Boston Partners

SEC CIK: 0001386060
Latest filing: Aug 4, 2026

SEC filings (opens in a new tab)

COST holding history

Costco Wholesale Corp in every 13F filed by Boston Partners, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

COST overview All 13F holders of COST Full Q2 2026 holdings

Shares (Q2 2026): 367
Value: $343.3K
% of portfolio: <0.1%
Quarters held: 4; Since Q3 2025

Holdings of COST by Boston Partners, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	367	$343.3K	<0.1%	−3−0.8%	Reduced	Holders
Q1 2026	370	$368.8K	<0.1%	+60+19.4%	Added	Holders
Q4 2025	310	$267.3K	<0.1%	+5+1.6%	Added	Holders
Q3 2025	305	$282.3K	<0.1%	+305	New	Holders