OFFER TO PURCHASE FOR CASH
                 ALL OF THE OUTSTANDING SHARES OF COMMON STOCK

                                       OF

                                MULTEX.COM, INC.
                                       AT

                              $7.35 NET PER SHARE
                                       BY

                         PROTON ACQUISITION CORPORATION
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF

                               REUTERS GROUP PLC

THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
TIME, ON TUESDAY, MARCH 25, 2003, UNLESS THE OFFER IS EXTENDED.

                                                               February 26, 2003

To Our Clients:

     Enclosed for your consideration is an Offer to Purchase, dated February 26,
2003 (the "Offer to Purchase"), and the related Letter of Transmittal (which,
together with any amendments or supplements thereto, collectively constitute the
"Offer") relating to the offer by Proton Acquisition Corporation, a Delaware
corporation ("Purchaser") and an indirect wholly owned subsidiary of Reuters
Group PLC, a public limited company organized under the laws England and Wales
("Reuters"), to purchase all of the outstanding shares of common stock, par
value $0.01 per share (the "Multex Common Stock"), of Multex.com, Inc., a
Delaware corporation ("Multex") at $7.35 per share of Multex Common Stock, net
to the seller in cash, without interest thereon, upon the terms and subject to
the conditions set forth in the Offer to Purchase.

     WE ARE (OR OUR NOMINEE IS) THE HOLDER OF RECORD OF SHARES OF MULTEX COMMON
STOCK HELD BY US FOR YOUR ACCOUNT. A TENDER OF THE SHARES OF MULTEX COMMON STOCK
HELD BY US FOR YOUR ACCOUNT CAN BE MADE ONLY BY US AS THE HOLDER OF RECORD AND
PURSUANT TO YOUR INSTRUCTIONS. ACCORDINGLY, WE REQUEST INSTRUCTIONS AS TO
WHETHER YOU WISH TO TENDER ANY OR ALL OF THE SHARES OF MULTEX COMMON STOCK HELD
BY US FOR YOUR ACCOUNT, PURSUANT TO THE TERMS AND SUBJECT TO THE CONDITIONS SET
FORTH IN THE OFFER TO PURCHASE. YOU SHOULD FORWARD YOUR INSTRUCTIONS TO US
PROMPTLY IN ORDER TO PERMIT US TO SUBMIT A TENDER ON YOUR BEHALF PRIOR TO THE
EXPIRATION OF THE OFFER.

     NOTE THAT WE HAVE FURNISHED THE LETTER OF TRANSMITTAL TO YOU FOR YOUR
INFORMATION ONLY. YOU CANNOT USE THE LETTER OF TRANSMITTAL YOURSELF TO TENDER
SHARES OF MULTEX COMMON STOCK HELD BY US FOR YOUR ACCOUNT.

     Your attention is directed to the following:

     1.  The Offer price is $7.35 per share of Multex Common Stock, net to the
         seller in cash, without interest thereon, upon the terms and subject to
         the conditions of the Offer to Purchase (the "Per Share Amount").

     2.  The Offer is being made for all of the outstanding shares of Multex
         Common Stock.


     3.  THE BOARD OF DIRECTORS OF MULTEX, ACTING ON THE UNANIMOUS
         RECOMMENDATION OF A SPECIAL COMMITTEE OF THE BOARD OF DIRECTORS
         COMPRISED ENTIRELY OF INDEPENDENT DIRECTORS, HAS UNANIMOUSLY DETERMINED
         THAT THE MERGER AGREEMENT AND THE TENDER AGREEMENT (BOTH AS DEFINED IN
         THE INTRODUCTION TO THE OFFER TO PURCHASE) AND THE TRANSACTIONS
         CONTEMPLATED THEREBY, INCLUDING, BUT NOT LIMITED TO, THE OFFER AND THE
         MERGER (AS DEFINED IN THE INTRODUCTION TO THE OFFER TO PURCHASE), ARE
         FAIR TO AND IN THE BEST INTERESTS OF MULTEX AND ITS STOCKHOLDERS, HAS
         UNANIMOUSLY APPROVED AND DECLARED ADVISABLE THE MERGER AGREEMENT AND
         THE TENDER AGREEMENT AND UNANIMOUSLY RECOMMENDS THAT MULTEX'S
         STOCKHOLDERS ACCEPT THE OFFER, TENDER THEIR SHARES OF MULTEX COMMON
         STOCK PURSUANT TO THE OFFER AND APPROVE AND ADOPT THE MERGER AGREEMENT
         AND THE MERGER AND THE TRANSACTIONS CONTEMPLATED THEREBY.

     4.  THE OFFER AND WITHDRAWAL RIGHTS EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
         TIME, ON TUESDAY, MARCH 25, 2003 (THE "EXPIRATION DATE"), UNLESS THE
         OFFER IS EXTENDED BY PURCHASER.

     5.  THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, (I) THERE HAVING
         BEEN PROPERLY AND VALIDLY TENDERED PURSUANT TO THE OFFER AND NOT
         WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER A NUMBER OF SHARES OF
         MULTEX COMMON STOCK WHICH, TOGETHER WITH THE NUMBER OF SHARES OF MULTEX
         COMMON STOCK OWNED BY REUTERS, PURCHASER OR ANY OF THEIR RESPECTIVE
         AFFILIATES, IF ANY, REPRESENTS AT LEAST A MAJORITY OF THE TOTAL ISSUED
         AND OUTSTANDING SHARES OF MULTEX COMMON STOCK (ASSUMING THE EXERCISE OF
         ALL OPTIONS, WARRANTS AND OTHER RIGHTS TO PURCHASE SHARES OF MULTEX
         COMMON STOCK WHICH ARE THEN OR WHICH WILL BE WITHIN SIX MONTHS
         THEREAFTER VESTED AND EXERCISABLE) AND (II) THE TERMINATION OR
         EXPIRATION OF ANY APPLICABLE WAITING PERIOD UNDER THE HART-SCOTT-RODINO
         ANTITRUST IMPROVEMENTS ACT OF 1976, AS AMENDED, AND THE TERMINATION,
         EXPIRATION OR OTHER SATISFACTION OF ANY OTHER COMPARABLE PROVISIONS
         UNDER ANY APPLICABLE PRE-MERGER NOTIFICATION LAWS OR REGULATIONS OF
         FOREIGN JURISDICTIONS. THE CONSUMMATION OF THIS OFFER IS ALSO SUBJECT
         TO THE OTHER CONDITIONS DESCRIBED IN "THE TENDER OFFER -- CERTAIN
         CONDITIONS OF THE OFFER" IN THE OFFER TO PURCHASE.

     6.  Purchaser will pay any stock transfer taxes with respect to the
         transfer and a sale of shares of Multex Common Stock to Purchaser will
         be borne by Purchaser, except as otherwise provided in Instruction 6 of
         the Letter of Transmittal.

     If you wish to have us tender any of or all of the shares of Multex Common
Stock held by us for your account, please so instruct us by completing,
executing, detaching and returning to us the instruction form on the detachable
part hereof. If you authorize the tender of your shares of Multex Common Stock,
all such shares of Multex Common Stock will be tendered unless otherwise
indicated in such instruction form. An envelope in which to return your
instructions to us is enclosed. PLEASE FORWARD YOUR INSTRUCTIONS TO US AS SOON
AS POSSIBLE TO ALLOW US AMPLE TIME TO TENDER SHARES OF MULTEX COMMON STOCK ON
YOUR BEHALF PRIOR TO THE EXPIRATION DATE.

     Payment for shares of Multex Common Stock accepted for payment pursuant to
the Offer will be in all cases made only after timely receipt by American Stock
Transfer & Trust Company (the "Depositary") of all of the following:

          (a) the certificates for such shares of Multex Common Stock in proper
     form for transfer, or a timely confirmation of the book-entry transfer of
     such shares of Multex Common Stock into the Depositary's
                                        2


     account at The Depository Trust Company pursuant to the procedures set
     forth in "THE TENDER OFFER -- Procedure for Tendering Shares of Multex
     Common Stock and Warrants" in the Offer to Purchase,

          (b) a properly completed and duly executed Letter of Transmittal (or a
     manually signed facsimile thereof) with any required signature guarantees
     (or, in the case of a book-entry transfer, an Agent's Message (as defined
     "THE TENDER OFFER -- Procedure for Tendering Shares of Multex Common Stock
     and Warrants" in the Offer to Purchase)) and

          (c) any other documents required by the Letter of Transmittal.

     Accordingly, tendering stockholders may be paid at different times
depending upon when certificates for shares of Multex Common Stock or book-entry
confirmations with respect to the same are actually received by the Depositary.

     UNDER NO CIRCUMSTANCES WILL INTEREST BE PAID ON THE PER SHARE AMOUNT,
REGARDLESS OF ANY EXTENSION OF THE OFFER OR ANY DELAY IN MAKING PAYMENT PURSUANT
TO THE OFFER.

     The Offer is not being made to, nor will tenders be accepted from, or on
behalf of, holders of shares of Multex Common Stock in any jurisdiction in which
the making or acceptance of the Offer would not be in compliance with the laws
of such jurisdiction. In any jurisdiction where the securities or blue sky laws
require the Offer to be made by a licensed broker or dealer, the Offer will be
deemed made on behalf of Purchaser by American Stock Transfer & Trust Company,
the Dealer Manager for the Offer, or one or more registered brokers or dealers
that are licensed under the laws of such jurisdiction.

                                        3


                           OFFER TO PURCHASE FOR CASH

                 ALL OF THE OUTSTANDING SHARES OF COMMON STOCK

                                       OF

                                MULTEX.COM, INC.
                                       AT

                              $7.35 NET PER SHARE
                                       BY

                         PROTON ACQUISITION CORPORATION
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF

                               REUTERS GROUP PLC

     The undersigned acknowledge(s) receipt of your letter, the Offer to
Purchase, dated February 26, 2003 (the "Offer to Purchase"), and the related
Letter of Transmittal (which, together with any amendments or supplements
thereto, collectively constitute the "Offer") relating to the offer by Proton
Acquisition Corporation, a Delaware corporation and an indirect wholly owned
subsidiary of Reuters Group PLC, a public limited company organized under the
laws of England and Wales, to purchase for $7.35 net to the seller in cash,
without interest thereon, all of the outstanding shares of common stock, par
value $0.01 per share (the "Multex Common Stock"), of Multex.com, Inc., a
Delaware corporation.

     This will instruct you to tender the number of shares of Multex Common
Stock indicated below (or, if no number is indicated below, all shares of Multex
Common Stock) held by you for the account of the undersigned, on the terms and
subject to the conditions set forth in the Offer.

Number of shares of
Multex Common
Stock to Be Tendered:* --------------------------------------------

Account Number: ------------------------------------------------------

Dated:
- ------------------------------, 2003

                                   SIGN HERE

- ------------------------------------------------
                                  SIGNATURE(S)

- ------------------------------------------------
                                 PRINT NAME(S)

- ------------------------------------------------
                                  ADDRESS(ES)

- ------------------------------------------------
                         AREA CODE AND TELEPHONE NUMBER

- ------------------------------------------------
                  TAX IDENTIFICATION OR SOCIAL SECURITY NUMBER

* Unless otherwise indicated, it will be assumed that all shares of Multex
  Common Stock held by us for your account are to be tendered.