Does Adage Capital Partners GP own MRK stock?

Yes. As of its Q2 2026 13F, Adage Capital Partners GP holds 2,030,023 shares of MRK (Merck), worth $260.9M.

How many shares of MRK does Adage Capital Partners GP own?

As of its Q2 2026 13F, Adage Capital Partners GP holds 2,030,023 shares of MRK (Merck).

As of its Q2 2026 13F, Adage Capital Partners GP's MRK position is worth $260.9M.

In Q2 2026, Adage Capital Partners GP reduced its MRK position by 657,416 shares (-24.5%).

Adage Capital Partners GP already held MRK in its Q4 2018 13F, the earliest on record, and has listed it in 31 quarterly 13F filings.

Position history for AGADAGE CAPITAL PARTNERS GP, L.L.C.'s holdings in MERCK & CO INC

Current Value

$260.9M

Current Shares

Total Value Change

-$150.7M

Total Shares Change

-3.4M

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Decreased	2M	-24.5%	$260.9M	0.4%	$127.75	0
2026-Q1	Decreased	2.7M	-0.0%	$323.3M	0.5%	$118.73	0
2025-Q4	Increased	2.7M	+155.1%	$282.9M	0.4%	$103.13	60
2025-Q3	Decreased	1.1M	-26.1%	$88.4M	0.1%	$81.54	0
2025-Q2	Decreased	1.4M	-29.7%	$112.8M	0.2%	$76.15	0
2025-Q1	Increased	2M	+35.5%	$181.9M	0.3%	$85.49	47
2024-Q4	Increased	1.5M	+0.2%	$148.8M	0.3%	$93.94	36
2024-Q3	Decreased	1.5M	-52.9%	$169.5M	0.3%	$106.38	0
2024-Q2	Decreased	3.2M	-6.1%	$392.6M	0.7%	$115.20	0
2024-Q1	Increased	3.4M	+78.0%	$445.4M	0.8%	$122.06	67
2023-Q4	Decreased	1.9M	-33.7%	$206.7M	0.4%	$100.21	0
2023-Q3	Decreased	2.9M	-0.0%	$294.3M	0.7%	$93.95	0
2023-Q2	Increased	2.9M	+9.9%	$329.9M	0.7%	$104.59	48
2023-Q1	Decreased	2.6M	-4.4%	$276.7M	0.6%	$95.79	0
2022-Q4	Increased	2.7M	+17.5%	$301.7M	0.7%	$99.21	51
2022-Q3	Increased	2.3M	+53.0%	$199.4M	0.5%	$76.50	51
2022-Q2	Increased	1.5M	+25.8%	$138M	0.3%	$80.34	45
2022-Q1	Decreased	1.2M	-31.7%	$98.7M	0.2%	$71.71	0
2021-Q4	Decreased	1.8M	-2.2%	$135M	0.2%	$66.39	0
2021-Q3	Increased	1.8M	+19.7%	$135.3M	0.3%	$64.46	43
2021-Q2	Decreased	1.5M	-55.1%	$117.1M	0.2%	$66.15	0
2021-Q1	Increased	3.4M	+219.5%	$258.4M	0.5%	$62.03	70
2020-Q4	Decreased	1M	-54.5%	$85.8M	0.2%	$65.25	0
2020-Q3	Increased	2.3M	+3.3%	$191.3M	0.5%	$65.65	38
2020-Q2	Decreased	2.2M	-21.0%	$172.7M	0.4%	$60.76	0
2020-Q1	Decreased	2.8M	-18.5%	$217.6M	0.6%	$59.98	0
2019-Q4	Decreased	3.5M	-5.1%	$315.7M	0.8%	$70.32	0
2019-Q3	Decreased	3.7M	-0.8%	$308M	0.8%	$64.64	0
2019-Q2	Decreased	3.7M	-13.1%	$309.2M	0.8%	$63.96	0
2019-Q1	Decreased	4.2M	-21.2%	$353M	0.9%	$63.02	0
2018-Q4	First report	5.4M	-	$411.5M	1.1%	$57.51	0