Glaukos Ownership | Who Owns Glaukos?

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Glaukos Ownership Summary

Glaukos is owned by 107.15% institutional investors, 3.31% 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 5.92% of its assets in Glaukos shares.

GKOS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Glaukos	107.15%	3.31%	-10.47%
Sector	Healthcare Stocks	487.91%	11.08%	-398.99%
Industry	Medical Device Stocks	52.25%	10.55%	37.19%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	8.04M	15.85%	$951.27M
Blackrock funding, inc. /de	8.72M	15.33%	$901.15M
Fmr	6.11M	11.10%	$916.40M
Vanguard group	5.97M	10.86%	$895.89M
Wellington management group llp	2.16M	3.92%	$323.80M
State street	2.06M	3.75%	$309.39M
Ameriprise financial	1.93M	3.51%	$289.51M
Primecap management co/ca/	1.83M	3.21%	$188.81M
Invesco	1.46M	2.65%	$218.71M
Geode capital management	1.20M	2.18%	$179.56M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Atika capital management	319.50K	3.30%	$33.00M
Rhenman & partners asset management ab	235.00K	3.07%	$24.27M
Brown capital management	762.76K	2.56%	$62.20M
Braidwell lp	603.41K	2.13%	$62.33M
Summit partners public asset management	730.01K	2.09%	$109.46M
Taylor frigon capital management	28.78K	1.17%	$2.35M
Granite investment partners	192.58K	0.97%	$19.89M
Riverbridge partners	569.64K	0.78%	$46.45M
Gilder gagnon howe	700.63K	0.77%	$72.37M
Divisadero street capital management, lp	101.79K	0.67%	$10.51M

Top Buyers

Holder	Shares	% Assets	Change
Alliancebernstein	816.15K	0.04%	755.03K
Point72 asset management	719.26K	0.15%	719.26K
Primecap management co/ca/	1.83M	0.15%	609.52K
Norges bank	563.49K	0.01%	563.49K
William blair investment management	1.14M	0.31%	390.81K

Top Sellers

Holder	Shares	% Assets	Change
1832 asset management	-	-	-723.30K
Driehaus capital management	500.47K	0.41%	-473.15K
Fmr	6.11M	0.05%	-472.73K
Brown capital management	762.76K	2.56%	-376.36K
New york state common retirement fund	52.17K	0.01%	-335.73K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	563.49K	0.01%	563.49K	$84.49M
Capital investors	246.54K	0.00%	246.54K	$25.47M
Freestone grove partners lp	219.81K	0.17%	219.81K	$22.70M
Susquehanna portfolio strategies	132.71K	0.30%	132.71K	$13.71M
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 %
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%
Sep 30, 2024	326	10.88%	54,359,548	0.58%	98	0.87%	180	9.09%	86	7.50%
Jun 30, 2024	294	9.70%	54,047,418	5.23%	106	0.99%	165	47.32%	80	-27.27%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	3.40M	5.92%	-
Vanguard Total Stock Mkt Idx Inv	1.72M	3.00%	-36.24K
Vanguard US Total Market Shares ETF	1.66M	2.93%	135.33K
iShares Russell 2000 ETF	1.35M	2.35%	-
Vanguard Small Cap Index	1.32M	2.30%	-8.02K
American Funds SMALLCAP World A	1.10M	1.92%	547.11K
Vanguard Health Care Inv	1.02M	1.79%	-
PRIMECAP Odyssey Aggressive Growth	939.83K	1.64%	137.90K
Vanguard Explorer Inv	811.00K	1.42%	678.27K
Brown Capital Mgmt Small Co Inv	758.29K	1.38%	-197.20K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Sep 22, 2025	Navratil Tomas	CHIEF DEVELOPMENT OFFICER	Sell	$23.38K
Sep 22, 2025	Navratil Tomas	CHIEF DEVELOPMENT OFFICER	Sell	$1.90K
Sep 22, 2025	Navratil Tomas	CHIEF DEVELOPMENT OFFICER	Sell	$18.26K
Sep 11, 2025	Navratil Tomas	CHIEF DEVELOPMENT OFFICER	Sell	$172.61K
Sep 11, 2025	Navratil Tomas	CHIEF DEVELOPMENT OFFICER	Sell	$281.01K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	-	5
2025 Q2	-	-
2025 Q1	-	5
2024 Q4	-	5
2024 Q3	-	10

GKOS Ownership FAQ

Who Owns Glaukos?

Glaukos shareholders are primarily institutional investors at 107.15%, followed by 3.31% insiders and -10.46% retail investors. The average institutional ownership in Glaukos's industry, Medical Device Stocks, is 52.25%, 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 (8.72M shares, 15.33%), and Fmr (6.11M shares, 11.10%). Together, they hold 42.28% 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?

Atika capital management is Glaukos’s biggest shareholder by percentage of total assets invested, with 3.30% of its assets in 319.5K Glaukos shares, valued at 33M$.

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 5.92% of its total shares outstanding invested in 3.4M Glaukos shares.

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