Question 1

How many shares of COST does ADAGE CAPITAL PARTNERS GP, L.L.C. own?

Accepted Answer

As of 2026-Q1, ADAGE CAPITAL PARTNERS GP, L.L.C. holds 397,677 shares of COST (COSTCO WHOLESALE CORPORATION).

Question 2

What is ADAGE CAPITAL PARTNERS GP, L.L.C.'s COST position worth?

Accepted Answer

As of 2026-Q1, ADAGE CAPITAL PARTNERS GP, L.L.C.'s COST position is worth $396.3M.

Question 3

Is ADAGE CAPITAL PARTNERS GP, L.L.C. buying or selling COST?

Accepted Answer

In 2026-Q1, ADAGE CAPITAL PARTNERS GP, L.L.C. increased their COST position (+2.1% change in shares).

Question 4

When did ADAGE CAPITAL PARTNERS GP, L.L.C. first buy COST?

Accepted Answer

Based on available 13F filings, ADAGE CAPITAL PARTNERS GP, L.L.C. first reported a position in COST in 2024-Q2. They have held the position across 30 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q1 Latest	Increased	397,677	+2.1%	$396.3M	0.6%	$1,007.77	45
2025-Q4	Decreased	389,577	-0.2%	$335.9M	0.5%	$864.47	0
2025-Q3	Increased	390,277	+12.2%	$361.3M	0.6%	$914.33	49
2025-Q2	Decreased	347,877	-9.0%	$344.4M	0.6%	$981.05	0
2025-Q1	Decreased	382,277	-1.3%	$361.5M	0.7%	$924.59	0
2024-Q4	Increased	387,195	+3.2%	$354.8M	0.6%	$916.17	45
2024-Q3	Increased	375,198	+3.8%	$332.6M	0.6%	$878.65	45
2024-Q2	Increased	361,627	+67.7%	$307.4M	0.6%	$842.10	64

COSTShowing 8 of 30 quarters

COST
Showing 8 of 30 quarters