Glaukos Ownership | Who Owns Glaukos?

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Glaukos Ownership Summary

Glaukos is owned by 54.66% institutional investors, 3.47% insiders, and 41.86% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 16.05% of GKOS shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.99% of its assets in Glaukos shares.

GKOS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Glaukos	54.66%	3.47%	41.86%
Sector	Healthcare Stocks	232.64%	10.66%	-143.30%
Industry	Medical Device Stocks	37.54%	10.61%	51.85%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	9.16M	16.05%	$1.03B
Blackrock	8.04M	15.85%	$951.27M
Vanguard group	6.02M	10.55%	$679.77M
Wellington management group llp	3.58M	6.29%	$292.00M
Primecap management co/ca/	3.38M	5.92%	$381.29M
State street	2.12M	3.72%	$239.64B
Ameriprise financial	1.90M	3.34%	$154.97B
Alliancebernstein	1.73M	3.05%	$141.36M
Goldman sachs group	1.35M	2.37%	$152.48M
Geode capital management	1.32M	2.31%	$148.80M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Iron triangle partners lp	342.80K	3.98%	$27.96M
Brown capital management	762.76K	2.56%	$62.20M
Rhenman & partners asset management ab	210.00K	2.22%	$23.71M
Summit partners public asset management	730.01K	2.09%	$109.46M
Braidwell lp	780.16K	1.89%	$63.62M
Capricorn fund managers	60.00K	1.63%	$6.77M
Taylor frigon capital management	28.43K	1.62%	$3.21M
Sofinnova investments	312.99K	1.40%	$25.52M
Exome asset management	27.14K	1.34%	$2.21M
Riverbridge partners	535.17K	1.13%	$60.43M

Top Buyers

Holder	Shares	% Assets	Change
Primecap management co/ca/	3.38M	0.29%	1.12M
Goldman sachs group	1.35M	0.02%	913.46K
Ubs group	873.94K	0.02%	663.85K
Norges bank	536.14K	0.01%	536.14K
Blackrock funding, inc. /de	9.16M	0.02%	508.74K

Top Sellers

Holder	Shares	% Assets	Change
Fmr	121.41K	0.00%	-6.22M
Westfield capital management co lp	-	-	-1.23M
1832 asset management	-	-	-723.30K
Macquarie group	-	-	-600.23K
Driehaus capital management	-	-	-500.47K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	536.14K	0.01%	536.14K	$60.54M
T. rowe price investment management	395.65K	0.02%	395.65K	$32.27M
Sofinnova investments	312.99K	1.40%	312.99K	$25.52M
Cubist systematic strategies	94.90K	0.04%	94.90K	$7.74M
Eagle asset management	89.43K	0.06%	89.43K	$10.50M

Sold Out

Holder	Change
Natixis	-1.00
Tfc financial management	-1.00
Bryn mawr trust	-1.00
National bank of canada /fi/	-2.00
True wealth design	-2.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	177	-45.54%	31,204,201	-44.20%	54	0.57%	102	-37.80%	48	-58.97%
Sep 30, 2025	162	-47.57%	28,643,529	-53.09%	50	0.44%	73	-60.54%	68	-21.84%
Jun 30, 2025	307	-8.36%	60,994,218	7.14%	107	1.06%	183	7.02%	87	-22.32%
Mar 31, 2025	16	-95.27%	2,565,025	-95.51%	4	0.04%	11	-93.57%	1	-99.07%
Dec 31, 2024	188	-42.68%	29,346,043	-46.02%	53	0.55%	100	-45.05%	59	-31.40%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	3.48M	5.99%	212.78K
Vanguard Total Stock Mkt Idx Inv	1.72M	2.97%	4.06K
Vanguard US Total Market Shares ETF	1.66M	2.93%	135.33K
Vanguard Capital Opportunity Inv	1.70M	2.92%	739.07K
American Funds SMALLCAP World A	1.36M	2.35%	-
iShares Russell 2000 ETF	1.35M	2.32%	354.63K
Vanguard Small Cap Index	1.24M	2.13%	-201.00
PRIMECAP Odyssey Aggressive Growth	1.11M	1.92%	136.71K
Janus Henderson US SMID Cap Growth	1.09M	1.88%	499.02K
Janus Henderson Triton D	1.09M	1.88%	-26.35K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Mar 24, 2026	Thurman Alex R.	SVP & CHIEF FINANCIAL OFFICER	Sell	$160.07K
Mar 16, 2026	Navratil Tomas	CHIEF DEVELOPMENT OFFICER	Sell	$26.94K
Mar 16, 2026	Navratil Tomas	CHIEF DEVELOPMENT OFFICER	Sell	$29.36K
Mar 16, 2026	Navratil Tomas	CHIEF DEVELOPMENT OFFICER	Sell	$44.77K
Mar 17, 2026	Thurman Alex R.	SVP & CHIEF FINANCIAL OFFICER	Sell	$61.97K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	20
2025 Q4	-	3
2025 Q3	-	5
2025 Q2	-	-
2025 Q1	-	5

GKOS Ownership FAQ

Who Owns Glaukos?

Glaukos shareholders are primarily institutional investors at 54.66%, followed by 3.47% insiders and 41.87% retail investors. The average institutional ownership in Glaukos's industry, Medical Device Stocks, is 37.54%, which Glaukos exceeds.

Who owns the most shares of Glaukos?

Glaukos’s largest shareholders are Blackrock funding, inc. /de (9.16M shares, 16.05%), Blackrock (8.04M shares, 15.85%), and Vanguard group (6.02M shares, 10.55%). Together, they hold 42.45% of Glaukos’s total shares outstanding.

Does Blackrock own Glaukos?

Yes, BlackRock owns 15.85% of Glaukos, totaling 8.04M shares as of Jun 2024. This represents 0.02% of BlackRock's total assets, with a market value of 951.27M$. In the last quarter, BlackRock increased its holdings by 140.78K shares, a 1.78% change.

Who is Glaukos’s biggest shareholder by percentage of total assets invested?

Iron triangle partners lp is Glaukos’s biggest shareholder by percentage of total assets invested, with 3.98% of its assets in 342.8K Glaukos shares, valued at 27.96M$.

Who is the top mutual fund holder of Glaukos shares?

iShares Core S&P Small-Cap ETF is the top mutual fund holder of Glaukos shares, with 5.99% of its total shares outstanding invested in 3.48M Glaukos shares.

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