ADAGE CAPITAL PARTNERS GP, L.L.C.

Position in GKOS — GLAUKOS Corp

CIK 1165408 Boston, MA

Position in GKOS

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$8,814,985

-$19,412,515 QoQ

Shares Held

81,878

-67.2% QoQ

Ownership

0.139%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2020

14 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Healthcare · as of Mar 31, 2026

ADAGE CAPITAL PARTNERS GP, L.L.C. holds $794,156,024 across 13 Medical Devices names. GKOS ranks #9 (1.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BSX	Boston Scientific Corp	4,633,237	$290,735,621
2	ABT	Abbott Laboratories	1,707,764	$175,336,129
3	DXCM	Dexcom Inc	1,666,408	$104,650,422
4	MDT	Medtronic plc	989,189	$85,713,226
5	PEN	Penumbra Inc	135,000	$44,329,950
6	EW	Edwards Lifesciences Corp	501,866	$40,189,429
7	STE	STERIS plc	87,486	$19,345,779
8	CBLL	Ceribell, Inc.	756,751	$13,871,245

14 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$8,814,985	81,878	-67.2%	Shares	Sole	2026-05-15
2025-12-31	$28,227,500	250,000	+774.7%	Shares	Sole	2026-02-17
2025-09-30	$2,330,862	28,582	+22.2%	Shares	Sole	2025-11-14
2024-12-31	$3,508,296	23,398	-86.5%	Shares	Sole	2025-02-14
2024-09-30	$22,590,291	173,398	-13.3%	Shares	Sole	2024-11-14
2024-06-30	$23,670,000	200,000	0.0%	Shares	Sole	2024-08-14
2024-03-31	$18,858,000	200,000	0.0%	Shares	Sole	2024-05-15
2023-12-31	$15,898,000	200,000	-55.6%	Shares	Sole	2024-02-14
2023-09-30	$33,862,500	450,000	-30.8%	Shares	Sole	2023-11-14
2023-06-30	$46,286,500	650,000	+76.6%	Shares	Other	2023-08-14
2023-03-31	$18,441,810	368,100	+94.7%	Shares	Sole	2023-05-15
2022-12-31	$8,259,888	189,100	-42.2%	Shares	Sole	2023-02-14
2022-09-30	$17,409,480	327,000	+86.9%	Shares	Sole	2022-11-14
2020-09-30	$8,666,000	175,000	—	Shares	Sole	2020-11-16
No filing history on record for this holder in this stock.