UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2011 Check here if Amendment [ ]; Amendment Number: This Amendment (Check only one.): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: Labranche & Co Inc. Address: 33 Whitehall Street New York, NY 10004 13F File Number: 028-10499 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: Jeffrey A. McCutcheon Title: Senior Vice President and Chief Financial Officer Phone: 212-820-6220 Signature, Place, and Date of Signing: /s/ Jeffrey A. McCutcheon New York, NY April 14, 2011 Report Type (Check only one.): [ X] 13F HOLDINGS REPORT. [ ] 13F NOTICE. [ ] 13F COMBINATION REPORT. FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 2 Form 13F Information Table Entry Total: 83 Form 13F Information Table Value Total: $161,133 (thousands) List of Other Included Managers: Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional managers with respect to which this report is filed, other than the manager filing this report. No. 13F File Number Name 01 028-10500 Labranche & Co., LLC 02 028-10501 LLaBranche Capital LLC FORM 13F INFORMATION TABLE VALUE SHARES/ SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE ------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- -------- A123 SYS INC COM 03739T108 445 70085 SH DEFINED 02 0 70085 0 AFLAC INC COM 001055102 2497 47312 SH DEFINED 02 0 47312 0 ALCON INC COM SHS H01301102 817 4934 SH DEFINED 02 0 4934 0 AMERICAN EXPRESS CO COM 025816109 229 5068 SH DEFINED 02 0 5068 0 AMERICAN SUPERCONDUCTOR CORP COM 030111108 325 13076 SH DEFINED 02 0 13076 0 APPLE INC COM 037833100 3382 9706 SH DEFINED 02 0 9706 0 BEST BUY INC COM 086516101 447 15569 SH DEFINED 02 0 15569 0 BEST BUY INC COM 086516101 8 1000 SH CALL DEFINED 02 0 1000 0 BUCYRUS INTL INC NEW COM 118759109 205 2245 SH DEFINED 02 0 2245 0 CBOE HLDGS INC COM 12503M108 2656 91664 SH DEFINED 02 0 91664 0 CBOE HLDGS INC COM 12503M108 7 10 SH CALL DEFINED 02 0 10 0 CHEVRON CORP NEW COM 166764100 329 3066 SH DEFINED 02 0 3066 0 CONOCOPHILLIPS COM 20825C104 530 800 SH CALL DEFINED 02 0 800 0 CONSOL ENERGY INC COM 20854P109 201 3749 SH DEFINED 02 0 3749 0 CURRENCYSHARES EURO TR EURO SHS 23130C108 229 1619 SH DEFINED 02 0 1619 0 CURRENCYSHARES EURO TR EURO SHS 23130C108 78 1501 SH CALL DEFINED 02 0 1501 0 CURRENCYSHS JAPANESE YEN TR JAPANESE YEN 23130A102 3884 32707 SH DEFINED 02 0 32707 0 CURRENCYSHS JAPANESE YEN TR JAPANESE YEN 23130A102 238 1000 SH PUT DEFINED 02 0 1000 0 DEERE & CO COM 244199105 241 2485 SH DEFINED 02 0 2485 0 DIREXION SHS ETF TR DLY FIN BULL NEW 25459W516 212 250 SH CALL DEFINED 02 0 250 0 E TRADE FINANCIAL CORP COM NEW 269246401 625 40010 SH DEFINED 02 0 40010 0 EL PASO CORP COM 28336L109 242 577 SH CALL DEFINED 02 0 577 0 ENERSYS COM 29275Y102 271 6826 SH DEFINED 02 0 6826 0 FORD MTR CO DEL COM PAR $0.01 345370860 2701 181183 SH DEFINED 02 0 181183 0 FORD MTR CO DEL COM PAR $0.01 345370860 686 4000 SH PUT DEFINED 02 0 4000 0 GOLDCORP INC NEW COM 380956409 3329 66839 SH DEFINED 02 0 66839 0 HALLIBURTON CO COM 406216101 698 1050 SH CALL DEFINED 02 0 1050 0 INTREPID POTASH INC COM 46121Y102 281 750 SH CALL DEFINED 02 0 750 0 INTREPID POTASH INC COM 46121Y102 216 750 SH PUT DEFINED 02 0 750 0 ISHARES INC MSCI CHILE INVES 464286640 342 4755 SH DEFINED 02 0 4755 0 ISHARES INC MSCI HONG KONG 464286871 294 15530 SH DEFINED 02 0 15530 0 ISHARES INC MSCI STH AFRCA 464286780 1029 14112 SH DEFINED 02 0 14112 0 ISHARES SILVER TRUST ISHARES 46428Q109 14639 397900 SH DEFINED 02 0 397900 0 ISHARES TR BARCLYS GOVT CR 464288596 2355 21991 SH DEFINED 02 0 21991 0 ISHARES TR IBOXX INV CPBD 464287242 19163 177110 SH DEFINED 02 0 177110 0 ISHARES TR MSCI EMERG MKT 464287234 2819 57893 SH DEFINED 02 0 57893 0 ISHARES TR MSCI EMERG MKT 464287234 28 200 SH CALL DEFINED 02 0 200 0 ISHARES TR RUSSELL 2000 464287655 2799 33257 SH DEFINED 02 0 33257 0 ISHARES TR S&P SH NTL AMTFR 464288158 4817 45932 SH DEFINED 02 0 45932 0 JOY GLOBAL INC COM 481165108 252 2549 SH DEFINED 02 0 2549 0 LORILLARD INC COM 544147101 275 2894 SH DEFINED 02 0 2894 0 MAGIC SOFTWARE ENTERPRISES L ORD 559166103 340 45000 SH DEFINED 02 0 45000 0 MARATHON OIL CORP COM 565849106 375 196 SH CALL DEFINED 02 0 196 0 MARKET VECTORS ETF TR GOLD MINER ETF 57060U100 230 350 SH CALL DEFINED 02 0 350 0 MCCLATCHY CO CL A 579489105 595 175000 SH DEFINED 02 0 175000 0 MECHEL OAO SPONSORED ADR 583840103 251 8162 SH DEFINED 02 0 8162 0 MEDTRONIC INC COM 585055106 6474 164524 SH DEFINED 02 0 164524 0 MONSANTO CO NEW COM 61166W101 234 3234 SH DEFINED 02 0 3234 0 MOSAIC CO COM 61945A107 235 2990 SH DEFINED 02 0 2990 0 PEABODY ENERGY CORP COM 704549104 212 2945 SH DEFINED 02 0 2945 0 PETROHAWK ENERGY CORP COM 716495106 2121 86445 SH DEFINED 02 0 86445 0 PFIZER INC COM 717081103 720 35440 SH DEFINED 02 0 35440 0 POTASH CORP SASK INC COM 73755L107 5597 3750 SH CALL DEFINED 02 0 3750 0 POTASH CORP SASK INC COM 73755L107 482 8173 SH DEFINED 02 0 8173 0 POWERSHARES ETF TRUST LX NANOTCH PTF 73935X633 142 14754 SH DEFINED 02 0 14754 0 POWERSHARES GLOBAL ETF TRUST SOVEREIGN DEBT 73936T573 986 37325 SH DEFINED 02 0 37325 0 POWERSHARES INDIA ETF TR INDIA PORT 73935L100 330 13754 SH DEFINED 02 0 13754 0 POWERSHS DB US DOLLAR INDEX DOLL INDX BULL 73936D107 16024 735385 SH DEFINED 02 0 735385 0 POWERSHS DB US DOLLAR INDEX DOLL INDX BULL 73936D107 2404 101963 SH CALL DEFINED 02 0 101963 0 SILICON IMAGE INC COM 82705T102 1032 115000 SH DEFINED 02 0 115000 0 SPDR GOLD TRUST GOLD SHS 78463V107 470 664 SH CALL DEFINED 02 0 664 0 SPDR INDEX SHS FDS S&P RUSSIA ETF 78463X558 1114 28064 SH DEFINED 02 0 28064 0 SPDR S&P 500 ETF TR TR UNIT 78462F103 293 420 SH CALL DEFINED 02 0 420 0 SPDR S&P 500 ETF TR TR UNIT 78462F103 23314 175929 SH DEFINED 02 0 175929 0 SPDR SERIES TRUST S&P RETAIL ETF 78464A714 402 909 SH CALL DEFINED 02 0 909 0 SPDR SERIES TRUST S&P RETAIL ETF 78464A714 325 798 SH PUT DEFINED 02 0 798 0 TATA MTRS LTD SPONSORED ADR 876568502 375 1000 SH CALL DEFINED 02 0 1000 0 TATA MTRS LTD SPONSORED ADR 876568502 410 1000 SH PUT DEFINED 02 0 1000 0 TRANSOCEAN LTD REG SHS H8817H100 598 1068 SH CALL DEFINED 02 0 1068 0 TYSON FOODS INC CL A 902494103 253 13186 SH DEFINED 02 0 13186 0 UNITED STATES OIL FUND LP UNITS 91232N108 497 11671 SH DEFINED 02 0 11671 0 VALE S A ADR 91912E105 1331 39907 SH DEFINED 02 0 39907 0 VALE S A ADR 91912E105 298 1184 SH PUT DEFINED 02 0 1184 0 VANGUARD BD INDEX FD INC LONG TERM BOND 921937793 351 4483 SH DEFINED 02 0 4483 0 VANGUARD INTL EQUITY INDEX F MSCI EMR MKT ETF 922042858 6547 133824 SH DEFINED 02 0 133824 0 VANGUARD INTL EQUITY INDEX F MSCI EMR MKT ETF 922042858 49 109 SH CALL DEFINED 02 0 109 0 VANGUARD WORLD FD EXTENDED DUR 921910709 1331 16878 SH DEFINED 02 0 16878 0 WASTE MGMT INC DEL COM 94106L109 3958 105992 SH DEFINED 02 0 105992 0 WEATHERFORD INTERNATIONAL LT REG SHS H27013103 2046 2480 SH CALL DEFINED 02 0 2480 0 WELLS FARGO & CO NEW COM 949746101 247 7794 SH DEFINED 02 0 7794 0 WISDOMTREE TR EM LCL DEBT FD 97717X867 2820 54323 SH DEFINED 02 0 54323 0 WISDOMTREE TRUST EMG MKTS SMCAP 97717W281 203 3797 SH DEFINED 02 0 3797 0 WISDOMTREE TRUST INDIA ERNGS FD 97717W422 296 11942 SH DEFINED 02 0 11942 0