Glaukos GKOS Institutional Ownership

NYSE GKOS

$176.99 +3.56 (+2.05%)

As of: Oct 21, 2026 · 3:59 PM EDT

Institutions by Trading Activity

366 Institutions

Increased 219 59.8%

Unchanged 44 12.0%

Reduced 103 28.1%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

—

13F totals exceed reported shares outstanding

Shares Held by Institutions

60.67Mn

of 58.86Mn outstanding

▲+4.89% QoQ

Shares Outstanding

58.86Mn

Institutional Investors

366

filed 13F for Jun 2026

▲+31 vs prior quarter

Net Shares Added (QoQ)

+2.83Mn

accumulated since last quarter

Value of Holdings

$10.52Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 16, 2026

GLAUKOS Corp (NYSE:GKOS) counted 365 institutional investors among its 13F-reported shareholders for the quarter ended June 30, 2026.

Total shares held in GKOS rose 4.88% from Q1 2026; the number of holders rose 23.73% from Q2 2025.
Looking at the 365 holders of GKOS individually, 219 added to their positions, 102 reduced their stakes and 44 left their positions unchanged.
Combined, institutional investors held 60.66Mn shares of GKOS as of Q2 2026, up 2.82Mn from the prior quarter and up 424.88K from a year earlier.
As of June 30, 2026, BlackRock, Inc. held the largest stake in Glaukos with 9.54Mn shares.
Among holders that already owned Glaukos, the biggest buyers in Q2 2026 were BlackRock, Inc. (+450.19K shares), Millennium Management LLC (+407.32K shares), T. Rowe Price Associates Inc (+343.21K shares), Lord, Abbett & Co. LLC (+300.25K shares) and Marshall Wace, LLP (+280.7K shares).
Holders that trimmed the most shares of Glaukos in Q2 2026 while keeping a position were Goldman Sachs Group Inc (-477.94K shares), William Blair Investment Management, LLC (-412.14K shares), Primecap Management Co (-329.92K shares), Artisan Partners Limited Partnership (-298.2K shares) and Ameriprise Financial Inc (-295.72K shares).
Per Business Quant, the top 10 investors in GKOS for the quarter ended June 30, 2026 were BlackRock, Inc. (9.54Mn shares), Jupiter Topco LLC (4.86Mn shares), Vanguard Portfolio Management LLC (3.32Mn shares), Primecap Management Co (3.04Mn shares), Vanguard Capital Management LLC (2.55Mn shares), State Street Corp (2.32Mn shares), Millennium Management LLC (1.58Mn shares), Holocene Advisors, LP (1.51Mn shares), Geode Capital Management, LLC (1.46Mn shares) and Citadel Advisors LLC (1.39Mn shares).

Form 13F Holdings

366 Institutional Holders

Report period 30 Jun, 2026

Total shares held 60.67Mn

Of outstanding —

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	9,540,056	16.21%	▲450,188	+4.95%	$1.33Bn
2	Jupiter Topco LLC	0002146052	4,862,894	8.26%	▲4,862,894	0.00%	$679.61Mn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	3,321,839	5.64%	▲113,476	+3.54%	$464.26Mn
4	PRIMECAP MANAGEMENT CO/CA/	0000763212	3,040,705	5.17%	▼329,923	-9.79%	$424.97Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	2,551,132	4.33%	▲42,361	+1.69%	$356.55Mn
6	State Street Corp	0000093751	2,315,568	3.93%	▲132,951	+6.09%	$323.67Mn
7	MILLENNIUM MANAGEMENT LLC	0001273087	1,581,016	2.69%	▲407,320	+34.70%	$220.96Mn
8	Holocene Advisors, LP	0001700574	1,514,931	2.57%	▲131,216	+9.48%	$211.73Mn
9	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,463,448	2.49%	▲106,995	+7.89%	$204.57Mn
10	CITADEL ADVISORS LLC	0001423053	1,390,017	2.36%	▼56,909	-3.93%	$194.27Mn
11	Ameriprise Financial Inc	0000820027	1,315,057	2.23%	▼295,717	-18.36%	$183.79Mn
12	ALLIANCEBERNSTEIN L.P.	0001109448	1,254,703	2.13%	▼142,853	-10.22%	$135.08Mn
13	Capital World Investors	0001422849	1,015,943	1.73%	▲26,883	+2.72%	$141.99Mn
14	Goldman Sachs Group Inc	0000886982	897,021	1.52%	▼477,937	-34.76%	$125.37Mn
15	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	752,642	1.28%	▲38,253	+5.35%	$105.19Mn
16	Invesco Ltd.	0000914208	706,877	1.20%	▼207,311	-22.68%	$98.79Mn
17	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	679,632	1.15%	▲343,207	+102.02%	$94.99K
18	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	0001644956	661,675	1.12%	▼412,144	-38.38%	$92.48Mn
19	DRIEHAUS CAPITAL MANAGEMENT LLC	0000938206	650,571	1.11%	▲162,659	+33.34%	$90.92Mn
20	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	0000921739	647,428	1.10%	▲35,365	+5.78%	$90.49Mn

Showing 1 to 20 of 366 holders