Glaukos Ownership | Who Owns Glaukos?

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Glaukos Ownership Summary

Glaukos is owned by 99.33% institutional investors, 3.59% insiders. Blackrock is the largest institutional shareholder, holding 15.85% of GKOS shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.96% of its assets in Glaukos shares.

GKOS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Glaukos	99.33%	3.59%	-2.92%
Sector	Healthcare Stocks	35.34%	11.88%	52.77%
Industry	Medical Device Stocks	35.88%	10.92%	53.20%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	8.04M	15.85%	$951.27M
Blackrock funding, inc. /de	9.09M	15.81%	$978.63M
Vanguard group	6.02M	10.55%	$679.77M
Janus henderson group	5.35M	9.30%	$575.84M
Primecap management co/ca/	3.37M	5.86%	$362.88M
State street	2.18M	3.80%	$234.98M
Ameriprise financial	1.61M	2.80%	$173.42M
Citadel advisors	1.45M	2.52%	$155.78M
Alliancebernstein	1.40M	2.43%	$157.80M
Holocene advisors, lp	1.38M	2.41%	$148.97M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Iron triangle partners lp	342.80K	3.98%	$27.96M
Brown capital management	230.03K	3.52%	$24.76M
Braidwell lp	763.50K	2.74%	$82.20M
Pfm health sciences, lp	215.69K	2.12%	$23.22M
Summit partners public asset management	730.01K	2.09%	$109.46M
Taylor frigon capital management	23.45K	1.44%	$2.52M
Exome asset management	20.87K	1.16%	$2.25M
Riverbridge partners	433.23K	1.14%	$46.64M
Rhenman & partners asset management ab	84.00K	1.12%	$9.04M
Integral health asset management	175.00K	0.90%	$18.84M

Top Buyers

Holder	Shares	% Assets	Change
Janus henderson group	5.35M	0.29%	2.33M
Citadel advisors	1.45M	0.03%	1.42M
Norges bank	536.14K	0.01%	536.14K
Driehaus capital management	487.91K	0.39%	487.91K
Jennison associates	487.02K	0.04%	487.02K

Top Sellers

Holder	Shares	% Assets	Change
1832 asset management	-	-	-723.30K
Macquarie group	-	-	-600.23K
Ameriprise financial	1.61M	0.04%	-493.52K
Ubs group	386.40K	0.01%	-487.54K
Millennium management	1.17M	0.05%	-436.00K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	536.14K	0.01%	536.14K	$60.54M
Driehaus capital management	487.91K	0.39%	487.91K	$52.53M
Jennison associates	487.02K	0.04%	487.02K	$52.43M
Vanguard fiduciary trust	396.72K	0.01%	396.72K	$42.71M
Exoduspoint capital management, lp	179.73K	0.16%	179.73K	$19.35M

Sold Out

Holder	Change
Dunhill financial	-1.00
Bryn mawr trust	-1.00
Natixis	-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 %
Mar 31, 2026	340	-	57,121,191	0.08%	99	1.00%	157	-20.71%	129	25.24%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	3.50M	5.96%	732.00
Vanguard Total Stock Mkt Idx Inv	1.77M	3.07%	40.03K
Vanguard US Total Market Shares ETF	1.66M	2.93%	135.33K
Vanguard Capital Opportunity Inv	1.70M	2.91%	3.20K
American Funds SMALLCAP World A	1.36M	2.37%	-
iShares Russell 2000 ETF	1.32M	2.24%	11.09K
Vanguard Small Cap Index	1.27M	2.22%	34.66K
PRIMECAP Odyssey Aggressive Growth	1.10M	1.88%	-9.50K
Janus Henderson Triton D	1.04M	1.79%	-49.28K
Vanguard Health Care Inv	1.02M	1.79%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 14, 2026	Kliman Gilbert H	-	Sell	$703.80K
May 11, 2026	Kliman Gilbert H	-	Sell	$675.00K
Apr 30, 2026	Thurman Alex R.	SVP & CHIEF FINANCIAL OFFICER	Sell	$1.40M
May 01, 2026	Gilliam Joseph E	PRESIDENT & COO	Sell	$2.81M
May 01, 2026	WEN LEANA	-	Sell	$243.69K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	8
2026 Q1	-	21
2025 Q4	-	3
2025 Q3	-	5
2025 Q2	-	-

GKOS Ownership FAQ

Who Owns Glaukos?

Glaukos shareholders are primarily institutional investors at 99.33%, followed by 3.59% insiders and -2.92% retail investors. The average institutional ownership in Glaukos's industry, Medical Device Stocks, is 35.88%, which Glaukos exceeds.

Who owns the most shares of Glaukos?

Glaukos’s largest shareholders are Blackrock (8.04M shares, 15.85%), Blackrock funding, inc. /de (9.09M shares, 15.81%), and Vanguard group (6.02M shares, 10.55%). Together, they hold 42.20% 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 5.96% of its total shares outstanding invested in 3.5M Glaukos shares.

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