What does CUSIP 377322102 represent in this 13F holders report?

CUSIP 377322102 is the security identifier for GKOS - GLAUKOS Corp - Common Stock used to aggregate holder disclosures.

How many institutions held GKOS - GLAUKOS Corp - Common Stock in Q1 2026?

335 institutional investors reported GKOS - GLAUKOS Corp - Common Stock for Q1 2026. Use the holders table for investor-level position and value details.

GLAUKOS Corp - Common Stock (GKOS)

CUSIP: 377322102

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Common Stock
Shares outstanding: 58,134,728
Total 13F shares: 57,984,500
Share change: +720,685
Total reported value: $6,250,629,458
Put/Call ratio: 475%
Reported price per share: $107.66
Number of holders: 335
Value change: +$69,506,672
Number of buys: 151
Number of sells: 168

Security key

377322102

Report period

Q1 2026

Institutions

335

Top holders

GKOS full security history Ownership snapshot Full 13F holder table Previous quarter: Q4 2025 GLAUKOS Corp SEC filings GLAUKOS Corp company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 377322102

Previous quarter: Q4 2025

Recent filing periods:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Ownership snapshot

Top shareholders of GKOS - GLAUKOS Corp - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Lead holder

BlackRock, Inc.

13D/G signal

BlackRock, Inc.

Evidence rows

Latest as of

31 Mar 2026

13F 13D/G 3/4/5 Lead comparable stake: 14% 13D/G row: BlackRock, Inc. Showing first 8 of 50 holder rows. Open remaining rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
BlackRock, Inc.	13F 13D/G Company 13F 13D/G	14% from 13D/G	$1,034,767,984 9,164,538 shares	—	31 Dec 2025
JANUS HENDERSON GROUP PLC	13D/G 13F Company 13D/G 13F	9.2%	$622,553,178 5,348,395 shares	+$271,166,371	31 Mar 2026
PRIMECAP MANAGEMENT CO/CA/	13F 13D/G Company 13F 13D/G	5.9% from 13D/G	$381,288,942 3,376,928 shares	—	31 Dec 2025
VANGUARD PORTFOLIO MANAGEMENT LLC	13D/G Vanguard Portfolio Management 13D/G	5.6%	$350,644,529 3,256,962 shares	$0	31 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC	13D/G Vanguard Capital Management 13D/G	5.1%	$317,279,080 2,947,047 shares	$0	31 Mar 2026
FMR LLC	13D/G 13F Company 13D/G 13F	4.5%	$262,367,116 2,561,428 shares	-$360,259,421	31 Jul 2025
Thomas W. Burns	13D/G 13D/G	4.4%	$239,613,202 2,553,695 shares	$0	31 Dec 2024
WELLINGTON MANAGEMENT GROUP LLP	13D/G 13F Company 13D/G 13F	0.8%	$54,967,298 486,824 shares	-$311,358,358	31 Dec 2025

Show 42 additional holder rows in the full holder list

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Aimee S. Weisner	3/4/5 Director 3/4/5	0.08%	$5,310,846 48,311 shares	-$1,760,761	19 Feb 2026
Marc Stapley	3/4/5 Director 3/4/5	0.06%	$4,860,131 37,449 shares	-$1,915,576	22 Jan 2026
VANGUARD GROUP INC	13F Company 13F	10%	$679,773,752 6,020,492 shares	—	31 Dec 2025
STATE STREET CORP	13F Company 13F	3.7%	$239,640,410 2,122,402 shares	—	31 Dec 2025
AMERIPRISE FINANCIAL INC	13F Company 13F	3.6%	$237,595,989 2,104,294 shares	—	31 Dec 2025
ALLIANCEBERNSTEIN L.P.	13F Company 13F	2.8%	$185,561,714 1,643,448 shares	—	31 Dec 2025
MILLENNIUM MANAGEMENT LLC	13F Company 13F	2.8%	$181,751,114 1,609,699 shares	—	31 Dec 2025
GOLDMAN SACHS GROUP INC	13F Company 13F	2.3%	$152,476,487 1,350,425 shares	—	31 Dec 2025
GEODE CAPITAL MANAGEMENT, LLC	13F Company 13F	2.3%	$148,799,552 1,317,648 shares	—	31 Dec 2025
Holocene Advisors, LP	13F Company 13F	2.2%	$146,703,286 1,299,294 shares	—	31 Dec 2025
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	13F Company 13F	1.9%	$124,982,111 1,106,918 shares	—	31 Dec 2025
BRAIDWELL LP	13F Company 13F	1.6%	$104,100,649 921,979 shares	—	31 Dec 2025
UBS Group AG	13F Company 13F	1.5%	$98,676,791 873,942 shares	—	31 Dec 2025
Capital World Investors	13F Company 13F	1.5%	$96,074,329 850,893 shares	—	31 Dec 2025
Invesco Ltd.	13F Company 13F	1.3%	$88,099,946 780,267 shares	—	31 Dec 2025
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F Company 13F	1.2%	$80,620,676 714,026 shares	—	31 Dec 2025
Artisan Partners Limited Partnership	13F Company 13F	1.2%	$79,355,180 702,818 shares	—	31 Dec 2025
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	13F Company 13F	1.2%	$75,984,000 672,958 shares	—	31 Dec 2025
MORGAN STANLEY	13F Company 13F	1.2%	$75,737,821 670,778 shares	—	31 Dec 2025
NORTHERN TRUST CORP	13F Company 13F	1%	$66,292,849 587,130 shares	—	31 Dec 2025
D. E. Shaw & Co., Inc.	13F Company 13F	0.96%	$63,036,524 558,290 shares	—	31 Dec 2025
JPMORGAN CHASE & CO	13F Company 13F	0.96%	$62,832,110 556,479 shares	—	31 Dec 2025
BANK OF AMERICA CORP /DE/	13F Company 13F	0.93%	$60,822,133 538,678 shares	—	31 Dec 2025
NORGES BANK	13F Company 13F	0.92%	$60,535,906 536,143 shares	—	31 Dec 2025
RIVERBRIDGE PARTNERS LLC	13F Company 13F	0.92%	$60,425,960 535,169 shares	—	31 Dec 2025
Capital International Investors	13F Company 13F	0.88%	$57,754,594 511,510 shares	—	31 Dec 2025
AustralianSuper Pty Ltd	13F Company 13F	0.77%	$50,792,112 449,846 shares	—	31 Dec 2025
LOOMIS SAYLES & CO L P	13F Company 13F	0.77%	$50,561,663 447,805 shares	—	31 Dec 2025
Nuveen, LLC	13F Company 13F	0.7%	$45,846,654 406,046 shares	—	31 Dec 2025
Bank of New York Mellon Corp	13F Company 13F	0.61%	$40,177,936 355,840 shares	—	31 Dec 2025
Allspring Global Investments Holdings, LLC	13F Company 13F	0.61%	$39,336,491 355,279 shares	—	31 Dec 2025
Champlain Investment Partners, LLC	13F Company 13F	0.57%	$37,628,838 333,264 shares	—	31 Dec 2025
BROWN CAPITAL MANAGEMENT LLC	13F Company 13F	0.56%	$36,874,035 326,579 shares	—	31 Dec 2025
FRED ALGER MANAGEMENT, LLC	13F Company 13F	0.56%	$36,756,721 325,540 shares	—	31 Dec 2025
Integral Health Asset Management, LLC	13F Company 13F	0.56%	$36,695,750 325,000 shares	—	31 Dec 2025
EVENTIDE ASSET MANAGEMENT, LLC	13F Company 13F	0.5%	$32,662,040 289,275 shares	—	31 Dec 2025
Sofinnova Investments, Inc.	13F Company 13F	0.5%	$32,532,532 288,128 shares	—	31 Dec 2025
PRINCIPAL FINANCIAL GROUP INC	13F Company 13F	0.47%	$31,001,134 274,565 shares	—	31 Dec 2025
Bellevue Group AG	13F Company 13F	0.45%	$29,575,081 261,935 shares	—	31 Dec 2025
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F Company 13F	0.43%	$28,227,500 250,000 shares	—	31 Dec 2025
Rhenman & Partners Asset Management AB	13F Company 13F	0.36%	$23,711,100 210,000 shares	—	31 Dec 2025
C WorldWide Group Holding A/S	13F Company 13F	0.36%	$23,396,000 207,212 shares	—	31 Dec 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

335

57,984,500

Rows loaded

335

Investor	Option	Weight %	Change %	Reported value	* Price	Shares	Share Change	Activity	Report Period

* Reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. An asterisk next to the price means the price is likely invalid.

Compare Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders

331

Q1 2026 holders

335

Holder diff

Investor	Q4 2025 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q4 2025 value	Q1 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend