UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-4757 SMITH BARNEY SECTOR SERIES INC. (Exact name of registrant as specified in charter) 125 Broad Street, New York, NY 10004 (Address of principal executive offices) (Zip code) Christina T. Sydor, Esq. 300 First Stamford Place Stamford, CT 06902 (Name and address of agent for service) Registrant's telephone number, including area code: (800) 451-2010 Date of fiscal year end: OCTOBER 31 Date of reporting period: APRIL 30, 2003 ITEM 1. REPORT TO STOCKHOLDERS. The SEMI-ANNUAL Report to Stockholders is filed herewith. SMITH BARNEY SECTOR SERIES INC. SMITH BARNEY HEALTH SCIENCES FUND Research Series | Semi-annual report | April 30, 2003 [LOGO OMITTED] SMITH BARNEY MUTUAL FUNDS YOUR SERIOUS MONEY. PROFESSIONALLY MANAGED(R) YOUR SERIOUS MONEY. PROFESSIONALLY MANAGED.(R) is a registered service mark of Citigroup Global Markets Inc. NOT FDIC INSURED o NOT BANK GUARANTEED o MAY LOSE VALUE [GRAPHIC OMITTED] Research Series Semi-Annual Report o April 30, 2003 SMITH BARNEY HEALTH SCIENCES FUND SMITH BARNEY FUND MANAGEMENT LLC Smith Barney Fund Management LLC is the investment manager to the Fund. Citi Fund Management Inc. is the subadviser. The Fund's management team follows a systematic and rigorous approach designed to provide appropriate exposure to the market sector. FUND OBJECTIVE* The Fund seeks long-term capital appreciation by investing primarily in common stocks. The Fund normally invests at least 80% of its assets in securities of companies principally engaged in the design, manufacture, or sale of products or services used for or in connection with healthcare or medicine. FUND FACTS FUND INCEPTION - ---------------------- February 28, 2000 WHAT'S INSIDE Letter From the Chairman .................................................... 1 Schedule of Investments ..................................................... 2 Statement of Assets and Liabilities ......................................... 4 Statement of Operations ..................................................... 5 Statements of Changes in Net Assets ......................................... 6 Notes to Financial Statements ............................................... 7 Financial Highlights ........................................................ 11 - ---------- * Since the Fund focuses its investments on companies involved in the health sciences, an investment in the Fund may involve a greater degree of risk than an investment in other mutual funds with greater diversification. [LOGO OMITTED] SMITH BARNEY MUTUAL FUNDS YOUR SERIOUS MONEY. PROFESSIONALLY MANAGED(R) YOUR SERIOUS MONEY. PROFESSIONALLY MANAGED.(R) is a registered service mark of Citigroup Global Markets Inc. Investment Products: Not Fdic Insured o Not Bank Guaranteed o May Lose Value LETTER FROM THE CHAIRMAN [GRAPHIC OMITTED] R. JAY GERKEN CHAIRMAN, PRESIDENT AND CHIEF EXECUTIVE OFFICER DEAR SHAREHOLDER, The philosopher Bertrand Russell famously remarked that, "Change is one thing, progress is another." You will notice in the following pages that we have begun to implement some changes to your shareholder report and we will be reflecting other changes in future reports. Our aim is to make meaningful improvements in reporting on the management of your Fund and its performance, not just to enact change for change's sake. Please bear with us during this transition period. We know that you have questions about fund managers' decisions and plans, and we want to be sure that you have easy access to the information you need. Keeping investors informed is, and always will be, one of my top priorities as Chairman of your Fund. To that end, we encourage you to go to our website: www.smithbarneymutualfunds.com(1) where you can find additional insight on your Fund. I invite you to read this report in full. Please take the opportunity to talk to your financial adviser about this report or any other questions or concerns you have about your Fund and your financial future. As always, thank you for entrusting your assets to us. We look forward to helping you continue to meet your financial goals. Sincerely, /s/R. JAY GERKEN - ------------------- R. Jay Gerken Chairman, President and Chief Executive Officer MAY 23, 2003 - ---------- (1) MATTERS REFERENCED ARE NOT INCORPORATED BY REFERENCE UNLESS OTHERWISE STATED. 1 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders SCHEDULE OF INVESTMENTS (UNAUDITED) APRIL 30, 2003 SHARES SECURITY VALUE ============================================================================================= COMMON STOCK -- 99.6% BIOTECHNOLOGY -- 15.0% 74,636 Amgen Inc.* $ 4,575,933 67,600 Enzon Pharmaceuticals, Inc.* 927,472 21,000 Genentech, Inc.* 797,790 8,810 Genzyme Corp.* 354,867 35,488 Gilead Sciences, Inc.* 1,637,416 9,700 IDEC Pharmaceuticals Corp.* 317,675 - --------------------------------------------------------------------------------------------- 8,611,153 - --------------------------------------------------------------------------------------------- HOSPITAL NURSING MANAGEMENT -- 3.5% 52,200 HCA Inc. 1,675,620 24,100 Tenet Healthcare Corp.* 357,644 - --------------------------------------------------------------------------------------------- 2,033,264 - --------------------------------------------------------------------------------------------- MAJOR PHARMACEUTICALS -- 50.0% 104,812 Abbott Laboratories 4,258,511 29,600 Biovail Corp.* 1,070,040 46,998 Bristol-Myers Squibb Co. 1,200,329 43,904 Eli Lilly & Co. 2,801,953 99,944 Johnson & Johnson 5,632,844 49,214 Merck & Co. Inc. 2,863,271 186,678 Pfizer Inc. 5,740,348 25,800 Teva Pharmaceutical Industries Ltd., Sponsored ADR 1,204,860 91,462 Wyeth 3,981,341 - --------------------------------------------------------------------------------------------- 28,753,497 - --------------------------------------------------------------------------------------------- MANAGED HEALTHCARE -- 3.8% 8,300 Aetna Inc. 413,340 8,200 Anthem, Inc.* 562,848 7,854 UnitedHealth Group Inc. 723,589 6,188 WellPoint Health Networks, Inc.* 469,917 - --------------------------------------------------------------------------------------------- 2,169,694 - --------------------------------------------------------------------------------------------- MEDICAL/DENTAL DISTRIBUTORS -- 2.5% 15,496 Cardinal Health, Inc. 856,619 20,454 McKesson, Inc. 567,394 - --------------------------------------------------------------------------------------------- 1,424,013 - --------------------------------------------------------------------------------------------- MEDICAL ELECTRONICS -- 12.8% 26,100 Boston Scientific Corp.* 1,123,605 11,400 Guidant Corp.* 444,486 85,054 Medtronic, Inc. 4,060,478 32,700 St. Jude Medical, Inc. 1,715,442 - --------------------------------------------------------------------------------------------- 7,344,011 - --------------------------------------------------------------------------------------------- MEDICAL SPECIALTIES -- 5.1% 21,634 Baxter International Inc. 497,582 14,027 Becton, Dickinson & Co. 496,556 5,849 C.R. Bard, Inc. 370,710 34,000 Zimmer Holdings, Inc.* 1,594,600 - --------------------------------------------------------------------------------------------- 2,959,448 - --------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS. 2 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders SCHEDULE OF INVESTMENTS (UNAUDITED) (CONTINUED) APRIL 30, 2003 SHARES SECURITY VALUE ============================================================================================= OTHER PHARMACEUTICALS -- 4.9% 6,239 Allergan, Inc. $ 438,290 5,400 AmerisourceBergen Corp. 312,390 39,700 Forest Laboratories, Inc.* 2,053,284 - --------------------------------------------------------------------------------------------- 2,803,964 - --------------------------------------------------------------------------------------------- SERVICES TO THE HEALTH INDUSTRY -- 2.0% 18,700 Alcon, Inc.* 823,735 20,153 IMS Health, Inc. 310,356 - --------------------------------------------------------------------------------------------- 1,134,091 - --------------------------------------------------------------------------------------------- TOTAL COMMON STOCK (Cost-- $57,949,283) 57,233,135 ============================================================================================= FACE AMOUNT SECURITY VALUE ============================================================================================= REPURCHASE AGREEMENT -- 0.4% $224,000 UBS PaineWebber Inc., 1.330% due 5/1/03; Proceeds at maturity -- $224,008; (Fully collateralized by Fannie Mae Bonds, 3.550% due 6/11/04; Market value-- $233,738) (Cost-- $224,000) 224,000 ============================================================================================= TOTAL INVESTMENTS -- 100% (Cost-- $58,173,283**) $57,457,135 ============================================================================================= * NON-INCOME PRODUCING SECURITY. ** AGGREGATE COST FOR FEDERAL INCOME TAX PURPOSES IS SUBSTANTIALLY THE SAME. Abbreviation used in this schedule: ----------------------------------- ADR -- American Depositary Receipt SEE NOTES TO FINANCIAL STATEMENTS. 3 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders STATEMENT OF ASSETS AND LIABILITIES (UNAUDITED) APRIL 30, 2003 ASSETS: Investments, at value (Cost-- $58,173,283) $57,457,135 Cash 412 Receivable for securities sold 1,425,409 Receivable for Fund shares sold 53,039 Dividends and interest receivable 41,161 - --------------------------------------------------------------------------------------------- TOTAL ASSETS 58,977,156 - --------------------------------------------------------------------------------------------- LIABILITIES: Payable for Fund shares purchased 67,131 Distribution fees payable 37,555 Management fee payable 29,580 Accrued expenses 139,717 - --------------------------------------------------------------------------------------------- TOTAL LIABILITIES 273,983 - --------------------------------------------------------------------------------------------- TOTAL NET ASSETS $58,703,173 ============================================================================================= NET ASSETS: Par value of capital shares $ 5,860 Capital paid in excess of par value 73,239,149 Accumulated net investment loss (252,218) Accumulated net realized loss from security transactions (13,573,470) Net unrealized depreciation of investments (716,148) - --------------------------------------------------------------------------------------------- TOTAL NET ASSETS $58,703,173 ============================================================================================= SHARES OUTSTANDING: Class A 1,584,340 ---------------------------------------------------------------------------------------- Class B 2,660,189 ---------------------------------------------------------------------------------------- Class L 1,615,374 ---------------------------------------------------------------------------------------- NET ASSET VALUE: Class A (and redemption price) $10.19 ---------------------------------------------------------------------------------------- Class B * $9.95 ---------------------------------------------------------------------------------------- Class L ** $9.95 ---------------------------------------------------------------------------------------- MAXIMUM PUBLIC OFFERING PRICE PER SHARE: Class A (net asset value plus 5.26% of net asset value per share) $10.73 ---------------------------------------------------------------------------------------- Class L (net asset value plus 1.01% of net asset value per share) $10.05 ============================================================================================= * REDEMPTION PRICE IS NAV OF CLASS B SHARES REDUCED BY A 5.00% CDSC IF SHARES ARE REDEEMED WITHIN ONE YEAR FROM PURCHASE (SEE NOTE 2). ** REDEMPTION PRICE IS NAV OF CLASS L SHARES REDUCED BY A 1.00% CDSC IF SHARES ARE REDEEMED WITHIN THE FIRST YEAR OF PURCHASE (SEE NOTE 2). SEE NOTES TO FINANCIAL STATEMENTS. 4 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders STATEMENT OF OPERATIONS (UNAUDITED) FOR THE SIX MONTHS ENDED APRIL 30, 2003 INVESTMENT INCOME: Dividends $ 336,129 Interest 2,408 - --------------------------------------------------------------------------------------------- TOTAL INVESTMENT INCOME 338,537 - --------------------------------------------------------------------------------------------- EXPENSES: Management fee (Note 2) 230,387 Distribution fees (Note 7) 229,144 Shareholder servicing fees (Note 7) 47,603 Shareholder communications (Note 7) 24,616 Custody 17,856 Audit and legal 14,480 Registration fees 7,240 Directors' fees 5,837 Other 9,412 - --------------------------------------------------------------------------------------------- TOTAL EXPENSES 586,575 - --------------------------------------------------------------------------------------------- NET INVESTMENT LOSS (248,038) - --------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS (NOTE 3): Realized Loss From Security Transactions (excluding short-term securities): Proceeds from sales 25,857,484 Cost of securities sold 33,343,670 - --------------------------------------------------------------------------------------------- NET REALIZED LOSS (7,486,186) - --------------------------------------------------------------------------------------------- Change in Net Unrealized Depreciation of Investments: Beginning of period (10,290,175) End of period (716,148) - --------------------------------------------------------------------------------------------- DECREASE IN NET UNREALIZED DEPRECIATION 9,574,027 - --------------------------------------------------------------------------------------------- NET GAIN ON INVESTMENTS 2,087,841 - --------------------------------------------------------------------------------------------- INCREASE IN NET ASSETS FROM OPERATIONS $ 1,839,803 ============================================================================================= SEE NOTES TO FINANCIAL STATEMENTS. 5 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders STATEMENTS OF CHANGES IN NET ASSETS FOR THE SIX MONTHS ENDED APRIL 30, 2003 (UNAUDITED) AND THE YEAR ENDED OCTOBER 31, 2002 2003 2002 ============================================================================================= OPERATIONS: Net investment loss $ (248,038) $ (839,297) Net realized loss (7,486,186) (5,535,227) (Increase) decrease in net unrealized depreciation 9,574,027 (11,767,125) - --------------------------------------------------------------------------------------------- INCREASE (DECREASE) IN NET ASSETS FROM OPERATIONS 1,839,803 (18,141,649) - --------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREHOLDERS FROM (NOTE 6): Net realized gains -- (1,075,678) - --------------------------------------------------------------------------------------------- DECREASE IN NET ASSETS FROM DISTRIBUTIONS TO SHAREHOLDERS -- (1,075,678) - --------------------------------------------------------------------------------------------- FUND SHARE TRANSACTIONS (NOTE 8): Net proceeds from sale of shares 4,159,098 16,062,165 Net asset value of shares issued for reinvestment of dividends -- 1,025,003 Cost of shares reacquired (7,235,403) (18,814,714) - --------------------------------------------------------------------------------------------- DECREASE IN NET ASSETS FROM FUND SHARE TRANSACTIONS (3,076,305) (1,727,546) - --------------------------------------------------------------------------------------------- DECREASE IN NET ASSETS (1,236,502) (20,944,873) NET ASSETS: Beginning of period 59,939,675 80,884,548 - --------------------------------------------------------------------------------------------- END OF PERIOD* $58,703,173 $59,939,675 ============================================================================================= * Includes accumulated net investment loss of: $(252,218) $(4,180) ============================================================================================= SEE NOTES TO FINANCIAL STATEMENTS. 6 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders NOTES TO FINANCIAL STATEMENTS (UNAUDITED) 1. SIGNIFICANT ACCOUNTING POLICIES The Smith Barney Health Sciences Fund ("Fund"), a separate investment fund of the Smith Barney Sector Series Inc. ("Series"), a Maryland corporation, is registered under the Investment Company Act of 1940, as amended, as a non-diversified, open-end management investment company. The Series consists of this Fund and two other separate investment funds: Smith Barney Financial Services Fund and Smith Barney Technology Fund. The financial statements and financial highlights for the other funds are presented in separate shareholder reports. The significant accounting policies followed by the Fund are: (a) security transactions are accounted for on trade date; (b) securities traded in national securities markets are valued at the closing prices in the primary exchange on which they are traded; securities listed or traded on certain foreign exchanges or other markets whose operations are similar to the U.S. over-the-counter market (including securities listed on exchanges where the primary market is believed to be over-the-counter) and securities for which no sale was reported on that date are valued at the mean between the bid and asked prices; securities listed on the NASDAQ National Market System for which market quotations are available are valued at the official closing price or, if there is no official closing price on that day, at the last sales price. Securities which are listed or traded on more than one exchange or market are valued at the quotations on the exchange or market determined to be the primary market for such securities; (c) securities for which market quotations are not available will be valued in good faith at fair market value by or under the direction of the Board of Directors; (d) securities maturing within 60 days are valued at cost plus accreted discount, or minus amortized premium, which approximates value; (e) the accounting records of the Fund are maintained in U.S. dollars. All assets and liabilities denominated in foreign currencies are translated into U.S. dollars based on the rate of exchange of such currencies against U.S. dollars on the date of valuation. Purchases and sales of securities, and income and expenses are translated at the rate of exchange quoted on the respective date that such transactions are recorded. Differences between income or expense amounts recorded and collected or paid are adjusted when reported by the custodian; (f) interest income, adjusted for amortization of premium and accretion of discount, is recorded on an accrual basis; (g) dividend income is recorded on the ex-dividend date; foreign dividends are recorded on the ex-dividend date or as soon as practical after the Fund determines the existence of a dividend declaration after exercising reasonable due diligence; (h) dividends and distributions to shareholders are recorded on the ex-dividend date; the Fund distributes dividends and capital gains, if any, annually; (i) gains or losses on the sale of securities are calculated by using the specific identification method; (j) direct expenses are charged to each class; management fees and general Fund expenses are allocated on the basis of relative net assets; (k) the Fund intends to comply with the applicable provisions of the Internal Revenue Code of 1986, as amended, pertaining to regulated investment companies and to make distributions of taxable income sufficient to relieve it from substantially all Federal income and excise taxes; (l) the character of income and gains to be distributed in accordance with income tax regulations which may differ from accounting principles generally accepted in the United States of America; and (m) estimates and assumptions are required to be made regarding assets, liabilities and changes in net assets resulting from operations when financial statements are prepared. Changes in the economic environment, financial markets and any other parameters used in determining these estimates could cause actual results to differ. In addition, the Fund may enter into forward exchange contracts in order to hedge against foreign currency risk. These contracts are marked-to-market daily, by recognizing the difference between the contract exchange rate and the current market rate as an unrealized gain or loss. Realized gains or losses are recognized when contracts are settled. The Fund from time to time may also enter into options and/or futures contracts to hedge market risk. 7 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED) 2. MANAGEMENT AGREEMENT AND OTHER TRANSACTIONS Smith Barney Fund Management LLC ("SBFM"), an indirect wholly-owned subsidiary of Citigroup Inc. ("Citigroup"), acts as investment manager to the Fund. The management fee is computed at an annual rate of 0.80% of the average daily net assets. This fee is calculated daily and paid monthly. SBFM has delegated the daily management of the Fund to Citi Fund Management Inc. ("CFM"), an affiliate of SBFM. For services provided to the Fund, SBFM pays CFM a subadvisory fee computed at an annual rate of 0.50% of the Fund's average daily net assets. Citicorp Trust Bank, fsb. ("CTB"), another subsidiary of Citigroup, acts as the Fund's transfer agent. PFPC Global Fund Services ("PFPC") and Primerica Shareholder Services ("PSS"), another subsidiary of Citigroup, act as the Fund's sub-transfer agents. CTB receives account fees and asset-based fees that vary according to the size and type of account. PFPC and PSS are responsible for shareholder recordkeeping and financial processing for all shareholder accounts and are paid by CTB. For the six months ended April 30, 2003, the Fund paid transfer agent fees of $29,789 to CTB. Citigroup Global Markets Inc. ("CGM"), formerly known as Salomon Smith Barney Inc., and PFS Distributors, Inc., both of which are subsidiaries of Citigroup, act as the Fund's distributors. In addition, CGM and certain other broker-dealers continue to sell Fund shares to the public as members of the selling group. For the six months ended April 30, 2003, CGM and its affiliates did not receive any brokerage commissions. There are maximum initial sales charges of 5.00% and 1.00% for Class A shares and L shares, respectively. There is a contingent deferred sales charge ("CDSC") of 5.00% on Class B shares, which applies if redemption occurs within one year from initial purchase and declines thereafter by 1.00% per year until no CDSC is incurred. Class L shares also have a 1.00% CDSC, which applies if redemption occurs within the first year of purchase. In addition, Class A shares have a 1.00% CDSC, which applies if redemption occurs within the first year of purchase. This CDSC only applies to those purchases of Class A shares which, when combined with current holdings of Class A shares, equal or exceed $1,000,000 in the aggregate. These purchases do not incur an initial sales charge. For the six months ended April 30, 2003, CGM and its affiliates received sales charges of approximately $40,000 and $2,000 on sales of the Fund's Class A and L shares, respectively. In addition, for the six months ended April 30, 2003, CDSCs paid to CGM and its affiliates were approximately $41,000 for Class B shares. All officers and one Director of the Series are employees of Citigroup or its affiliates. 3. Investments During the six months ended April 30, 2003, the aggregate cost of purchases and proceeds from sales of investments (including maturities of long-term securities, but excluding short-term securities) were as follows: ================================================================================ Purchases $21,117,221 - -------------------------------------------------------------------------------- Sales 25,857,484 ================================================================================ 8 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED) At April 30, 2003, the aggregate gross unrealized appreciation and depreciation of investments for Federal income tax purposes were substantially as follows: ================================================================================ Gross unrealized appreciation $ 4,561,784 Gross unrealized depreciation (5,277,932) - -------------------------------------------------------------------------------- Net unrealized depreciation $ (716,148) ================================================================================ 4. Repurchase Agreements The Fund purchases (and its custodian takes possession of) U.S. government securities from securities dealers subject to agreements to resell the securities to the sellers at a future date (generally, the next business day) at an agreed upon higher repurchase price. The Fund requires continual maintenance of the market value (plus accrued interest) of the collateral in amounts at least equal to the repurchase price. 5. Concentration of Risk The Fund normally invests at least 80% of its assets in health related investments. As a result of this concentration policy, the Fund's investments may be subject to greater risk and market fluctuation than a fund that invests in securities representing a broader range of investment alternatives. 6. Distributions Paid to Shareholders by Class SIX MONTHS ENDED YEAR ENDED APRIL 30, 2003 OCTOBER 31, 2002 ================================================================================ NET REALIZED GAINS Class A -- $ 261,497 Class B -- 461,311 Class L -- 352,870 - -------------------------------------------------------------------------------- Total -- $1,075,678 ================================================================================ 7. Class Specific Expenses Pursuant to a Distribution Plan, the Fund pays a service fee with respect to its Class A, B and L shares calculated at the annual rate of 0.25% of the average daily net assets of each respective class. The Fund also pays a distribution fee with respect to Class B and L shares calculated at the annual rate of 0.75% of the average daily net assets of each class, respectively. For the six months ended April 30, 2003, total Distribution Plan fees incurred, which are accrued daily and paid monthly, were as follows: CLASS A CLASS B CLASS L ================================================================================ Distribution Plan Fees $19,613 $127,821 $81,710 ================================================================================ For the six months ended April 30, 2003, total Shareholder Servicing fees were as follows: CLASS A CLASS B CLASS L ================================================================================ Shareholder Servicing Fees $12,976 $21,135 $13,492 ================================================================================ For the six months ended April 30, 2003, total Shareholder Communication expenses were as follows: CLASS A CLASS B CLASS L ================================================================================ Shareholder Communication Expenses $6,844 $11,019 $6,753 ================================================================================ 9 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED) 8. CAPITAL SHARES At April 30, 2003, the Fund had 750 million shares of capital stock authorized with a par value of $0.001 per share. The Fund has the ability to issue multiple classes of shares. Each share of a class represents an identical interest in the Fund and has the same rights, except that each class bears certain expenses specifically related to the distribution of its shares. Transactions in shares of each class were as follows: SIX MONTHS ENDED YEAR ENDED APRIL 30, 2003 OCTOBER 31, 2002 -------------------------- ------------------------- SHARES AMOUNT SHARES AMOUNT ============================================================================================================ CLASS A Shares sold 200,422 $ 1,977,085 507,533 $ 5,868,322 Shares issued on reinvestment -- -- 19,429 253,154 Shares reacquired (267,161) (2,635,530) (433,256) (4,948,112) - ------------------------------------------------------------------------------------------------------------ Net Increase (Decrease) (66,739) $ (658,445) 93,706 $ 1,173,364 ============================================================================================================ CLASS B Shares sold 180,974 $ 1,747,079 643,297 $ 7,469,050 Shares issued on reinvestment -- -- 33,569 431,364 Shares reacquired (243,343) (2,331,621) (673,410) (7,315,315) - ------------------------------------------------------------------------------------------------------------ Net Increase (Decrease) (62,369) $ (584,542) 3,456 $ 585,099 ============================================================================================================ CLASS L Shares sold 44,993 $ 434,934 231,847 $ 2,724,793 Shares issued on reinvestment -- -- 26,497 340,485 Shares reacquired (237,030) (2,268,252) (595,558) (6,551,287) - ------------------------------------------------------------------------------------------------------------ Net Decrease (192,037) $ (1,833,318) (337,214) $(3,486,009) ============================================================================================================ 9. SUBSEQUENT EVENT On January 29, 2003, the Board of Directors of the Series, on behalf of the Smith Barney Biotechnology Fund ("Biotechnology Fund"), a separate investment fund of the Series, approved a proposed reorganization pursuant to which the Fund would acquire the assets and assume the stated liabilities of the Biotechnology Fund in exchange for shares of the Fund. This reorganization will allow Biotechnology Fund shareholders to maintain an investment in a fund with the same investment objective and substantially similar investment policies. On May 7, 2003, the shareholders of the Biotechnology Fund approved the reorganization of the Biotechnology Fund into the Fund. The effective date of the reorganization was May 9, 2003. 10 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders FINANCIAL HIGHLIGHTS FOR A SHARE OF EACH CLASS OF CAPITAL STOCK OUTSTANDING THROUGHOUT EACH YEAR ENDED OCTOBER 31, UNLESS OTHERWISE NOTED: CLASS A SHARES 2003(1)(2) 2002(2) 2001 2000(3) ========================================================================================================================== NET ASSET VALUE, BEGINNING OF PERIOD $ 9.84 $12.72 $14.49 $11.40 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM OPERATIONS: Net investment loss(4) (0.02) (0.07) (0.08) (0.04) Net realized and unrealized gain (loss) 0.37 (2.64) (1.29) 3.13 - -------------------------------------------------------------------------------------------------------------------------- Total Income (Loss) From Operations 0.35 (2.71) (1.37) 3.09 - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS FROM: Net realized gains -- (0.17) (0.40) -- - -------------------------------------------------------------------------------------------------------------------------- Total Distributions -- (0.17) (0.40) -- - -------------------------------------------------------------------------------------------------------------------------- NET ASSET VALUE, END OF PERIOD $ 10.19 $ 9.84 $ 12.72 $ 14.49 - -------------------------------------------------------------------------------------------------------------------------- TOTAL RETURN 3.56%++ (21.65)% (9.83)% 27.11%++ - -------------------------------------------------------------------------------------------------------------------------- NET ASSETS, END OF PERIOD (000S) $16,152 $16,251 $19,806 $16,980 - -------------------------------------------------------------------------------------------------------------------------- RATIOS TO AVERAGE NET ASSETS: Expenses(4)(5) 1.49%+ 1.49% 1.50% 1.52%+ Net investment loss (0.32)+ (0.58) (0.63) (0.67)+ - -------------------------------------------------------------------------------------------------------------------------- PORTFOLIO TURNOVER RATE 37% 26% 34% 26% ========================================================================================================================== CLASS B SHARES 2003(1)(2) 2002(2) 2001 2000(3) ========================================================================================================================== NET ASSET VALUE, BEGINNING OF PERIOD $ 9.64 $ 12.56 $ 14.42 $ 11.40 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM OPERATIONS: Net investment loss(4) (0.05) (0.15) (0.18) (0.09) Net realized and unrealized gain (loss) 0.36 (2.60) (1.28) 3.11 - -------------------------------------------------------------------------------------------------------------------------- Total Income (Loss) From Operations 0.31 (2.75) (1.46) 3.02 - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS FROM: Net realized gains -- (0.17) (0.40) -- - -------------------------------------------------------------------------------------------------------------------------- Total Distributions -- (0.17) (0.40) -- - -------------------------------------------------------------------------------------------------------------------------- NET ASSET VALUE, END OF PERIOD $ 9.95 $ 9.64 $ 12.56 $ 14.42 - -------------------------------------------------------------------------------------------------------------------------- TOTAL RETURN 3.22%++ (22.25)% (10.51)% 26.49%++ - -------------------------------------------------------------------------------------------------------------------------- NET ASSETS, END OF PERIOD (000S) $26,475 $26,258 $34,146 $28,694 - -------------------------------------------------------------------------------------------------------------------------- RATIOS TO AVERAGE NET ASSETS: Expenses(4)(6) 2.24%+ 2.24% 2.25% 2.26%+ Net investment loss (1.07)+ (1.33) (1.38) (1.41)+ - -------------------------------------------------------------------------------------------------------------------------- PORTFOLIO TURNOVER RATE 37% 26% 34% 26% ========================================================================================================================== (1) FOR THE SIX MONTHS ENDED APRIL 30, 2003 (UNAUDITED). (2) PER SHARE AMOUNTS HAVE BEEN CALCULATED USING THE MONTHLY AVERAGE SHARES METHOD. (3) FOR THE PERIOD FROM FEBRUARY 28, 2000 (INCEPTION DATE) TO OCTOBER 31, 2000. (4) THE MANAGER WAIVED A PORTION OF ITS FEES FOR THE YEAR ENDED OCTOBER 31, 2001 AND FOR THE PERIOD ENDED OCTOBER 31, 2000. IF SUCH FEES WERE NOT WAIVED, THE PER SHARE INCREASES TO NET INVESTMENT LOSS AND THE ACTUAL EXPENSE RATIOS WOULD HAVE BEEN AS FOLLOWS: Per Share Increases to Expense Ratios Net Investment Loss Without Fee Waivers ------------------------ ----------------------- 2001 2000 2001 2000 ------ ------ ------ ------ Class A Shares $0.01 $0.00* 1.53% 1.94%+ Class B Shares 0.00* 0.01 2.28 2.68+ (5) AS A RESULT OF VOLUNTARY EXPENSE LIMITATIONS, THE RATIO OF EXPENSES TO AVERAGE NET ASSETS WILL NOT EXCEED 1.50% FOR CLASS A SHARES. (6) AS A RESULT OF VOLUNTARY EXPENSE LIMITATIONS, THE RATIO OF EXPENSES TO AVERAGE NET ASSETS WILL NOT EXCEED 2.25% FOR CLASS B SHARES. * AMOUNT REPRESENTS LESS THAN $0.01 PER SHARE. ++ TOTAL RETURN IS NOT ANNUALIZED, AS IT MAY NOT BE REPRESENTATIVE OF THE TOTAL RETURN FOR THE YEAR. + ANNUALIZED. 11 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders FINANCIAL HIGHLIGHTS (CONTINUED) FOR A SHARE OF EACH CLASS OF CAPITAL STOCK OUTSTANDING THROUGHOUT EACH YEAR ENDED OCTOBER 31, UNLESS OTHERWISE NOTED: CLASS L SHARES 2003(1)(2) 2002(2) 2001 2000(3) ========================================================================================================================== NET ASSET VALUE, BEGINNING OF PERIOD $9.64 $12.56 $14.42 $11.40 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM OPERATIONS: Net investment loss(4) (0.05) (0.15) (0.18) (0.09) Net realized and unrealized gain (loss) 0.36 (2.60) (1.28) 3.11 - -------------------------------------------------------------------------------------------------------------------------- Total Income (Loss) From Operations 0.31 (2.75) (1.46) 3.02 - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS FROM: Net realized gains -- (0.17) (0.40) -- - -------------------------------------------------------------------------------------------------------------------------- Total Distributions -- (0.17) (0.40) -- - -------------------------------------------------------------------------------------------------------------------------- NET ASSET VALUE, END OF PERIOD $9.95 $ 9.64 $12.56 $14.42 - -------------------------------------------------------------------------------------------------------------------------- TOTAL RETURN 3.22%++ (22.25)% (10.51)% 26.49%++ - -------------------------------------------------------------------------------------------------------------------------- NET ASSETS, END OF PERIOD (000S) $16,076 $17,431 $26,932 $26,273 - -------------------------------------------------------------------------------------------------------------------------- RATIOS TO AVERAGE NET ASSETS: Expenses(4)(5) 2.24%+ 2.24% 2.25% 2.27%+ Net investment loss (1.06)+ (1.33) (1.37) (1.42)+ - -------------------------------------------------------------------------------------------------------------------------- PORTFOLIO TURNOVER RATE 37% 26% 34% 26% ========================================================================================================================== (1) FOR THE SIX MONTHS ENDED APRIL 30, 2003 (UNAUDITED). (2) PER SHARE AMOUNTS HAVE BEEN CALCULATED USING THE MONTHLY AVERAGE SHARES METHOD. (3) FOR THE PERIOD FROM FEBRUARY 28, 2000 (INCEPTION DATE) TO OCTOBER 31, 2000. (4) THE MANAGER WAIVED A PORTION OF ITS FEES FOR THE YEAR ENDED OCTOBER 31, 2001 AND FOR THE PERIOD ENDED OCTOBER 31, 2000. IF SUCH FEES WERE NOT WAIVED, THE PER SHARE INCREASES TO NET INVESTMENT LOSS AND THE ACTUAL EXPENSE RATIOS WOULD HAVE BEEN AS FOLLOWS: Per Share Increases to Expense Ratios Net Investment Loss Without Fee Waivers ------------------------ ----------------------- 2001 2000 2001 2000 ------ ------ ------ ------ Class L Shares $0.00* $0.01 2.28% 2.68%+ (5) AS A RESULT OF VOLUNTARY EXPENSE LIMITATIONS, THE RATIO OF EXPENSES TO AVERAGE NET ASSETS WILL NOT EXCEED 2.25% FOR CLASS L SHARES. * AMOUNT REPRESENTS LESS THAN $0.01 PER SHARE. ++ TOTAL RETURN IS NOT ANNUALIZED, AS IT MAY NOT BE REPRESENTATIVE OF THE TOTAL RETURN FOR THE YEAR. + ANNUALIZED. 12 SMITH BARNEY SECTOR SERIES INC. | 2003 Semi-Annual Report to Shareholders SMITH BARNEY HEALTH SCIENCES FUND DIRECTORS Herbert Barg Dwight B. Crane Burt N. Dorsett R. Jay Gerken, Chairman Elliot S. Jaffe Stephen E. Kaufman Joseph J. McCann Cornelius C. Rose, Jr. OFFICERS R. Jay Gerken President and Chief Executive Officer Lewis E. Daidone Senior Vice President and Chief Administrative Officer Richard L. Peteka Chief Financial Officer and Treasurer Kaprel Ozsolak Controller Christina T. Sydor Secretary INVESTMENT MANAGER Smith Barney Fund Management LLC INVESTMENT SUB-ADVISER Citi Fund Management Inc. DISTRIBUTORS Citigroup Global Markets Inc. PFS Distributors, Inc. CUSTODIAN State Street Bank and Trust Company TRANSFER AGENT Citicorp Trust Bank, fsb. 125 Broad Street, 11th Floor New York, New York 10004 SUB-TRANSFER AGENTS PFPC Global Fund Services P.O. Box 9699 Providence, Rhode Island 02940-9699 Primerica Shareholder Services P.O. Box 9662 Providence, Rhode Island 02940-9662 SMITH BARNEY HEALTH SCIENCES FUND - -------------------------------------------------------------------------------- This report is submitted for the general information of the shareholders of Smith Barney Sector Series Inc. -- Smith Barney Health Sciences Fund, but it may also be used as sales literature when preceded or accompanied by the current Prospectus, which gives details about charges, expenses, investment objectives and operating policies of the Fund. If used as sales material after July 31, 2003, this report must be accompanied by performance information for the most recently completed calendar quarter. SMITH BARNEY HEALTH SCIENCES FUND Smith Barney Mutual Funds 125 Broad Street 10th Floor, MF-2 New York, New York 10004 For complete information on any Smith Barney Mutual Funds, including management fees and expenses, call or write your financial professional for a free prospectus. Read it carefully before you invest or send money. WWW.SMITHBARNEYMUTUALFUNDS.COM (C)2003 Citigroup Global Markets Inc. Member NASD, SIPC FD02553 6/03 03-4964 ITEM 2. CODE OF ETHICS. Not applicable. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. Not applicable. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS. Not applicable. ITEM 6. [RESERVED] ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable. ITEM 8. [RESERVED] ITEM 9. CONTROLS AND PROCEDURES. (a) The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-2(c) under the Investment Company Act of 1940, as amended) are effective based on their evaluation of the disclosure controls and procedures as of a date within 90 days of the filing date of this document. (b) In the last 90 days, there have been no significant changes in the Registrant's internal controls or in other factors that could significantly affect these controls. ITEM 10. EXHIBITS. (a) Not applicable. (b) Attached hereto. Exhibit 99.CERT Certifications pursuant to section 302 of the Sarbanes-Oxley Act of 2002 Exhibit 99.906CERT Certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this Report to be signed on its behalf by the undersigned, there unto duly authorized. SMITH BARNEY SECTOR SERIES INC. By: /s/ R. Jay Gerken R. Jay Gerken Chief Executive Officer of Smith Barney Sector Series Inc. Date: Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By: /s/ R. Jay Gerken (R. Jay Gerken) Chief Executive Officer of Smith Barney Sector Series Inc. Date: By: /s/ RICHARD PETEKA Chief Financial Officer of Smith Barney Sector Series Inc. Date: