Arrowstreet Capital LP and AllianceBernstein LP: where the books meet

At Q2 2026, at least 37% of the two 13F books was the same, across 193 stocks both listed, against 0.0% at Q2 2013. Overlap is the smaller of each shared stock’s two weights, added up: the part of one book that could be swapped for the other’s without a trade.

Overlap by quarter

Only quarters both managers filed. Where either filing has more positions than are read each quarter, a stock both hold below that range is not counted, so the figure is a floor.

What the overlap is made of, Q2 2026

Stocks both listed, by the smaller of the two weights. A weight is the stock’s share of that manager’s reported book, which says how large the position is, not how strongly it is held.

Stock	Arrowstreet Capital LP	AllianceBernstein LP
Apple Inc(AAPL)	3.8%Added	3.6%Added
Microsoft Corp(MSFT)	4.6%Added	3.2%Trimmed
Nvidia Corp(NVDA)	3.1%Added	5.6%Trimmed
Amazon Com Inc(AMZN)	4.3%Added	2.6%Trimmed
Alphabet Inc(GOOG)	2.2%Trimmed	3.5%Trimmed
Broadcom Inc(AVGO)	1.4%Trimmed	2.4%Trimmed
Alphabet Inc(GOOGL)	2.4%Trimmed	1.1%Added
Kla-tencor Corp(KLAC)	0.6%Added	3.6%Added
Taiwan Semiconductor MFG LTD(TSM)	0.6%Added	0.8%Trimmed
Progressive Corp Ohio(PGR)	0.6%Added	0.6%Trimmed
TJX Cos Inc New(TJX)	0.6%Added	0.7%Trimmed
Unitedhealth Group Inc(UNH)	0.6%Trimmed	0.7%Added
Intuitive Surgical Inc(ISRG)	0.7%Added	0.6%Trimmed
Mckesson Corp(MCK)	0.5%Added	0.5%Trimmed
Stryker Corp(SYK)	0.5%Added	0.5%Trimmed
Bank Amer Corp(BAC)	0.4%Added	0.4%Added
Booking HLDGS Inc(BKNG)	0.4%Added	2.6%Added
Disney Walt Co(DIS)	0.5%Trimmed	0.4%Trimmed
Wells Fargo & Co New(WFC)	0.4%Added	0.3%Added
Asml Holding N V(ASML)	1.3%Trimmed	0.3%Trimmed

and 173 smaller ones

Moved different ways in Q2 2026

Stocks one manager started or added to while the other trimmed or sold out, between the same two quarter ends. A 13F shows the quarter ends, never when in between anything was bought or sold, or why.

Nvidia Corp(NVDA)Arrowstreet Capital LP added; AllianceBernstein LP trimmed
Microsoft Corp(MSFT)Arrowstreet Capital LP added; AllianceBernstein LP trimmed
Amazon Com Inc(AMZN)Arrowstreet Capital LP added; AllianceBernstein LP trimmed
Alphabet Inc(GOOGL)Arrowstreet Capital LP trimmed; AllianceBernstein LP added
iShares Core S&P 500 ETF(IVV)Arrowstreet Capital LP trimmed; AllianceBernstein LP added
Netflix Inc(NFLX)Arrowstreet Capital LP added; AllianceBernstein LP trimmed
Palantir Technologies Inc(PLTR)Arrowstreet Capital LP added; AllianceBernstein LP trimmed
Taiwan Semiconductor MFG LTD(TSM)Arrowstreet Capital LP added; AllianceBernstein LP trimmed
Cisco Sys Inc(CSCO)Arrowstreet Capital LP added; AllianceBernstein LP trimmed
Mastercard Incorporated(MA)Arrowstreet Capital LP added; AllianceBernstein LP trimmed
Home Depot Inc(HD)Arrowstreet Capital LP trimmed; AllianceBernstein LP added
Salesforce Com Inc(CRM)Arrowstreet Capital LP added; AllianceBernstein LP trimmed

Arrowstreet Capital LP: the record AllianceBernstein LP: the record

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