Quantbot Technologies LP and Arrowstreet Capital LP: where the books meet

At Q2 2026, at least 21% of the two 13F books was the same, across 184 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	Quantbot Technologies LP	Arrowstreet Capital LP
Microsoft Corp(MSFT)	0.8%Trimmed	4.6%Added
Amazon.com Inc(AMZN)	0.6%Added	4.3%Added
Mckesson Corp(MCK)	0.6%Added	0.5%Added
Suncor Energy Inc(SU)	0.5%New	0.6%Added
TJX Companies Inc(TJX)	0.5%Trimmed	0.6%Added
Boston Scientific Corp(BSX)	0.4%Added	0.4%Added
Intuit Inc(INTU)	0.4%New	0.5%Added
Wells Fargo Co(WFC)	0.7%Added	0.4%Added
Oreilly Automotive Inc(ORLY)	0.6%Added	0.3%Added
T-mobile US Inc(TMUS)	0.3%New	0.4%Added
Chipotle Mexican Grill Inc(CMG)	0.4%Trimmed	0.3%Added
Marsh Mclennan Cos(MRSH)	0.4%New	0.3%Added
UBS Group AG(UBS)	0.3%New	0.4%Trimmed
Hilton Worldwide Holdings In(HLT)	0.7%Added	0.3%Trimmed
Intuitive Surgical Inc(ISRG)	0.3%New	0.7%Added
Canadian Natural Resources(CNQ)	0.4%New	0.3%Trimmed
At T Inc(T)	0.3%New	0.3%Added
McDonald's Corp(MCD)	0.3%Added	0.5%Added
American Tower Corp(AMT)	0.2%Trimmed	0.3%Added
Nokia Corp(NOK)	0.2%Added	0.2%Trimmed

and 164 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.

Microsoft Corp(MSFT)Quantbot Technologies LP trimmed; Arrowstreet Capital LP added
Apple Inc(AAPL)Quantbot Technologies LP trimmed; Arrowstreet Capital LP added
Nvidia Corp(NVDA)Quantbot Technologies LP trimmed; Arrowstreet Capital LP added
Alphabet Inc-cl A(GOOGL)Quantbot Technologies LP started; Arrowstreet Capital LP trimmed
Lam Research Corp(LRCX)Quantbot Technologies LP started; Arrowstreet Capital LP trimmed
Alphabet Inc(GOOG)Quantbot Technologies LP started; Arrowstreet Capital LP trimmed
Fortinet Inc(FTNT)Quantbot Technologies LP trimmed; Arrowstreet Capital LP added
TJX Companies Inc(TJX)Quantbot Technologies LP trimmed; Arrowstreet Capital LP added
Barrick Mining Corp(B)Quantbot Technologies LP started; Arrowstreet Capital LP trimmed
Abbott Laboratories(ABT)Quantbot Technologies LP trimmed; Arrowstreet Capital LP added
Bank of America Corp(BAC)Quantbot Technologies LP trimmed; Arrowstreet Capital LP added
UBS Group AG(UBS)Quantbot Technologies LP started; Arrowstreet Capital LP trimmed

Quantbot Technologies LP: the record Arrowstreet Capital LP: the record

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