X0101 N-CEN LIVE 0001018592 XXXXXXXX 811-08403 false false false N-1A true AB INSTITUTIONAL FUNDS INC 811-08403 0001018592 549300FWYIYXMGTN1H26 ALLIANCEBERNSTEIN LP 1345 AVENUE OF THE AMERICAS NEW YORK 10105 US-NY US 212-969-1000 State Street Bank and Trust Company 1 Lincoln Street Boston 02111 617-786-3000 Custody and Accounting Records N N N-1A 1 N Marshall C. Turner, Jr. 000000000 N William H. Foulk, Jr. 002326508 N Robert M. Keith 002309907 Y Nancy P. Jacklin 000000000 N Earl D. Weiner 000000000 N Garry L. Moody 000000000 N Carol C. McMullen 000000000 N Michael J. Downey 000000000 N Vincent S. Noto 000000000 1345 Avenue of the Americas New York 10105 XXXXXX N N N N N N AllianceBernstein Investments, Inc. 8-30851 000014549 0000000000 Y N Ernst & Young LLP 42 00000000000000000000 N N N N N N AB Global Real Estate Investment Fund II S000010313 549300FWYIYXMGTN1H26 N 1 0 0 N/A N N Y N N State Street Bank and Trust Company 571474TGEMMWANRLN572 N N Revenue sharing split 241661.35000000 1234.00000000 Rule 22d-1 (17 CFR 270.22d-1) Rule 32a-4 (17 CFR 270.32a-4) Rule 12d1-1 (17 CFR 270.12d1-1) Y Y N N AllianceBernstein L.P. 801-56720 000108477 0JK55UGWSWNF3X7KLQ85 N AllianceBernstein Investor Services, Inc. 084-01187 0000000000 Y N N Refinitiv 00000000000000000000 N IHS Markit Ltd. 549300HLPTRASHS0E726 GB N Standard & Poor's Financial Services LLC 549300U4VWNITEKO2881 N PricingDirect Inc. 549300WIC0TOJ7N7GD54 N Bloomberg L.P. 549300B56MD0ZC402L06 N ICE Data Services, Inc. 5493000NQ9LYLDBCTL34 N N Citibank, National Association (Singapore, SG, Branch) E57ODZWZ7FF32TWEFA76 SG N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Skandinaviska Enskilda Banken AB F3JS33DEI6XQ4ZBPTN86 SE N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Skandinaviska Enskilda Banken AB (Oslo, Oslo, NO, Branch) F3JS33DEI6XQ4ZBPTN86 NO N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) State Street Bank and Trust Company 571474TGEMMWANRLN572 N N Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) BNP Paribas Securities Services (Athens, Attica, GR, Branch) 549300WCGB70D06XZS54 GR N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Deutsche Bank Societa per Azioni 529900SS7ZWCX82U3W60 IT N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) UniCredit Bank Austria AG D1HEB8VEU6D9M8ZUXG17 AT N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Itau CorpBanca 549300DDPTTIZ06NIV06 CL N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Banco Nacional de Mexico, S.A., Integrante del Grupo Financiero Banamex 2SFFM4FUIE05S37WFU55 MX N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Deutsche Bank Aktiengesellschaft (Madrid, Madrid, ES, Branch) 529900SICIK5OVMVY186 ES N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Mizuho Bank, Ltd. (Minato ku, Tokyo, JP, Branch) RB0PEZSDGCO3JS6CEU02 JP N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) State Street Bank and Trust Company (London, GB, Branch) 0000000000 GB N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Citibank, National Association (Sao Paulo, Sao Paulo, BR, Branch) 579100KKDGKCFFKKF005 BR N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Citibank, Anonim Sirketi CWZ8NZDH5SKY12Q4US31 TR N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) The Hongkong and Shanghai Banking Corporation Limited (Auckland, Auckland, NZ, Branch) 2HI3YI5320L3RW6NJ957 NZ N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) State Street Trust Company Canada 549300L71XG2CTQ2V827 CA N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) UniCredit Bank Hungary Zrt. 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B6ARUI4946ST4S7WOU88 IL N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Deutsche Bank Aktiengesellschaft (Amsterdam, Noord Holland, NL, Branch) 7LTWFZYICNSX8D621K86 NL N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Deutsche Bank Aktiengesellschaft (Makati City, Metro Manila, PH, Branch) 7LTWFZYICNSX8D621K86 PH N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Bank Handlowy w Warszawie Spolka Akcyjna XLEZHWWOI4HFQDGL4793 PL N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Standard Chartered Bank (Thai) Public Company Limited 549300O1LQYCQ7G1IM57 TH N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) The Hongkong and Shanghai Banking Corporation Limited (Sydney, NSW, AU, Branch) 2HI3YI5320L3RW6NJ957 AU N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) N AllianceBernstein Investor Services, Inc. 0000000000 Y N N AllianceBernstein L.P. 0JK55UGWSWNF3X7KLQ85 Y N N Sanford C. Bernstein Limited N/A 000000000 54930049G8WQ5OOUSD19 GB 0.00000000 Sanford C. Bernstein & Co., LLC 8-52942 000104474 549300I7JYZHT7D5CO04 0.00000000 Morgan Stanley & Co. LLC 8-15869 000008209 9R7GPTSO7KV3UQJZQ078 35401.86000000 Credit Suisse Securities (USA) LLC 8-422 000000816 1V8Y6QCX6YMJ2OELII46 30738.68000000 JPMorgan Chase & Co. 8-35008 000000079 8I5DZWZKVSZI1NUHU748 29042.89000000 Goldman Sachs & Co. LLC 8-129 000000361 FOR8UP27PHTHYVLBNG30 30990.78000000 Investment Technology Group, Inc. 8-44218 000029299 0000000000 17852.90000000 UBS AG N/A 000000000 BFM8T61CT2L1QCEMIK50 CH 10836.85000000 Liquidnet, Inc. 8-52461 000103987 213800HSKBBO1GCVRG79 14116.23000000 Deutsche Bank Aktiengesellschaft 8-17822 000002525 7LTWFZYICNSX8D621K86 DE 25173.11000000 Merrill Lynch, Pierce, Fenner & Smith Incorporated 8-7221 000007691 8NAV47T0Y26Q87Y0QP81 37200.04000000 Cowen and Company, LLC 8-22522 000007616 549300WR155U7DVMIW58 13976.39000000 300057.74000000 Instinet, LLC 8-23669 000007897 549300MGMN3RKMU8FT57 158003.71000000 Macquarie Capital (USA) Inc. 8-47198 000036368 549300670K07JRB5UQ40 256106.49000000 Morgan Stanley & Co. LLC 8-15869 000008209 9R7GPTSO7KV3UQJZQ078 489110.43000000 State Street Bank and Trust Company N/A 000000000 571474TGEMMWANRLN572 168022713.20000000 Deutsche Bank Aktiengesellschaft 8-17822 000002525 7LTWFZYICNSX8D621K86 DE 612445.33000000 169538379.20000000 Y 312011847.92000000 N true