Stock, and choosing
instead to continue
 
                                       5

with an investment in Universal, shareholders are assuming the risk that the
value of Universal Shares may not appreciate following the Exchange Offer. This
risk may be intensified by the following issues:
 
    - Arthur Andersen LLP's audit opinion issued in March 1998 expressed doubt
      about Universal's ability to continue as a going concern.
 
    - Universal's financial condition--Universal has reported losses in each of
      the last eight fiscal quarters.
 
    - Universal's need for infusions of working capital to continue operations.
 
THE COOPERATION AGREEMENT
 
    In connection with the Exchange Offer, 99CENTS Only Stores and Universal
entered into an agreement dated as of March 4, 1998 (the "Cooperation
Agreement"), a copy of which is attached hereto as Annex A. The Cooperation
Agreement provides that Universal will support the Exchange Offer and will
provide to 99CENTS Only Stores access to the books and records of Universal, as
well as to Universal's officers and directors for purposes of preparing filings
and completing due diligence. In addition Universal agreed to file a Schedule
14D-9 with respect to the Exchange Offer and agreed not to oppose the Exchange
Offer in the Schedule 14D-9. Universal also agreed to promptly furnish to
99CENTS Only Stores mailing labels, security position listings and any other
available listing or computer file containing the names and addresses of the
record holders of Universal Common Stock for purposes of mailing the Exchange
Offer Documents.
 
    Promptly upon the purchase by 99CENTS Only Stores of Universal Shares
pursuant to the Exchange Offer (provided that not less than 32% of the
outstanding shares of Universal Common Stock (other than shares owned by 99CENTS
Only Stores) are validly tendered and not withdrawn (the "Minimum Condition"))
and from time to time thereafter, 99CENTS Only Stores shall be entitled, subject
to compliance with Section 14(f) of the Exchange Act, to designate up to such
number of directors, rounded down to the next whole number (except where such
rounding down would cause 99CENTS Only Stores to not be entitled to designate at
least a majority of directors on the Board, in which case, such number will be
rounded up) on the Board of Directors of Universal as will give 99CENTS Only
Stores representation on the Board equal to the product of the number of
directors on the Board (giving effect to the directors elected pursuant to this
sentence) multiplied by the percentage that the aggregate number of shares of
Universal Common Stock then beneficially owned by 99CENTS Only Stores and its
affiliates following such purchase bears to the total number of shares of
Universal Common Stock then outstanding. In the Cooperation Agreement, Universal
agreed to promptly take all actions necessary to cause 99CENTS Only Stores'
designees to be elected or appointed as directors of Universal, including
increasing the size of the Board or securing the resignations of incumbent
directors or both. 99CENTS Only Stores has named three of the five current
directors to the Board of Universal.
 
    Universal also agreed to use its best efforts to assist 99CENTS Only Stores
in obtaining the approval of its shareholders under the Minnesota Control Share
Acquisition Act to provide voting rights to the Universal Common Stock acquired
by 99CENTS Only Stores in the Exchange Offer. Universal further agreed to take
all action necessary to either (a) amend the Rights Agreement so that the
Exchange Offer would not cause (i) the occurrence of a "Distribution Date" (as
such term is defined in the Rights Agreement) or (ii) the common stock purchase
rights issued pursuant to the Rights Agreement becoming evidenced by, and
transferable pursuant to, certificates separate from the certificates
representing the Universal Common Stock or (b) redeem the rights before 99CENTS
Only Stores becomes an "Acquiring Person" pursuant to the terms of the Rights
Agreement. The Rights Agreement was amended as of April 20, 1998. See
"Agreements Relating to Exchange Offer--The Cooperation Agreement."
 
    According to the Annual Report on Form 10-K filed by Universal for the year
ended December 31, 1997, as of March 17, 1998, 9,393,328 shares of Universal
Common Stock were issued and outstanding (of
 
                                       6

which 4,500,000 shares were held by 99CENTS Only Stores). As a result, as of
such date, the Minimum Condition would be satisfied if 99CENTS Only Stores
acquired 3,014,662 outstanding Universal Shares, assuming no further issuances
of shares by Universal.
 
THE EXCHANGE OFFER
 
    TERMS OF THE EXCHANGE OFFER.  99CENTS Only Stores is offering to exchange
one share of 99CENTS Only Stores Common Stock for each 16 outstanding shares of
Universal Common Stock (the "Universal Exchange Consideration"). To be eligible
to receive the Universal Exchange Consideration, a holder of Universal Shares
must validly tender for exchange Universal Shares and not withdraw such
Universal Shares on or prior to the Expiration Date (as defined below). No
fractional shares of 99CENTS Only Stores Common Stock will be distributed in
connection with the Exchange Offer. Holders of Universal Shares who would
otherwise be entitled to receive a fractional share of 99CENTS Only Stores
Common Stock will be paid cash in lieu of such fraction. See "THE EXCHANGE
OFFER--Terms of the Exchange Offer; Expiration Date."
 
    PURPOSE OF THE EXCHANGE OFFER.  The purpose of the Exchange Offer is for
99CENTS Only Stores to acquire control of, and ultimately the entire common
equity interest in, Universal.
 
    EXPIRATION DATE; EXTENSION AND AMENDMENT; TERMINATION.  The Exchange Offer
will expire at 12:00 midnight, New York City time, on            , 1998 (the
"Expiration Date"), unless the Exchange Offer is extended, in which case the
term "Expiration Date" shall mean the last date and time to which the Exchange
Offer is extended. 99CENTS Only Stores expressly reserves the right, in its sole
discretion, at any time or from time to time to (i) extend the period of time
during which the Exchange Offer is to remain open by giving oral or written
notice of such extension to the Exchange Agent, (ii) amend the Exchange Offer,
(iii) delay acceptance for exchange of, or exchange for, any Universal Shares
and (iv) terminate the Exchange Offer. See "THE EXCHANGE OFFER--Extension of
Tender Period; Termination; Amendment."
 
    CONDITIONS OF THE EXCHANGE OFFER.  The Exchange Offer is subject to certain
conditions, including that (i) not less than 32% of the outstanding shares of
Universal Common Stock (other than shares owned by 99 CENTS Only Stores) are
validly tendered and not withdrawn in the Exchange Offer and (ii) Universal
shareholders approve the granting of voting rights to the shares of Universal
Common Stock acquired by 99CENTS Only Stores in the Exchange Offer. If such
conditions are not met, 99CENTS Only Stores may terminate the Exchange Offer or
waive such conditions and purchase those shares of Universal Common Stock that
have been validly tendered. If 99CENTS Only Stores acquires in the Exchange
Offer less than 32% of the outstanding shares of Universal Common Stock (other
than shares owned by 99 CENTS Only Stores), 99CENTS Only Stores may maintain its
minority position or it may from time to time purchase additional shares of
Universal Common Stock or sell Universal Common Stock, depending on its
strategic objectives, market conditions and other factors. See "THE EXCHANGE
OFFER--Certain Conditions of the Exchange Offer."
 
    PROCEDURES FOR TENDERING.  Holders of Universal Common Stock desiring to
accept the Exchange Offer must complete and sign the Letter of Transmittal in
accordance with the instructions contained therein and forward or hand deliver
it, together with any other required documents, to the Exchange Agent (as
defined below), either with the Universal Common Stock to be tendered or in
compliance with the specified procedures for guaranteed delivery of Universal
Common Stock. Certain financial institutions may also effect tenders by
book-entry transfer through The Depository Trust Company, the Midwest Securities
Trust Company and the Philadelphia Depository Trust Company (collectively the
"Book-Entry Transfer Facilities"). Holders of Universal Common Stock having such
Universal Common Stock registered in the name of a broker, dealer, commercial
bank, trust company or nominee are urged to contact such person promptly if they
wish to tender any Universal Common Stock. See "THE EXCHANGE OFFER-- Procedures
for Accepting the Exchange Offer and Tendering Shares."
 
                                       7

    WITHDRAWAL RIGHTS.  Subject to the conditions set forth herein, tenders of
Universal Common Stock may be withdrawn at any time on or prior to the
Expiration Date, and, unless theretofore accepted for exchange pursuant to the
Exchange Offer, after            , 1998. See "THE EXCHANGE OFFER-- Procedures
for Accepting the Exchange Offer and Tendering Shares--Withdrawal Rights."
 
    DELIVERY OF UNIVERSAL EXCHANGE CONSIDERATION.  Upon the terms and subject to
the conditions of the Exchange Offer, the acceptance for exchange, and the
exchange, of all outstanding Universal Common Stock validly tendered and not
theretofore withdrawn will be made as soon as practicable after the Expiration
Date. See "THE EXCHANGE OFFER--Exchange of Universal Common Stock."
 
    EXCHANGE AGENT.                    has been appointed exchange agent (the
"Exchange Agent") in connection with the Exchange Offer. The Letter of
Transmittal (or a facsimile copy thereof) and certificates for Universal Common
Stock should be sent by each holder of Universal Common Stock or such holder's
broker, dealer, bank or other nominee thereof to the Exchange Agent at the
addresses set forth on the back cover of this Proxy Statement/Prospectus.
 
    CONSEQUENCES TO NON-TENDERING HOLDERS OF UNIVERSAL COMMON STOCK.  The rights
of non-tendering holders of Universal Common Stock will not be altered, impaired
or modified by the Exchange Offer. However, the purchase of Universal Shares
pursuant to the Exchange Offer will reduce the number of holders of Universal
Common Stock and the number of shares of Universal Common Stock that might
otherwise trade publicly and could adversely affect the liquidity and market
value of the remaining Universal Common Stock, if any, held by the public. The
Universal Common Stock is currently listed and quoted on the Nasdaq National
Market, which constitutes the principal trading market for the Universal Common
Stock. Depending on the number of shares of Universal Common Stock purchased
pursuant to the Exchange Offer, the Universal Common Stock may no longer meet
the requirements for continued listing on the Nasdaq National Market and
consequently may be delisted. Universal Common Stock is currently registered
under the Exchange Act. Depending on the number of shares of Universal Common
Stock purchased pursuant to the Exchange Offer, the Universal Common Stock might
become eligible for termination of registration under the Exchange Act. 99CENTS
Only Stores intends to seek termination of registration of the Universal Common
Stock under the Exchange Act as soon after the completion of the Exchange Offer
as the requirements for such termination are met. Such delisting and termination
could materially adversely affect the market for the Universal Common Stock. In
addition, depending on the number of shares of Universal Common Stock tendered,
the Universal Common Stock may no longer constitute "margin securities" for
purposes of the Federal Reserve Board's margin regulations, in which event the
Universal Common Stock could no longer be used as collateral for margin loans
made by brokers. Further, 99CENTS Only Stores does not currently intend to merge
Universal with 99CENTS Only Stores. Consequently, if the Company's Exchange
Offer is successful, shareholders of Universal who do not tender may have to
retain their investment indefinitely. 99CENTS Only Stores has no current
intention to pay dividends on the Universal Shares.
 
    OWNERSHIP OF 99CENTS ONLY STORES COMMON STOCK AFTER THE TRANSACTION.  After
giving effect to the Exchange Offer (assuming all of the Universal shareholders
tender) and assuming no exercise of any outstanding options, warrants or rights
entitling the holders thereof to receive 99CENTS Only Stores Common Stock, the
former holders of Universal Common Stock will own, in the aggregate,
approximately 1.6% of the outstanding 99CENTS Only Stores Common Stock, based on
the number of shares of 99CENTS Only Stores Common Stock outstanding as of March
31, 1998.
 
    INTERESTS OF CERTAIN PERSONS IN THE TRANSACTION.  Certain of Universal's
directors and officers have interests in the Exchange Offer that are in addition
to, and potentially in conflict with, the interests of the holders of Universal
Common Stock. See "BACKGROUND OF THE TRANSACTION AND RELATED MATTERS--Interests
of Certain Persons in the Transaction."
 
                                       8

    NO RECOMMENDATION OF THE UNIVERSAL BOARD OF DIRECTORS.  Although Houlihan
Lokey has delivered an opinion to 99CENTS Only Stores to the effect that as of
the date of such opinion the Universal Exchange Consideration (as defined) to be
furnished by 99CENTS Only Stores is fair to the holders of Universal Common
Stock (other than 99CENTS Only Stores) from a financial point of view, due to
the composition of the Board of Universal including three designees of 99CENTS
Only Stores and two designees of Universal, the Universal Board of Directors has
decided to remain neutral with respect to the Exchange Offer and has not made a
determination that the Exchange Offer is fair to or in the best interests of
Universal and its shareholders and neither recommends a vote for or a vote
against the approval of 99CENTS Only Stores Voting Rights. However, Universal
has agreed to support the Exchange Offer and to assist 99CENTS Only Stores in
its solicitation of the Universal shareholders. See --"The Cooperation
Agreement." See "Background of the Exchange Offer and Related Matters--No
Recommendation of the Universal Board of Directors."
 
    OPINION OF FINANCIAL ADVISOR.  Houlihan Lokey made an oral presentation on
February 16, 1998 to the Board of Directors of 99CENTS Only Stores (which
presentation was confirmed by an opinion delivered in writing to the 99CENTS
Only Stores Board of Directors) to the effect that, as of the date of such
opinion, the Universal Exchange Consideration to be received by the holders of
Universal Common Stock (other than 99CENTS Only Stores) is fair, from a
financial point of view, to such holders. A copy of the opinion of Houlihan
Lokey setting forth the assumptions made, the matters considered, the scope and
limitations of the review undertaken and the procedures followed by Houlihan
Lokey in rendering such opinion is attached to this Proxy Statement/Prospectus
as Annex B. Such opinion should be carefully read in its entirety by holders of
Universal Common Stock. See "BACKGROUND OF THE TRANSACTION AND RELATED
MATTERS--Opinion of the Financial Advisor."
 
    ACCOUNTING TREATMENT OF EXCHANGE OFFER.  Under applicable accounting
standards, the Exchange Offer will be treated as a purchase of Universal by
99CENTS Only Stores. See "ACCOUNTING TREATMENT."
 
    FEDERAL INCOME TAX CONSEQUENCES OF THE EXCHANGE OFFER.  It is expected that
the Exchange Offer will be treated for federal income tax purposes as a taxable
transaction. Holders of Universal Common Stock are strongly encouraged to
consult their own tax advisors regarding the tax consequences of the Exchange
Offer. See "THE EXCHANGE OFFER--Certain Federal Income Tax Consequences."
 
    APPRAISAL RIGHTS.  Holders of Universal Common Stock will not be entitled to
appraisal rights in connection with the Exchange Offer. See "THE UNIVERSAL
SPECIAL MEETING--Appraisal Rights."
 
    LISTING.  The 99CENTS Only Stores Common Stock is listed on the New York
Stock Exchange. Application will be made by 99CENTS Only Stores to list the
Universal Exchange Consideration on the New York Stock Exchange.
 
                                       9

RISK FACTORS
 
    Holders of Universal Common Stock should consider certain risks relating to
an investment in 99CENTS Only Stores. See "RISK FACTORS."
 
REGULATORY APPROVALS
 
    HSR APPROVAL.  The Exchange Offer is reportable by 99CENTS Only Stores under
the Hart-Scott-Rodino Antitrust Improvements Act of 1976 ("HSR Act"). A
Notification and Report Form under the HSR Act was filed on April 21, 1998 and
early termination of the waiting period under the HSR Act with respect to the
Exchange Offer was requested. See "THE EXCHANGE OFFER--Regulatory Approvals."
 
    SPECIAL MEETING OF UNIVERSAL SHAREHOLDERS.  The Minnesota Control Share
Acquisition Act ("Section 671 of the MBCA") denies voting rights to shares of
Universal Common Stock acquired over thresholds of 20%, 33 % and 50%, unless the
shareholders of Universal approve voting rights for the shares by (i) the
affirmative vote of the holders of a majority of all shares entitled to vote,
and (ii) the affirmative vote of the holders of a majority of all outstanding
shares entitled to vote, excluding "interested shares." "Interested Shares"
consist of all shares of Universal Common Stock held by an "Acquiring Person,"
any officers of Universal and any directors of Universal who are also employees
of Universal. An "Acquiring Person" is any person that makes or proposes to make
an acquisition of beneficial ownership of shares of Universal Common Stock that
would, when added to all other shares of Universal Common Stock beneficially
owned by such person, entitle such person immediately after such acquisition to
direct the exercise of voting power over any of the percentage thresholds
referred to above.
 
    The effect of Section 671 of the MBCA is that minority shareholders can
defeat the proposal to accord voting rights to the Universal Shares acquired by
99CENTS Only Stores, even if the Exchange Offer is approved by the affirmative
vote of the holders of a majority of all outstanding shares entitled to vote.
 
    Pursuant to Section 671 of the MBCA, a special meeting of shareholders of
Universal will be held on            ,1998 at   :   .m. (local time) at the
                  (including any adjournments and postponements thereof, the
"Universal Special Meeting"). The purpose of the Universal Special Meeting is to
consider and vote upon a proposal to approve voting rights (the "99CENTS Only
Stores Voting Rights") for shares of Universal Common Stock acquired by 99CENTS
Only Stores pursuant to the Exchange Offer. Only shareholders of record at the
close of business on            , 1998 (the "Universal Record Date") will be
entitled to notice of, and to vote at, the Universal Special Meeting. 99CENTS
Only Stores has no obligation to consummate the Exchange Offer if Universal
shareholders do not vote for the 99CENTS Only Stores Voting Rights.
 
    On February 24, 1998, 99CENTS Only Stores and each of Mark Ravich, Norman
Ravich and certain trusts for which Mark Ravich is the trustee (the "Principal
Stockholders") entered into separate Stockholder Support Agreements in which
each Principal Stockholder agreed to vote his shares of Universal Common Stock
(i) in favor of the Exchange Offer and (ii) in favor of any other matter deemed
necessary by 99CENTS Only Stores to effectuate the Exchange Offer or solicited
in connection with the Exchange Offer and considered and voted upon by the
shareholders of Universal. In addition, each shareholder executing a Stockholder
Support Agreement agreed to tender and sell all of its Universal Common Stock to
99CENTS Only Stores pursuant to the terms of the Exchange Offer. Together the
Principal Stockholders owned, as of the Record Date, 994,092 shares of Universal
Common Stock or approximately 20% of shares outstanding, not including the
shares held by 99CENTS Only Stores. Shares other than "interested shares" at the
Universal Record Date will constitute approximately 52% of the outstanding
Universal Common Stock.
 
                                       10

    As of the Universal Record Date, all executive officers and directors of
Universal, together with their respective affiliates, owned in the aggregate
1,000 shares of Universal Common Stock. See "THE UNIVERSAL SPECIAL MEETING."
 
COMPARATIVE MARKET PRICE DATA AND DIVIDEND INFORMATION
 
    The 99CENTS Only Stores Common Stock is traded on the New York Stock
Exchange ("NYSE") under the symbol "NDN." The Universal Common Stock is traded
on the Nasdaq National Market under the symbol "UNIV." The following table sets
forth, for the calendar periods indicated, the high and low closing prices per
share of 99CENTS Only Stores Common Stock and of Universal Common Stock, as
reported by the New York Stock Exchange and Nasdaq National Market,
respectively. On March 31, 1998, there were approximately 3,900 holders of
record of 99CENTS Only Stores Common Stock and according to the Annual Report on
Form 10-K for the year ended December 31, 1997, as of March 17, 1998 there were
over 100 holders of record of the Universal Common Stock.
 


                                                           99CENTS ONLY STORES
                                                                                      UNIVERSAL
                                                               COMMON STOCK          COMMON STOCK
                                                           --------------------  --------------------
                                                                                
                                                             HIGH        LOW       HIGH        LOW
                                                           ---------  ---------  ---------  ---------
1996
First Quarter (1)........................................  $  --      $  --      $    5.25  $    3.38
Second Quarter (1).......................................      12.70      10.91       5.13       4.38
Third Quarter............................................      12.20      10.50       4.63       2.63
Fourth Quarter...........................................      13.91      10.70       2.88       1.63
 
1997
First Quarter............................................  $   16.09  $   12.80  $    2.75  $    1.13
Second Quarter...........................................      24.09      15.50       1.94       0.31
Third Quarter............................................      27.59      21.60       1.00       0.50
Fourth Quarter...........................................      30.56      25.60       4.00       0.72
 
1998
First Quarter............................................  $   39.50  $   27.00  $    2.75  $    1.69
Second Quarter (through April 17, 1998)..................      39.31      34.19       2.28       2.00

 
- ------------------------
 
(1) Trading in 99CENTS Only Stores Common Stock commenced on the New York Stock
    Exchange on May 23, 1996. Prior to that time, there was no public market for
    the 99CENTS Only Stores Common Stock. All 99CENTS Only Stores stock prices
    have been restated to reflect a five-for-four stock split effected in the
    form of a stock dividend which was paid on December 1, 1997.
 
    The following table sets forth the closing market price per share of 99CENTS
Only Stores Common Stock on an historical basis and the market price per share
of Universal Common Stock on an historical and equivalent per share basis (i) on
February 13, 1998, the last trading day preceding public announcement of 99CENTS
Only Stores' proposal to acquire 100% of the Universal Common Stock and (ii) on
           , 1998, the last trading day preceding the date of this Proxy
Statement/Prospectus. The historical market prices represent the closing prices
per share on such dates on the NYSE with respect to 99CENTS Only Stores and on
the Nasdaq National Market with respect to Universal. The equivalent
 
                                       11

market prices per share represent the closing price per share of 99CENTS Only
Stores Common Stock multiplied by 1/16.
 


                        99CENTS
                         ONLY                    UNIVERSAL
                        STORES      UNIVERSAL   EQUIVALENT
        DATE          HISTORICAL   HISTORICAL    PER SHARE
- --------------------  -----------  -----------  -----------
                                       
February 13, 1998...   $   33.56    $    2.06    $    2.10
          , 1998       $            $            $

 
    Because the Universal Exchange Consideration is fixed and because the market
price of 99CENTS Only Stores Common Stock is subject to fluctuation, the market
value of the shares of 99CENTS Only Stores Common Stock that holders of
Universal Common Stock will receive in the Exchange Offer may increase or
decrease prior to and following the Exchange Offer. 99CENTS Only Stores has not
paid any cash dividends on the 99CENTS Only Stores Common Stock since its
initial public offering in May 1996. 99CENTS Only Stores anticipates that all of
its income in the foreseeable future will be retained for the development and
expansion of its business and therefore does not anticipate paying dividends on
the 99CENTS Only Stores Common Stock in the foreseeable future.
 
    Universal has not declared any cash dividends on the Universal Common Stock
within the past 10 years. Universal presently intends to continue to retain all
of its income in the foreseeable future for the development and expansion of its
business. In addition, dividends currently are prohibited by the terms of
Universal's revolving credit agreement. Universal, therefore, does not
anticipate paying dividends on the Universal Common Stock in the foreseeable
future.
 
    HOLDERS OF UNIVERSAL COMMON STOCK ARE URGED TO OBTAIN CURRENT MARKET
QUOTATIONS FOR THE UNIVERSAL COMMON STOCK AND THE 99CENTS ONLY STORES COMMON
STOCK.
 
COMPARISON OF MINNESOTA AND CALIFORNIA LAW
 
    One of the results of the Exchange Offer is that exchanging shareholders of
Universal, whose rights are governed by Minnesota law, will become shareholders
of 99CENTS Only Stores, whose rights are governed by California law. The
statutes and court decisions with respect to the rights of shareholders of
corporations incorporated under the laws of those two jurisdictions reflect
certain differences, including among others, differences in the available source
of dividends; redemption of shares; the rights of shareholders to call special
meetings of shareholders; the exercise of appraisal rights; and the votes
required in order to authorize certain actions and corporate transactions. See
"COMPARISON OF RIGHTS OF SHAREHOLDERS OF 99CENTS Only STORES AND UNIVERSAL."
 
RECENT DEVELOPMENTS
 
    Concurrently with the announcement that 99CENTS Only Stores proposed to
acquire Universal for the Universal Exchange Consideration, 99CENTS Only Stores
also announced a proposal to acquire 100% of an approximately 41% owned
subsidiary of Universal, Odd's-N-End's. 99CENTS Only Stores and Odd's-N-End's
entered into a definitive merger agreement with respect to the acquisition in
March 1998 pursuant to which 99CENTS Only Stores agreed to acquire the balance
of the Odd's-N-End's shares not owned by Universal for an aggregate
consideration of approximately $830,000 cash. Universal currently has a note
receivable due from Odd's-N-End's which approximated $10.5 million at March 31,
1998. 99CENTS Only Stores currently intends to complete the acquisition of
Odd's-N-End's immediately following consummation of the Exchange Offer. The
acquisition of Odd's-N-End's is subject to approval of the stockholders of
Odd's-N-End's, the ownership by 99CENTS Only Stores after the Exchange Offer of
more than 80% of the Universal Common Stock and other customary closing
conditions. On March 2, 1998, Universal executed a proxy giving 99CENTS Only
Stores the right to vote the shares of Odd's-N-End's held by Universal in favor
of the merger. See "99CENTS Only STORES --Recent Developments."
 
                                       12

    On March 31, 1998, the Company announced that it had filed a registration
statement with the Securities and Exchange Commission covering a public offering
of an aggregate of 3,500,000 shares of Common Stock (4,025,000 shares if the
underwriters' over-allotment option is exercised in full). Of the shares to be
offered, the Company is offering to sell 750,000 newly issued shares (862,500
shares if the underwriters' over-allotment option is exercised in full) and
certain shareholders of the Company are offering to sell the balance of the
shares. If consummated as proposed, the net proceeds of the offering to the
Company will vary depending upon market conditions at the time of the offering,
but are currently estimated to be approximately $25.2 million. The Company will
not receive any of the net proceeds from the sale of shares by the selling
shareholders. The Company intends to use approximately $16.0 million of the net
proceeds to retire certain liabilities of Universal. The remaining net proceeds
will be used for store expansion and working capital. There can be no assurance
that the offering will actually be consummated.
 
                                       13

                                  RISK FACTORS
 
    HOLDERS OF UNIVERSAL COMMON STOCK SHOULD CAREFULLY CONSIDER THE FOLLOWING
RISK FACTORS, IN ADDITION TO THE OTHER INFORMATION CONTAINED HEREIN, BEFORE
TENDERING UNIVERSAL SHARES.
 
DEPENDENCE ON NEW STORE OPENINGS FOR FUTURE GROWTH
 
    99CENTS Only Stores' future operating results will depend largely upon its
ability to open and operate new stores successfully and to manage a larger
business profitably. In 1995, 1996 and 1997, 99CENTS Only Stores opened four,
eight and ten stores, respectively (two, seven and ten stores, respectively, net
of relocated stores). During 1998, 99CENTS Only Stores has opened two stores
(including one relocation) and expects to open at least eleven additional stores
(including one relocation) in Southern California during the remainder of the
year, including its first store in San Diego County. The Company plans to open
new stores over the next several years at a rate of approximately 20% per annum.
The success of 99CENTS Only Stores' expansion strategy is dependent upon many
factors, including identifying suitable markets and sites for new stores,
negotiating leases with acceptable terms, refurbishing stores, appropriately
upgrading its financial and management information systems and controls and
managing its operating expenses. In addition, 99CENTS Only Stores must be able
to continue to hire, train, motivate and retain competent managers and store
personnel. Many of these factors are beyond 99CENTS Only Stores' control. As a
result, there can be no assurance that 99CENTS Only Stores will be able to
achieve its expansion goals. Any failure of 99CENTS Only Stores to achieve its
expansion goals on a timely basis, obtain acceptance in markets in which it
currently has limited or no presence, attract and retain qualified management
and other personnel, appropriately upgrade its financial and management
information systems and controls or manage operating expenses could adversely
affect 99CENTS Only Stores' future operating results and its ability to execute
its business strategy.
 
    There can be no assurance that the opening of new stores will improve the
Company's results of operations. A variety of factors, including store location,
store size, rental terms, the level of store sales and the level of initial
advertising expenditures influence if and when a store becomes profitable.
Assuming 99CENTS Only Stores' planned expansion occurs as anticipated, 99CENTS
Only Stores' store base will include a relatively high proportion of stores with
relatively short operating histories. There can be no assurance that the new
stores will achieve the sales per saleable square foot and store-level operating
margins currently achieved at 99CENTS Only Stores' existing stores. If the new
stores on average fail to achieve these results, 99CENTS Only Stores' planned
expansion could produce a decrease in 99CENTS Only Stores' overall sales per
saleable square foot and store-level operating margins. Increases in the level
of advertising and pre-opening expenses associated with the opening of new
stores could also contribute to a decrease in 99CENTS Only Stores' operating
margins. Finally, the opening of new stores in existing markets has in the past
and may in the future reduce retail sales of existing stores in those markets,
negatively affecting comparable store sales.
 
PENDING ACQUISITIONS
 
    The Company acquired 48% of the capital stock of Universal in November 1997.
In February 1998, the Company announced a proposal to acquire, by an exchange
offer, all of the remaining issued and outstanding shares of Universal not
already held by the Company and to acquire all of the issued and outstanding
shares of Odd's-N-End's (the "Odd's-N-End's Merger"). In March 1998, the Company
and Odd's-N-End's (which is held approximately 41% by Universal) entered into a
definitive merger agreement. The Company is seeking to acquire Universal and
Odd's-N-End's with the expectation that the transactions will enable the Company
to provide a retail outlet for merchandise it acquires at prices other than the
Company's single price point, increase the Company's distribution capabilities,
diversify its geographic presence and to further capitalize on greater volume
discounts in merchandise purchases.
 
                                       14

    Achieving these anticipated benefits depends in part on the efficient,
effective and timely integration of the operations of Universal and
Odd's-N-End's with those of the Company. The combination of these businesses
requires, among other things, integration of the companies' management staffs,
coordination of the companies' sales and marketing efforts, integration and
coordination of the companies' purchasing departments and the identification and
elimination of redundant overhead and under-performing retail stores. Further,
the Company believes that the continued employment of Richard Ennen, President
and Chief Executive Officer of Universal and Odd's-N-End's, is integral to the
successful integration and operation of Universal and Odd's-N-End's following
consummation of the acquisitions. Both the Universal and Odd's-N-End's
acquisitions will require the Company to offer discount general merchandise at
multiple price points, a new strategy for the Company's retail business.
Further, the acquisitions of Universal and Odd's-N-End's expand the Company's
operations into geographic locations outside of Southern California. There can
be no assurance that the Company will be successful in these markets.
 
    Full integration of these businesses will require considerable effort on the
part of the Company's management. During the integration period, it is
anticipated that the Company's accounting staff, operations personnel and other
staff will be required to dedicate considerable time toward integrating the
financial and information systems, management staffs and organizational cultures
of the three geographically separated organizations. There can be no assurance
that the Company will not experience problems associated with the integration or
the integration will proceed efficiently or successfully. Furthermore, even if
the operations of the three companies are ultimately successfully integrated, it
is anticipated that the integration will be accomplished over time and, in the
interim, the combination may have an adverse effect on the Company's business
and results of operations.
 
INABILITY TO MERGE WITH UNIVERSAL
 
    Universal is a Minnesota corporation and is subject to the provisions of
Section 302A.673 of the Minnesota Business Corporation Act ("Section 673 of the
MBCA"). Section 673 of the MBCA provides, with certain exceptions, that a
Minnesota corporation may not engage in any of a broad range of business
combinations, including a merger, with a person, or affiliate or associate of
such person, who is an "interested shareholder" for a period of four years from
the date that person became an interested shareholder unless the transaction
resulting in the person becoming an interested shareholder, or the business
combination, is approved before the person becomes an interested shareholder by
a special committee of the board of directors of the corporation consisting
solely of disinterested directors. An "interested shareholder" is defined as any
person that is (a) the owner of 10% or more of the outstanding voting stock of
the corporation or (b) an affiliate or associate of the corporation and who was
the owner of 10% or more of the outstanding voting stock of the corporation at
any time within the four-year period immediately prior to the date on which it
is sought to be determined whether such person is an interested shareholder.
 
    In November 1997, 99CENTS Only Stores became an "interested shareholder" of
Universal when it acquired shares representing 48% of the Universal Common
Stock. 99CENTS Only Stores' acquisition of the Universal Common Stock, while
unanimously approved by Universal's full board of directors, was not approved by
a separate committee of Universal's board of directors consisting solely of
disinterested directors. Accordingly, upon completion of the Exchange Offer,
99CENTS Only Stores may be unable to acquire by way of merger or other form of
business combination any shares of Universal Common Stock that were not tendered
to 99CENTS Only Stores in the Exchange Offer. As a result, 99CENTS Only Stores
may not be able to acquire 100% of the Universal Common Stock for a period of
four years. Also, depending on the number of shares of Universal Common Stock
acquired pursuant to the Exchange Offer, the Universal Common Stock may no
longer meet the requirements for continued listing on the Nasdaq National Market
and consequently may be delisted. Universal Common Stock is currently registered
under the Exchange Act. Depending on the number of shares of Universal Common
Stock purchased pursuant to the Exchange Offer, the Universal Common Stock might
become eligible for termination of registration
 
                                       15

under the Exchange Act. 99CENTS Only Stores intends to seek termination of
registration of the Universal Common Stock under the Exchange Act as soon after
the completion of the Exchange Offer as the requirements for such termination
are met. Such delisting and termination could materially adversely affect the
market for the Universal Common Stock. In addition, depending on the number of
shares of Universal Common Stock tendered, the Universal Common Stock may no
longer constitute "margin securities" for purposes of the Federal Reserve
Board's margin regulations, in which event the Universal Common Stock could no
longer be used as collateral for margin loans made by brokers. Further, 99CENTS
Only Stores does not currently intend to merge Universal with 99CENTS Only
Stores. Consequently, if the Company's Exchange Offer is successful,
shareholders of Universal who do not tender may have to retain their investment
indefinitely. 99CENTS Only Stores has no current intention to pay dividends on
the Universal Shares.
 
CONCENTRATION OF OPERATIONS
 
    All of the Company's 99CENTS Only Stores are currently located in Southern
California. In addition, the Company's current retail expansion plans anticipate
that new stores will be primarily located in this geographic region.
Consequently, the Company's results of operations and financial condition are
dependent upon general trends in this regional economy. Although the recession
in the Southern California economy in the early 1990s had no material effect on
the Company's results of operations, between 1989 and 1993 a significant decline
in retail spending was recorded in most counties of California, particularly the
greater Los Angeles region. Although retail markets in this region began to
recover and this recovery has continued from 1995 through 1997, there can be no
assurance that this trend will continue or that retail spending will not decline
in the future. In addition, Southern California historically has been vulnerable
to certain natural disasters and other risks, such as earthquakes, fires, floods
and civil disturbance, which at times have disrupted the local economy. These
events pose physical risks to the Company's properties and could adversely
affect the Company's operations. Although the Company maintains standard
property and business interruption insurance, the Company does not maintain
earthquake insurance on its facilities and business.
 
    Following the acquisitions of Universal and Odd's-N-End's, the Company will
have stores clustered in geographic regions in the upper Midwest, upstate New
York and Texas. The upper Midwest, upstate New York and Texas regions have
economic characteristics unique to their particular locale. In addition, unlike
Southern California, extreme winter weather conditions in the Midwest and New
York may cause decreases in retail spending during certain times of the year.
 
DISRUPTIONS IN RECEIVING AND DISTRIBUTION
 
    Substantially all of 99CENTS Only Stores' inventory is shipped or picked up
directly from suppliers and delivered to 99CENTS Only Stores' single warehouse
and distribution facility in Los Angeles County, California, where inventory is
processed and distributed. 99CENTS Only Stores' success depends in large part on
the orderly operation of this receiving and distribution process, which depends,
in turn, on adherence to shipping schedules and effective management of the
warehouse operations. Although management believes that 99CENTS Only Stores'
receiving and distribution process is efficient and well positioned to support
99CENTS Only Stores' expansion plans, there can be no assurance that 99CENTS
Only Stores' has anticipated, or will anticipate, all of the changing demands
its expanding operations will impose on its receiving and distribution system or
that events beyond the control of 99CENTS Only Stores will not result in delays
in the delivery of merchandise to the warehouse or from the warehouse to the
stores. In addition, because 99CENTS Only Stores' receiving and distribution
operations are concentrated at a single location, a fire, earthquake or other
disaster at its warehouse and distribution facility could materially and
adversely affect its business and results of operations. Such a disaster could
be particularly damaging because much of the Company's inventory is purchased as
close-outs and special-situations and could not be readily replaced for its
carrying value, if at all. Although 99CENTS Only Stores
 
                                       16

maintains standard property and business interruption insurance, 99CENTS Only
Stores does not maintain earthquake insurance on its facilities and business.
 
SUPPLIER RELATIONSHIPS; AVAILABILITY OF CLOSE-OUT AND SPECIAL-SITUATION
  MERCHANDISE
 
    99CENTS Only Stores' success depends in large part upon its ability to
locate and purchase quality close-out and special-situation merchandise at
attractive prices in order to maintain a mix of name-brand and other merchandise
at the 99CENTS price point. There can be no assurance that such merchandise will
continue to be available in the future. Further, there can be no assurance that
such merchandise will be available in quantities necessary to accommodate
99CENTS Only Stores' expansion strategy.
 
    99CENTS Only Stores has no continuing contracts for the purchase of
merchandise and must continuously seek out buying opportunities from both its
existing suppliers and new sources, for which it competes with other
wholesalers, discount and deep-discount chains, mass merchandisers, food
markets, drug chains, club stores, other retailers and various small
privately-held companies and individuals. Although 99CENTS Only Stores is not
dependent on any single supplier or group of suppliers, 99CENTS Only Stores'
results of operations could be adversely affected by a disruption in the
availability of merchandise. Further, although the Company believes it has
longstanding relationships with its suppliers and is competitively positioned to
continue to seek new sources, there can be no assurance that the Company will be
successful in maintaining an adequate supply of quality merchandise at
attractive prices.
 
    99CENTS Only Stores' suppliers sometimes restrict the advertising, promotion
and method of distribution of the merchandise sold to 99CENTS Only Stores. These
restrictions may make it more difficult for 99CENTS Only Stores to resell
quickly sell items in its inventory that are subject to such restrictions.
 
LARGE VOLUME PURCHASES; INVENTORY CONCENTRATION
 
    99CENTS Only Stores takes advantage of large volume purchases, close-outs
and other special-situations in order to obtain inventory at favorable prices.
As a result, 99CENTS Only Stores typically maintains inventory at levels that
are generally higher than other discount retailers. At December 31, 1995, 1996
and 1997, 99CENTS Only Stores had net inventory recorded of $34.3 million, $36.9
million and $43.1 million, respectively.
 
    99CENTS Only Stores periodically reviews the net realizable value of its
inventory and makes adjustments to its carrying value when appropriate. While
the current carrying value of 99CENTS Only Stores' inventory reflects
management's belief that 99CENTS Only Stores will realize the net values
recorded on 99CENTS Only Stores' balance sheet, there can be no assurance that
99CENTS Only Stores will be able to do so. A sale by 99CENTS Only Stores of any
material portion of its inventory at an amount less than its carrying value or a
determination to write down any material portion of 99CENTS Only Stores'
inventory will have a material adverse impact on 99CENTS Only Stores' cost of
sales, gross profits, operating income and net income during the period in which
such event or events occur.
 
UNIVERSAL'S HISTORY OF LOSSES AND ACCUMULATED DEFICIT; GOING CONCERN
 
    Universal has incurred net losses in each of the last two fiscal years,
including net losses of approximately $11.9 million for the fiscal year ended
December 31, 1997, and at such date had an accumulated deficit of approximately
$18.6 million. Arthur Andersen LLP, Universal's independent public accountants,
expressed substantial doubt about Universal's ability to continue as a going
concern in their report for the fiscal year ended December 31, 1997. If the
Exchange Offer is not consummated, there is no assurance that Universal will
generate significant revenue or become profitable on a sustained basis, if at
all.
 
                                       17

COMPETITION
 
    99CENTS Only Stores faces competition in both the acquisition of inventory
and sale of merchandise from other wholesalers, discount and deep-discount
stores, single price point merchandisers, mass merchandisers, food markets, drug
chains, club stores and other retailers. Industry competitors also include a
large number of privately held companies and individuals. In some instances
these competitors are also customers of 99CENTS Only Stores' Bargain Wholesale
division. There is increasing competition with other wholesalers and retailers,
including other deep-discount retailers, for the purchase of quality close-out
and other special-situation merchandise. Some of these competitors have
substantially greater financial resources and buying power than 99CENTS Only
Stores. 99CENTS Only Stores' ability to compete will depend on many factors
including the success of its purchase and resale of such merchandise at lower
prices than the competition. 99CENTS Only Stores may face intense competition in
the future from new entrants in the deep-discount retail industry, among others,
that could have an adverse effect on 99CENTS Only Stores' business and results
of operations.
 
ADVERSE ECONOMIC FACTORS; CHANGE IN MINIMUM WAGE
 
    99CENTS Only Stores' ability to provide quality merchandise at its 99CENTS
price point is subject to certain economic factors beyond 99CENTS Only Stores'
control, including inflation, other operating costs (such as employee health
care costs or prevailing wage levels), consumer confidence and general economic
conditions. There can be no assurance that such factors will remain favorable
or, in particular, that health care costs or 99CENTS Only Stores' wages will
remain at current levels. Currently, none of the Company's employees is party to
a collective bargaining agreement. The minimum wage in California was increased
in March 1997 from $4.75 to $5.00 per hour, in September 1997 to $5.15 per hour
and again in March 1998 to $5.75 per hour. Further, legislation has been
introduced in California to increase the minimum wage to $6.75 per hour as of
January 1, 1999. The federal minimum wage increased in September 1997 to $5.15
per hour and a bill has been proposed in Congress to increase the minimum wage
to $6.15 per hour on September 1, 1999, and to $6.65 per hour on September 1,
2000, with adjustments on such date and each September 1 thereafter to reflect
increases in the Consumer Price Index for All Urban Consumers during the most
recent 12-month period for which data are available. Significant increases in
health care costs, wages or other operating costs or a declining consumer
confidence or general economic conditions could have a material adverse effect
on the Company's business and results of operations, especially given
constraints on the Company's ability to pass on any incremental costs through
price increases.
 
INTERNATIONAL SALES AND PURCHASES
 
    Although international sales have historically not been material to 99CENTS
Only Stores' consolidated net sales, they have contributed to growth in Bargain
Wholesale's net sales. In addition, some of the inventory purchased by 99CENTS
Only Stores is manufactured outside the United States. International
transactions may be subject to political and economic risks, including political
instability, currency controls, exchange rate fluctuations, and changes in
import/export regulations, tariff and freight rates. In addition, various forms
of protectionist trade legislation have been proposed in the United States and
certain other countries. Any resulting changes in current tariff structures or
other trade and monetary policies could adversely affect 99CENTS Only Stores'
international operations. Political and economic factors have been identified by
99CENTS Only Stores' with respect to certain of the markets in which it
competes. There can be no assurance that these factors will not result in the
reduction of purchases of 99CENTS Only Stores' products.
 
AFFILIATE TRANSACTIONS
 
    As of March 31, 1998, 99CENTS Only Stores leased 13 of its 55 store
locations and a parking lot associated with one of these stores from David Gold,
the Company's Chief Executive Officer, and certain other members of the Gold
family and their affiliates (together, the "Gold Family"). Annual rental
 
                                       18

expense for the facilities owned by the Gold Family was approximately $1.6
million, $1.8 million and $2.0 million in 1995, 1996 and 1997, respectively.
99CENTS Only Stores believes that these leases and contracts are no less
favorable to 99CENTS Only Stores than those an unrelated party would have
provided after arm's-length negotiations. It is the Company's current policy not
to enter into real estate transactions with affiliated parties, except with
respect to the renewal or modification of existing leases and occasions where
such transactions are determined to be in the best interests of 99CENTS Only
Stores. Moreover, all real estate transactions between 99CENTS Only Stores and
affiliated parties require the unanimous approval of the independent directors
on 99CENTS Only Stores' Board of Directors and a determination by such
independent directors that such transactions are the equivalent of a negotiated
arm's-length transaction with a third party. There can be no guarantee that
99CENTS Only Stores and the Gold Family will be able to agree on renewal terms
for the properties currently leased by 99CENTS Only Stores from the Gold Family,
or, if such terms are agreed to, that the independent directors on the Board of
Directors will approve such terms. The failure of 99CENTS Only Stores to renew a
lease will result in 99CENTS Only Stores having to relocate or close the store
associated with such lease; one or more such relocations or closures will be
costly and may have a material adverse effect on 99CENTS Only Stores' business
and results of operations.
 
DEPENDENCE ON KEY MANAGEMENT
 
    99CENTS Only Stores' success will continue to depend to a significant extent
on David Gold, the Company's Chief Executive Officer. The Company is also
dependent on the continued service of its executive officers and other key
management, particularly Helen Pipkin, its Senior Vice President of Wholesale
Operations. 99CENTS Only Stores does not have an employment contract with any of
its executive officers and does not maintain "key man" life insurance on any of
its executive officers. As 99CENTS Only Stores continues to grow, it will
continue to hire, appoint or otherwise change senior managers and other key
executives. There can be no assurance that 99CENTS Only Stores will be able to
retain is executive officers and key personnel or attract additional qualified
members to management in the future.
 
SEASONALITY AND QUARTERLY FLUCTUATIONS
 
    Historically, 99CENTS Only Stores' highest net sales and operating income
have occurred during the fourth quarter, which includes the Christmas and
Halloween selling seasons. During 1995, 1996 and 1997, approximately 29.3%,
28.8% and 29.2%, respectively, of 99CENTS Only Stores' net sales and
approximately 33.0%, 32.6% and 32.3%, respectively, of its operating income were
generated during the fourth quarter. Further, the operations of Universal and
Odd's-N-End's are more dependent upon results in the fourth quarter and even
without the acquisition of Universal, the Company's investment in Universal is
expected to further increase the impact of fourth quarter sales on the Company's
results of operations. Accordingly, any adverse trend in net sales for the
fourth quarter could have a material adverse effect upon 99CENTS Only Stores'
profitability and adversely affect 99CENTS Only Stores' results of operations
for the entire year.
 
    In addition to seasonality, 99CENTS Only Stores' results of operations may
fluctuate from quarter to quarter as a result of the number and timing of sales
contributed by new stores, the level of advertising and pre-opening expenses
associated with the opening of new stores and the integration of new stores into
the operations of 99CENTS Only Stores, as well as other factors.
 
MANAGEMENT INFORMATION SYSTEMS; YEAR 2000 COMPLIANCE
 
    The Company's business is currently supported by a standard accounting and
financial reporting system utilizing a PC-based local area network (LAN) and a
separate partially customized inventory control system processed on a
Hewlett-Packard RISC-based computer. The Company believes that its accounting
and management information system and inventory control system adequately
provide for its
 
                                       19

current needs. The Company intends to continue to update and enhance its systems
in order to improve capabilities and provide for planned growth. If the Company
should experience faster than anticipated growth, the Company may be required to
install a new management information or inventory control system or undergo a
significant modification of its current systems to accommodate a larger
business.
 
    The Company has completed an assessment and determined that it will be
required to modify or replace portions of its software so that its computer
systems will function properly with respect to dates in the year 2000 and
thereafter. Although the year 2000 project is estimated to be completed in
mid-1999 and is not anticipated to have a material effect on results of
operations, there can be no assurance that the Company will not encounter
unanticipated problems in modifying its systems or that there will not be delays
in completing the project. Any difficulties in modifying its systems could
impact the Company's ability to communicate with and effectively make purchases
from its suppliers.
 
ENVIRONMENTAL MATTERS
 
    Under various Federal, state and local environmental laws and regulations, a
current or previous owner or occupant of real property may become liable for the
costs of removal or remediation of hazardous substances at such real property.
Such laws and regulations often impose liability without regard to fault.
99CENTS Only Stores currently leases all but three of its stores, as well as its
warehouse and distribution facility (where its executive offices are located).
The Company currently intends to exercise an option to purchase the warehouse
and distribution facility in December 2000, the end of the lease term. 99CENTS
Only Stores could be held liable for the costs of remedial actions with respect
to hazardous substances on such properties under the terms of the governing
lease and/or governing law. In addition, 99CENTS Only Stores operates one
underground diesel storage tank and one above-ground propane storage tank at its
warehouse and distribution facility. Although 99CENTS Only Stores has not been
notified of, and is not otherwise aware of, any current environmental liability,
claim or non-compliance, there can be no assurance that 99CENTS Only Stores will
not be required to incur remediation or other costs in the future in connection
with its leased properties or its storage tanks.
 
    In the ordinary course of its business, 99CENTS Only Stores from time to
time handles or disposes of ordinary household products that are classified as
hazardous materials under various federal, state and local environmental laws
and regulations. 99CENTS Only Stores has adopted policies regarding the handling
and disposal of these products, and has implemented a training program for
employees on hazardous material handling and disposal. There can be no
assurance, however, that such policies or training will be successful in
assisting 99CENTS Only Stores in avoiding violations of environmental laws and
regulations relating to the handling and disposal of such products in the
future.
 
ANTI-TAKEOVER EFFECT; CONTROL BY EXISTING SHAREHOLDERS
 
    A number of provisions of 99CENTS Only Stores' Articles of Incorporation and
Bylaws and certain California laws and regulations pertaining to matters of
corporate governance (including the ability to issue preferred stock without
shareholder approval) may be deemed to have and may have the effect of making
more difficult, and thereby discouraging, a merger, tender offer, proxy contest
or assumption of control and change of incumbent management, even when
shareholders other than 99CENTS Only Stores' principal shareholders consider
such a transaction to be in their best interest. Accordingly, shareholders may
be deprived of an opportunity to sell their shares at a substantial premium over
the market price of the shares.
 
    As of December 31, 1997, David Gold, members of his immediate family and
certain of their respective affiliates beneficially owned 11,881,246 shares or
approximately 64% of the voting stock of 99CENTS Only Stores. This ownership
position enables these owners to control 99CENTS Only Stores' policies and to
prevent a change in control of 99CENTS Only Stores. If all of the Universal
shareholders
 
                                       20

were to exchange their Universal Common Stock for 99CENTS Only Stores Common
Stock, the percentage of voting stock of 99CENTS Only Stores beneficially owned
by David Gold, his family and their affiliates would be reduced to    %.
Further, if the public offering of 99CENTS Only Stores Common Stock is
consummated as anticipated, the percentage of voting stock beneficially owned by
David Gold, his family and their affiliates would be reduced to    %.
 
VOLATILITY OF STOCK PRICE
 
    The market price of 99CENTS Only Stores' Common Stock has risen
substantially since the Company's initial public offering on May 23, 1996.
Trading prices for the 99CENTS Only Stores' Common Stock could be subject to
significant fluctuations due to many factors, including the depth of the market
for the Common Stock, investor perception of the Company, fluctuations in the
Company's operating results and changes in conditions or trends in the Company's
industry or in the industries of any of the Company's significant clients,
changes in any securities analysts' estimates of the Company's future
performance or general market conditions. In addition, future sales of
substantial amounts of Common Stock by existing shareholders could also
adversely affect the prevailing market price of the Common Stock. See
"SUMMARY--Comparative Market Price Data and Dividend Information."
 
LIMITED TRADING VOLUME
 
    The purchase of Universal Common Stock pursuant to the Exchange Offer will
reduce the number of holders of Universal Common Stock and the number of shares
of Universal Common Stock that might otherwise trade publicly and could
adversely affect the liquidity and market value of the remaining shares of
Universal Common Stock held by the public. The Universal Common Stock is
currently traded on the Nasdaq National Market. Depending upon the number of
shares of Universal Common Stock purchased pursuant to the Exchange Offer, the
Universal Common Stock may no longer meet the requirements for continued listing
on the Nasdaq National Market and may be delisted and, in such event, the market
for and trading in Universal Common Stock could be adversely affected. In
addition, 99CENTS Only Stores intends to seek termination of the registration of
the Universal Common Stock under the Exchange Act as soon after completion of
the Exchange Offer as the requirements for such termination are met. Such
termination could have a material adverse effect on the market for Universal
Common Stock. See "THE EXCHANGE OFFER--Consequences to Non-tendering Holders of
Universal Common Stock."
 
INFLATION
 
    The Company's ability to provide quality merchandise at the 99CENTS price
point is subject to certain economic factors which are beyond the Company's
control, including inflation. Inflation could have a material adverse effect on
the Company's business and results of operations, especially given the
constraints on the Company to pass on any incremental costs due to price
increases or other factors. The Company believes that it will be able to respond
to ordinary price increases resulting from inflationary pressures by adjusting
the number of items sold at the single price point (e.g., two items for 99CENTS
instead of three items for 99CENTS) and by changing its selection of
merchandise. Nevertheless, a sustained trend of significantly increased
inflationary pressure could require the Company to abandon its single price
point of 99CENTS per item, which could have a material adverse effect on the
Company's business and results of operations.
 
                                       21

                           COMPARATIVE PER SHARE DATA
 
    The following table sets forth historical per share data for 99CENTS Only
Stores and Universal, unaudited pro forma per share data for 99CENTS Only Stores
giving effect to the Exchange Offer and equivalent unaudited pro forma per share
data for Universal. The information presented should be read in conjunction with
the historical financial statements and notes thereto of 99CENTS Only Stores
incorporated by reference in this Proxy Statement/Prospectus and the historical
financial statements and related notes thereto of Universal and the unaudited
pro forma condensed combined financial information and related notes thereto,
included in this Proxy Statement/Prospectus. Pro forma and equivalent pro forma
per share data reflect the combined results of 99CENTS Only Stores and
Universal, after giving effect to the Exchange Offer as if it had occurred on
December 31, 1997, in the case of book value data, and on January 1, 1997, in
the case of statements of operations data. The pro forma per share data is not
necessarily indicative of actual results had the Exchange Offer occurred on such
dates or of future expected results. See "INCORPORATION OF DOCUMENTS BY
REFERENCE" and "UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION."
 


                                                                                         HISTORICAL
                                                                                  ------------------------
                                                                                   99 CENTS
                                                                                     ONLY                    PRO FORMA
                                                                                    STORES      UNIVERSAL    COMBINED
                                                                                  -----------  -----------  -----------
                                                                                                   
Income (loss) per common share from continuing operations--Basic................   $    1.02    $   (1.35)   $    0.78
Income (loss) per common share from continuing operations--Diluted..............        1.01        (1.35)        0.77
Cash dividends declared per common share........................................      --           --           --
Book value per common share at period end.......................................        5.18         0.92         5.67

 
                                       22

          UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION
 
    The following information sets forth the unaudited pro forma condensed
combined financial information of the Company for the year ended December 31,
1997. The Unaudited Pro Forma Condensed Combined Statements of Operations for
the year ended December 31, 1997 gives effect to the acquisitions of Universal
and Odd's-N-End's, which is included in Universal's historical financial
statements, as if they had occurred on January 1, 1997. The Unaudited Pro Forma
Condensed Combined Balance Sheet as of December 31, 1997 gives effect to the
acquisitions as if they had occurred on December 31, 1997.
 
    The historical balances represent the financial position and results of
operations for each company and were derived from the respective financial
statements filed with the Securities and Exchange Commission for the indicated
period. The historical results of Universal are for continuing results of
operations and exclude losses on discontinued operations of approximately $4.5
million. The acquisitions will be accounted for as purchase transactions. The
estimated total purchase price plus transaction costs will be allocated to the
fair value of the assets and liabilities acquired. The excess of the purchase
price over the fair value of net assets acquired will be allocated to goodwill
and as such amortized on a straightline basis over a 30-year period. The
preliminary amount allocated to goodwill is estimated to be $7.0 million
(resulting from both the Company's initial purchase of 48% of Universal in
November 1997 and the Exchange Offer) but may vary depending on the actual
closing price of the 99CENTS Only Stores' Common Stock on the effective date of
closing. To the extent that the market price of 99CENTS Only Stores' Common
Stock on the effective date of closing is different than $35 1/4 per share, the
closing sales price per share on April 8, 1998 the amount of the purchase price
and the corresponding amount charged to goodwill would change. Pro forma
adjustments for Universal and Odd's-N-End's include elimination of the accounts
of Odd's-N-End's which have been included in the Universal financial statements.
 
    The pro forma financial information presented does not purport to be
indicative of the financial position or operating results which would have been
achieved had the transactions described above taken place at the dates indicated
and are not necessarily indicative of the Company's financial position or
results of operations for any future date or period.
 
                                       22

             PRO FORMA CONDENSED COMBINED STATEMENTS OF OPERATIONS
                 (AMOUNTS IN THOUSANDS, EXCEPT PER SHARE DATA)
 


                                                                       FOR THE YEAR ENDED DECEMBER 31, 1997
                                                               ----------------------------------------------------
                                                                       HISTORICAL
                                                               ---------------------------         PRO FORMA
                                                                99CENTS ONLY                -----------------------
                                                                   STORES       UNIVERSAL   ADJUSTMENT    COMBINED
                                                               --------------  -----------  -----------  ----------
                                                                                   (UNAUDITED)
                                                                                             
Net Sales:
  Retail.....................................................    $  186,024     $  68,705    $  --       $  254,729
  Wholesale..................................................        44,831        --           --           44,831
                                                               --------------  -----------  -----------  ----------
    Total....................................................       230,855        68,705       --          299,560
Cost of sales................................................       146,797        39,229       --          186,026
                                                               --------------  -----------  -----------  ----------
Gross profit.................................................        84,058        29,476       --          113,534
Selling, general and administrative expenses.................        52,839        35,483          234(a)     88,556
                                                               --------------  -----------  -----------  ----------
  Operating income (loss) (e)................................        31,219        (6,007)        (234)      24,978
                                                               --------------  -----------  -----------  ----------
Other (income) expense:
  Interest income............................................        (1,613)          (27)         693(b)       (947)
  Interest expense...........................................           758         1,399       (1,399)(b)        758
                                                               --------------  -----------  -----------  ----------
                                                                       (855)        1,372         (706)        (189)
                                                               --------------  -----------  -----------  ----------
  Income (loss) before provision for income taxes(e).........        32,074        (7,379)         472       25,167
Provision for income taxes:..................................        13,124        --           (2,729)(c)     10,395
                                                               --------------  -----------  -----------  ----------
Net income (loss) (e)........................................    $   18,950     $  (7,379)   $   3,201   $   14,772
                                                               --------------  -----------  -----------  ----------
                                                               --------------  -----------  -----------  ----------
Earnings per common share:
  Basic......................................................    $     1.02                              $     0.78
  Diluted....................................................          1.01                                    0.77
Weighted average number of common shares outstanding:
  Basic......................................................        18,542                        306(d)     18,848
  Diluted....................................................        18,756                        306(d)     19,062

 
- ------------------------
 
(a) Represents the amortization of estimated goodwill over a 30-year period
    based on a December 31, 1997 acquisition date.
 
(b) Represents the elimination of Universal's interest expense based on the
    Company paying off all of Universal's debt with excess cash and the
    reduction in the interest income of the Company as a result of using cash
    that would otherwise be invested in marketable securities.
 
(c) Represents the net tax effect of the pro forma adjustments and the loss of
    Universal.
 
(d) Represents the estimated increase in the number of shares to acquire the
    remaining 52% ownership of Universal.
 
(e) The accompanying Pro Forma Condensed Combined Statements of Operations do
    not give effect to certain other efficiencies and synergies available by
    operating on a cooperative basis which include economies of scale in
    purchasing, freight, retail expenses, insurance, marketing, advertising,
    human resources and administration. Management estimates that, had the
    companies been combined, the cost savings during the year following the
    acquisition would have been approximately $5.0 million. However, there can
    be no assurances that all of these savings could, or would, be realized.
 
                                       23

                   PRO FORMA CONDENSED COMBINED BALANCE SHEET
                             (AMOUNTS IN THOUSANDS)
 


                                                                                DECEMBER 31, 1997
                                                               ----------------------------------------------------
                                                                       HISTORICAL
                                                               ---------------------------         PRO FORMA
                                                                99CENTS ONLY                -----------------------
                                                                   STORES       UNIVERSAL   ADJUSTMENT    COMBINED
                                                               --------------  -----------  -----------  ----------
                                                                                   (UNAUDITED)
                                                                                             
ASSETS
Current Assets:
  Cash.......................................................    $      882     $   1,053    $    (830)(a) $    1,105
  Short-term investments.....................................        32,584        --           --           32,584
  Accounts receivable, net...................................         1,510           312       --            1,822
  Inventory..................................................        43,114        18,901         (292)(b)     61,723
  Other current assets.......................................           673         2,105       --            2,778
                                                               --------------  -----------  -----------  ----------
    Total current assets.....................................        78,763        22,371       (1,122)     100,012
  Property and equipment, net................................        29,441         8,880       --           38,321
  Deferred taxes.............................................         5,947        --                         5,947
  Investment in Universal International, Inc.................         3,708        --           (3,708)      --
  Goodwill...................................................        --            --           10,781(c)      7,010
                                                                                                   830(c)
                                                                                                   292(c)
                                                                                                (4,893)(c)
  Other assets...............................................         1,584           137       --            1,721
                                                               --------------  -----------  -----------  ----------
                                                                 $  119,443     $  31,388    $   2,180   $  153,011
                                                               --------------  -----------  -----------  ----------
                                                               --------------  -----------  -----------  ----------
 
LIABILITIES AND SHAREHOLDERS' EQUITY
Current Liabilities:
  Revolving line of credit...................................    $   --         $   9,270    $  --       $    9,270
  Current portion of long term debt..........................        --               634       --              634
  Current portion of capital lease obligation................           704        --           --              704
  Accounts payable...........................................         5,534         7,014       --           12,548
  Accrued expenses...........................................         5,341         4,348                     9,689
                                                               --------------  -----------  -----------  ----------
    Total current liabilities................................        11,579        21,266       --           32,845
Long Term Liabilities:
  Long term debt, net........................................        --             1,494       --            1,494
  Capital lease obligation...................................         8,005        --           --            8,005
  Interest on capital lease obligation.......................         2,075        --           --            2,075
  Deferred rent..............................................         1,476        --           --            1,476
  Deferred taxes.............................................        --                27       --               27
                                                               --------------  -----------  -----------  ----------
    Total long term liabilities..............................        11,556         1,521       --           13,077
Shareholders' Equity:
  Common Stock, 40,000,000 authorized, 18,578,759                    66,207           470       10,311(a)     76,988
    outstanding..............................................
  Additional paid-in-capital.................................        --            26,692      (26,692)(d)     --
  Retained earnings (deficit)................................        30,101       (18,561)      18,561(d)     30,101
                                                               --------------  -----------  -----------  ----------
    Total shareholders equity................................        96,308         8,601        2,180      107,089
                                                               --------------  -----------  -----------  ----------
                                                                 $  119,443     $  31,388    $   2,180   $  153,011
                                                               --------------  -----------  -----------  ----------
                                                               --------------  -----------  -----------  ----------

 
- ------------------------
 
(a) Represents the issuance of approximately 305,800 shares of the Company's
    Common Stock for the 52% of Universal not owned by the Company and payment
    of $830,000 for the remaining 2.8 million
 
                                       24

    Odd's-N-End's shares not held by Universal. Odd's-N-End's is included in the
    consolidated historical balances of Universal.
 
(b) Represents the required reduction in inventory due to the elimination of
    intercompany profit recorded in inventory shipped to Universal by the
    Company as part of the initial acquisition of 48% of Universal stock.
 
(c) To record goodwill associated with the excess of the aggregate purchase
    price for 100% of Universal and Odd's-N-End's (including the original $3.7
    million investment for 48% of Universal, the estimated purchase price of
    $10.8 mllion of Company Common Stock for the remaining 52% of Universal
    common stock and the payment of $830,000 for the remaining 2.8 million
    shares of Odd's-N-End's) over the net asset value of Universal (net of the
    required adjustment to eliminate intercompany profit in inventory as
    described in (b) above) as if the transaction had occurred at December 31,
    1997 at the Common Stock price as set forth on the cover of this Prospectus.
 
(d) Represents the elimination of additional paid in capital and related
    retained deficit of Universal and the original investment in Universal.
 
                                       25

              BACKGROUND OF THE EXCHANGE OFFER AND RELATED MATTERS
 
RELATIONSHIP BETWEEN 99CENTS ONLY STORES AND UNIVERSAL
 
    In January 1997, Mark Ravich, the former Chief Executive Officer of
Universal, and his father, Norman Ravich, met with David Gold, Chairman and
Chief Executive Officer of 99CENTS Only Stores. Following the meeting, Mark
Ravich sent a letter to David Gold dated January 20, 1997 about the possibility
of a relationship between Universal and 99CENTS Only Stores. Mark Ravich
expressed in the letter Universal's need for access to additional capital and
additional sources of product. No substantive discussions regarding a possible
transaction between the parties occurred until June 1997.
 
    In early June 1997, Eric Schiffer, Senior Vice President of Finance and
Operations of 99CENTS Only Stores met with Mark Ravich to discuss a potential
business relationship. Following that meeting, Mark Ravich, by letter dated June
30, 1997, proposed another possible transaction for the two companies which
would require a smaller investment by 99CENTS Only Stores in Universal, with
certain board representation and a supply agreement between 99CENTS Only Stores
and Universal. Mark Ravich explained in the letter that Universal needed
approximately $3 million to enable it to open new stores and improve the mix of
merchandise in its stores. Mark Ravich proposed that 99CENTS Only Stores acquire
19.9% of the common stock of Universal and become a supplier of dollar
merchandise to the Universal stores.
 
    Discussions continued to evolve throughout the summer, and by letter dated
August 15, 1997 Mark Ravich provided further information about Universal to
99CENTS Only Stores for a potentially larger investment. Mark Ravich expressed
in the letter Universal's determination that in order to assure itself of
uninterrupted product flow through the holiday season, it would need to reach
agreement with a potential investor quickly.
 
    Conversations continued through the early fall and in early October Mark
Ravich contacted David Gold to propose that 99CENTS Only Stores make a $5
million investment in Universal for approximately 48% of Universal's outstanding
Common Stock. In response to this proposal, David Gold and Sherry Gold, Bargain
Wholesale's cash and carry operations manager, visited Universal's offices in
Minnesota to meet with Mark Ravich and other key members of management.
Following this visit, later in October during a telephone conference call,
99CENTS Only Stores proposed an investment of $4,000,000 for approximately 48%
of the Common Stock of Universal. Universal accepted the proposal subject to
negotiation of definitive agreements. Following the conference call, 99CENTS
Only Stores conducted a due diligence investigation of Universal.
 
    On October 15, 1997, at a special meeting, the Board of 99CENTS Only Stores
met to discuss the proposed investment in Universal. Following a review of the
status of discussions regarding the potential transaction with Universal, and
after consulting 99CENTS Only Stores' legal advisors, and learning the results
of the due diligence investigation, it was the consensus of the Board of 99CENTS
Only Stores that management should try to negotiate an acceptable stock purchase
agreement with Universal.
 
    On October 21, 1997, a draft of the Stock Purchase Agreement was circulated
by 99CENTS Only Stores to Universal, and thereafter, Universal and 99CENTS Only
Stores and their respective legal advisors negotiated the terms of the Stock
Purchase Agreement. The parties continued their due diligence reviews.
 
    Also on October 21, 1997, the Board of Directors of 99CENTS Only Stores held
a regular meeting at which the progress of the Universal transaction was
generally discussed.
 
    On November 3, 1997, the Board of 99CENTS Only Stores held a special meeting
to review the status of negotiations. After discussing the results of the due
diligence investigation, the price for the Universal Common Stock and the draft
Stock Purchase Agreement, the Board authorized management to enter into the
Stock Purchase Agreement.
 
                                       26

    On November 11, 1997, 99CENTS Only Stores and Universal executed the Stock
Purchase Agreement and on November 17, 1997, 99CENTS Only Stores consummated the
acquisition (the "November 17 Acquisition") of 4,500,000 shares of Universal
Common Stock from Universal for a purchase price of $4,000,000, comprised of
$2,000,000 in cash and $2,000,000 evidenced by a credit established on the books
and records of 99CENTS Only Stores against which Universal could apply the
purchase price of merchandise purchased by Universal from 99CENTS Only Stores at
99CENTS Only Stores customary wholesale prices or as otherwise mutually agreed.
As part of the November 17 Acquisition, Universal granted 99CENTS Only Stores
certain registration rights with respect to the 4,500,000 shares of Universal
Common Stock.
 
    In addition, Universal, 99CENTS Only Stores and Mark Ravich, the former
Chief Executive Officer of Universal, entered into a Shareholders Agreement (the
"Shareholders Agreement") providing that as long as 99CENTS Only Stores owns at
least 20% of the shares acquired in the November 17 Acquisition, Universal would
nominate and recommend to its shareholders that they elect designees of 99CENTS
Only Stores to the Board of Directors of Universal in such number that at all
times 99CENTS Only Stores' designees constitute at least one member less than a
majority of the members of the Board of Directors of Universal. As long as Mark
Ravich owns at least 4% of the outstanding shares of Universal Common Stock and
consents to serving, Universal agreed to nominate and recommend to its
shareholders that they elect Mark Ravich to the Board of Directors of Universal.
Mark Ravich agreed to vote his shares of Universal Common Stock in favor of
electing the nominees of 99CENTS Only Stores to the Board of Directors of
Universal and 99CENTS Only Stores agreed to vote its shares of Universal Common
Stock in favor of electing Mark Ravich to the Board of Directors of Universal.
In addition, Mark Ravich agreed, subject to certain conditions, if requested by
99CENTS Only Stores, to serve as a director of Universal for at least two
additional years following the November 17 Acquisition.
 
DISCUSSIONS REGARDING THE EXCHANGE OFFER
 
    Since the November 17 Acquisition, 99CENTS Only Stores has provided
merchandise to Universal above the initial $2 million merchandise credit which,
as of March 31, 1998, approximated $1.4 million. In January 1998, the Board of
99CENTS Only Stores began reviewing its ownership interest in Universal.
Throughout January, management of 99CENTS Only Stores discussed with Universal
the needs of Universal and its options with respect to its investment in
Universal. The Board of Directors and management of 99CENTS Only Stores
continued to evaluate alternatives with respect to the Universal Common Stock,
including an acquisition of Universal, a sale of Universal or, possibly, a
bankruptcy of Universal.
 
    Also during the course of January, management of 99CENTS Only Stores began
working with management of Universal to implement new purchasing procedures and
a new merchandising program that places greater emphasis on consumables and
focuses on attractive, convenient store layouts. On January 31, 1998, at a
regular meeting with the Board of Directors of Universal at which Jeff Gold,
Howard Gold and Andy Farina, as 99CENTS Only Stores's designees, were present,
Richard Ennen reported that the initial results of the remerchandising program
were very positive. Also at this meeting, Mark Ravich resigned as Chief
Executive Officer to become Chairman of the Board and Richard Ennen was
appointed Chief Executive Officer.
 
    In February 1998, the Board of Directors of 99CENTS Only Stores contacted
its legal and financial advisors for assistance in analyzing methods for
protecting 99CENTS Only Stores' level of ownership of Universal.
 
    On February 3, 1998, at a regular meeting of the Board of 99CENTS Only
Stores, Andy Farina and David Gold reported to the Board on the results of the
Universal Board meeting, after which there was substantial discussion. Mr.
Marvin Holen, a member of the Board, raised the possibility of an acquisition of
100% of the remaining outstanding shares of Universal through an exchange or
tender offer of shares of
 
                                       27

99CENTS Only Stores Common Stock for Universal Common Stock. There was a general
discussion concerning the proposed transaction, although no consensus was
reached.
 
    On Friday, February 6, 1998, members of management of 99CENTS Only Stores
and the Board of Directors met with representatives of Troop Meisinger Steuber &
Pasich, LLP, outside special counsel to 99CENTS Only Stores ("Troop Meisinger"),
to discuss plans for 99CENTS Only Stores' investment in Universal.
Representatives of Troop Meisinger explained the possible structures for a
transaction with Universal and the need, in any transaction, for a fairness
option from a reputable investment banking firm. Based on conversations during
that meeting, management was authorized to contact Houlihan Lokey for the
purposes of possibly providing a fairness opinion if the Board of Directors
decided to further consider an acquisition of Universal.
 
    On Thursday, February 12, 1998, a Board of Directors meeting was held and
representatives of Troop Meisinger and Houlihan Lokey attended the meeting. The
Board was advised by Troop Meisinger of its options with respect to its
investment in Universal. In addition, at the Board's request, Houlihan Lokey
addressed certain financial considerations with respect to 99CENTS Only Stores'
investment in Universal. The Board considered the effects of making no change to
its investment, the possibility of a bankruptcy of Universal without the
continued financial support of 99CENTS Only Stores, the possibility of an
acquisition of Universal via merger, tender offer for cash and exchange offer
and the potential transaction costs and timing of each alternative. The Board
members expressed their desire to preserve cash and to effect any type of
acquisition through the use of 99CENTS Only Stores' stock and determined that if
the Board chose to proceed, that an exchange offer directly to the shareholders
of Universal probably would be the most efficient and cost-effective transaction
structure. The Board members discussed with Houlihan Lokey the experience of
Houlihan Lokey in transactions of the type proposed by 99CENTS Only Stores, and
the methodology Houlihan Lokey would expect to employ in evaluating the fairness
from a financial point of view of the Exchange Consideration to be received by
Universal shareholders in any proposal that 99CENTS Only Stores might make. At
the end of the meeting, and without having discussed a price to offer to the
Universal shareholders, Houlihan Lokey was retained to proceed to determine a
range of prices which would be fair from a financial point of view to the
shareholders of Universal (other than 99CENTS Only Stores). Houlihan Lokey
reported that they would be prepared to give a preliminary opinion on February
16. Troop Meisinger was directed to begin preparing documents to structure a
likely exchange offer.
 
    On Friday, February 13, 1998, various members of management of 99CENTS Only
Stores contacted Richard Ennen, President of Universal, to discuss the
possibility of an acquisition of Universal.
 
    On Sunday, February 15, 1998, David Gold telephoned Mark Ravich, the former
chief executive officer of Universal and a member of Universal's Board, and
Norman Ravich, the founder of Universal, both of whom are significant
shareholders of Universal, to set up a conference call for Monday, February 16,
1998 with the entire Board of Universal to discuss the possibility of an
acquisition of Universal.
 
    On Monday, February 16, 1998, the Board of Directors of 99CENTS Only Stores
met to discuss the proposed acquisition of Universal. Houlihan Lokey made a
presentation to the Board of its preliminary oral opinion regarding the range of
prices to pay to the Universal Shareholders (other than 99CENTS Only Stores) on
which Houlihan Lokey could provide a fairness opinion in connection with the
Exchange Offer. Following the presentation by Houlihan Lokey, the Board of
Directors approved the recommendation that 99CENTS Only Stores proceed with the
Exchange Offer on the terms described in this Proxy Statement/Prospectus.
 
    Following this meeting, the Board contacted the Board of Directors of
Universal to discuss the proposed Exchange Offer and to offer an exchange ratio
of one share of 99CENTS Only Stores for every 16 shares of Universal.
Negotiations continued throughout the day and into the evening. The Board of
Directors of 99CENTS Only Stores decided to issue a press release before the
opening of the market on
 
                                       28

Tuesday, February 17, 1998, to announce its proposal to acquire the outstanding
shares of Universal Common Stock for the Universal Exchange Consideration. The
Board of Universal had not, at that point, decided whether to accept the offer.
 
    On February 24, 1998, 99CENTS Only Stores and each of Mark Ravich, Norman
Ravich and certain trusts for which Mark Ravich is the trustee entered into
separate Stockholder Support Agreements in which each stockholder agreed to vote
its shares of Universal Common Stock (i) in favor of the Exchange Offer and (ii)
in favor of any other matter deemed necessary by 99CENTS Only Stores to
effectuate the Exchange Offer or solicited in connection with the Exchange
Offer, and considered and voted upon by the shareholders of Universal. In
addition, each shareholder executing a Stockholder Support Agreement agreed to
tender and sell all of its Universal Common Stock to 99CENTS Only Stores
pursuant to the terms of the Exchange Offer.
 
    As a result of the Stockholder Support Agreements, 99CENTS Only Stores
obtained the agreement of approximately 10% of the total outstanding shares of
Universal Common Stock (not including the 48% held by 99CENTS Only Stores) to
vote in favor of the Exchange Offer and to tender shares in the Exchange Offer.
 
    The Stockholder Support Agreements also provided that Mark Ravich would
resign immediately from the Board of Directors of Universal.
 
ADVANTAGES TO UNIVERSAL SHAREHOLDERS
 
    SIGNIFICANT PREMIUM.  The Exchange Offer provides shareholders of Universal
an opportunity to receive a significant premium for their Universal Shares. As
of       , 1998, the Exchange Consideration represented a    % and    % premium
to the Universal Common Stock's closing sales prices one day and one week,
respectively, prior to the date 99CENTS Only Stores announced the acquisition of
its initial position in Universal in November 1997.
 
    CONTINUED DISCOUNT RETAILER INVESTMENT OPPORTUNITY.  If the Exchange Offer
is consummated, Universal's current operations will be combined with 99CENTS
Only Stores and Universal's existing shareholders will become shareholders of
99CENTS Only Stores. The former Universal shareholders will continue to
participate in the deep-discount retail and wholesale industry.
 
    MANAGEMENT.  99CENTS Only Stores believes that a significant portion of its
existing success is attributable to its strong management and dedicated
employees. As the nation's oldest one-price general merchandise chain, 99CENTS
Only Stores has assembled a quality management team. 99CENTS Only Stores' senior
management has been stable and consistent over the last several years and has
contributed significantly to 99CENTS Only Stores' results.
 
    SUPERIOR STOCK PERFORMANCE.  Since its initial public offering in 1996,
99CENTS Only Stores has produced share price appreciation in excess of
Universal. 99CENTS Only Stores' share price growth since May 1996 was
percent versus Universal's       percent for the same period. Past stock price
performance is not necessarily indicative of likely future stock price
performance.
 
    RISKS OF FAILURE TO TENDER.  Shareholders of Universal now have the
opportunity to receive a premium for their Universal Shares, and to participate
in the benefits of 99CENTS Only Stores' operating capabilities and financial
results, by participating in the Exchange Offer. By declining an opportunity to
exchange Universal Shares for 99CENTS Only Stores Common Stock, and choosing
instead to continue with an investment in Universal, shareholders are assuming
the risk that the value of Universal Shares may not appreciate following the
Exchange Offer. This risk may be intensified by the following issues:
 
    - Arthur Andersen LLP's audit opinion issued in March 1998 expressed doubt
      about Universal's ability to continue as a going concern.
 
                                       29

    - Universal's financial condition--Universal has reported losses in each of
      the last eight fiscal quarters.
 
    - Universal's need for infusions of working capital to continue operations.
 
NO RECOMMENDATION OF THE UNIVERSAL BOARD OF DIRECTORS
 
    Although Houlihan Lokey has delivered an opinion to 99CENTS Only Stores to
the effect that as of the date of such opinion, the Exchange Consideration to be
furnished by 99CENTS Only Stores is fair to the holders of Universal Common
Stock (other than 99CENTS Only Stores) from a financial point of view, due to
the composition of the Board of Universal including three designees of 99CENTS
Only Stores and two designees of Universal, the Universal Board of Directors has
decided to remain neutral with respect to the Exchange Offer and has not made a
determination that the Exchange Offer is fair to or in the best interests of
Universal and its shareholders. Universal neither recommends a vote for or a
vote against the approval of 99CENTS Only Stores Voting Rights, nor does
Universal make a recommendation that shareholders tender their Universal Shares
in the Exchange Offer.
 
PURPOSE OF THE EXCHANGE OFFER; PLANS FOR UNIVERSAL AFTER THE OFFER
 
    The Company's investment in Universal in November 1997 was motivated by an
opportunity to apply the Company's core competencies to two under-performing
retail chains which the Company believes have significant upside potential.
Universal's strengths include its many attractive store locations, strong trade
name identity and inventory of first-quality, close-out merchandise. In
addition, Universal has built a strong management team led by its Chief
Executive Officer, Richard Ennen, who was hired in September 1996 as Vice
President of Merchandising and assumed his current position in February 1998,
and a solid corporate infrastructure and operating systems. The Company believes
Universal's historical performance has been impaired by (i) a lack of capital,
which has limited its access to merchandise and its ability to purchase
merchandise at attractive prices, (ii) a failure to focus attention on store
merchandising and layout to create an attractive store environment and (iii) a
failure to identify and take advantage of cost saving opportunities. In
addition, Universal's historical performance has been adversely impacted by a
wholesale business and inventory appraisal and consulting service which were
discontinued in 1997.
 
    Since the Company acquired its 48% interest in Universal in November 1997,
Universal has appointed Richard Ennen its new Chief Executive Officer, gained
greater access to name-brand, close-out and regularly available goods,
implemented more savvy purchasing procedures, and developed and begun to
implement a new merchandising program that places greater emphasis on
consumables and focuses on attractive, convenient store layouts. Further,
Universal has determined to close two unprofitable stores and has completed the
consolidation of its three warehouse and distribution facilities into a single
facility. In addition, Universal has identified several areas for cost savings,
including freight, supplies and advertising. Universal introduced its new
merchandising program into one store in late January 1998 with positive initial
results and has expanded its reach to include two additional stores in February
and March 1998. The new merchandising program is expected to be implemented in
all stores by the end of the second quarter of 1998. The full effect of the
measures discussed above are not expected to be reflected in Universal's results
of operations until the third and fourth quarters of 1998. The Company believes
that its strong reputation among suppliers and the depth of its operating
experience in the deep-discount industry has contributed to these changes. The
Company and Universal continue to review Universal's operations to identify
other opportunities for cost savings and improvements to operations. In
addition, the Company and Universal are reviewing less profitable stores to
determine whether any should be relocated or closed.
 
                                       30

    In light of Universal's on-going capital requirements, insights gained by
the Company's management into Universal's operations and the opportunities the
Company's management believes exist for operating synergies, the Company has
determined to acquire the balance of the Universal and Odd's-N-End's shares.
99CENTS Only Stores currently owns approximately 48% of the outstanding
Universal Common Stock. 99CENTS Only Stores is seeking 100% ownership of
Universal for the following reasons:
 
    - FULL BENEFIT OF CURRENT INVESTMENT. 99CENTS Only Stores believes that in
      order to derive the full benefit from the value and potential of its
      current 48% ownership interest in Universal, an acquisition of Universal
      will provide it with the maximum flexibility in utilizing the resources of
      Universal and 99CENTS Only Stores to optimize the return to 99CENTS Only
      Stores' shareholders.
 
    - OPPORTUNITIES FOR THE SALE OF GOODS AT VARIABLE PRICES. Universal's Only
      Deals and Odd's-N-End's stores will provide the Company a retail channel
      for merchandise at prices other than the Company's single price point and
      will enable the Company to increase the volume of merchandise distributed
      by it. The Company believes that this greater distribution capability will
      provide the Company an opportunity to further solidify its relationship
      with its suppliers, increase the Company's exposure to opportunistic
      buying opportunities, allow the Company to capture a wider range of
      merchandise and enable the Company to take greater advantage of volume
      discounts.
 
    - INCREASED ACCESS TO NEW MARKETS. The Exchange Offer will increase the
      number of stores owned by 99CENTS Only Stores to 129 and diversify 99CENTS
      Only Stores' geographic presence into the Midwest, Texas and New York
      (including the stores to be acquired through the proposed acquisition of
      Odd's-N-End's). This geographic presence could serve as a basis for
      launching the Company's 99CENTS Only Stores retail format into these
      regions in future periods.
 
    - COST SAVINGS AND SYNERGIES. The Company believes further opportunities
      exist for improving store level economics. In addition, it is anticipated
      that the acquisition will provide the combined businesses with
      opportunities to realize the efficiencies and synergies available by
      operating on a cooperative basis which include economies of scale in
      purchasing, freight, retail expenses, insurance, marketing, advertising,
      human resources and administration.
 
    - BETTER BUYING OPPORTUNITIES. The Company believes that through the
      acquisition of Universal, it will gain greater access to better buying
      opportunities through the capability to purchase in larger volumes and at
      different prices.
 
    - ELIMINATION OF EXPENSES. 99CENTS Only Stores believes that ownership of
      Universal will remove the burdens on Universal of being a public
      corporation subject to the reporting requirements of the Exchange Act and
      the annual shareholders meeting and board meeting requirements and will
      reduce expenses to the benefit of each of 99CENTS Only Stores and
      Universal. 99CENTS Only Stores expects these savings will result from
      decreased legal, accounting and printing costs, as well as the time saved
      by Universal's employees who will no longer be required to participate in
      the preparation of filings required under the Exchange Act.
 
    Except as indicated in this Proxy Statement/Prospectus, 99CENTS Only Stores
does not have any present plans or proposals which relate to or would result in
an extraordinary corporate transaction, such as a merger, reorganization or
liquidation, involving Universal or any subsidiary, a sale or transfer of a
material amount of assets of Universal or any subsidiary or any material change
in Universal's capitalization or dividend policy or any other material changes
in Universal's corporate structure or business, or the composition of the Board
or Universal's management. See "THE EXCHANGE OFFER--Consequences to
Non-tendering Holders of Universal Common Stock."
 
                                       31

OPINION OF 99CENTS ONLY STORES' FINANCIAL ADVISOR
 
    The Board of Directors of 99CENTS Only Stores engaged Houlihan Lokey to
render an opinion that the Transaction (as defined in the fairness opinion
attached hereto as Annex B), is fair to the public stockholders of Universal
from a financial point of view. The summary of the fairness opinion, as set
forth herein, is qualified in its entirety by reference to the full text of the
opinion. Universal's shareholders are urged to, and should, read the opinion in
its entirety.
 
    Houlihan Lokey is a nationally recognized investment banking firm that is
continually engaged in providing financial advisory services in connection with
mergers and acquisitions, leveraged buyouts, business valuations for a variety
of regulatory and planning purposes, recapitalizations, financial restructurings
and private placements of debt and equity securities. Houlihan Lokey has no
material prior relationship with 99CENTS Only Stores, Universal or their
affiliates.
 
    Houlihan Lokey was verbally retained by 99CENTS Only Stores on approximately
February 10, 1998 to provide its opinion. On February 16, 1998, Houlihan Lokey
delivered orally to the Board of Directors of 99CENTS Only Stores its opinion to
the effect that, as of the date of such opinion and based upon certain
considerations and assumptions, the Transaction is fair, from a financial point
of view, to the public shareholders of Universal. Houlihan Lokey's opinion was
confirmed in writing as of April 20, 1998.
 
    As compensation to Houlihan Lokey for its services in connection with the
Transaction, 99CENTS Only Stores has agreed to pay Houlihan Lokey a fee of
$75,000. No portion of Houlihan Lokey's fees are contingent upon the successful
completion of the Transaction. 99CENTS Only Stores has also agreed to indemnify
Houlihan Lokey and related persons against certain liabilities, including
liabilities under federal securities laws arising out of the engagement of
Houlihan Lokey.
 
    In arriving at its opinion, Houlihan Lokey made its determination as to the
fairness, from a financial point of view, of the Transaction to the public
shareholders of Universal, on the basis of the analyses described below. No
restrictions or limitations were imposed by 99CENTS Only Stores upon Houlihan
Lokey with respect to its investigation or the procedures followed by Houlihan
Lokey in rendering its opinion. Houlihan Lokey's opinion is not intended to be
and does not constitute a recommendation to any shareholder of Universal as to
how to vote with respect to approval of the Transaction or whether to tender
shares of Universal Common Stock in the Exchange Offer.
 
    In arriving at its opinion, Houlihan Lokey made such reviews, analyses and
inquiries as it deemed necessary and appropriate under the circumstances. Among
other things, Houlihan Lokey has (i) reviewed Universal's annual reports to
shareholders on Form 10-K for the three fiscal years ended December 31, 1997;
(ii) reviewed 99CENTS Only Stores' annual reports to shareholders on Form 10-K
for the five fiscal years ended December 31, 1997; (iii) reviewed copies of the
Cooperation Agreement, Irrevocable Proxy, Option and Consulting Agreements and
Shareholder Support Agreements; (iv) reviewed a final draft of the Registration
Statement on Form S-4 with respect to the Exchange Offer dated April 16, 1998;
(v) met with certain members of the senior management of 99CENTS Only Stores to
discuss the operations, financial condition, future prospects and projected
operations and performance of 99CENTS Only Stores; and met with certain members
of the Board of Directors of Universal to discuss the operations, financial
condition, future prospects and projected operations and performance of
Universal; (vi) visited certain facilities and business offices of 99CENTS Only
Stores; (vii) reviewed forecasts and projections prepared by certain members of
Universal's Board of Directors with respect to Universal for the years ended
December 31, 1998 and 1999; (viii) reviewed forecasts and projections prepared
by 99CENTS Only Stores' management with respect to 99CENTS Only Stores for the
year ended December 31, 1998; (ix) reviewed the historical market prices and
trading volume for Universal's and 99CENTS Only Stores' publicly traded
securities; (x) reviewed certain other publicly available financial data for
certain companies that we deem comparable to Universal and 99CENTS Only Stores,
and publicly available prices and premiums paid in other transactions that we
considered similar to the Transaction; (xi) reviewed drafts of certain documents
 
                                       32

to be delivered at the closing of the Transaction; and (xii) conducted such
other studies, analyses and inquiries as we have deemed appropriate.
 
    Houlihan Lokey used several methodologies to assess the fairness of the
Transaction from a financial point of view. Each methodology provided an
estimate as to the value of 99CENTS Only Stores, and Universal and these
valuations formed the basis for analyzing the fairness of the Transaction from a
financial point of view.
 
    The primary methodologies utilized by Houlihan Lokey to estimate the value
of Universal were the Comparative Market Multiple approach, the Discounted Cash
Flow approach, and the Transaction Multiple approach. The comparative market
multiple analysis considered the trading multiples for certain income and cash
flows of a peer group of companies and then applied a selected multiple of
earnings or cash flow to Universal's projected 1998 earnings or cash flow. 1998
projected earnings and cash flow levels were used in Houlihan Lokey's analysis
as Universal incurred losses for 1997. The peer group of companies consisted of
Consolidated Stores Corp., Dollar General Corp., Dollar Tree Stores, Inc.,
Family Dollar Stores, Fred's, Inc., and Mazel Stores, Inc. The selection of the
multiples to be applied to Universal's 1998 projected income and cash flow
levels was based on a comparative financial analysis of Universal and the peer
group of companies. The Discounted Cash Flow analysis considered the projected
cash flow stream generated by Universal and then discounted that stream to the
present using a market based, risk adjusted discount rate. The Transaction
Multiple approach is similar to the Comparative Market Multiple approach, except
that transaction multiples from completed transactions that Houlihan Lokey deems
comparable to the Transaction are used as a basis for selecting multiples to
apply to Universal's 1998 projected income and cash flow streams.
 
    The primary methodologies utilized by Houlihan Lokey to estimate the value
of 99CENTS Only Stores include a public trading price analysis, a Market
Multiple approach and a Discounted Cash Flow approach.
 
    To determine the fairness of the Transaction, from a financial point of
view, to the public shareholders of Universal, Houlihan Lokey compared the
estimated value of the consideration to be received by Universal's public
shareholders (in the form of 99CENTS Only Stores Common Stock) with the value
public shareholders of Universal were exchanging (in the form of Universal
Common Stock) for such 99CENTS Only Stores Common Stock.
 
    Based on the analyses completed by Houlihan Lokey, Houlihan Lokey concluded
that the consideration to be received by the public stockholders of Universal in
connection with the Transaction is fair to them from a financial point of view.
 
    The aforementioned analyses required studies of the overall market, economic
and industry conditions in which 99CENTS Only Stores and Universal operate, and
99CENTS Only Stores' and Universal's operating results. Research into, and
consideration of, these conditions were incorporated into the analyses.
 
    Houlihan Lokey's opinion is based on the business, economic, market and
other conditions as they existed as of the date of this opinion. In rendering
its opinion, Houlihan Lokey has relied upon and assumed, without independent
verification, that the financial results provided to Houlihan Lokey by 99CENTS
Only Stores have been reasonably prepared and reflect the best current available
estimates of the financial results and condition of 99CENTS Only Stores and
Universal. Houlihan Lokey did not independently verify the accuracy or
completeness of the information supplied to it with respect to 99CENTS Only
Stores or Universal and does not assume responsibility for it. Except as set
forth above, Houlihan Lokey did not make any physical inspection or independent
appraisal of the specific properties or assets of 99CENTS Only Stores or
Universal.
 
    The summary set forth above describes the material points of more detailed
analyses performed by Houlihan Lokey in arriving at its fairness opinion. The
preparation of the fairness opinion is a complex
 
                                       33

analytical process involving various determinations as to the most appropriate
and relevant methods of financial analysis and application of those methods to
the particular circumstances, and is therefore not readily susceptible to
summary description. In arriving at its opinion, Houlihan Lokey did not
attribute any particular weight to any analysis or factor considered by it, but
rather made the qualitative judgements as to the significance and relevance of
each analysis and factor. Accordingly, Houlihan Lokey believes that its analyses
and the summary set forth herein must be considered as a whole and that
selecting portions of its analyses, without considering all factors and
analysis, or portions of this summary, without considering all factors and
analyses, could create an incomplete view of the processes underlying the
analyses set forth in the Houlihan Lokey opinion. In its analysis, Houlihan
Lokey made numerous assumptions with respect to 99CENTS Only Stores and
Universal, industry performance, general business, economic, market, and
financial conditions and other matters, many of which are beyond the control of
99CENTS Only Stores and Universal. The estimates contained in such analyses are
not necessarily indicative of actual values or predictive of future results or
values, which may be more or less favorable than suggested by such analyses.
Additionally, analyses relating to the value of businesses or securities are not
appraisals. Accordingly, such analyses and estimates are inherently subject to
substantial uncertainty.
 
INTERESTS OF CERTAIN PERSONS IN THE EXCHANGE OFFER
 
    In considering whether to vote in favor of the 99CENTS Only Stores Voting
Rights, shareholders should be aware that certain members of the management of
Universal and the Board of Directors of Universal have certain interests in the
Exchange Offer that are in addition to the interest of shareholders of Universal
generally.
 
    As discussed under "Discussions Regarding the Exchange Offer," each of Mark
Ravich, the former Chief Executive Officer and former board member of Universal,
Norman Ravich, a former board member of Universal and certain trusts for which
Mark Ravich is trustee, entered into a separate Stockholder Support Agreement
with 99CENTS Only Stores. See "(4)Discussions Regarding the Exchange Offer."
 
    Furthermore, on February 24, 1998, Mark Ravich entered into a Consulting
Agreement with 99CENTS Only Stores whereby Mark Ravich agreed to provide
advisory services to 99CENTS Only Stores in connection with the Exchange Offer
and thereafter to provide sales, management and operations consulting services
in connection with the operation of the business of Universal following
completion of the Exchange Offer. The term of the consulting agreement ends
February 24, 1999. As compensation for the consulting services provided, 99CENTS
Only Stores granted to Mark Ravich an option to acquire 9,375 shares of 99CENTS
Only Stores Common Stock at $40.00 per share, and an option to acquire 15,000
shares of 99CENTS Only Stores Common Stock at $33.5625 per share pursuant to
separate option agreements. Each of the options terminates on the earlier to
occur of a termination of the Exchange Offer and February 19, 2005. Each of the
options becomes fully exercisable on the first business day following
consummation of the Exchange Offer.
 
    On February 26, 1998, Norman Ravich also entered into a Consulting Agreement
with 99CENTS Only Stores whereby Norman Ravich agreed to provide advisory
services to 99CENTS Only Stores in connection with the Exchange Offer and
thereafter to provide sales, management and operation consulting services in
connection with the operation of the business of Universal following completion
of the Exchange Offer. The Consulting Agreement ends on May 27, 1998. As
compensation for the consulting services provided, 99CENTS Only Stores granted
to Norman Ravich an option to purchase 4,688 shares of 99CENTS Only Stores
Common Stock at $40.00 per share pursuant to a separate option agreement. The
option terminates on the earlier to occur of a termination of the Exchange Offer
and February 19, 2005. The option becomes fully exercisable on the first
business day following consummation of the Exchange Offer.
 
                                       34

                               THE EXCHANGE OFFER
 
    THIS PROXY STATEMENT/PROSPECTUS AND THE RELATED LETTER OF TRANSMITTAL
CONTAIN IMPORTANT INFORMATION WHICH SHOULD BE READ BEFORE ANY DECISION IS MADE
WITH RESPECT TO THE EXCHANGE OFFER.
 
TERMS OF THE EXCHANGE OFFER; EXPIRATION DATE
 
    Upon the terms and subject to the conditions of the Exchange Offer
(including, if the Exchange Offer is extended or amended, the terms and
conditions of such extension or amendment), 99CENTS Only Stores hereby offers to
exchange one share of 99CENTS Only Stores Common Stock for each 16 outstanding
shares of Universal Common Stock validly tendered prior to the Expiration Date
(as hereinafter defined) and not withdrawn as provided under "Withdrawal
Rights". The term "Expiration Date" means 12:00 midnight, New York City time, on
      ,       , 1998, unless and until 99CENTS Only Stores, in its sole
discretion shall have extended the period during which the Exchange Offer is
open, in which event the term "Expiration Date" shall mean the latest time and
date at which the Exchange Offer, as so extended by 99CENTS Only Stores, shall
expire.
 
    Upon the terms and subject to the conditions of the Exchange Offer,
including the condition that Universal Common Stock representing at least 32% of
the number of shares of Universal Common Stock outstanding at the Expiration
Date (other than shares owned by 99CENTS Only Stores) have been validly tendered
for exchange and not withdrawn prior to the Expiration Date, 99CENTS Only Stores
will exchange all Universal Common Stock for the Universal Exchange
Consideration. Tendering holders will not be obligated to pay any charges or
expenses of the Exchange Agent or any brokerage commissions. Except as set forth
in the Letter of Transmittal, transfer taxes on the exchange of Universal Common
Stock pursuant to the Exchange Offer will be paid by and on behalf of 99CENTS
Only Stores.
 
    No fractional shares of 99CENTS Only Stores Common Stock will be issued in
connection with the Exchange Offer. Holders of Universal Common Stock otherwise
entitled to receive fractional shares will receive in lieu thereof cash in an
amount equal to such fraction of 99CENTS Only Stores Common Stock which the
holders of Universal Common Stock would otherwise be entitled to receive
multiplied by the average closing price of 99CENTS Only Stores Common Stock as
reported by the New York Stock Exchange for the 20 twenty trading days
immediately preceding the Expiration Date.
 
    Universal has agreed to provide 99CENTS Only Stores with Universal's
shareholder list and security position listings for the purpose of disseminating
the Exchange Offer to holders of shares of Universal Common Stock. This Proxy
Statement/Prospectus and the related Letter of Transmittal will be mailed to
record holders of shares whose names appear on Universal's shareholder list and
will be furnished, for subsequent transmittal to beneficial owners of shares, to
brokers, dealers, commercial banks, trust companies and similar persons whose
names, or the names of whose nominees, appear on the shareholder list or, if
applicable, who are listed as participants in a clearing agency's security
position listing.
 
PROCEDURES FOR ACCEPTING THE EXCHANGE OFFER AND TENDERING SHARES
 
    In order for a holder of shares of Universal Common Stock validly to tender
shares pursuant to the Exchange Offer either (a) the Letter of Transmittal (or a
facsimile thereof), properly completed and duly executed, together with any
required signature guarantees or, in the case of a book-entry transfer, an
Agent's Message (as defined below), and any other documents required by the
Letter of Transmittal, must be received by the Exchange Agent at one of its
addresses set forth on the back cover of this Proxy Statement/Prospectus and
either the certificates for Universal Common Stock (the "Share Certificates")
evidencing tendered Universal Shares must be received by the Exchange Agent at
such address or such Universal Shares must be tendered pursuant to the procedure
for book-entry transfer described below and a Book-Entry Confirmation must be
received by the Exchange Agent, in each case prior to the Expiration
 
                                       35

Date, or (b) the tendering shareholder must comply with the guaranteed delivery
procedures described below.
 
    THE METHOD OF DELIVERY OF SHARE CERTIFICATES AND ALL OTHER REQUIRED
DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY TRANSFER FACILITY, IS AT
THE OPTION AND RISK OF THE TENDERING SHAREHOLDER, AND THE DELIVERY WILL BE
DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE EXCHANGE AGENT. IF DELIVERY IS BY
MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED, IS
RECOMMENDED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO ENSURE TIMELY
DELIVERY.
 
    BOOK-ENTRY TRANSFER.  The Exchange Agent will establish accounts with
respect to the Universal Shares at the Book-Entry Transfer Facilities for
purposes of the Exchange Offer within two business days after the date of this
Proxy Statement/Prospectus. Any financial institution that is a participant in
the system of any Book-Entry Transfer Facility may make a book-entry delivery of
shares by causing such Book-Entry Transfer Facility to transfer such shares into
the Exchange Agent's account at such Book-Entry Transfer Facility in accordance
with such Book-Entry Transfer Facility's procedures for such transfer. However,
although delivery of shares may be effected through book-entry transfer at a
Book-Entry Transfer Facility, the Letter of Transmittal (or a facsimile
thereof), properly completed and duly executed, together with any required
signature guarantees, or an Agent's Message, and any other required documents,
must, in any case, be received by the Exchange Agent at one of its addresses set
forth on the back cover of this Proxy Statement/Prospectus prior to the
Expiration Date, or the tendering shareholder must comply with the guaranteed
delivery procedure described below. DELIVERY OF DOCUMENTS TO A BOOK-ENTRY
TRANSFER FACILITY DOES NOT CONSTITUTE DELIVERY TO THE EXCHANGE AGENT.
 
    The term "Agent's Message" means a message transmitted by a Book-Entry
Transfer Facility to, and received by, the Exchange Agent and forming a part of
a Book-Entry Confirmation, which states that such Book-Entry Transfer Facility
has received an express acknowledgment from the participant in such Book-Entry
Transfer Facility tendering the Universal Common Stock that such participant has
received and agrees to be bound by the terms of the Letter of Transmittal and
that 99CENTS Only Stores may enforce such agreement against such participant.
 
    SIGNATURE GUARANTEES.  Signatures on all Letters of Transmittal must be
guaranteed by a firm which is a financial institution (including most commercial
banks, savings and loan associations and brokerage houses) that is a participant
in the Securities Transfer Agents Medallion Program, the New York Stock Exchange
Medallion Signature Guarantee Program or the Stock Exchange Medallion Program
(each, an "Eligible Institution"), except in cases where Universal Shares are
tendered (i) by a registered holder of Universal Shares who has not completed
either the box entitled "Special Payment Instructions" or the box entitled
"Special Exchange Instructions" on the Letter of Transmittal or (ii) for the
account of an Eligible Institution. If a Share Certificate is registered in the
name of a person other than the signatory of the Letter of Transmittal, or if
payment is to be made, or a Share Certificate not accepted for payment or not
tendered is to be returned, to a person other than the registered holder(s),
then the Share Certificate must be endorsed or accompanied by appropriate stock
powers, in either case signed exactly as the name(s) of the registered holder(s)
appear on the Share Certificate, with the signature(s) on such Share Certificate
or stock powers guaranteed by an Eligible Institution. See Instructions 1 and 5
of the Letter of Transmittal.
 
    GUARANTEED DELIVERY.  If a shareholder desires to tender Universal Shares
pursuant to the Exchange Offer and such shareholder's Share Certificates
evidencing such Universal Shares are not immediately available or such
shareholder cannot deliver the Share Certificates and all other required
documents to the Exchange Agent prior to the Expiration Date, or such
shareholder cannot complete the procedure for delivery by book-entry transfer on
a timely basis, such Universal Shares may nevertheless be tendered, provided
that all the following conditions are satisfied:
 
                                       36

        (i) such tender is made by or through an Eligible Institution;
 
        (ii) a properly completed and duly executed Notice of Guaranteed
    Delivery, substantially in the form made available by 99CENTS Only Stores,
    is received by the Exchange Agent prior to the Expiration Date as provided
    below; and
 
       (iii) the Share Certificates (or a Book-Entry Confirmation) evidencing
    all tendered Universal Shares, in proper form for transfer, in each case
    together with the Letter of Transmittal (or a facsimile thereof), properly
    completed and duly executed, with any required signature guarantees, or, in
    the case of a book-entry transfer, an Agent's Message, and any other
    documents required by the Letter of Transmittal are received by the Exchange
    Agent within three New York Stock Exchange trading days after the date of
    execution of such Notice of Guaranteed Delivery.
 
    The Notice of Guaranteed Delivery may be delivered by hand or mail or
transmitted by telegram or facsimile transmission to the Exchange Agent and must
include a guarantee by an Eligible Institution in the form set forth in the form
of Notice of Guaranteed Delivery made available by 99CENTS Only Stores.
 
    In all cases, the exchange of Universal Exchange Consideration for Universal
Shares tendered and accepted for exchange pursuant to the Exchange Offer will be
made only after timely receipt by the Exchange Agent of the Share Certificates
evidencing such shares, or a Book-Entry Confirmation of the delivery of such
shares, and the Letter of Transmittal (or a facsimile thereof), properly
completed and duly executed, with any required signature guarantees, and any
other documents required by the Letter of Transmittal or, in the case of a
book-entry transfer, an Agent's Message.
 
    The tender of Universal Shares pursuant to any of the procedures described
above will constitute a binding agreement between the tendering shareholder and
99CENTS Only Stores upon the terms and subject to the conditions of the Exchange
Offer, including the tendering shareholder's representation and warranty that
such holder has the full power and authority to tender and assign the Universal
Common Stock tendered, as specified in the Letter of Transmittal.
 
    DETERMINATION OF VALIDITY.  All questions as to the validity, form,
eligibility (including time of receipt) and acceptance for exchange of any
tender of Universal Shares will be determined by 99CENTS Only Stores in its sole
discretion, which determination shall be final and binding on all parties.
99CENTS Only Stores reserves the absolute right to reject any and all tenders
determined by it not to be in proper form or the acceptance for exchange of
which may, in the opinion of its counsel, be unlawful. 99CENTS Only Stores also
reserves the absolute right to waive any condition of the Exchange Offer or any
defect or irregularity, in the tender of any Universal Shares of any particular
shareholder, whether or not similar defects or irregularities are waived in the
case of other shareholders. No tender of Universal Shares will be deemed to have
been validly made until all defects and irregularities have been cured or
waived. None of 99CENTS Only Stores, the Dealer Manager, the Exchange Agent, the
Information Agent or any other person will be under any duty to give
notification of any defects or irregularities in tenders or incur any liability
for failure to give any such notification. 99CENTS Only Stores' interpretation
of the terms and conditions of the Exchange Offer (including the Letter of
Transmittal and the instructions thereto) will be final and binding.
 
    OTHER REQUIREMENTS.  By executing the Letter of Transmittal as set forth
above (including through delivery of an Agent's Message), a tendering
shareholder irrevocably appoints designees of 99CENTS Only Stores as such
shareholder's attorneys-in-fact and proxies, each with full power of
substitution, in the manner set forth in the Letter of Transmittal, to the full
extent of such shareholder's rights with respect to the Universal Shares
tendered by such shareholder and accepted for exchange by 99CENTS Only Stores
(and with respect to any and all other Universal Shares or other securities
issued or issuable in respect of such Universal Shares on or after the date of
this Proxy Statement/Prospectus). All such proxies shall be considered coupled
with an interest in the tendered Universal Shares. Such appointment will be
effective when, and only to the extent that, 99CENTS Only Stores accepts such
Universal Shares for exchange.
 
                                       37

Upon such acceptance for exchange, all prior powers of attorney and proxies
given by such shareholder with respect to such Universal Shares (and such other
Universal Shares and securities) will be revoked without further action, and no
subsequent powers of attorney and proxies may be given nor any subsequent
written consent executed by such shareholder (and, if given or executed, will
not be deemed to be effective) with respect thereto. The designees of 99CENTS
Only Stores will, with respect to the Universal Shares for which the appointment
is effective, be empowered to exercise all voting and other rights of such
shareholder as they in their sole discretion may deem proper at any annual or
special meeting of Universal's shareholders or any adjournment or postponement
thereof, by written consent in lieu of any such meeting or otherwise. 99CENTS
Only Stores reserves the right to require that, in order for Universal Shares to
be deemed validly tendered, immediately upon 99CENTS Only Stores' payment for
such shares, 99CENTS Only Stores must be able to exercise full voting rights
with respect to such shares.
 
    IN ORDER TO PREVENT BACKUP FEDERAL INCOME TAX WITHHOLDING WITH RESPECT TO
UNIVERSAL EXCHANGE CONSIDERATION RECEIVED BY SHAREHOLDERS PURSUANT TO THE
EXCHANGE OFFER, EACH SUCH SHAREHOLDER MUST PROVIDE THE EXCHANGE AGENT WITH SUCH
SHAREHOLDER'S CORRECT TAXPAYER IDENTIFICATION NUMBER AND CERTIFY THAT SUCH
SHAREHOLDER IS NOT SUBJECT TO BACKUP WITHHOLDING BY COMPLETING THE SUBSTITUTE
FORM W-9 IN THE LETTER OF TRANSMITTAL. CERTAIN SHAREHOLDERS (INCLUDING, AMONG
OTHERS, ALL CORPORATIONS AND CERTAIN FOREIGN INDIVIDUALS AND ENTITIES) ARE NOT
SUBJECT TO BACKUP WITHHOLDING. ALL SHAREHOLDERS SURRENDERING SHARES PURSUANT TO
THE OFFER SHOULD COMPLETE AND SIGN THE SUBSTITUTE FORM W-9 (INCLUDED IN THE
LETTER OF TRANSMITTAL) TO PROVIDE THE INFORMATION NECESSARY TO AVOID BACKUP
WITHHOLDING (UNLESS AN APPLICABLE EXEMPTION EXISTS AND IS PROVED IN A MANNER
SATISFACTORY TO THE EXCHANGE AGENT). NON-CORPORATE FOREIGN SHAREHOLDERS SHOULD
COMPLETE AND SIGN A FORM W-8, CERTIFICATE OF FOREIGN STATUS (A COPY OF WHICH MAY
BE OBTAINED FROM THE EXCHANGE AGENT), IN ORDER TO AVOID BACKUP WITHHOLDING. SEE
INSTRUCTION 10 OF THE LETTER OF TRANSMITTAL.
 
    WITHDRAWAL RIGHTS.  Tenders of Universal Shares made pursuant to the
Exchange Offer are irrevocable except that such Universal Shares may be
withdrawn at any time prior to the Expiration Date and, unless theretofore
accepted for payment by 99CENTS Only Stores pursuant to the Exchange Offer, may
also be withdrawn at any time after       , 1998. If 99CENTS Only Stores extends
the Exchange Offer, is delayed in its acceptance for payment of Universal Shares
or is unable to accept Universal Shares for payment pursuant to the Exchange
Offer for any reason, then, without prejudice to 99CENTS Only Stores' rights
under the Exchange Offer, the Exchange Agent may, nevertheless, on behalf of
99CENTS Only Stores, retain tendered Universal Shares, and such shares may not
be withdrawn except to the extent that tendering shareholders are entitled to
withdrawal rights as described herein. Any such delay will be by an extension of
the Exchange Offer to the extent required by law.
 
    For a withdrawal to be effective, a written, telegraphic or facsimile
transmission notice of withdrawal must be timely received by the Exchange Agent
at one of its addresses set forth on the back cover page of this Proxy
Statement/Prospectus. Any such notice of withdrawal must specify the name of the
person who tendered the Universal Shares to be withdrawn, the number of such
shares to be withdrawn and the name of the registered holder of such shares, if
different from that of the person who tendered such shares. If Share
Certificates evidencing Universal Shares to be withdrawn have been delivered or
otherwise identified to the Exchange Agent, then, prior to the physical release
of such Share Certificates, the serial numbers shown on such Share Certificates
must be submitted to the Exchange Agent and the signature(s) on the notice of
withdrawal must be guaranteed by an Eligible Institution, unless such shares
have been tendered for the account of an Eligible Institution. If Universal
Shares have been tendered pursuant to the procedure for book-entry transfer as
set forth in "--Procedures for Accepting the Exchange Offer and
 
                                       38

Tendering Shares," any notice of withdrawal must specify the name and number of
the account at the Book-Entry Transfer Facility to be credited with the
withdrawn shares.
 
    All questions as to the form and validity (including time of receipt) of any
notice of withdrawal will be determined by 99CENTS Only Stores in its sole
discretion, whose determination will be final and binding. None of 99CENTS Only
Stores, the Dealer Manager, the Exchange Agent, the Information Agent or any
other person will be under any duty to give notification of any defects or
irregularities in any notice of withdrawal or incur any liability for failure to
give any such notification.
 
    Any Universal Shares properly withdrawn will thereafter be deemed not to
have been validly tendered for purposes of the Exchange Offer. However,
withdrawn shares may be re-tendered at any time prior to the Expiration Date by
following one of the procedures described in "--Procedures for Accepting the
Offer and Tendering Shares."
 
EXCHANGE OF UNIVERSAL COMMON STOCK
 
    Upon the terms and subject to the conditions of the Exchange Offer, 99CENTS
Only Stores will accept for exchange, and will transfer Universal Exchange
Consideration in exchange for, Universal Common Stock validly tendered and not
withdrawn by the Expiration Date as promptly as practicable after the later of
(i) the Expiration Date and (ii) the satisfaction or waiver of the conditions
set forth in "--Certain Conditions of the Exchange Offer." 99CENTS Only Stores
reserves the right, in its sole discretion subject to Rules 13e-4(f) and
14e-1(c) under the Exchange Act, to delay the acceptance for exchange or delay
exchange of any share of Universal Common Stock in order to comply in whole or
in part with any applicable law. For a description of 99CENTS Only Stores rights
to terminate the Exchange Offer and not accept for exchange of, or exchange for,
any shares of Universal Common Stock or to delay acceptance for exchange of, or
exchange for, any shares of Universal Common Stock, see "--Extension of Tender
Period; Termination; Amendment."
 
    For purposes of the Exchange Offer, 99CENTS Only Stores shall be deemed to
have accepted for exchange shares of Universal Common Stock tendered for
exchange when, as and if 99CENTS Only Stores gives oral or written notice to the
Exchange Agent of its acceptance of the tenders of such shares of Universal
Common Stock for exchange. Exchange of shares of Universal Common Stock accepted
for exchange pursuant to the Exchange Offer will be made by deposit of Universal
Exchange Consideration with the Exchange Agent which will act as agent for the
tendering holders of Universal Common Stock for the purpose of receiving
Universal Exchange Consideration from 99CENTS Only Stores and transmitting such
Universal Exchange Consideration to tendering holders of Universal Common Stock.
In all cases, exchange for Universal Common Stock accepted for exchange pursuant
to the Exchange Offer will be made only after timely receipt by the Exchange
Agent of certificates for Universal Common Stock (or of a confirmation of a
book-entry transfer of such Universal Common Stock into the Exchange Agent's
account at one of the Book-Entry Transfer Facilities), a properly completed and
duly executed Letter of Transmittal (or a facsimile thereof), or an Agent's
Message in the case of a book-entry transfer of Universal Common Stock and any
other required documents. For a description of the procedure for tendering
Universal Common Stock pursuant to the Exchange Offer, see "--Procedures for
Accepting the Exchange Offer and Tendering Shares." Accordingly, exchange of
Universal Exchange Consideration for Share Certificates and other required
documents occur at different times. Under no circumstances will interest be paid
by 99CENTS Only Stores pursuant to the Exchange Offer, regardless of any delay
in making such exchange.
 
    If any condition of the Exchange Offer is not satisfied, 99CENTS Only Stores
will not be obligated to exchange Universal Exchange Consideration for Share
Certificates pursuant to the Exchange Offer. See "--Certain Conditions of the
Exchange Offer." 99CENTS Only Stores will exchange the same amount of Universal
Exchange Consideration for each share accepted for exchange pursuant to the
Exchange Offer.
 
                                       39

    If any tendered shares of Universal Common Stock are not exchanged pursuant
to the Exchange Offer for any reason, or if certificates are submitted for more
shares of Universal Common Stock than are tendered, certificates for such
unexchanged or untendered shares of Universal Common Stock will be returned (or,
in the case of shares of Universal Common Stock tendered by book-entry transfer,
such shares of Universal Common Stock will be credited to an account maintained
at one of the Book-Entry Transfer Facilities), without expense to the tendering
holder of shares of Universal Common Stock, as promptly as practicable following
the expiration or termination of the Exchange Offer.
 
CERTAIN CONDITIONS OF THE EXCHANGE OFFER
 
    Notwithstanding any other provision of the Exchange Offer, without prejudice
to 99CENTS Only Stores' other rights under the Exchange Offer, 99CENTS Only
Stores will not be required to accept for exchange or exchange any shares of
Universal Common Stock tendered pursuant to the Exchange Offer, and may
terminate the Exchange Offer as provided in "--Extension of Tender Period;
Termination; Amendment" or amend the Exchange Offer and may postpone the
acceptance for exchange of the shares of Universal Common Stock, unless shares
of Universal Common Stock representing not less than 32% of the then outstanding
Universal Common Stock (other than shares owned by 99 CENTS Only Stores) are
validly tendered and not withdrawn prior to the Expiration Date and unless:
 
        (a) the representations and warranties of Universal contained in the
    Stock Purchase Agreement in connection with the November 17 Acquisition are
    in all material respects true and accurate as of the date when made and,
    except for changes expressly contemplated by the Stock Purchase Agreement,
    at and as of the Expiration Date as if made on the Expiration Date;
 
        (b) there has not been threatened or instituted by any governmental
    authority any action or proceeding before any court or governmental,
    administrative or regulatory authority or agency of competent jurisdiction,
    domestic or foreign, (i) challenging or seeking to make illegal, materially
    delay or otherwise directly or indirectly restrain or prohibit or make
    materially more costly the making of the Exchange Offer, the acceptance for
    payment of, or payment for, any shares of Universal Common Stock by 99CENTS
    Only Stores or any other affiliate of or the consummation of any other
    transaction contemplated by the Exchange Offer or seeking to obtain material
    damages in connection with any transaction contemplated by the Exchange
    Offer; (ii) seeking to prohibit or limit materially the ownership or
    operation by 99CENTS Only Stores or any of its subsidiaries of all or any
    material portion of the business or assets of Universal, 99CENTS Only Stores
    or any of their subsidiaries, or to compel Universal, 99CENTS Only Stores or
    any of their subsidiaries to dispose of or hold separate all or any portion
    of the business or assets of Universal, 99CENTS Only Stores or any of their
    subsidiaries, as a result of the transaction contemplated by the Exchange
    Offer; (iii) seeking to impose or confirm limitations on the ability of
    99CENTS Only Stores or any other affiliate of 99CENTS Only Stores to
    exercise effectively full rights of ownership of any shares, including,
    without limitation, the right to vote any shares acquired by 99CENTS Only
    Stores pursuant to the Exchange Offer or otherwise on all matters properly
    presented to Universal's shareholders, including, without limitation, the
    approval of the transactions contemplated by the Exchange Offer; (iv)
    seeking to require divestiture by 99CENTS Only Stores or any other affiliate
    of 99CENTS Only Stores of any shares; or (v) which otherwise gives rise to
    any circumstance, change in or effect on Universal or any subsidiary that
    is, or is reasonably likely to be, materially adverse to the business,
    financial condition, results of operations, assets or liabilities
    (including, without limitation, contingent liabilities) of Universal and the
    subsidiaries, taken as a whole ("Material Adverse Effect");
 
        (c) there has not been any action taken, or any statute, rule,
    regulation, legislation, interpretation, judgment, order or injunction
    enacted, entered, enforced, promulgated, amended, issued or deemed
    applicable to (i) 99CENTS Only Stores, Universal or any subsidiary or
    affiliate of 99CENTS Only Stores or (ii) any transaction contemplated by the
    Exchange Offer, by any legislative body, court, government or governmental,
    administrative or regulatory authority or agency, domestic
 
                                       40

    or foreign, other than the routine application of the waiting period
    provisions of the HSR Act to the Exchange Offer, which is reasonably likely
    to result, directly or indirectly, in any of the consequences referred to in
    clauses (i) through (v) of paragraph (b) above, except that the Exchange
    Offer may not be terminated or amended solely because of a temporary order
    or injunction unless it is not lifted within 20 days after being issued;
 
        (d) no written advice has been received by 99CENTS Only Stores or
    Universal, or their respective counsel from any governmental body, and
    remains in effect, stating that an action or proceeding will, if the
    Exchange Offer is consummated or sought to be consummated, be filed seeking
    to invalidate or restrain the Exchange Offer;
 
        (e) the Rights Agreement shall have been amended to waive the
    application of the Rights Agreement to the Exchange Offer and the other
    transactions contemplated hereby, or Universal shall have redeemed the
    Rights (the "Rights Agreement Condition");
 
        (f) the required approval of the shareholders of Universal under Section
    671 of the MBCA necessary to accord full voting rights to the shares of
    Universal Common Stock acquired by 99CENTS Only Stores in the Exchange Offer
    and all approvals and authorizations of public authorities have been
    obtained, and no such consents or approvals have imposed a condition to such
    consent or approval which is unduly burdensome to the business of 99CENTS
    Only Stores or Universal, and all waiting periods specified by law
    (including under HSR Act) have passed;
 
        (g) there will not have occurred any changes, conditions, events or
    developments that have, individually or in the aggregate, a Material Adverse
    Effect;
 
        (h) there will not have occurred (i) any general suspension of, or
    limitation on prices for, trading in securities on the New York Stock
    Exchange, (ii) a declaration of a banking moratorium or any suspension of
    payments in respect of banks in the United States or (iii) any limitation
    (whether or not mandatory) by any government or governmental, administrative
    or regulatory authority or agency of the United States on the extension of
    credit by banks or other lending institutions;
 
        (i) it will not have been publicly disclosed or 99CENTS Only Stores will
    not have otherwise learned that beneficial ownership (determined for the
    purposes of this paragraph as set forth in Rule 13d-3 promulgated under the
    Exchange Act) of more than 20% of the then outstanding shares of Universal
    Common Stock has been acquired by any person, other than 99CENTS Only Stores
    or any of its affiliates or (ii) (A) the Board of Universal or any committee
    thereof has withdrawn or modified in a manner adverse to 99CENTS Only Stores
    its position with respect to the Exchange Offer, or approved or recommended
    any acquisition proposal or any other acquisition of shares other than the
    Exchange Offer or (B) the Board of Universal or any committee thereof has
    resolved to do any of the foregoing;
 
        (j) neither Universal nor any of its subsidiaries shall have, directly
    or indirectly, (i) split, combined, subdivided, consolidated or otherwise
    changed, or authorized or proposed a split, combination, subdivision,
    consolidation or other change of, the Universal Shares or otherwise changed
    its capitalization, (ii) acquired or otherwise caused a reduction in the
    number of, or authorized or proposed the acquisition or other reduction in
    the number of, outstanding Universal Shares or other securities, other than
    a redemption of the Rights in accordance with the terms of the Rights
    Agreement, (iii) issued, distributed or sold, or authorized, proposed or
    announced the issuance, distribution or sale of, additional Universal Shares
    (other than the issuance of Universal Shares under currently outstanding
    options), (iv) declared or paid, or proposed to declare or pay, any dividend
    or other distribution, whether payable in cash, securities or other
    property, on or with respect to any shares in the capital of Universal
    (other than a distribution in respect of a redemption of the Rights in
    accordance with the Rights Agreement), (v) altered or proposed to alter any
    material term of any outstanding security (including the Rights) other than
    to amend the Rights Agreement to make the
 
                                       41

    Rights inapplicable to the Exchange Offer and the transactions contemplated
    thereby, (vi) issued, distributed or sold, or authorized or proposed the
    issuance, distribution or sale of, any debt securities or any securities
    convertible into or exchangeable for debt securities or any rights, warrants
    or options entitling the holder thereof to purchase or otherwise acquire any
    debt securities or incurred, or authorized or proposed the incurrence of,
    any debt other than in the ordinary course of business or any debt
    containing burdensome covenants, (vii) authorized, recommended, proposed,
    entered into or announced its intention to enter into an agreement with
    respect to, or to cause, any merger, consolidation, liquidation,
    dissolution, business combination, acquisition of assets or securities,
    disposition of assets or securities, release or relinquishment of any
    material contractual or other right of Universal or any of its subsidiaries
    or any comparable event, (viii) authorized, recommended, proposed or entered
    into, or announced its intention to authorize, recommend, propose or enter
    into, any agreement or arrangement with any person or group that in the sole
    judgment of 99CENTS Only Stores could adversely affect either the value of
    Universal or any of its subsidiaries or the value of the Universal Shares to
    99CENTS Only Stores, (ix) entered into any employment, severance, or similar
    agreement, arrangement or plan with or for the benefit of any of its
    employees other than in the ordinary course of business in accordance with
    past practice or entered into or amended any agreements, arrangements or
    plans or exercised any discretion conferred on Universal's or any
    subsidiary's board of directors or any committee thereof so as to provide
    for increased or accelerated benefits to any employees as a result of or in
    connection with the transactions contemplated by the Exchange Offer or any
    other business combination or otherwise amended any such agreement,
    arrangement or plan to make the same more favorable to any such employee,
    (x) except as may be required by law, taken any action to terminate or amend
    any employee benefit plan (as defined in Section 3(2) of the Employee
    Retirement Income Security Act of 1974, as amended) of Universal or any of
    its subsidiaries, (xi) amended, or authorized or proposed any amendment to,
    its articles or any other material agreement (other than any amendment which
    provides that the Rights are inapplicable to the Exchange Offer) or (xii)
    otherwise acted out of the ordinary course of business, consistent with past
    practice;
 
        (k) a tender or exchange offer, takeover bid or insider bid for some
    portion or all of any outstanding securities of Universal or any of its
    subsidiaries (including the Universal Shares or Rights) shall not have been
    publicly proposed to be made or shall not have been made by another person
    (including Universal or any of its subsidiaries or affiliates);
 
        (l) Universal shall not have failed to perform in any material respect
    any obligation or to comply in any material respect with any agreement or
    covenant of Universal to be performed or complied with by it under the
    Agreement;
 
        (m) 99CENTS Only Stores and Universal shall not have agreed that 99CENTS
    Only Stores will terminate the Exchange Offer or postpone the acceptance for
    payment of or payment for shares of Universal Common Stock thereunder,
    which, in the reasonable good faith judgment of 99CENTS Only Stores in any
    such case, and regardless of the circumstances (including any action or
    inaction by 99CENTS Only Stores or any of its affiliates) giving rise to any
    such condition, makes it inadvisable to proceed with such acceptance for
    payment or payment;
 
        (n) any approval, permit, authorization, favorable review or consent of
    any governmental entity shall have been obtained on terms satisfactory to
    99CENTS Only Stores in its sole discretion;
 
        (o) the Exchange Offer Consideration shall have been listed on the New
    York Stock Exchange; and
 
        (p) the Registration Statement has become effective prior to the
    commencement of the Exchange Offer and the mailing of this Proxy
    Statement/Prospectus, no stop order suspending the effectiveness of the
    Registration Statement has been issued and no proceedings for that purpose
    have been initiated or threatened by the Commission.
 
                                       42

    The foregoing conditions are for the sole benefit of 99CENTS Only Stores and
may be asserted by 99CENTS Only Stores in its sole discretion regardless of the
circumstances giving rise to any such conditions or may be waived by 99CENTS
Only Stores in its sole discretion in whole at any time or in part from time to
time. The failure by 99CENTS Only Stores at any time to exercise its rights
under any of the foregoing conditions shall not be deemed a waiver of any such
right, the waiver of any such right with respect to particular facts and
circumstances shall not be deemed a waiver with respect to any other facts and
circumstances, and each such right shall be deemed an ongoing right which may be
asserted at any time or from time to time. Any determination by 99CENTS Only
Stores concerning the events described in the preceding paragraph will be final
and binding upon all parties.
 
EXTENSION OF TENDER PERIOD; TERMINATION; AMENDMENT
 
    99CENTS Only Stores reserves the right (but will not be obligated), at any
time or from time to time (whether before or after the requisite approval of
Universal Shareholders), in its sole discretion, (i) to extend the period of
time during which the Exchange Offer is open by giving oral or written notice of
such extension to the Exchange Agent, (ii) to amend the Exchange Offer by giving
oral or written notice of such amendment to the Exchange Agent, (iii) to delay
(except as otherwise required by applicable law) acceptance for exchange of, or
exchange for, any shares of Universal Common Stock or (iv) to terminate the
Exchange Offer and not accept for exchange of, or exchange for, any shares of
Universal Common Stock.
 
    If 99CENTS Only Stores extends the period of time during which the Exchange
Offer is open, is delayed in accepting for exchange or exchanging any shares of
Universal Common Stock or is unable to accept for exchange or exchange any
shares of Universal Common Stock pursuant to the Exchange Offer for any reason,
then, without prejudice to 99CENTS Only Stores' rights under the Exchange Offer,
the Exchange Agent may, on behalf of 99CENTS Only Stores, retain all shares of
Universal Common Stock tendered, and such shares of Universal Common Stock may
not be withdrawn except as otherwise provided in "--Withdrawal Rights." The
reservation by 99CENTS Only Stores of the right to delay acceptance for exchange
of, or exchange for, any shares of Universal Common Stock is subject to the
requirements of Rules 13e-4(f) and 14e-1(c) under the Exchange Act, which
require that 99CENTS Only Stores pay the consideration offered or return the
shares of Universal Common Stock deposited by or on behalf of holders of shares
of Universal Common Stock promptly after the termination or withdrawal of the
Exchange Offer.
 
    If 99CENTS Only Stores makes a material change in the terms of the Exchange
Offer or the information concerning the Exchange Offer or waives a material
condition of the Exchange Offer, 99CENTS Only Stores will disseminate additional
tender offer materials and extend the Exchange Offer to the extent required by
Rules 13e-4(d), 13e-4(e), 13e-4(f), 14d-4(c), 14d-6(d) and 14e-1 under the
Exchange Act. The minimum period during which an offer must remain open
following material changes in the terms of the offer or information concerning
the offer, other than a change in price or a change in the percentage of
securities sought or a change in any dealer's soliciting fee, will depend upon
the facts and circumstances then existing, including the relative materiality of
the changed terms or information. In the Commission's view, an offer should
remain open for a minimum of five business days from the date a material change
is first published, sent or given to security holders, and, if material changes
are made with respect to information that approaches the significance of price
and share levels, a minimum of ten business days may be required to allow for
adequate dissemination and investor response. With respect to a change in price
or, subject to certain limitations, a change in the percentage of securities
sought or a change in any dealer's soliciting fee, a minimum period of ten
business days is generally required under the applicable rules and regulations
of the Commission to allow for adequate dissemination to security holders and
investor response. Accordingly, if (i) 99CENTS Only Stores increases or
decreases the consideration offered for Universal Common Stock pursuant to the
Exchange Offer, 99CENTS Only Stores decreases the number of shares of Universal
Common Stock eligible for exchange or changes are made in any dealer's
soliciting fee
 
                                       43

and (ii) the Exchange Offer is scheduled to expire at any time earlier than the
expiration of a period ending on the tenth business day from and including the
date that notice of such increase or decrease is first published, sent or given,
the Exchange Offer will be extended until the expiration of such period of ten
business days. The term "business day" shall mean any day other than a Saturday,
Sunday or a federal holiday and shall consist of the time period from 12:01 A.M.
through 12:00 midnight, New York City time.
 
    Any extension, delay, waiver, amendment or termination of the Exchange Offer
will be followed as promptly as practicable by a public announcement. In the
case of an extension, Rule 14e-1(d) under the Exchange Act requires that the
announcement be issued no later than 9:00 A.M., New York City time, on the next
business day after the previously scheduled Expiration Date in accordance with
the public announcement requirements of Rule 14d-4(c) under the Exchange Act.
Subject to applicable law (including Rules 13e-4(e), 14d-4(c) and 14d-6(d) under
the Exchange Act, which require that any material change in the information
published, sent or given to holders of Universal Common Stock in connection with
the Exchange Offer be promptly disseminated to holders of Universal Common Stock
in a manner reasonably designed to inform holders of Universal Common Stock of
such change), and without limiting the manner in which 99CENTS Only Stores may
choose to make any public announcement, 99CENTS Only Stores will not have any
obligation to publish, advertise or otherwise communicate any such public
announcement other than by making a release to the Dow Jones News Service.
 
CONSEQUENCES TO NON-TENDERING HOLDERS OF UNIVERSAL COMMON STOCK.
 
    The rights of non-tendering holders of Universal Common Stock will not be
altered, impaired or modified by the Exchange Offer. However, the purchase of
Universal Common Stock pursuant to the Exchange Offer will reduce the number of
holders of Universal Common Stock and the number of shares that might otherwise
trade publicly and could adversely affect the liquidity and market value of the
remaining shares, if any, held by the public. Universal Common Stock is
currently listed and traded on the Nasdaq National Market, which constitutes the
principal trading market for the Universal Common Stock. Depending upon the
number of shares purchased pursuant to the Exchange Offer, the Universal Common
Stock may no longer meet the requirements for continued listing on the Nasdaq
National Market and may be delisted. The Nasdaq National Market published
guidelines indicate that it would consider delisting the Universal Common Stock
if, among other things, the total number of publicly held shares falls below
200,000, the market value of publicly held shares is less than $1 million or the
total number of shareholders should fall below 400 (or 300 holders of round
lots). If these standards are not met, quotations might continue to be published
in the Nasdaq National Market, but if the number of holders of the shares of
Universal Common Stock falls below 300, or if the number of publicly held shares
falls below 100,000, or if the aggregate market value of such publicly held
shares does not exceed $200,000 or there are not at least two registered and
active market makers, one of which may be a market maker entering a stabilizing
bid, Nasdaq rules provide that the securities would no longer qualify for
inclusion in Nasdaq and Nasdaq would cease to provide any quotations. Shares
held directly or indirectly by an officer or director of Universal or by a
beneficial owner of more than 10% of the Universal Shares will ordinarily not be
considered as being publicly held for this purpose. In the event the shares were
no longer eligible for Nasdaq quotation, quotations might still be available
from other sources. The extent of the public market for the shares and the
availability of such quotations would, however, depend upon the number of
holders of such shares remaining at such time, the interest in maintaining a
market in such shares on the part of securities firms, the possible termination
of registration of such shares under the Exchange Act as described below and
other factors.
 
    According to the Annual Report on Form 10-K filed by Universal for the year
ended December 31, 1997, as of March 17, 1998, there were over 100 holders of
record of Universal Common Stock (which do not include shares held under "street
name") and 9,393,328 shares were outstanding. If, as a result of the purchase of
Universal Common Stock pursuant to the Exchange Offer or otherwise, the
Universal Common Stock no longer meets the requirements of the Nasdaq National
Market for continued listing and
 
                                       44

the listing of Universal Common Stock is discontinued on the Nasdaq National
Market, the market for and trading in Universal Common Stock could be adversely
affected.
 
    The Universal Common Stock is currently registered under the Exchange Act.
Registration of the Universal Common Stock under the Exchange Act may be
terminated upon application of Universal to the Commission if the Universal
Common Stock is not held by 300 or more holders of record. Termination of
registration of Universal Common Stock under the Exchange Act would make certain
provisions of the Exchange Act no longer applicable to Universal, such as the
short-swing profit recovery provisions of Section 16(b) of the Exchange Act, the
requirement of furnishing a proxy statement pursuant to Section 14(a) of the
Exchange Act in connection with shareholders' meetings and the related
requirement of furnishing an annual report to shareholders and the requirements
of Rule 13e-3 under the Exchange Act with respect to "going private"
transactions and would substantially reduce the information required to be
furnished by Universal to its shareholders and to the Commission. Furthermore,
the ability of "affiliates" of Universal and persons holding "restricted
securities" of Universal to dispose of such securities pursuant to Rule 144 or
144A promulgated under the Securities Act, may be impaired or eliminated.
 
    99CENTS Only Stores cannot predict whether the reduction in the number of
shares of Universal Common Stock that might otherwise trade, or the termination
of registration of outstanding shares of Universal Common Stock, would have an
adverse effect on the market price for or the marketability of the shares of
Universal Common Stock.
 
    99CENTS Only Stores intends to seek termination of registration of the
shares of Universal Common Stock under the Exchange Act as soon after the
completion of the Exchange Offer as the requirements for termination are met.
Additionally, it is likely that subsequent to the completion of the Exchange
Offer the shares of Universal Common Stock will no longer qualify for listing on
the Nasdaq National Market and consequently may be delisted. Such termination
and delisting could have a material adverse effect on the market for Universal
Common Stock.
 
    Universal Common Stock is currently a "margin security" under the
regulations of the Board of Governors of the Federal Reserve System (the
"Federal Reserve Board"), which has the effect, among other things, of allowing
brokers to extend credit on the collateral of the Universal Common Stock.
Depending upon factors similar to those described above regarding listing and
market quotations, it is possible that, following the Exchange Offer, the
Universal Common Stock would no longer constitute a "margin security" for the
purposes of the margin regulations of the Federal Reserve Board and therefore
could no longer be used as collateral for loans made by brokers. If registration
of Universal Common Stock under the Exchange Act were terminated, the Universal
Common Stock would no longer be a "margin security" or be eligible for reporting
on the Nasdaq National Market.
 
    Further, 99CENTS Only Stores does not currently intend to merge Universal
with 99CENTS Only Stores. Consequently, if the Company's Exchange Offer is
successful, shareholders of Universal who do not tender may have to retain their
investment indefinitely. 99CENTS Only Stores has no current intention to pay
dividends on the Universal Shares.
 
LISTING OF UNIVERSAL EXCHANGE CONSIDERATION
 
    The 99CENTS Only Stores Common Stock is listed on the New York Stock
Exchange. Application will be made to list the 99CENTS Only Stores Common Stock
issuable in connection with the Exchange Offer on the New York Stock Exchange.
 
FEES AND EXPENSES
 
    Houlihan Lokey provided an opinion to the Board of Directors of 99CENTS Only
Stores to the effect that as of the date of such opinion, the Universal Exchange
Consideration to be furnished by 99CENTS Only Stores is fair to the holders of
Universal Common Stock (other than 99CENTS Only Stores) from a
 
                                       45

financial point of view. In connection with such services, 99CENTS Only Stores
has agreed to pay to Houlihan Lokey an aggregate fee of $75,000. 99CENTS Only
Stores has also agreed to indemnify Houlihan Lokey and its affiliates against
certain claims and liabilities to which they may become subject, including
liabilities under the federal securities laws. See "BACKGROUND OF THE
TRANSACTION AND RELATED MATTERS--Opinion of 99CENTS Only Stores' Financial
Advisor."
 
    99CENTS Only Stores has retained                   to act as the Information
Agent and                   to act as the Exchange Agent in connection with the
Exchange Offer. The Information Agent may contact holders of Universal Common
Stock by mail, telephone, telex, telegraph and personal interview and may
request brokers, dealers and other nominee holders of Universal Common Stock to
forward materials relating to the Exchange Offer to beneficial owners. The
Information Agent and the Exchange Agent each will receive reasonable and
customary compensation for their respective services, will be reimbursed for
certain reasonable out-of-pocket expenses and will be indemnified against
certain liabilities in connection therewith, including certain liabilities under
the federal securities laws.
 
    Except as described above, 99CENTS Only Stores will not pay any fees or
commission to any broker or dealer or any other person for soliciting tenders of
Universal Common Stock pursuant to the Exchange Offer. Brokers, dealers,
commercial banks and trust companies will, upon request, be reimbursed by
99CENTS Only Stores for reasonable and necessary costs and expenses incurred by
them in forwarding materials to their customers.
 
SOURCE OF FUNDS
 
    99CENTS Only Stores expects to obtain the funds for (i) amounts payable in
lieu of fractional shares of Universal Common Stock which would otherwise be
issuable in connection with the Exchange Offer and (ii) fees and expenses
related to the Exchange Offer, from a combination of available cash and cash
equivalents.
 
REGULATORY APPROVALS
 
    Under the HSR Act and the rules that have been promulgated thereunder by the
Federal Trade Commission (the "FTC"), certain acquisition transactions may not
be consummated unless certain information has been furnished to the Antitrust
Division of the Department of Justice (the "Antitrust Division") and the FTC and
certain waiting period requirements have been satisfied. The acquisition of the
Universal Common Stock pursuant to the Exchange Offer is subject to the HSR Act.
 
    On April 21, 1998, 99CENTS Only Stores filed with the Antitrust Division and
the FTC its Hart-Scott-Rodino Notification and Report Forms with respect to the
Exchange Offer. Under the applicable provisions of the HSR Act, the acquisition
of Universal Common Stock under the Exchange Offer cannot be consummated until
the expiration of a 30-day waiting period following the filing of such forms by
99CENTS Only Stores. Pursuant to the HSR Act, 99CENTS Only Stores has requested
early termination of the waiting period applicable to the Exchange Offer. There
can be no assurance, however, that either the 30-day HSR Act waiting period will
be terminated early or that additional information or documentary material will
not be requested. If the acquisition of shares is delayed pursuant to a request
by the FTC or the Antitrust Division for additional information or documentary
material pursuant to the HSR Act, the Offer may, but need not, be extended and,
in any event, the purchase of and payment for shares will be deferred until 10
days after the request is substantially complied with, unless the extended
period expires on or before the date when the initial 30-day period would
otherwise have expired, or unless the waiting period is sooner terminated by the
FTC and the Antitrust Division. Only one extension of such waiting period
pursuant to a request for additional information is authorized by the HSR Act
and the rules promulgated thereunder, except by court order. Any such extension
of the waiting period will not give rise to any withdrawal rights not otherwise
provided for by applicable law. It is a condition to the Exchange
 
                                       46

Offer that the waiting period applicable under the HSR Act to the Exchange Offer
expire or be terminated. "THE EXCHANGE OFFER--Conditions to the Offer".
 
    Federal and state antitrust enforcement agencies frequently scrutinize the
legality under the antitrust laws of transactions such as 99CENTS Only Stores'
acquisition of the Universal Common Stock pursuant to the Exchange Offer. At any
time before or after 99CENTS Only Stores' acquisition of Universal Common Stock,
any such agency could take such action under the antitrust laws as it deems
necessary or desirable in the public interest, including seeking to enjoin the
acquisition of Universal Common Stock in the Exchange Offer or otherwise seeking
divestiture of Universal Common Stock acquired by 99CENTS Only Stores or
divestiture of substantial assets of 99CENTS Only Stores and/or Universal.
Private parties may also bring legal action under the antitrust laws under
certain circumstances.
 
    Based upon an examination of publicly available information relating to the
business in which both 99CENTS Only Stores and Universal are engaged, 99CENTS
Only Stores believes that the Exchange Offer will not violate antitrust laws.
Nevertheless, there can be no assurance that a challenge to the Exchange Offer
on antitrust grounds will not be made or that, if such a challenge is made,
99CENTS Only Stores will prevail. See "--Certain Conditions of the Exchange
Offer."
 
    Based upon an examination of publicly available information filed by
Universal with the Commission and other publicly available information with
respect to Universal, except as disclosed above, 99CENTS Only Stores is not
aware of any license or regulatory permit or any other approval or other action
by any state, federal or foreign government or governmental agency that would be
required prior to the acquisition of Universal Common Stock pursuant to the
Exchange Offer or would be required in connection with the Exchange Offer and
which if not obtained, in any such case, would have a material adverse effect on
99CENTS Only Stores or Universal or either of their respective businesses. There
can be no assurance that any license, permit, approval or other action, if
needed, would be obtained or, if so obtained, when, or that adverse consequences
might not result to 99CENTS Only Stores or Universal or to their respective
businesses in the event of adverse regulatory action or inaction.
 
MISCELLANEOUS
 
    99CENTS Only Stores is not aware of any jurisdiction where the making of the
Exchange Offer or the acceptance thereof would not be in compliance with
applicable law. If 99CENTS Only Stores becomes aware of any jurisdiction where
the making of the Exchange Offer or acceptance thereof would not be in
compliance with any valid, applicable law, 99CENTS Only Stores will make a good
faith effort to comply with such law. If, after such good faith effort, 99CENTS
Only Stores cannot comply with such law, the Exchange Offer will not be made to,
nor will tenders be accepted from or on behalf of, holders of Universal Common
Stock in any such jurisdiction.
 
    In any jurisdiction where the securities, blue sky or other laws require the
Exchange Offer to be made by a licensed broker or dealer, the Exchange Offer
shall be deemed to be made on behalf of 99CENTS Only Stores by the Dealer
Manager or by one or more registered brokers or dealers licensed under the laws
of such jurisdiction.
 
    No person is authorized to give any information or make any representation
on behalf of 99CENTS Only Stores not contained in this Proxy
Statement/Prospectus or in the Letter of Transmittal and, if given or made, such
information or representation must not be relied upon as having been authorized.
 
    Pursuant to Rule 14d-3 of the General Rules and Regulations under the
Exchange Act, 99CENTS Only Stores has filed with the Commission the Schedule
14D-1, together with exhibits, furnishing certain additional information with
respect to the Exchange Offer. The Schedule 14D-1 and any amendments thereto,
including exhibits, may be inspected at, and copies may be obtained from, the
same
 
                                       47

places and in the same manner as set forth in "AVAILABLE INFORMATION" (except
that they will not be available at the regional offices of the Commission).
 
ACCOUNTING TREATMENT
 
    Under applicable accounting standards, the Exchange Offer will be treated as
a purchase of Universal by 99CENTS Only Stores.
 
CERTAIN FEDERAL INCOME TAX CONSEQUENCES
 
    The receipt of Universal Exchange Consideration for shares pursuant to the
Exchange Offer will be a taxable transaction for federal income tax purposes and
may also be a taxable transaction under applicable state, local or foreign tax
laws. In general, a shareholder will recognize gain or loss for federal income
tax purposes equal to the difference between the fair market value of the
Universal Exchange Consideration and such shareholder's adjusted tax basis in
such shares. Assuming the shares constitute capital assets in the hands of the
shareholder, such gain or loss will be capital gain or loss. Capital gain
generally will be taxed to an individual stockholder at a maximum rate of 20
percent with respect to shares held for more than 18 months and generally will
be taxed at a maximum rate of 28 percent with respect to shares held for more
than one year but not more than 18 months. The tax rates applicable to ordinary
income will apply to the sale or exchange of shares held for one year or less.
The highest marginal income tax rate applicable to an individual shareholder is
39.6%. Capital losses not offset by capital gains may be deducted against an
individual shareholder's ordinary income up to a maximum annual amount of
$3,000. Unused capital losses may be carried forward indefinitely by an
individual stockholder. All net capital gain of a corporate shareholder is
subject to tax at ordinary corporate rates. A corporate shareholder can deduct
capital losses only to the extent of capital gains, with unused losses being
carried back three years and forward five years.
 
    THE FOREGOING DISCUSSION MAY NOT BE APPLICABLE TO CERTAIN TYPES OF
SHAREHOLDERS, SUCH AS FINANCIAL INSTITUTIONS, BROKER-DEALERS, PERSONS WHO
RECEIVED PAYMENT IN RESPECT OF OPTIONS TO ACQUIRE SHARES, SHAREHOLDERS WHO
ACQUIRED SHARES PURSUANT TO THE EXERCISE OF EMPLOYEE STOCK OPTIONS OR OTHERWISE
AS COMPENSATION, INDIVIDUALS WHO ARE NOT CITIZENS OR RESIDENTS OF THE UNITED
STATES AND FOREIGN CORPORATIONS.
 
    THE FEDERAL INCOME TAX DISCUSSION SET FORTH ABOVE IS INCLUDED FOR GENERAL
INFORMATION ONLY AND IS BASED UPON PRESENT LAW. SHAREHOLDERS ARE URGED TO
CONSULT THEIR TAX ADVISORS WITH RESPECT TO THE SPECIFIC TAX CONSEQUENCES OF THE
EXCHANGE OFFER TO THEM, INCLUDING THE APPLICATION AND EFFECT OF THE ALTERNATIVE
MINIMUM TAX, AND STATE, LOCAL AND FOREIGN INCOME AND OTHER TAX LAWS AND CHANGES
IN SUCH TAX LAWS.
 
                                       48

                     AGREEMENTS RELATING TO EXCHANGE OFFER
 
THE COOPERATION AGREEMENT
 
    In connection with the Exchange Offer, 99CENTS Only Stores and Universal
entered into the Cooperation Agreement. The Cooperation Agreement provides that
Universal will support the Exchange Offer and will provide 99CENTS Only Stores
access to the books and records of Universal, as well as to Universal's officers
and directors for purposes of preparing filings and completing due diligence. In
addition, Universal agreed to file a Schedule 14D-9 with respect to the Exchange
Offer and agreed that Universal would not oppose the Exchange Offer in the
Schedule 14D-9. Universal also agreed to promptly furnish to 99CENTS Only Stores
with mailing labels, security position listings and any other available listing
or computer file containing the names and addresses of the record holders of
Universal Common Stock for purposes of mailing the Exchange Offer Documents.
 
    Promptly upon the purchase by 99CENTS Only Stores of Universal Shares
pursuant to the Exchange Offer (provided that not less than 32% of the
outstanding shares of Universal Common Stock are validly tendered and not
withdrawn (the "Minimum Condition")(other than the shares owned by 99CENTS Only
Stores)) and from time to time thereafter, 99CENTS Only Stores shall be
entitled, subject to compliance with Section 14(f) of the Exchange Act, to
designate up to such number of directors, rounded down to the next whole number
(except where such rounding down would cause 99CENTS Only Stores to not be
entitled to designate at least a majority of directors on the Board, in which
case, such number will be rounded up) on the Board of Directors of Universal as
will give 99CENTS Only Stores representation on the Board equal to the product
of the number of directors on the Board (giving effect to the directors elected
pursuant to this sentence) multiplied by the percentage that the aggregate
number of shares of Universal Common Stock then beneficially owned by 99CENTS
Only Stores and its affiliates following such purchase bears to the total number
of shares of Universal Common Stock then outstanding. In the Cooperation
Agreement, Universal has agreed to promptly take all actions necessary to cause
99CENTS Only Stores' designees to be elected or appointed as directors of
Universal, including increasing the size of the Board or securing the
resignations of incumbent directors or both.
 
    Universal also agreed to assist 99CENTS Only Stores in obtaining the
approval of its shareholders under the Minnesota Control Share Acquisition Act
to provide voting rights to the Universal Common Stock acquired by 99CENTS Only
Stores in the Exchange Offer. Universal further agreed to take all action
necessary to either (a) amend the Rights Agreement so that the Exchange Offer
would not cause (i) the occurrence of the "Distribution Date" (as such term is
defined in the Rights Agreement) or (ii) the common stock purchase rights issued
pursuant to the Rights Agreement becoming evidenced by, and transferable
pursuant to, certificates separate from the certificates representing the
Universal Common Stock or (b) redeem the rights before 99CENTS Only Stores
becomes an "Acquiring Person" pursuant to the terms of the Rights Agreement.
 
    According to Universal's Annual Report on Form 10-K for the year ended
December 31, 1997, as of March 17, 1998, 9,393,328 shares of Universal Common
Stock were issued and outstanding. As a result, as of such date, the Minimum
Condition would be satisfied if 99CENTS Only Stores acquired 3,014,662 Universal
Shares, assuming no further issuances of shares by Universal.
 
STOCKHOLDER SUPPORT AGREEMENTS
 
    On February 24, 1998, 99CENTS Only Stores and each of Mark Ravich, Norman
Ravich and certain trusts for which Mark Ravich is the trustee entered into
separate Stockholder Support Agreements in which each stockholder agreed to vote
its shares of Universal Common Stock (i) in favor of the Exchange Offer and (ii)
in favor of any other matter deemed necessary by 99CENTS Only Stores to
effectuate the Exchange Offer or solicited in connection with the Exchange
Offer, and considered and voted upon by the shareholders of Universal. In
addition, each shareholder executing a Stockholder Support Agreement agreed to
tender and sell all of its Universal Common Stock to 99CENTS Only Stores
pursuant to the terms of the Exchange Offer.
 
                                       49

CONSULTING AGREEMENTS AND OPTION AGREEMENTS WITH CERTAIN SHAREHOLDERS
 
    Furthermore, on February 24, 1998, Mark Ravich entered into a Consulting
Agreement with 99CENTS Only Stores whereby Mark Ravich agreed to provide
advisory services to 99CENTS Only Stores in connection with the Exchange Offer
and thereafter to provide sales, management and operations consulting services
in connection with the operation of the business of Universal following
completion of the Exchange Offer. The term of the consulting agreement ends
February 24, 1999. As compensation for the consulting services provided, 99CENTS
Only Stores granted to Mark Ravich an option to acquire 9,375 shares of 99CENTS
Only Stores Common Stock at $40.00 per share, and an option to acquire 15,000
shares of 99CENTS Only Stores Common Stock at $33.5625 per share pursuant to
separate Option Agreements each dated as of February 26, 1998. Each of the
options terminates on the earlier to occur of a termination of the Exchange
Offer and February 19, 2005. Each of the options becomes fully exercisable on
the first business day following consummation of the Exchange Offer.
 
    On February 26, 1998, Norman Ravich also entered into a Consulting Agreement
with 99CENTS Only Stores whereby Norman Ravich agreed to provide advisory
services to 99CENTS Only Stores in connection with the Exchange Offer and
thereafter to provide sales, management and operation consulting services in
connection with the operation of the business of Universal following completion
of the Exchange Offer. The Consulting Agreement ends on May 27, 1998. As
compensation for the consulting services provided, 99CENTS Only Stores granted
to Norman Ravich an option to purchase 4,688 shares of 99CENTS Only Stores
Common Stock at $40.00 per share pursuant to a separate option agreement dated
February 26, 1998. The option terminates on the earlier to occur of a
termination of the Exchange Offer and February 19, 2005. The option becomes
fully exercisable on the first business day following consummation of the
Exchange Offer.
 
                 CERTAIN LEGAL MATTERS AND REGULATORY APPROVALS
 
GENERAL
 
    Based upon its examination of publicly available information with respect to
Universal and the review of certain information furnished by Universal to
99CENTS Only Stores and discussions of representatives of 99CENTS Only Stores
with representatives of Universal during 99CENTS Only Stores' investigation of
Universal, 99CENTS Only Stores is not aware of any license or other regulatory
permit that appears to be material to the business of Universal and its
subsidiaries, taken as a whole, which might be adversely affected by the
acquisition of shares by 99CENTS Only Stores pursuant to the Exchange Offer, or,
except as set forth below, of any approval or other action by any domestic
(federal or state) or foreign governmental, administrative or regulatory
authority or agency which would be required prior to the acquisition of shares
by 99CENTS Only Stores pursuant to the Exchange Offer. Should any such approval
or other action be required, it is 99CENTS Only Stores' present intention to
seek such approval or action. 99CENTS Only Stores does not currently intend,
however, to delay the purchase of shares tendered pursuant to the Exchange Offer
pending the outcome of any such action or the receipt of any such approval
(subject to 99CENTS Only Stores' right to decline to purchase shares if the
conditions relating to the HSR Act or any of the other conditions in "THE
EXCHANGE OFFER--Conditions to the Exchange Offer" shall have occurred). There
can be no assurance that any such approval or other action, if needed, would be
obtained without substantial conditions or that adverse consequences might not
result to the business of Universal or 99CENTS Only Stores or that certain parts
of the businesses of Universal or 99CENTS Only Stores might not have to be
disposed of or held separate or other substantial conditions complied with in
order to obtain such approval or other action or in the event that such approval
was not obtained or such other action was not taken. 99CENTS Only Stores'
obligation under the Exchange Offer to accept for payment and pay for shares is
subject to certain conditions, including conditions relating to the legal
matters discussed in this "Certain Legal Matters and Regulatory Approvals." See
"THE EXCHANGE OFFER--Conditions to the Exchange Offer".
 
                                       50

STATE TAKEOVER LAWS
 
    Section 673 of the MBCA generally provides that a publicly-held Minnesota
corporation may not engage in any business combination (defined to include a
variety of transactions, including mergers), or vote, consent or otherwise act
to authorize any of its subsidiaries to engage in a business combination, with
any Interested Shareholder (defined to include, among others, any person who
beneficially owns or controls 10% or more of a corporation's outstanding voting
stock) for a period of four years following the date such person became an
Interested Shareholder, unless before such person became an Interested
Shareholder, a committee consisting of all disinterested directors of the
corporation approved the business combination or approved the transaction in
which the Interested Shareholder became an Interested Shareholder. In November
1997, 99CENTS Only Stores became an Interested Shareholder of Universal when it
acquired 48% of Universal's Common Stock. 99CENTS Only Stores' acquisition of
Universal Common Stock, while unanimously approved by Universal's full Board of
Directors, was not approved by a separate committee consisting solely of
disinterested directors. Because a committee of the Board of Directors of
Universal consisting of all of the disinterested directors of Universal was not
formed pursuant to Section 673 of the MBCA in connection with the November 17
Acquisition, 99CENTS Only Stores may be unable to consummate a merger with
Universal following the Exchange Offer.
 
    Section 671 of the MBCA generally provides that a shareholder beneficially
owning stock with 20%, 33 1/3 % or 50% or more of the voting power of the
outstanding capital stock of a publicly held corporation or certain other
corporations cannot vote more than 20%, 33 1/3 % or 50%, respectively of the
total voting power of the outstanding stock of the corporation unless voting
rights are approved by (i) the affirmative vote of the holders of a majority of
all shares entitled to vote and (ii) the affirmative vote of the holders of a
majority of all outstanding shares entitled to vote, excluding Interested
Shares. On            , 1998, shareholders of Universal will vote pursuant to
Section 671 of the MBCA. See "THE UNIVERSAL SPECIAL MEETING."
 
    Chapter 80B of the MBCA ("Chapter 80B") generally provides that it is
unlawful for any person to make a takeover offer unless a registration statement
on the form prescribed by the Minnesota Commissioner of Commerce shall have been
filed with the Commissioner of Commerce and delivered to the target company, and
the material terms of and certain specified information shall be delivered to
all offerees residing in Minnesota as soon as practicable after the filing of
such registration statement. 99CENTS Only Stores intends to comply with Chapter
80B in connection with the Exchange Offer.
 
    99CENTS Only Stores does not believe that any state takeover laws, other
than Section 673 of the MBCA, Section 671 of the MBCA and Chapter 80B, apply to
the Exchange Offer and it has not complied with any other state takeover laws.
If 99CENTS Only Stores becomes aware of any valid state statute prohibiting the
making of the Exchange Offer or the acceptance of shares pursuant thereto,
99CENTS Only Stores will make a good faith effort to comply with such statute.
If, after such good faith effort, 99CENTS Only Stores cannot comply with such
state statute, the Exchange Offer will not be made to (nor will tenders be
accepted from or on behalf of) the holders of shares of Universal Common Stock
in such state. See "THE EXCHANGE OFFER--Conditions to the Exchange Offer".
 
    Universal, directly or through subsidiaries, conducts business in a number
of states throughout the United States in addition to Minnesota, some of which
have also enacted takeover laws. 99CENTS Only Stores does not know whether any
of the laws of these states will, by their terms, apply to the Exchange Offer
and has not complied with any such laws. Should any person seek to apply any
state takeover law in addition to those of Minnesota, 99CENTS Only Stores will
take such action as then appears desirable, which may include challenging the
validity or applicability of any such statute in appropriate court proceedings.
In the event it is asserted that one or more state takeover laws is applicable
to the Exchange Offer, and an appropriate court does not determine that it is
inapplicable or invalid as applied to the Exchange Offer, 99CENTS Only Stores
might be required to file certain information with, or receive approvals from,
the relevant state authorities. In addition, if enjoined, 99CENTS Only Stores
might be unable to accept for payment any shares tendered pursuant to the
Exchange Offer, or be delayed in
 
                                       51

continuing or consummating the Exchange Offer. In such case, 99CENTS Only Stores
may not be obligated to accept for payment any shares tendered. See "THE
EXCHANGE OFFER--Conditions to the Exchange Offer".
 
      MANAGEMENT OF 99CENTS ONLY STORES UPON COMPLETION OF EXCHANGE OFFER
 
    The management of 99 CENTS Only Stores and the 99 CENTS Only Stores Board of
Directors will be unaffected by the Exchange Offer. The Cooperation Agreement
provides that if 99 CENTS Only Stores acquires at least a majority of the
Universal Common Stock pursuant to the Exchange Offer, 99 CENTS Only Stores will
be entitled to designate for appointment or election to Universal's Board, upon
written notice to Universal, that number of directors which reflects 99 CENTS
Only Stores' proportional ownership of Universal Common Stock. The following
sets forth certain information as of March 31, 1998 with respect to each
director, executive officer and key employee of 99 CENTS Only Stores:


DIRECTORS AND EXECUTIVE OFFICERS             AGE                                   POSITION
- ---------------------------------------      ---      -------------------------------------------------------------------
                                                
David Gold.............................          65   Chairman of the Board and Chief Executive Officer
Howard Gold............................          38   Senior Vice President of Distribution and Director
Eric Schiffer..........................          37   Senior Vice President of Finance and Operations, Treasurer and
                                                        Director
Jeff Gold..............................          30   Senior Vice President of Real Estate and Information Systems and
                                                        Director
Andy Farina............................          51   Chief Financial Officer
Helen Pipkin...........................          55   Senior Vice President of Wholesale Operations
William O. Christy.....................          66   Director
Marvin Holen...........................          68   Director
Ben Schwartz...........................          80   Director
Lawrence Glascott......................          63   Director
 

 
CERTAIN KEY EMPLOYEES
- ---------------------------------------
                                                
Larry Borenstein.......................          46   Vice President of Construction and Advertising
Carolyn J. Brock.......................          47   Vice President of Human Resources
Jose Gomez.............................          38   Vice President of Retail Operations
Kenneth R. Phipps......................          47   Vice President of Distribution

 
    The executive officers of the Company are appointed by and serve at the
discretion of the Board of Directors. David Gold is the father of Howard Gold
and Jeff Gold and the father-in-law of Eric Schiffer.
 
    DAVID GOLD has been Chairman of the Board and Chief Executive Officer of the
Company since the founding of the Company in 1965. Mr. Gold has over 40 years of
retail experience and 20 years of wholesale experience.
 
    HOWARD GOLD has been a director of the Company since 1991. He joined the
Company in 1982 and has served in various managerial capacities. He currently
serves as Senior Vice President of Distribution. Mr. Gold received his B.S.
degree from the University of California at Los Angeles in 1984.
 
    ERIC SCHIFFER has been a director of the Company since 1991. He joined the
Company in 1992 and served in various managerial capacities. He currently serves
as Senior Vice President of Finance and Operations and Treasurer. Prior to
joining the Company, from 1987 to 1992, he was employed by Oxford Partners, a
venture capital firm. Mr. Schiffer received his B.S.E. degree from Duke
University in 1983 and his M.B.A. from the Harvard Business School in 1987.
 
    JEFF GOLD has been a director of the Company since 1991. He joined the
Company in 1984 and has served in various managerial capacities since 1989. He
currently serves as Senior Vice President of Real
 
                                       52

Estate and Information Systems. Mr. Gold received his B.A. degree from the
University of California at Berkeley in 1989.
 
    ANDY FARINA joined the Company in September 1996 as Chief Financial Officer.
Prior to joining the Company, from April 1993 through August 1996, Mr. Farina
was Vice President of Finance of Crown BBK, Inc., a food brokerage business. Mr.
Farina was employed by a division of Sara Lee from 1976 through 1988, ultimately
in the capacity of President. Mr. Farina began his career with Arthur Andersen
LLP.
 
    HELEN PIPKIN joined the Company in 1991 and serves as Senior Vice President
of Wholesale Operations. Prior to joining the Company, from 1985 through 1991,
Ms. Pipkin served as Controller and Manager of Wholesale and Import Operations
of Cobra Associated International, a wholesaler of variety merchandise. Prior to
1985, for many years Ms. Pipkin was an owner, Vice President and Controller of
Markell Imports, a general merchandise wholesaler.
 
    WILLIAM O. CHRISTY has been a director of the Company since 1992. He was
President and Chief Executive Officer of Certified Grocers of California from
1977 to 1990 where he spent the majority of his career. He has served on
numerous trade association boards including the executive committee of the
National Grocers Association Board and Chairman of the Merchant and Manufacturer
Association Board.
 
    MARVIN HOLEN has been a director of the Company since 1991. He is an
attorney and in 1960 founded the law firm of Van Petten & Holen. He served on
the Board of the Southern Californian Rapid Transit District from 1976 to 1993
(six of those years as the Board's President). He also served on the Board of
Trustees of California Blue Shield from 1972 to 1978, on the Board of United
California Savings Bank from 1992 to 1994 and on several other corporate,
financial institution and philanthropic boards of directors.
 
    BEN SCHWARTZ has been a director of the Company since 1993. He was Chairman
of Foods Company Markets, a supermarket chain, from 1980 until it was acquired
in 1987 by Boys Markets. Prior thereto, he served for many years as its
president. He has also served on the Board of Directors of Certified Grocers of
California including four years as Chairman. Additionally, Mr. Schwartz sits on
a number of industry trade boards, including the Food Marketing Institute (FMI).
 
    LAWRENCE GLASCOTT has been a director of the Company since October 1996. He
was the former Vice President--Finance of Waste Management International. Prior
thereto, Mr. Glascott was a partner at Arthur Andersen LLP and was the Arthur
Andersen LLP partner in charge of the 99 CENTS Only Stores account for six
years. Additionally, Mr. Glascott was in charge of the Los Angeles based Arthur
Andersen LLP Enterprise Group practice for over 15 years.
 
CERTAIN KEY EMPLOYEES:
 
    LARRY BORENSTEIN joined the Company in 1984 and currently serves as Vice
President of Construction and Advertising. Mr. Borenstein has also served in
various other managerial capacities within the Company.
 
    CAROLYN J. BROCK joined the Company in 1994 and currently serves as Vice
President of Human Resources. During 1993 and 1994, Ms. Brock was employed by
Dodge, Warren & Peters Consultants, Inc., a consulting firm, where she served as
Executive Vice President. From 1992 to 1993, she was an owner and the Vice
President of Comp Solutions, a worker's compensation consulting firm. From 1990
to 1992, she was the President of Employers Management Services, a human
resources consulting firm.
 
    JOSE GOMEZ joined the Company in 1980 and has served in many different
managerial capacities, most recently as Vice President of Retail Operations. He
has over 20 years of retail experience.
 
    KENNETH R. PHIPPS joined the Company in 1993 and serves as Vice President of
Distribution. From 1991 until 1993, Mr. Phipps served as Director of Operations
for SE Rykoff Inc., a large food wholesaler. From 1970 to 1991, Mr. Phipps was
employed by Lucky Stores, Inc., a large grocery chain, where his
 
                                       53

responsibilities included, at various times, serving as the distribution center
manager at three Lucky's facilities.
 
                         THE UNIVERSAL SPECIAL MEETING
 
TIME, DATE AND PLACE
 
    The Universal Special Meeting will be held at     [a.m.] (local time) on
           , 1998 at             . This Proxy Statement/Prospectus is being sent
to holders of Universal Common Stock and is accompanied by the form of proxy
which is being solicited by 99CENTS Only Stores for use at the Universal Special
Meeting and at any adjournment or postponement thereof.
 
PURPOSE OF THE UNIVERSAL SPECIAL MEETING
 
    The Minnesota Business Corporation Act (the "MBCA") defines a "control share
acquisition" as an acquisition, directly or indirectly, by an acquiring person
of beneficial ownership of shares of a subject corporation that, but for the
Minnesota Control Share Acquisition Act ("Section 671 of the MBCA"), would, when
added to all other shares of the subject corporation beneficially owned by the
acquiring person, entitle the acquiring person, immediately after the
acquisition, to exercise or direct the exercise of a new range of voting power
of the subject corporation within any of the following ranges: (i) at least 20
percent but less than 33 1/3 percent; (ii) at least 33 1/3 percent but less than
or equal to 50 percent; and (iii) over 50 percent. Section 671 of the MBCA
provides that shares acquired in a control share acquisition in excess of any of
the aforementioned thresholds will have no voting rights, unless voting rights
are accorded such shares by a vote of the shareholders. Thus, in accordance with
Section 671 of the MBCA, Universal Shares acquired by 99CENTS Only Stores in the
Exchange Offer, in excess of 50 percent of the outstanding Universal Shares,
will have no voting rights, unless voting rights for such Universal Shares are
approved by a shareholder vote at the Universal Special Meeting. Consummation of
the Exchange Offer is conditioned upon, among other things, the approval of
voting rights for the Universal Shares acquired by 99CENTS Only Stores in the
Exchange Offer. This matter will be considered and voted upon by the holders of
Universal Shares at the Universal Special Meeting.
 
    Under Section 671 of the MBCA, the resolution to accord voting rights to
Universal Shares acquired by 99CENTS Only Stores in the Exchange Offer must
receive the approval of both (i) the affirmative vote of the holders of a
majority of all outstanding Universal Shares entitled to vote, and (ii) the
affirmative vote of the holders of a majority of all Universal Shares entitled
to vote, excluding Interested Shares. Under Section 671 of the MBCA, "interested
shares" means shares held by an Acquiring Person (defined in Section 671 of the
MBCA as a person that makes or proposes to make a control share acquisition),
any officer of Universal and any employee of Universal who is also a director of
Universal. In the case of the Exchange Offer, the Acquiring Person means 99CENTS
Only Stores and its affiliates.
 
    On            , 1998, 99CENTS Only Stores delivered to Universal an
information statement (the "Information Statement") in accordance with Section
671 of the MBCA and requested that Universal call a special meeting of
shareholders to consider the voting rights to be accorded the Universal Shares
to be acquired by 99CENTS Only Stores pursuant to the Exchange Offer. A copy of
the Information Statement is attached hereto as Appendix "C". Under Section 671
of the MBCA, if the shareholders of Universal approve voting rights for
Universal Shares to be acquired in the Exchange Offer, such approval will cover
any Universal Shares acquired in the Exchange Offer during the 180-day period
immediately following the date of such approval.
 
UNIVERSAL RECORD DATE, QUORUM AND VOTE REQUIRED
 
    The Universal Board of Directors has fixed the close of business on
           , 1998 as the Universal Record Date for the determination of
shareholders entitled to notice of, or to vote at, the Universal Special Meeting
and any of its adjournments or postponements (the "Universal Record Date"). At
the Universal Record Date,       Universal Shares were outstanding. The
Universal Shares are the
 
                                       54

only outstanding shares of capital stock of Universal entitled to vote at the
Universal Special Meeting. Each holder of record of Universal Shares on the
Universal Record Date is entitled to cast one vote per share, in person or by
proxy, on all maters submitted to the shareholders for approval at the Universal
Special Meeting. The presence at the Universal Special Meeting, in person or by
proxy, of the holders of a majority of the Universal Shares entitled to vote at
the Universal Special Meeting is necessary to constitute a quorum.
 
    The approval of voting rights with respect to Universal Shares acquired by
99CENTS Only Stores in the Exchange Offer (the "99CENTS Only Stores Voting
Rights") requires the affirmative vote, in person or by proxy, of (i) a majority
of all outstanding Universal Shares entitled to vote at the Universal Special
Meeting, and (ii) a majority of all Universal Shares entitled to vote at the
Universal Special Meeting, excluding Interested Shares. At the Universal Record
Date, 99CENTS Only Stores beneficially owned 4,500,000 Universal Shares, and
Universal's officers and its employees who are also directors beneficially owned
      Universal Shares, representing in the aggregate approximately    % of the
outstanding Universal Shares. Accordingly, to approve voting rights for
Universal Shares acquired in the Exchange Offer, the affirmative vote of the
holders of       Universal Shares (including Interested Shares) and
Universal Shares (excluding Interested Shares) is required.
 
    THE CONSUMMATION OF THE EXCHANGE OFFER IS CONDITIONED UPON A FAVORABLE VOTE
OF UNIVERSAL'S SHAREHOLDERS WITH RESPECT TO 99CENTS ONLY STORES VOTING RIGHTS.
ACCORDINGLY, IT IS OF THE UTMOST IMPORTANCE THAT SHAREHOLDERS WHO WISH TO TENDER
THEIR SHARES TO 99CENTS ONLY STORES IN CONNECTION WITH THE EXCHANGE OFFER VOTE
"FOR" THE APPROVAL OF SUCH VOTING RIGHTS.
 
NO RECOMMENDATION OF THE UNIVERSAL BOARD OF DIRECTORS
 
    Although Houlihan Lokey has delivered an opinion to the Board of Directors
of 99CENTS Only Stores to the effect that as of the date of such opinion, the
Exchange Consideration to be furnished by 99CENTS Only Stores is fair to the
holders of Universal Common Stock (other than 99CENTS Only Stores) from a
financial point of view, due to the composition of the Board of Universal
including three designees of 99CENTS Only Stores and two designees of Universal,
the Universal Board of Directors has decided to remain neutral with respect to
the Exchange Offer and has not made a determination that the Exchange Offer is
fair to or in the best interests of Universal and its shareholders and neither
recommends a vote for or a vote against the approval of 99CENTS Only Stores
Voting Rights. However, Universal has agreed to support the Exchange Offer and
to assist 99CENTS Only Stores on its solicitation of the Universal shareholders.
See "The Cooperation Agreement" and "Background of the Exchange Offer and
Related Maters--No Recommendation of the Universal Board of Directors."
 
PROXIES; REVOCABILITY OF PROXIES
 
    All Universal Shares represented by properly executed proxies received prior
to or at the Universal Special Meeting, and not revoked, will be voted in
accordance with the instructions indicated in such proxies. A properly executed
proxy marked "ABSTAIN," however, although counted for purposes of determining
whether there is a quorum at the Universal Special Meeting, will not be voted in
favor of the 99CENTS Only Stores Voting Rights. If no instructions are
indicated, such proxies will be voted FOR the 99 CENTS Only Stores Voting
Rights. Broker non-votes will not be counted for purposes of determining the
presence of a quorum at the Universal Special Meeting and will have no effect on
the vote. A shareholder may revoke his or her proxy at any time prior to its use
by delivering to the Chief Financial Officer of 99 CENTS Only Stores a signed
notice of revocation or a later dated signed proxy, by attending the Universal
Special Meeting and voting in person or by giving notice of revocation of the
proxy at the Universal Special Meeting. Attendance at the Universal Special
Meeting will not in itself constitute the revocation of a proxy. Prior to the
Universal Special Meeting, any written notice of revocation or subsequent proxy
should be sent so as to be delivered to 99CENTS Only Stores, 4000 Union Pacific
Avenue, City of Commerce,
 
                                       55

California 90023, Attention: Chief Financial Officer, or hand delivered to the
Chief Financial Officer of 99CENTS Only Stores at the aforementioned address, at
or before the taking of the vote at the Universal Special Meeting.
 
APPRAISAL RIGHTS
 
    Holders of Universal Common Stock will not be entitled to appraisal rights
in connection with the Exchange Offer.
 
PROXY SOLICITATION
 
    All expenses of this solicitation in connection with the Universal Special
Meeting, including the cost of preparing and mailing this Proxy
Statement/Prospectus, will be borne by 99CENTS Only Stores. 99CENTS Only Stores
has retained       at an estimated aggregate cost of $      , plus variable
telephone charges and reimbursement of expenses, to assist in the solicitation
of proxies from brokers, nominees, institutions and individuals. Arrangements
will also be made with custodians, nominees and fiduciaries for forwarding of
proxy solicitation materials to beneficial owners of shares held of record by
such custodians, nominees and fiduciaries, and 99CENTS Only Stores will
reimburse such custodians, nominees and fiduciaries for reasonable expenses
incurred in connection therewith.
 
                                       56

                      COMPARISON OF RIGHTS OF SHAREHOLDERS
                      OF 99CENTS ONLY STORES AND UNIVERSAL
 
    The rights of the Universal shareholders are governed by Universal's
Articles of Incorporation (the "Universal Articles") and By-Laws (the "Universal
By-Laws") and the Minnesota Business Corporation Act (the "MBCA"). Upon
consummation of the Exchange Offer, the Universal shareholders will become
shareholders of 99CENTS Only Stores and their rights as shareholders and the
internal affairs of 99CENTS Only Stores will be governed by the General
Corporation Law of the State of California (the "CGCL") and by 99CENTS Only
Stores' Articles of Incorporation (the "99CENTS Only Stores Articles") and
By-Laws (the "99CENTS Only Stores By-Laws"), which differ in certain material
respects from the Universal Articles and the Universal By-Laws. The following is
a summary of certain differences between the rights of Universal shareholders
compared with those of 99CENTS Only Stores shareholders.
 
    The following discussion of the differences between the Universal Articles
and the Universal By-Laws and the 99CENTS Only Stores Articles and 99CENTS Only
Stores By-Laws is not intended to be complete and is qualified in its entirety
by reference to the articles and by-laws of 99CENTS Only Stores and Universal.
The CGCL and the MBCA are discussed herein as they supplement, modify or limit
the provisions of each company's articles or by-laws. Certain significant
differences which may affect the rights and interests of shareholders are
summarized below in "CERTAIN DIFFERENCES BETWEEN CALIFORNIA AND MINNESOTA
CORPORATION LAW."
 
AUTHORIZED CAPITAL STOCK
 
    UNIVERSAL.  Universal is authorized to issue 75,000,000 shares of Common
Stock, $.05 par value per share. As of March 17, 1998, 9,393,328 shares of
Universal Common Stock were outstanding.
 
    99CENTS ONLY STORES.  99CENTS Only Stores is authorized to issue 40,000,000
shares of Common Stock and 1,000,000 shares of Preferred Stock, no par value.
The Board of Directors of 99CENTS Only Stores is authorized to determine or
alter the rights, preferences, privileges and restrictions granted or imposed
upon any wholly unissued series of Preferred Stock and, within the limitations
or restrictions stated in any Board resolution originally fixing the number of
shares constituting any series, to increase or decrease the number of shares of
any such series subsequent to the issue of shares of that series, to determine
the designation and par value of any series and to fix the number of shares of
any series. As of March 26, 1998, approximately 18,586,111 shares of 99CENTS
Only Stores Common Stock and no shares of 99CENTS Only Stores Preferred Stock
were outstanding.
 
BOARD OF DIRECTORS
 
    UNIVERSAL.  Universal's By-Laws provide that the Universal Board shall
consist of one or more directors as determined by the shareholders prior to the
election of directors. At March 31, 1998, the number of directors constituting
the entire Board was five. A director may serve for a fixed term specified by
the shareholders at the time of election, which shall not exceed five years, or,
if no term is specified at the time of election, the director's term shall
expire at the next regular meeting of shareholders.
 
    99CENTS ONLY STORES.  99CENTS Only Stores' By-Laws provide that the number
of directors constituting the entire Board shall be not less than seven (7) nor
more than eleven (11) as fixed by a duly adopted resolution of the Board. At
March 31, 1998, the number of directors constituting the entire Board was eight
(8). The 99CENTS Only Stores By-Laws also provide that an amendment to the
Articles or the Bylaws reducing the number of directors to a number less than
five cannot be adopted if the votes cast against its adoption at a meeting or
the shares not consenting to its adoption in the case of action by written
consent are equal to more than 16 2/3% of the outstanding shares entitled to
vote.
 
                                       57

REMOVAL OF DIRECTORS
 
    UNIVERSAL.  Under the MBCA, unless modified by the articles, the bylaws or a
shareholder control agreement, any one or all of the directors may be removed at
any time, with or without cause, by the affirmative vote of the holders of the
proportion or number of the voting power of the shares of the classes or series
the director represents sufficient to elect them, except for those corporations
with cumulative voting. The Universal By-Laws provide that any one or all of the
directors may be removed at any time, with or without cause, by the affirmative
vote of the holders of the proportion or number of the voting power of the
shares of the classes or series the director represents sufficient to elect
them.
 
    99CENTS ONLY STORES.  The CGCL provides that any or all directors may be
removed without cause if the removal is approved by the holders of a majority of
the outstanding shares; however, no individual director may be removed (unless
the entire board is removed) if the number of votes cast against removal, or not
consenting in writing to the removal, would be sufficient to elect the director
if voted cumulatively at an election at which the same number of votes were cast
and the entire number of directors authorized at the time of the director's most
recent election were then being elected. The CGCL provides that any or all of
the directors may be removed from office, without cause, if such removal is
approved by a vote of a majority of the outstanding shares entitled to vote.
 
VOTING RIGHTS
 
    UNIVERSAL.  The MBCA provides that unless otherwise provided in the articles
or in the terms of the shares, a shareholder has one vote for each share held.
The Universal Articles make no provision for the amount of votes per share, and
thus each holder of Universal Common Stock is entitled to one vote per share on
all matters to be voted upon by Universal shareholders. The Universal By-Laws
provide that the holders of shares entitled to vote for directors of Universal
may, by unanimous affirmative vote, take any action that Chapter 302A of the
MBCA requires or permits the board to take or the shareholders to take after
action or approval of the board.
 
    99CENTS ONLY STORES.  Each shareholder is entitled to one vote for each
share held of record on all matters to be voted on by the shareholders.
 
CUMULATIVE VOTING
 
    UNIVERSAL.  The Universal Articles provides that there shall be no
cumulative voting by its shareholders.
 
    99CENTS ONLY STORES.  The 99CENTS Only Stores Articles provide that
shareholders may not cumulative votes in the election of directors as long as
99CENTS Only Stores is a "listed corporation" within the meaning of Section
301.5 of the CGCL. A "listed corporation" includes a corporation, such as
99CENTS Only Stores, with outstanding shares listed on the New York Stock
Exchange. Accordingly, cumulative voting currently is not permitted in the
election of directors.
 
NOTICE OF SHAREHOLDER MEETINGS
 
    UNIVERSAL.  Pursuant to the Universal By-Laws, notice of all meetings of
shareholders shall be given to every holder of shares entitled to vote at such
meeting between 3 and 60 days before the date of the meeting. The notice shall
contain the date, time and place of the meeting, and any other information
required under the MBCA. In the case of a special meeting, the notice shall
contain a statement of the purposes of the meeting.
 
    99CENTS ONLY STORES.  The 99CENTS Only Stores By-Laws provide that written
notice of each meeting of shareholders, annual or special, shall be given to
each shareholder entitled to vote thereat, not less than 10 nor more than 60
days before the date of the meeting. The notice of each such annual or special
meeting of shareholders shall state the place, the date, and the hour of the
meeting, and (1) in the
 
                                       58

case of a special meeting, the general nature of the business to be transacted
at the meeting (and no other business may be transacted at the meeting), or (2)
in the case of the annual meeting, those matters which the Board, at the time of
the mailing of the notice, intend to present for action by the shareholders, and
any proper matter may be presented at the meeting for action, provided, however,
that the notice shall specify the general nature of a proposal, if any, to take
action with respect to approval of (i) a contract or other transaction with an
interested director pursuant to Section 310 of the CGCL, (ii) amendment of the
Articles of Incorporation pursuant to Section 902 of the CGCL , (iii) a
reorganization of the corporation pursuant to Section 1201 of the CGCL, (iv)
voluntary dissolution of the corporation pursuant to Section 1900 of the CGCL or
(v) a distribution in dissolution other than in accordance with the rights of
outstanding preferred shares, if any, pursuant to Section 2007 of the CGCL. The
notice of any meeting at which directors are to be elected shall include the
names of nominees intended at the time of the notice to be presented by
management for election.
 
SPECIAL MEETINGS OF SHAREHOLDERS
 
    UNIVERSAL.  The Universal By-Laws provide that special meetings of the
shareholders may be called for any purpose or purposes at any time by the Chief
Executive Officer, the Treasurer, or two or more directors. A special meeting of
the shareholders may also be called by the Board upon written notice of demand
given to the Chief Executive Officer or Treasurer of Universal by a shareholder
or shareholders holding ten percent or more of the voting power of all shares
entitled to vote.
 
    99CENTS ONLY STORES.  The 99CENTS Only Stores By-Laws provide that special
meetings of the shareholders for the purpose of taking any action which the
shareholders are permitted to take under the CGCL may be called at any time by
the Chairman of the Board or the President, or by the Board, or by any Vice
President, or by one or more shareholders entitled to cast not less than 10
percent of the votes of the meeting.
 
SHAREHOLDER ACTIONS BY WRITTEN CONSENT
 
    UNIVERSAL.  Section 302A.441 of the MBCA provides that an action required or
permitted to be taken at a meeting of the shareholders may be taken without a
meeting by written action signed by all of the shareholders entitled to vote on
that action. The written action is effective when it has been signed by all of
those shareholders, unless a different effective time is provided in the written
action. The Universal By-Laws provide that an action required or permitted to be
taken at a meeting of the shareholders may be taken without a meeting by written
action signed by all of the shareholders entitled to vote on that action.
 
    99CENTS ONLY STORES.  Section 603 of CGCL states that unless otherwise
provided in the articles, any action which may be taken at any annual or special
meeting of shareholders may be taken without a meeting and without prior notice,
if a consent in writing, setting forth the action so taken, shall be signed by
the holders of outstanding shares having not less than the minimum number of
votes that would be necessary to authorize or take such action at a meeting at
which all shares entitled to vote thereon were present and voted. The 99CENTS
Only Stores Articles expressly provide that the right of the shareholders to
take action by written consent is eliminated.
 
AMENDMENTS TO ARTICLES OF INCORPORATION
 
    UNIVERSAL.  Under the MBCA, all amendments to Universal's Articles, unless
otherwise specified in the Articles, must be approved by the affirmative vote of
holders of the shares of capital stock entitled to vote thereon, unless a class
vote is required. Universal's Articles do not contain any super-majority or
other restrictions on amendment of the Articles.
 
    99CENTS ONLY STORES.  Under the CGCL, unless otherwise specified in the
company's articles of incorporation, an amendment to such articles of
incorporation may be adopted if approved by the board and approved by the
affirmative vote of holders of the shares of stock entitled to vote thereon,
unless a
 
                                       59

class vote is required. The 99CENTS Only Stores Articles do not contain any
super-majority or other restrictions on amendment of the Articles.
 
AMENDMENTS TO BY-LAWS
 
    UNIVERSAL.  The Universal By-Laws provide that they may be amended or
altered by the board at any meeting. By-Laws amended or altered by the board may
be amended or repealed by the shareholders in accordance with the applicable
provisions of the MBCA. Under the MBCA, unless reserved by the articles to the
shareholders, the power to adopt, amend, or repeal the by-laws is vested in the
board. The power of the board is subject to the power of the shareholders, to
adopt, amend, or repeal by-laws adopted, amended, or repealed by the board. If a
shareholder or shareholders holding three percent or more of the voting power of
the shares entitled to vote propose a resolution for action by the shareholders
to adopt, amend, or repeal by-laws adopted, amended, or repealed by the board
and the resolution sets forth the provision or provisions proposed for adoption,
amendment, or repeal, the limitations and procedures for submitting,
considering, and adopting the resolution are the same as those for an amendment
of the articles of incorporation.
 
    99CENTS ONLY STORES.  The CGCL provides that by-laws may be adopted, amended
or repealed either by affirmative vote of the holders of capital shares entitled
to vote thereon or by approval of the board. Moreover, the articles or by-laws
may restrict or eliminate the power of the board to adopt, amend or repeal any
or all by-laws. The 99CENTS Only Stores By-Laws provide that by-laws may be
adopted, amended or repealed by the vote of holders of a majority of the
outstanding shares entitled to vote. In addition, by-laws other than a by-law or
an amendment of a by-law changing the authorized number of directors, may be
adopted, amended or repealed by the board of directors. By-Laws adopted, amended
or repealed by the board may be adopted, amended or repealed by the shareholders
in accordance with the applicable provisions of the CGCL.
 
INDEMNIFICATION OF OFFICERS AND DIRECTORS
 
    For a discussion of Indemnification of Officers and Directors for both
99CENTS Only Stores and Universal, refer to "CERTAIN DIFFERENCES BETWEEN
CALIFORNIA AND MINNESOTA CORPORATION LAW."
 
                                       60

                   CERTAIN DIFFERENCES BETWEEN CALIFORNIA AND
                           MINNESOTA CORPORATION LAW
 
    The rights of Universal shareholders who become shareholders of 99CENTS Only
Stores will be governed by the CGCL rather than the MBCA. The MBCA and the CGCL
differ in many respects and, consequently, it is not practical to summarize all
of such differences. In addition to matters discussed elsewhere in this Proxy
Statement/Prospectus, and the differences described under "COMPARISON OF RIGHTS
OF SHAREHOLDERS OF 99CENTS ONLY STORES AND UNIVERSAL," the following is a
summary of certain significant differences which may affect the rights and
interests of the shareholders of Universal.
 
VOTE REQUIRED FOR CERTAIN MERGERS
 
    Both the MBCA and CGCL require that certain mergers and exchanges be
approved by a majority of the outstanding shares entitled to vote thereon. Under
the MBCA, a vote of the shareholders of the surviving corporation is not
required where, in the case of a merger or exchange, there is no amendment of
the corporation's articles or where a change in the corporation's outstanding
stock is involved and the merger results in no more than a 20% increase in the
voting power of the outstanding common stock, or if the merger results in no
more than a 20% increase in the number of shares entitled to participate without
limitation in corporate distributions. Under the CGCL no approval of the
outstanding shares is required in the case of any corporation if such
corporation, or its shareholders immediately before the merger, shall own equity
securities, other than any warrant or right to subscribe to or purchase such
equity securities, of the surviving or acquiring corporation possessing more
than five-sixths of the voting power of the surviving or acquiring corporation.
 
LOANS TO DIRECTORS
 
    The MBCA permits loans to be made to a director of the corporation if the
Board of Directors finds that the loan may benefit the corporation. The CGCL
permits loans to be made to directors (i) as an advance for anticipated
reasonable expenses to be incurred in the performance or his or her duties, (ii)
with approval of a majority of the shareholders, or (iii) by the board alone if
certain corporate procedures are followed.
 
PREEMPTIVE RIGHTS
 
    Under the MBCA, unless denied or limited in the articles of incorporation,
shareholders have preemptive rights to acquire a certain fraction proportionate
to the shares held when the corporation proposes to issue new or additional
shares or rights to purchase shares of the same series or class held by the
shareholder unless the shares are issued (i) for consideration other than money,
(ii) pursuant to a plan of merger, (iii) pursuant to an employee incentive plan,
(iv) pursuant to a reorganization, or (v) as part of a public offering. The CGCL
provides that unless the articles provide otherwise, the board may issue shares,
options or securities having conversion or option rights without first offering
them to shareholders of any class.
 
    The Universal Articles provide that the shareholders of the company shall
not have preemptive rights to subscribe for or acquire shares of any class or
series of the company.
 
    The 99CENTS Only Stores Articles make no provision for shareholder rights of
preemption.
 
DIVIDENDS
 
    Under California law, a corporation may not make any distribution (including
dividends, whether in cash or other property, and repurchase of its shares)
unless either the corporation's retained earnings immediately prior to the
proposed distribution equal or exceed the amount of the proposed distribution
or,
 
                                       61

immediately after giving effect to such distribution, the corporation's assets
(exclusive of goodwill, capitalized research and development expenses and
deferred charges) would be at least equal to 1 1/4 times its liabilities (not
including deferred taxes, deferred income and other deferred credits), and the
corporation's current assets would be at least equal to its current liabilities
or, if the average earnings of the corporation before taxes on income and
interest expense for the two preceding fiscal years was less than the average of
the interest expense of the corporation for those fiscal years, at least equal
to 1 1/4 times its current liabilities; provided, however, that in determining
the amount of the assets of the corporation profits derived from an exchange of
assets shall not be included unless the assets received are currently realizable
in cash; and provided, further, that for the purpose of this rule "current
assets" may include net amounts which the board has determined in good faith may
reasonably be expected to be received from customers during the 12-month period
used in calculating current liabilities pursuant to existing contractual
relationships obligating those customers to make fixed or periodic payments
during the term of the contract. Under California law, there are certain
additional regulations to the foregoing rules for repurchases of shares.
 
    Under Minnesota law, the board may authorize and cause the corporation to
make a distribution only if the board determines that the corporation will be
able to pay its debts in the ordinary course of business after making the
distribution and the board does not know before the distribution is made that
the determination was or has become erroneous. The right of the board to
authorize, and the corporation to make, distributions may be prohibited,
limited, or restricted by, or the rights and priorities of persons to receive
distributions may be established by, the articles or by-laws or an agreement.
The MBCA is therefore somewhat more flexible with respect to the payment of
dividends than the CGCL.
 
    Universal has not paid any cash dividends on the Universal Common Stock
within the past 10 years. According to Universal's Annual Report on Form 10-K
for the year ended December 31, 1997, Universal presently intends to continue to
retain any earnings in connection with its business. In addition, dividends
currently are prohibited by the terms of Universal's revolving credit agreement.
Universal, therefore, does not anticipate paying dividends on the Universal
Common Stock in the foreseeable future.
 
    99CENTS Only Stores has not paid any cash dividends on the 99CENTS Only
Stores Common Stock since its initial public offering in May 1996. 99CENTS Only
Stores anticipates that all of its income in the foreseeable future will be
retained for the development and expansion of its business and therefore does
not anticipate paying dividends on the 99CENTS Only Stores Common Stock in the
foreseeable future.
 
RIGHTS OF DISSENTING SHAREHOLDERS
 
    Under both the CGCL and the MBCA, a dissenting shareholder of a corporation
participating in certain transactions may, in certain circumstances, receive
cash in the amount of the fair value of his or her shares in lieu of the
consideration otherwise receivable in the transaction.
 
    The CGCL does, in general, afford dissenters' rights in a share for share
exchange, a sale of assets, reorganization or a merger. In the case of a
corporation whose shares are listed on a national securities exchange,
dissenters' rights would nevertheless be available in certain transactions for
any shares with respect to which there are certain restrictions on transfer and
for any class with respect to which the holders of five percent or more of the
class claim dissenters' rights. Also, under the CGCL shareholders of a
corporation involved in a reorganization are not entitled to dissenters' rights
if the corporation, or its shareholders immediately before the reorganization,
or both, will own immediately after the reorganization more than five-sixths of
the voting power of the surviving or acquiring corporation or its parent entity.
 
    Under the MBCA, a shareholder of a corporation may dissent from, and obtain
payment for the fair value of the shareholder's shares in the event of, certain
transactions. Unless the corporation's articles or bylaws, or a resolution
approved by the corporation's board otherwise provide, the right to obtain
payment upon dissent does not apply to a shareholder of the surviving
corporation in a merger if the shares of the shareholder are not entitled to be
voted on the merger.
 
                                       62

INSPECTION OF LIST OF SHAREHOLDERS
 
    Both the CGCL and the MBCA allow a corporation's shareholders to inspect a
list of shareholders for a purpose reasonably related to a person's interest as
a shareholder.
 
    Under the CGCL, a shareholder or shareholders holding at least five percent
in the aggregate of the outstanding voting shares of a corporation or who hold
at least one percent of those voting shares and have filed a Schedule 14A with
the Securities and Exchange Commission shall have an absolute right to (1)
inspect and copy the record of shareholders' names and addresses and share
holdings during usual business hours upon five business days' prior written
demand upon the corporation, or (2) obtain from the transfer agent for the
corporation, upon written demand and upon the tender of usual charges for such a
list, a list of the shareholders' names and addresses who are entitled to vote
for the election of directors, and their share holdings, as of the most recent
record date for which it has been compiled or as of a date specified by the
shareholder subsequent to the date of demand.
 
    The MBCA provides that a shareholder, beneficial owner, or a holder of a
voting trust certificate of a publicly held corporation has, upon written demand
a right at any reasonable time to examine and copy the corporation's share
register and other corporate records reasonably related to the stated purpose
and described with reasonable particularity in the written demand upon
demonstrating the stated purpose is a proper purpose.
 
BUSINESS COMBINATIONS/ANTI-TAKEOVER LAWS
 
    Section 302A.673 of the MBCA provides that an "issuing public corporation"
(one which is incorporated under or governed by the MBCA and has at least fifty
stockholders) may not engage in any of a broad range of business combinations,
including a merger, with a person, or affiliate or associate of a person, that
acquires beneficial ownership of 10 percent or more of the voting stock of that
corporation (i.e., an interested shareholder) for a period of four years
following the date that the person became a 10 percent shareholder (the share
acquisition date) unless, prior to the share acquisition date, a special
committee of the board of directors of the corporation consisting solely of
disinterested directors approves either the business combination or the
acquisition of shares. The MBCA permits a corporation to "opt out" of the
business combination statute by electing to do so in its articles or by-laws.
Neither the Universal Articles nor the Universal By-Laws contain such an "opt
out" provision.
 
    The CGCL does not contain a similar provision.
 
    Immediately after the Effective Date, Universal shareholders will become
99CENTS Only Stores shareholders and therefore will no longer benefit from the
protections of Section 302A.673 of the MBCA. This law was designed to make more
difficult certain kinds of "unfriendly" corporate takeovers or other
transactions involving a corporation and one or more of its significant
shareholders. Section 302A.673 regulates large accumulations of shares,
including those made by tender offers and it has the effect of significantly
delaying a purchaser's ability to acquire the entire interest in Universal if
such acquisition is not approved by the Board of Directors of Universal.
 
    The MBCA includes three other provisions relating to takeovers. First, the
MBCA contains a provision which prohibits a publicly-held corporation from
entering into or amending agreements (commonly referred to as golden parachutes)
that increase current or future compensation of any officer or director during
any tender offer or request or invitation for tenders. Second, the MBCA contains
a provision which limits the ability of a corporation to pay greenmail. The
statute provides that a publicly held corporation is prohibited from purchasing
or agreeing to purchase any shares from a person who beneficially owns more than
five percent of the voting power of the corporation if the shares had been
beneficially owned by that person for less than two years, and if the purchase
price would exceed the market value of those shares. However, such a purchase
will not violate the statute if the purchase is approved at a meeting of the
stockholders by a majority of the voting power of all shares entitled to vote or
 
                                       63

if the corporation's offer is of at least equal value per share and to all
holders of shares of the class or series and to all holders of any class or
series into which the securities may be converted. Third, the MBCA also
authorizes the board of directors, in considering the best interests of the
corporation with respect to a proposed acquisition of an interest in the
corporation, to consider the interest of the corporation's employees, customers,
suppliers and creditors, the economy of the state and nation, community and
social considerations and the long-term as well as short term interests of the
corporation and its stockholders, including the possibility that these interests
may best be served by the continued independence of the corporation.
 
    The CGCL does not contain a similar provision.
 
    Section 302A.671 of the MBCA contains provisions which, among other things,
provide that a person who acquires stock in excess of certain thresholds
beginning with 20% of the outstanding stock, may not vote shares which exceed
the thresholds, unless the affirmative vote of a majority of the voting power of
the corporation entitled to vote (excluding all shares held by the acquiring
person, any officer of the corporation and any employee director of the
corporation), permits such shares to have full voting rights. The effect of this
provision may be to give the board more bargaining power in the event of an
unsolicited tender offer. See "THE UNIVERSAL SPECIAL MEETING."
 
    The CGCL does not contain a similar provision.
 
INDEMNIFICATION AND LIMITATION OF LIABILITY
 
    California and Minnesota have similar laws respecting indemnification by a
corporation of its officers, directors, employees and other agents. The laws of
both states permit, with certain exceptions, a corporation to adopt a provision
in its articles of incorporation eliminating the liability of a director of the
corporation for monetary damages for breach of the director's fiduciary duty of
care. Indeed, the 99CENTS Only Stores Articles and the Universal Articles
include such a provision.
 
    The CGCL authorizes a corporation to indemnify any person who was or is a
party or is threatened to be made a party to any proceeding (other than an
action by or in the right of the corporation to procure a judgment in its favor)
by reason of the fact that the person is or was an agent (including any person
who is or was a director, officer, employee or other agent of the corporation)
of the corporation, against expenses, judgments, fines, settlements, and other
amounts actually and reasonably incurred in connection with the proceeding if
that person acted in good faith and in a manner the person reasonably believed
to be in the best interests of the corporation and, in the case of a criminal
proceeding, had no reasonable cause to believe the conduct of the person was
unlawful. The termination of any proceeding by judgment, order, settlement,
conviction, or upon a plea of nolo contendere or its equivalent shall not, of
itself, create a presumption that the person did not act in good faith and in a
manner which the person reasonably believed to be in the best interests of the
corporation or that the person had reasonable cause to believe that the person's
conduct was unlawful. Moreover a corporation shall have power to indemnify any
person who was or is a party or is threatened to be made a party to any
threatened, pending, or completed action by or in the right of the corporation
to procure a judgment in its favor by reason of the fact that the person is or
was an agent of the corporation, against expenses actually and reasonably
incurred by that person in connection with the defense or settlement of the
action if the person acted in good faith, in a manner the person believed to be
in the best interests of the corporation and its shareholders.
 
    The CGCL also provides that the articles of a company may set forth a
provision, eliminating or limiting the personal liability of a director for
monetary damages in an action brought by or in the right of the corporation for
breach of a director's duties to the corporation and its shareholders, as set
forth in Section 309 of the CGCL, provided, however, that (A) such a provision
may not eliminate or limit the liability of directors (i) for acts or omissions
that involve intentional misconduct or a knowing and culpable violation of law,
(ii) for acts or omissions that a director believes to be contrary to the best
interests of the corporation or its shareholders or that involve the absence of
good faith on the part of the director, (iii) for
 
                                       64

any transaction from which a director derived an improper personal benefit, (iv)
for acts or omissions that show a reckless disregard for the director's duty to
the corporation or its shareholders in circumstances in which the director was
aware, or should have been aware, in the ordinary course of performing a
director's duties, of a risk of serious injury to the corporation or its
shareholders, (v) for acts or omissions that constitute an unexcused pattern of
inattention that amounts to an abdication of the director's duty to the
corporation or its shareholders, (vi) under Section 310, or (vii) under Section
316, (b) no such provision shall eliminate or limit the liability of an officer
for any act or omission as an officer, notwithstanding that the officer is also
a director or that his or her actions, if negligent or improper, have been
ratified by the directors. The 99CENTS Only Stores Articles provide for such a
provision which states that the liability of the directors of the corporation
for monetary damages shall be eliminated to the fullest extent permissible under
California law.
 
    The CGCL also provides that the articles of a company may also set forth a
provision authorizing, the indemnification of agents (as defined in Section 317)
in excess of that expressly permitted under California law for those agents of
the corporation for breach of duty to the corporation and its stockholders,
provided, however, that the provision may not provide for indemnification of any
agent for any acts or omissions or transactions from which a director may not be
relieved of liability. The 99CENTS Only Stores Articles provide that (i) the
corporation may purchase and maintain insurance on behalf of any person who is
or was a director, officer, employee or agent of the corporation or is serving
at the request of this Corporation as a director, officer, employee or agent of
another corporation, partnership, joint venture, trust, employee benefit plan or
other enterprise, against any liability asserted against him or her and incurred
by him or her in any such capacity, or arising out of his or her status as such,
whether or not the corporation would have the power to indemnify against such
liability under the provisions of law; and (ii) the corporation may create a
trust fund, grant a security interest and/or use other means (including, without
limitation, letters of credit, surety bonds and/or other similar arrangements,
as well as enter into contracts providing indemnification, to the fullest extent
authorized or permitted by law and including as part thereof provisions with
respect to any or all of the foregoing to ensure the payment of such amounts as
may become necessary to effect the indemnification as provided therein, or
elsewhere.
 
    Unless limited by the articles of incorporation or by-laws of a corporation,
the MBCA provides for mandatory indemnification of a director, officer, employee
or committee member against certain liabilities and expenses if such person (i)
acted in good faith; (ii) received no improper personal benefit; (iii) in the
case of a criminal proceeding, had no reasonable cause to believe the conduct
was unlawful; and (iv) depending upon the capacity in which such person was
serving, either believed the conduct was not opposed to the best interests of
the corporation.
 
    The Universal Articles provide that a director of the corporation shall not
be personally liable to the corporation or its shareholders for monetary damages
for breach of fiduciary duty as a director, except for (i) liability based on a
breach of the duty of loyalty to the corporation or the shareholders; (ii)
liability for acts or omissions not in good faith or that involve intentional
misconduct or a knowing violation of law; (iii) liability based on the payment
of an improper dividend or an improper repurchase of the corporation's stock
under Section 559 of the MBCA or on violations of federal or state securities
laws; (iv) liability for any transaction from which the director derived an
improper personal benefit; or (v) liability for any act or omission occurring
prior to the date of such Article. If the MBCA thereafter is amended to
authorize the further elimination or limitation of the liability of directors,
than the liability of a director of the corporation in addition to the
limitation on personal liability provided in the Article, shall be limited to
the fullest extent permitted under the amended MBCA.
 
DISSOLUTION
 
    Under the CGCL, shareholders holding fifty percent or more of the total
voting power may authorize a corporation's dissolution, with or without the
approval of the corporation's Board of Directors, and this right may not be
modified by the corporation's articles of incorporation.
 
                                       65

    The MBCA provides that a corporation may be dissolved by the voluntary
action of holders of a majority of a corporation's shares entitled to vote at a
meeting called for the purpose of considering such dissolution. The MBCA also
provides that a court may dissolve a corporation in an action by a stockholder
where: (a) the situation involves a deadlock in the management of corporate
affairs and the stockholders cannot break the deadlock in the management of
corporate affairs and the stockholders cannot break the deadlock; (b) the
directors have acted fraudulently, illegally, or in a manner unfairly
prejudicial to the corporation; (c) the stockholders are divided in voting power
for two consecutive regular meetings to the point where a successor directors
are not elected; (d) there is a case of misapplication or waste of corporate
assets; or (e) the duration of the corporation has expired.
 
                                 LEGAL OPINIONS
 
    The legality of the 99CENTS Only Stores Common Stock to be issued in
connection with the Exchange Offer is being passed on by the law firm of Troop
Meisinger Steuber & Pasich, LLP, Los Angeles, California.
 
                                    EXPERTS
 
    The audited financial statements of 99CENTS Only Stores as of December 31,
1996 and 1997, and for each of the three years in the period ended December 31,
1997 incorporated by reference in this Registration Statement, have been audited
by Arthur Andersen LLP, independent public accountants, as indicated in their
reports with respect thereto, and are incorporated by reference herein in
reliance upon the authority of such firm as experts in giving said reports.
 
    The audited consolidated financial statements of Universal as of December
31, 1997, and for the year ended December 31, 1997, incorporated by reference in
this Registration Statement, have been audited by Arthur Andersen LLP,
independent public accountants, as indicated in their reports with respect
thereto, and are incorporated by reference herein in reliance upon the authority
of such firm as experts in giving said reports. Reference is made to said report
which includes an explanatory paragraph that describes Universal's ability to
continue as a going concern.
 
    The consolidated balance sheet of Universal International, Inc. as of
December 31, 1996, and the consolidated statements of operations, stockholders'
equity and cash flows and the financial statement schedule for each of the two
years in the period ended December 31, 1996, incorporated by reference in this
Registration Statement, have been incorporated by reference herein in reliance
on the reports, which include an explanatory paragraph related to going concern
considerations, of Coopers & Lybrand L.L.P., independent accountants, given on
the authority of that firm as experts in accounting and auditing.
 
                                       66

                                    ANNEX A
 
                             COOPERATION AGREEMENT
 
    This Agreement is made and entered into as of March 4, 1998, by and between
Universal International, Inc., a Minnesota corporation ("UNIVERSAL") and 99CENTS
Only Stores, a California corporation ("99CENTS ONLY") with respect to the
following:
 
                                R E C I T A L S
 
    WHEREAS, on November 17, 1997, 99CENTS Only acquired 4,500,000 shares of the
common stock, $0.001 par value per share (the "Common Stock"), of Universal,
representing approximately 48% of the outstanding Common Stock;
 
    WHEREAS, on February 17, 1998, 99CENTS Only publicly announced that it had
made a proposal to the Board of Directors of Universal to acquire 100% of the
outstanding Common Stock of Universal for an exchange ratio of one share of
99CENTS Only for each 16 shares of Universal Common Stock;
 
    WHEREAS, 99CENTS Only has determined to effect the acquisition by an
exchange offer (the "Offer") to all of the Universal stockholders;
 
                               A G R E E M E N T
 
    NOW, THEREFORE, in consideration of the foregoing and of the
representations, warranties, covenants and agreements contained herein, the
parties to this Agreement hereby agree as follows:
 
    1.  AGREEMENT TO SUPPORT TENDER OFFER GENERALLY.  Universal agrees to
support the Offer by 99CENTS Only and not to make any statement privately or
publicly opposing the Offer. Universal hereby agrees to cooperate generally with
99CENTS Only in the Offer by providing access during normal business hours to
the books and records of Universal, as well as to Universal's officers and
directors for purposes of providing information to make all appropriate filings
under the applicable federal and state laws. Furthermore, Universal agrees to
assist 99CENTS Only in soliciting proxies in favor of affording voting rights to
the shares of Universal acquired by 99CENTS Only in the Offer.
 
    2.  SCHEDULE 14D-9.  Universal hereby agrees to file with the Securities and
Exchange Commission ("SEC") in accordance with the provisions of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), its Solicitation
Recommendation Statement on Schedule 14D-9 pertaining to the Offer (together
with any amendments or supplements thereto, the "Schedule 14D-9") and to mail
promptly (but in no event later than as is required by applicable law) the
Schedule 14D-9 to the stockholders of Universal. Universal agrees that in the
Schedule 14D-9 it will not oppose the Offer and will either support the Offer or
take a position neutral to the position of 99CENTS Only. Universal shall provide
to 99CENTS Only and its counsel draft copies of the Schedule 14D-9 as soon as
practicable prior to its filing with the SEC such that 99CENTS Only and its
legal counsel shall have a reasonable opportunity to review and comment on the
Schedule 14D-9. Universal shall provide to 99CENTS Only and its counsel in
writing any comments Universal or its counsel may receive from the SEC or its
staff with respect to the Schedule 14D-9 as soon as practicable after the
receipt thereof. Universal represents and warrants to 99CENTS Only that the
Schedule 14D-9 will comply in all material respects with the provisions of
applicable federal securities laws and the securities laws of the State of
Minnesota. Each of 99CENTS Only and Universal represents and warrants to the
other that the information provided and to be provided by 99CENTS Only and
Universal, as the case may be, by or through their respective representatives
for use in the Schedule 14D-9 shall not, on the date filed with the SEC, on the
dates first published or sent or given to the stockholders of Universal and on
the expiration date of the Offer, contain any untrue statement of a material
fact with respect to such party or omit to state any material fact with respect
to such party required to be stated therein or necessary in order to make the
statements therein, in light of the
 
                                      A-1

circumstances under which they were made, not misleading. Universal and 99CENTS
Only each agrees to correct promptly any information provided by it for use in
the Schedule 14D-9 if and to the extent that it shall have become false or
misleading in any material respect, and Universal further agrees to take all
steps necessary to cause the Schedule 14D-9 as so corrected to be filed with the
SEC and to be disseminated to stockholders of Universal to the extent required
by applicable federal securities laws and the Minnesota Business Corporation Act
("Minnesota Laws").
 
    3.  STOCKHOLDER LISTS.  In connection with the Offer, Universal will
promptly furnish 99CENTS Only with mailing labels, security position listings
and any available listing or computer file containing the names and addresses of
the record holders of Universal Common Stock as of a recent date and shall
furnish 99CENTS Only with such additional information and assistance as 99CENTS
Only or its agents may reasonably request in communicating the Offer to the
record and beneficial holders of Universal Common Stock. Subject to the
requirements of applicable law, and except for such steps as are necessary to
disseminate the Offer documents, 99CENTS Only and their affiliates, associates,
agents and advisors shall use the information contained in any such labels,
listing and files only in connection with the Offer and, if this Agreement shall
be terminated, will deliver to Universal all copies of such information then in
their possession.
 
    4.  COMPOSITION OF THE BOARD OF DIRECTORS; SECTION 14(f).  (a) In the event
that immediately following the Offer, 99CENTS Only owns at least a majority of
the Universal Common Stock outstanding, 99CENTS Only shall be entitled to
designate for appointment or election to Universal's Board of Directors and any
committee thereof, upon written notice to Universal, that number of directors
equal to the product of (i) the number of directors on the Universal Board of
Directors or the applicable committee and (ii) the percentage which the number
of shares of Universal Common Stock held by 99CENTS Only after the Offer bears
to the total number of shares of Universal Common Stock outstanding, rounded up
to the next whole number. Prior to consummation of the Offer, the Board of
Directors of Universal will use its best efforts to either adopt an amendment to
Universal's By-Laws to provide in effect that upon the request of 99CENTS Only
following the acquisition by 99CENTS Only of a majority of the shares of
Universal Common Stock outstanding pursuant to the Offer, the number of members
of Universal's Board of Directors and any committee thereof shall be increased
to the extent necessary to provide the persons designated by 99CENTS Only
pursuant to this Section with representation on the Board of Directors and its
committees, or will obtain the resignation of such number of directors as is
necessary to enable such number of 99CENTS Only designees to be so elected.
 
    (b) Universal's obligations to cause designees of 99CENTS Only to be elected
or appointed to the Board of Directors of Universal and any committee thereof
shall be subject to Section 14(f) of the Exchange Act and Rule 14f-1 promulgated
thereunder. Universal shall promptly take all actions required pursuant to such
Section and Rule in order to fulfill its obligations under this Section and
shall include in the Schedule 14D-9 such information with respect to 99CENTS
Only and its officers and directors as is required under such Section and Rule
in order to fulfill its obligations under this Section. 99CENTS Only will supply
to Universal in writing any information with respect to it and its nominees,
officers, directors and affiliates required by such Section and Rule.
 
    5.  APPROVAL OF THE STOCKHOLDERS.  Pursuant to the requirements of Section
302A.671 of the Minnesota Laws, the Offer requires (i) the affirmative vote of
the holders of a majority of the voting power of all shares of Common Stock of
Universal entitled to vote, including all shares held by 99CENTS Only, and (ii)
the affirmative vote of the holders of a majority of the voting power of all
shares of Common Stock of Universal entitled to vote, excluding the shares held
by 99CENTS Only, and shares held by officers and employee directors of
Universal. Without the affirmative vote of the stockholders of Universal, the
shares of Universal Common Stock acquired by 99CENTS Only representing over 50%
of the outstanding Common Stock of Universal would be denied voting rights. In
accordance with Section 302A.671, 99CENTS Only and Universal shall cooperate to
prepare and file with the SEC a registration statement on Form S-4 (the
"Registration Statement"), a portion of which shall include a proxy statement
(the "Offer
 
                                      A-2

Proxy Statement/Prospectus") with respect to a meeting of stockholders of
Universal to vote on the Offer for purposes of Section 302A.671 of the Minnesota
Laws. Each of 99CENTS Only and Universal represents and warrants to the other
that the information provided and to be provided by 99CENTS Only and Universal,
as the case may be, by or through their respective representatives for use in
the Registration Statement shall not, and on the date filed with the SEC, and
with respect to the Offer Proxy Statement/ Prospectus, on the dates first
published or sent or given to the holders of Universal Common Stock, contain any
untrue statement of a material fact with respect to such party or omit to state
any material fact with respect to such party required to be stated therein or
necessary in order to make the statements therein, in light of the circumstances
under which they were made, not misleading. Universal and 99CENTS Only each
agrees to correct promptly any information provided by it for use in the Offer
Proxy Statement/Prospectus if and to the extent that it shall have become false
or misleading in any material respect, and 99CENTS Only further agrees to take
all steps necessary to cause the Registration Statement as so corrected to be
filed with the SEC and for the Offer Proxy Statement/Prospectus to be
disseminated to the holders of shares of Universal Common Stock, in each case as
and to the extent required by applicable federal securities laws and the
Minnesota Laws. Universal agrees to use its best efforts to obtain the approval
of its stockholders pursuant to Section 302A.671 of the Minnesota Laws.
 
    6.  TAKEOVER PROVISIONS INAPPLICABLE; AMENDMENT TO RIGHTS
AGREEMENT.  Universal agrees to take all necessary action to approve an
amendment of the Rights Agreement, dated as of April 19, 1996 (the "Rights
Agreement"), between Universal and Norwest Bank Minnesota, N.A., as rights agent
Rights Agreement so that (a) none of the execution or delivery of this
Agreement, the making of the Offer, the acceptance for payment or payment for
shares of Universal Common Stock by 99CENTS Only pursuant to the Offer or the
consummation of any other transaction with 99CENTS Only will result in (i) the
occurrence of the "Distribution Date" described under Section 3 of the Rights
Agreement, or (ii) the common stock purchase rights (the "Company Rights")
issued pursuant to the Rights Agreement becoming evidenced by, and transferable
pursuant to, certificates separate from the certificates representing Universal
Common Stock, or (b) the Company Rights will be redeemed prior to 99CENTS Only
becoming an "Acquiring Person" pursuant to the terms of the Rights Agreement.
 
    7.  FILINGS.  99CENTS Only and Universal agree to (a) use all reasonable
efforts to cooperate with one another in (i) determining which filings are
required to be made prior to consummation of the Offer, and which consents,
approvals, permits or authorizations are required to be obtained from states and
foreign jurisdictions in connection with the consummation of the Offer and (ii)
timely making such filings and timely seeking all such consents, approvals,
permits or authorizations; and (b) use all reasonable efforts to take, or cause
to be taken, all other action and do, or cause to be done, all other things
necessary, proper or appropriate to consummate and make effective the Offer.
 
    8.  TERMINATION.  This Agreement may be terminated (i) by either 99CENTS
Only or Universal if the Offer shall not have been consummated on or before
September 30, 1998 or (ii) by the mutual written consent of Universal and
99CENTS Only authorized by their respective Boards of Directors. If this
Agreement is terminated pursuant to this Section, this Agreement shall become
void and of no effect with no liability on the part of any party hereto.
 
    9.  MISCELLANEOUS.
 
        (a)  SEVERABILITY.  Should any Section or any part of a Section within
    this Agreement be rendered void, invalid or unenforceable by any court of
    law for any reason, such invalidity or unenforceability shall not void or
    render invalid or unenforceable any other Section or part of a Section in
    this Agreement.
 
        (b)  GOVERNING LAW.  Except to the extent that the laws of Minnesota are
    mandatorily applicable to the Offer, this Agreement shall be governed by,
    and construed in accordance with, the laws of the State of California
    applicable to contracts executed in and to be performed in that State. All
    actions and proceedings arising out of or relating to this Agreement shall
    be heard and determined in
 
                                      A-3

    any U.S. federal court located in the City of Los Angeles. The parties
    hereto hereby (i) submit to the exclusive jurisdiction of any U.S. federal
    court located in the City of Los Angeles for the purpose of any action
    arising out of or based upon this Agreement or the Offer brought by any
    party hereto, and (ii) waive, and agree not to assert by way of motion, as a
    defense, or otherwise, in any such action, any claim that it is not subject
    personally to the jurisdiction of the above-named courts, that its property
    is exempt or immune from attachment or execution, that the action is brought
    in an inconvenient forum, that the venue of the action is improper, or that
    this Agreement or the Offer may not be enforced in any or by any of the
    above-named courts.
 
        (c)  NO ADVERSE CONSTRUCTION.  The rule that a contract is to be
    construed against the party drafting the contract is hereby waived, and
    shall have no applicability in construing this Agreement or any provisions
    hereof.
 
        (d)  COUNTERPARTS.  This Agreement may be executed in one or more
    counterparts, each of which shall be deemed an original but all of which
    together shall constitute one and the same instrument.
 
        (e)  COSTS AND ATTORNEYS' FEES.  In the event that any action, suit, or
    other proceeding is instituted concerning or arising out of this Agreement,
    the prevailing party shall recover all of such party's costs, and reasonable
    attorneys' fees incurred in each and every such action, suit, or other
    proceeding, including any and all appeals or petitions therefrom.
 
        (f)  SUCCESSORS AND ASSIGNS.  All rights, covenants and agreements of
    the parties contained in this Agreement shall, except as otherwise provided
    herein, be binding upon and inure to the benefit of their respective
    successors and assigns.
 
        (g)  AMENDMENT.  This Agreement may be amended by the parties hereto, by
    action taken by their respective Boards of Directors at any time before or
    after approval hereof by the stockholders, but after any such approval, no
    amendment shall be made which changes the consideration to be paid to the
    stockholders pursuant to the Offer, or which is otherwise not permitted by
    the California or Minnesota Laws, without the further approval of the
    stockholders. This Agreement may not be amended except by an instrument in
    writing signed on behalf of each of the parties hereto.
 
        (h)  BEST EFFORTS.  Subject to the terms and conditions of this
    Agreement, each party will use its best efforts to take, or cause to be
    taken, all actions and do, or cause to be done, all things necessary, proper
    or advisable under applicable laws and regulations to consummate the
    transactions contemplated by this Agreement.
 
                                      A-4

    IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Agreement as of the date first above written.
 

                               
                                99CENTS ONLY STORES
                                A CALIFORNIA CORPORATION
 
                                By:  /s/ DAVID GOLD
                                     -----------------------------------------
                                     Name: David Gold
                                     Title: President and Chief Executive
                                     Officer
 
                                UNIVERSAL INTERNATIONAL, INC.
                                A MINNESOTA CORPORATION
 
                                By:  /s/ RICHARD ENNEN
                                     -----------------------------------------
                                     Name: Richard Ennen
                                     Title: President and Chief Executive
                                     Officer

 
                                      A-5

                                    ANNEX B
 
April 20, 1998
 
To the Board of Directors of
99CENTS Only Stores
 
Gentlemen:
 
We understand that 99CENTS Only Stores ("99") owns approximately 48 percent of
the outstanding stock of Universal International, Inc. ("Universal" or the
"Company"). Universal has received an offer from 99 to acquire the publicly
traded securities of Universal not owned by 99, in exchange for shares of common
stock of 99. 99 proposes to issue to the public stockholders of Universal one
share of common stock of 99 for each 16 shares of common stock held by the
public stockholders of Universal. Such transaction and all related transactions
are referred to collectively herein as the "Transaction."
 
The Board of Directors of 99 has requested our opinion (the "Opinion") as to the
matters set forth below. The Opinion does not address 99 or the Company's
underlying business decision to effect the Transaction. We have not been
requested to, and did not, solicit third party indications of interest in
acquiring all or any part of the Company. Furthermore, at the request of the
Board of Directors of 99, we have not negotiated the Transaction or advised the
participating parties with respect to alternatives to it.
 
In connection with this Opinion, we have made such reviews, analyses and
inquiries as we have deemed necessary and appropriate under the circumstances.
Among other things, we have:
 
      1. reviewed the Company's annual reports to shareholders and on Form 10-K
         for the three fiscal years ended 1997 and quarterly reports on Form
         10-Q for the period ended September 30, 1997, and Company-prepared
         interim financial statements for the period ended November 30, 1997,
         which certain members of the Company's Board of Directors has
         identified as being the most current financial statements available;
 
      2. reviewed 99's annual reports to shareholders on Form 10-K for the five
         fiscal years ended 1997 and quarterly reports on Form 10-Q for the
         period ended September 30, 1997;
 
      3. reviewed copies of the following: (i) Cooperation Agreement; (ii)
         Irrevocable Proxy; (iii) Option and Consulting Agreements; and (iv)
         Stockholder Support Agreements;
 
      4. reviewed a final draft of the Form S-4 with respect to the Transaction,
         dated April 16, 1998;
 
      5. met with certain members of the senior management of 99 to discuss the
         operations, financial condition, future prospects and projected
         operations and performance of 99; and met with certain members of the
         Board of Directors of the Company to discuss the operations, financial
         condition, future prospects and projected operations and performance of
         the Company;
 
      6. visited certain facilities and business offices of 99;
 
      7. reviewed forecasts and projections prepared by certain members of the
         Board of Directors of the Company with respect to the Company for the
         years ended December 31, 1998 and 1999;
 
      8. reviewed forecasts and projections prepared by 99's management with
         respect to 99 for the year ended December 31, 1998;
 
                                      B-1

To The Board of Directors of
99CENTS Only Stores
April 20, 1998
 
      9. reviewed the historical market prices and trading volume for the
         Company's and 99's publicly traded securities;
 
     10. reviewed certain other publicly available financial data for certain
         companies that we deem comparable to the Company and 99, and publicly
         available prices and premiums paid in other transactions that we
         considered similar to the Transaction;
 
     11. reviewed drafts of certain documents to be delivered at the closing of
         the Transaction; and
 
     12. conducted such other studies, analyses and inquiries as we have deemed
         appropriate.
 
We have relied upon and assumed, without independent verification, that the
financial forecasts and projections provided to us have been reasonably prepared
and reflect the best currently available estimates of the future financial
results and condition of the Company and 99, and that there has been no material
change in the assets, financial condition, business or prospects of the Company
and 99 since the date of the most recent financial statements made available to
us.
 
We have not independently verified the accuracy and completeness of the
information supplied to us with respect to the Company or 99 and do not assume
any responsibility with respect to it. We have not made any physical inspection
or independent appraisal of any of the properties or assets of the Company or
99. Our Opinion is necessarily based on business, economic, market and other
conditions as they exist and can be evaluated by us at the date of this letter.
 
Based upon the foregoing and in reliance thereon, it is our opinion that the
consideration to be received by the Public Stockholders of Universal
International, Inc. in connection with the Transaction is fair to them from a
financial point of view.
 
This Opinion is furnished solely for your benefit and may not be relied upon by
any other person without our express, prior written consent. This Opinion is
delivered to each recipient subject to the conditions, scope of engagement,
limitations and understandings set forth in this Opinion and our engagement
letter, and subject to the understanding that the obligations of Houlihan Lokey
in the Transaction are solely corporate obligations, and no officer, director,
employee, agent, shareholder or controlling person of Houlihan Lokey shall be
subjected to any personal liability whatsoever to any person, nor will any such
claim be asserted by or on behalf of you or your affiliates.
 
HOULIHAN LOKEY HOWARD & ZUKIN FINANCIAL ADVISORS, INC.
 
                                      B-2

    Facsimile copies of the Letter of Transmittal will be accepted. The Letter
of Transmittal, certificates for Universal Common Stock and any other required
documents should be sent by each holder of Universal Common Stock or his
broker-dealer, commercial bank, trust company or other nominee to the Exchange
Agent as follows:
 
                      THE EXCHANGE AGENT FOR THE OFFER IS:
 
                                       X
 
           BY MAIL:           BY OVERNIGHT COURIER           BY HAND:
                                   DELIVERY:
 
               X                            X                           X
 
FACSIMILE FOR ELIGIBLE INSTITUTIONS:   X
 
FACSIMILE CONFIRMATION ONLY:      X
 
    Questions or requests for assistance may be directed to the Dealer Manager
at its address and telephone number listed below. Additional copies of this
Proxy Statement/Prospectus, the Letter of Transmittal and other tender offer
materials may also be obtained from the Exchange Agent or the Dealer Manager.
You may also contact your broker-dealer, commercial bank or trust company or
other nominee for assistance concerning the Exchange Offer.
 
                      THE DEALER MANAGER FOR THE OFFER IS:

                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 20.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
    The Registrant's Articles of Incorporation include a provision that
eliminates the personal liability of its directors to the Registrant and its
shareholders for monetary damages for breach of the directors' fiduciary duties
in certain circumstances. This limitation has no effect on a director's
liability (i) for acts or omissions that involve intentional misconduct or a
knowing and culpable violation of law, (ii) for acts or omissions that a
director believes to be contrary to the best interests of the Registrant or its
shareholders or that involve the absence of good faith on the part of the
director, (iii) for any transaction from which a director derived an improper
personal benefit, (iv) for acts or omissions that show a reckless disregard for
the director's duty to the Registrant or its shareholders in circumstances in
which the director was aware, or should have been aware, in the ordinary course
of performing a director's duties, of a risk of a serious injury to the
Registrant or its shareholders, (v) for acts or omissions that constitute an
unexcused pattern of inattention that amounts to an abdication of the director's
duty to the Registrant or its shareholders, (vi) under Section 310 of the
California Corporations Code (the "California Code") (concerning contracts or
transactions between the Registrant and a director) or (vii) under Section 316
of the California Code (concerning directors' liability for improper dividends,
loans and guarantees). The provision does not extend to acts or omissions of a
director in his capacity as an officer. Further, the provision will not affect
the availability of injunctions and other equitable remedies available to the
Registrant's shareholders for any violation of a director's fiduciary duty to
the Registrant or its shareholders.
 
    The Registrant's Articles of Incorporation also include an authorization for
the Registrant to indemnify its agents (as defined in Section 317 of the
California Code), through bylaw provisions, by agreement or otherwise, to the
fullest extent permitted by law. Pursuant to this latter provision, the
Registrant's Bylaws provide for indemnification of the Registrant's directors,
officers and employees. In addition, the Registrant, at its discretion, may
provide indemnification to persons whom the Registrant is not obligated to
indemnify. The Bylaws also allow the Registrant to enter into indemnity
agreements with individual directors, officers, employees and other agents.
These indemnity agreements have been entered into with all directors and provide
the maximum indemnification permitted by law. These agreements, together with
the Registrant's Bylaws and Articles of Incorporation, may require the
Registrant, among other things, to indemnify such directors against certain
liabilities that may arise by reason of their status or service as directors
(other than liabilities resulting from willful misconduct of a culpable nature),
to advance expenses to them as they are incurred, provided that they undertake
to repay the amount advanced if it is ultimately determined by a court that they
are not entitled to indemnification, and to obtain directors' and officers'
insurance if available on reasonable terms.
 
    Section 317 of the California Code and the Registrant's Bylaws make
provision for the indemnification of officers, directors and other corporate
agents in terms sufficiently broad to indemnify such persons, under certain
circumstances, for liabilities (including reimbursement of expenses incurred)
arising under the Securities Act.
 
    The Registrant maintains director and officer liability insurance.
 
    Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities Act
and is, therefore, unenforceable.
 
                                      II-1

ITEM 21.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.
 
    a.  Exhibits
 


EXHIBIT
NUMBER EXHIBIT DESCRIPTION
- ------ --------------------------------------------------------------------------
    
  1.1  Dealer Manager Agreement**
 
  2.1  Agreement and Plan of Reorganization dated as of March 24, 1998, by and
         among the Registrant, Odd's-N-End's Acquisition Corp. and Odd's-N-End's,
         Inc.*
 
  3.1  Amended and Restated Articles of Incorporation of the Registrant.*
 
  3.2  Amended and Restated Bylaws of the Registrant.(1)
 
  4.1  Specimen certificate evidencing Common Stock of the Registrant.(1)
 
  5.1  Opinion of Troop Meisinger Steuber & Pasich, LLP.**
 
 10.1  Form of Indemnification Agreement and Schedule of Indemnified Parties.(1)
 
 10.2  Business Loan Agreement, dated January 21, 1997, by and between the
         Registrant and Bank of America National Trust and Savings Association;
         Amendment No. 1 thereto, dated May 20, 1997; and Amendment No. 2
         thereto, dated December 11, 1997.(2)
 
 10.3  Form of Tax Indemnification Agreement, between and among the Registrant
         and the Existing Shareholders.(1)
 
 10.4  1996 Stock Option Plan.(1)
 
 10.5  Lease for 730 West Foothill Boulevard, Azusa, California, dated as of
         December 1, 1995, by and between the Registrant as Tenant and HKJ Gold,
         Inc. as Landlord, as amended(1).
 
 10.6  Lease for 13023 Hawthorne Boulevard, Hawthorne, California, dated April 1,
         1994, by and between the Registrant as Tenant and HKJ Gold, Inc. as
         Landlord, as amended.(1)
 
 10.7  Lease for 6161 Atlantic Boulevard, Maywood, California, dated November 11,
         1985, by and between the Registrant as Lessee and David and Sherry Gold,
         among others, as Lessors.(1)
 
 10.8  Lease for 14139 Paramount Boulevard, Paramount, California, dated as of
         March 1, 1996, by and between the Registrant as Tenant and 14139
         Paramount Properties as Landlord, as amended.(1)
 
 10.9  Release Agreement, dated March 25, 1996, regarding 11382 Beach Boulevard,
         Stanton, California, by and between the Registrant and 11382 Beach
         Partnership.(1)
 
 10.10 Lease for 6124 Pacific Boulevard, Huntington Park, California, dated
         January 31, 1991, by and between the Registrant as Tenant and David and
         Sherry Gold as the Landlord, as amended.(1)
 
 10.11 Lease for 14901 Hawthorne Boulevard, Lawndale, California, dated November
         1, 1991, by and between Howard Gold, Karen Schiffer and Jeff Gold, dba
         14901 Hawthorne Boulevard Partnership as Landlord and the Registrant as
         Tenant, as amended.(1)
 
 10.12 Lease for 5599 Atlantic Avenue, North Long Beach, California, dated August
         13, 1992, by and between the Registrant as Tenant and HKJ Gold, Inc. as
         Landlord, as amended.(1)
 
 10.13 Lease for 1514 North Main Street, Santa Ana, California, dated as of
         November 12, 1993, by and between the Registrant as Tenant and Howard
         Gold, Jeff Gold, Eric J. Schiffer and Karen R. Schiffer as Landlord, as
         amended.(1)

 
                                      II-2



EXHIBIT
NUMBER EXHIBIT DESCRIPTION
- ------ --------------------------------------------------------------------------
    
 10.14 Lease for 6121 Wilshire Boulevard, Los Angeles, California, dated as of
         July 1, 1993, by and between the Registrant as Tenant and HKJ Gold, Inc.
         as Landlord, as amended; and lease for 6101 Wilshire Boulevard, Los
         Angeles, California, dated as of December 1, 1995, by and between the
         Registrant as Tenant and David and Sherry Gold as Landlord, as
         amended.(1)
 
 10.15 Lease for 8625 Woodman Avenue, Arleta, California, dated as of July 8,
         1993, by and between the Registrant as Tenant and David and Sherry Gold
         as Landlord, as amended.(1)
 
 10.16 Lease for 2566 East Florence Avenue, Walnut Park, California, dated as of
         April 18, 1994, by and between HKJ Gold, Inc. as Landlord and the
         Registrant as Tenant, as amended.(1)
 
 10.17 Lease for 3420 West Lincoln Avenue, Anaheim, California, dated as of March
         1, 1996, by and between the Registrant as Tenant and HKJ Gold, Inc. as
         Landlord, as amended.(1)
 
 10.18 Master Lease for 4000 East Union Pacific Avenue, City of Commerce,
         California ("Warehouse and Distribution Facility Lease"), dated as of
         December 20, 1993, by and between the Registrant as Lessee and TBC
         Realty II Corporation ("TBC") as Lessor, together with Lease Guaranty
         ("Lease Guaranty"), dated December 20, 1993, by and between Sherry and
         David Gold and TBC with respect thereto and Letter Agreement, dated
         December 15, 1993, among Registrant, The Mead Corporation, TBC and
         Citicorp Leasing, Inc. with respect to the Lease Guaranty.(1)
 
 10.10 Hawaiian Gardens Indemnity Agreement, dated as of March 25, 1996, by and
         between the Registrant and HKJ Gold, Inc.(1)
 
 10.20 North Broadway Indemnity Agreement, dated as of May 1, 1996, by and
         between HKJ Gold, Inc. and the Registrant.(1)
 
 10.21 Lease for 2606 North Broadway, Los Angeles, California, dated as of May 1,
         1996, by and between HKJ Gold, Inc. as Landlord and the Registrant as
         Tenant.(1)
 
 10.22 Grant Deed concerning 8625 Woodman Avenue, Arleta, California, dated May
         2, 1996, made by David Gold and Sherry Gold in favor of Au Zone
         Investments #2, L.P., a California limited partnership.(1)
 
 10.23 Grant Deed concerning 6101 Wilshire Boulevard, Los Angeles, California,
         dated May 2, 1996, made by David Gold and Sherry Gold in favor of Au
         Zone Investments #2, L.P., a California limited partnership.(1)
 
 10.24 Grant Deed concerning 6124 Pacific Boulevard, Huntington Park, California,
         dated May 2, 1996, made by David Gold and Sherry Gold in favor of Au
         Zone Investments #2, L.P., a California limited partnership.(1)
 
 10.25 Grant Deed concerning 14901 Hawthorne Boulevard, Lawndale, California,
         dated May 2, 1996, made by Howard Gold, Karen Schiffer and Jeff Gold in
         favor of Au Zone Investments #2, L.P., a California limited
         partnership.(1)
 
 10.26 Lease for 12123-12125 Carson Street, Hawaiian Gardens, California, dated
         February 8, 1995, by and between the Hawaiian Gardens Redevelopment
         Agency and 99 CENTS Only Stores.*
 
 10.27 Irrevocable Proxy between Universal and the Registrant.*
 
 10.28 Stockholder Support Agreement between Mark Ravich and the Registrant dated
         as of February 24, 1998.*

 
                                      II-3



EXHIBIT
NUMBER EXHIBIT DESCRIPTION
- ------ --------------------------------------------------------------------------
    
 10.29 Stockholder Support Agreement between Norman Ravich and the Registrant
         dated as of February 24, 1998.*
 
 10.30 Stockholder Support Agreement between Alyssa Danielle Ravich 1991
         Irrevocable Trust and the Registrant dated as of February 24, 1998.*
 
 10.31 Stockholder Support Agreement between Alexander Coleman Ravich 1991
         Irrevocable Trust and the Registrant dated as of February 24, 1998.*
 
 10.32 Stockholder Support Agreement between Norman J. Ravich Irrevocable Trust
         and the Registrant dated as of February 24, 1998.*
 
 10.33 Stockholder Support Agreement between the Norman and Sally Ravich Family
         Trust and the Registrant dated as of February 24, 1998.*
 
 10.34 Option Agreements between the Registrant and Mark Ravich dated as of
         February 26, 1998.*
 
 10.35 Option Agreement between the Registrant and Norman Ravich dated as of
         February 26, 1998.*
 
 10.36 Consulting Agreement between the Registrant and Mark Ravich dated as of
         February 24, 1998.*
 
 10.37 Consulting Agreement between the Registrant and Norman Ravich dated as of
         February 26, 1998.*
 
 10.38 Cooperation Agreement between Universal and the Registrant dated as of
         March 4, 1998.*
 
 10.39 Grant Deed concerning 12123-12125 Carson Street, Hawaiian Gardens,
         California dated March 11, 1997 made by The Hawaiian Gardens
         Redevelopment Agency in favor of Au Zone Investments #2, L.P., a
         California limited partnership.*
 
 13.1  Universal International, Inc. Annual Report on Form 10-K.*
 
 21.1  Subsidiaries of the Registrant.*
 
 23.1  Consent of Troop Meisinger Steuber & Pasich, LLP (included in Exhibit
         5.1).**
 
 23.2  Consent of Arthur Andersen LLP.*
 
 23.3  Consent of Arthur Andersen LLP.*
 
 23.4  Consent of Coopers & Lybrand L.L.P.*
 
 24.1  Power of Attorney (included on page II-5).**
 
 99.1  Form of Letter of Transmittal.**
 
 99.2  Form of Notice of Guaranteed Delivery.**
 
 99.3  Form of Letter to Brokers, Dealers, Commercial Banks.**
 
 99.4  Form of Letter to Clients.**
 
 99.5  Guidelines for Certification of Taxpayer Identification Number on
         Substitute Form W-9.**
 
 99.6  Form of Exchange Agent Agreement.**

 
- ------------------------
 
*   Filed herewith.
 
**  To be filed by amendment.
 
                                      II-4

(1) Incorporated by reference from the Company's Registration Statement on Form
    S-1 as filed with the Securities and Exchange Commission on May 21, 1996.
 
(2) Incorporated by reference from the Company's Registration Statement on Form
    S-3 as filed with the Securities and Exchange Commission on March 31, 1998.
 
ITEM 22.  UNDERTAKINGS.
 
    The undersigned Registrant hereby undertakes:
 
    (1) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers, and controlling persons of
the registrant pursuant to the foregoing provisions, or otherwise, the
registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the
Securities Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in
the opinion of its counsel the matter has been settled by a controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such issue.
 
    (2) The undersigned registrant hereby undertakes:
 
        (a) To file, during any period in which offers or sales are being made,
    a post-effective amendment to this registration statement:
 
            (i) To include any prospectus required by Section 10(a)(3) of the
       Securities Act of 1933;
 
            (ii) To reflect in the prospectus any facts or events arising after
       the effective date of the registration statement (or the most recent
       post-effective amendment thereof) which, individually or in the
       aggregate, represent a fundamental change in the information set forth in
       the registration statement. Notwithstanding the foregoing, any increase
       or decrease in volume of securities offered (if the total dollar value of
       securities offered would not exceed that which was registered) and any
       deviation from the low or high end of the estimated maximum offering
       range may be reflected in the form of prospectus filed with the
       Commission pursuant to Rule 424(b) if, in the aggregate, the changes in
       volume and price represent no more than a 20 percent change in the
       maximum aggregate offering price set forth in the "Calculation of
       Registration Fee" table in the effective registration statement;
 
           (iii) To include any material information with respect to the plan of
       distribution not previously disclosed in the registration statement or
       any material change to such information in the registration statement.
 
        (b) That, for the purpose of determining any liability under the
    Securities Act of 1933, each such post-effective amendment shall be deemed
    to be a new registration statement relating to the securities offered
    therein, and the offering of such securities at that time shall be deemed to
    be the initial bona fide offering thereof.
 
        (c) To remove from registration by means of a post-effective amendment
    any of the securities being registered which remain unsold at the
    termination of the offering.
 
    (3) The undersigned registrant hereby undertakes to respond to requests for
information that are incorporated by reference into the prospectus pursuant to
Item 4, 10(b), 11 or 13 of this Form, within one business day of receipt of such
request, and to send the incorporated documents by first-class mail or other
 
                                      II-5

equally prompt means. This includes information contained in documents filed
subsequent to effective date of the registration statement through the date of
responding to the request.
 
    (4) The undersigned registrant hereby undertakes to supply by means of a
post-effective amendment all information concerning a transaction, and the
company being acquired involved therein, that was not the subject of and
included in the registration statement when it became effective.
 
    (5) The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrant's annual report pursuant to Section 13(a) or 15(d) of the Securities
Exchange Act of 1934 (and, where applicable, each filing of an employee benefit
plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of
1934) that is incorporated by reference in the registration statement shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial BONA FIDE offering thereof.
 
                                      II-6

                                   SIGNATURES
 
    Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-4 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Los Angeles, State of California, on April 16, 1998.
 

                               
                                99CENTS ONLY STORES
 
                                By:              /s/ ERIC SCHIFFER
                                     -----------------------------------------
                                                   Eric Schiffer,
                                          SENIOR VICE PRESIDENT OF FINANCE
                                            AND OPERATIONS AND TREASURER

 
                               POWER OF ATTORNEY
 
    Each person whose signature appears below constitutes and appoints David
Gold and Eric Schiffer, as his true and lawful attorneys-in-fact and agents with
full power of substitution and resubstitution, for him and his name, place and
stead, in any and all capacities, to sign any or all amendments (including post
effective amendments) to this Registration Statement and a new Registration
Statement filed pursuant to Rule 462(b) of the Securities Act of 1933 and to
file the same, with all exhibits thereto, and other documents in connection
therewith, with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents, and each of them, full power and authority to do
and perform each and every act and thing requisite and necessary to be done in
and about the foregoing, as fully to all intents and purposes as he might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or either of them, or their substitutes, may
lawfully do or cause to be done by virtue hereof.
 
    Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons, in the
capacities indicated.
 
          SIGNATURE                       TITLE                    DATE
- ------------------------------  --------------------------  -------------------
 
        /s/ DAVID GOLD
- ------------------------------  Chairman of the Board and     April 16, 1998
          David Gold              Chief Executive Officer
 
       /s/ HOWARD GOLD          Senior Vice President of
- ------------------------------    Distribution and            April 16, 1998
         Howard Gold              Director
 
                                Senior Vice President of
        /s/ JEFF GOLD             Real Estate and
- ------------------------------    Information Systems and     April 16, 1998
          Jeff Gold               Director
 
      /s/ ERIC SCHIFFER         Senior Vice President of
- ------------------------------    Finance and Operations,     April 16, 1998
        Eric Schiffer             Treasurer and Director
 
                                      II-7


                                                      
    /s/ LAWRENCE GLASCOTT
- ------------------------------  Director                      April 16, 1998
      Lawrence Glascott
 
     /s/ MARVIN L. HOLEN
- ------------------------------  Director                      April 16, 1998
       Marvin L. Holen
 
       /s/ BEN SCHWARTZ
- ------------------------------  Director                      April 16, 1998
         Ben Schwartz

 
                                      II-8