Glaukos Ownership | Who Owns Glaukos?

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Glaukos Ownership Summary

Glaukos is owned by 50.32% institutional investors, 3.32% insiders, and 46.36% retail investors. 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	50.32%	3.32%	46.36%
Sector	Healthcare Stocks	42.64%	10.86%	46.50%
Industry	Medical Device Stocks	37.80%	10.13%	52.07%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	8.04M	15.85%	$951.27M
Blackrock funding, inc. /de	8.66M	15.21%	$705.88M
Vanguard group	6.02M	10.55%	$679.77M
Wellington management group llp	3.58M	6.29%	$292.00M
Primecap management co/ca/	2.25M	3.96%	$183.80M
State street	2.10M	3.70%	$171.61M
Ameriprise financial	1.90M	3.34%	$154.97B
Alliancebernstein	1.73M	3.05%	$141.36M
Geode capital management	1.32M	2.31%	$107.34M
Westfield capital management co lp	1.23M	2.16%	$100.44M

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
Summit partners public asset management	730.01K	2.09%	$109.46M
Rhenman & partners asset management ab	230.00K	2.08%	$18.76B
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
Atika capital management	212.40K	1.39%	$17.32M
Exome asset management	27.14K	1.34%	$2.21M

Top Buyers

Holder	Shares	% Assets	Change
Ubs group	873.94K	0.02%	663.85K
Norges bank	563.49K	0.01%	563.49K
Macquarie group	600.23K	0.06%	526.39K
Alliancebernstein	1.73M	0.04%	481.62K
Primecap management co/ca/	2.25M	0.14%	425.79K

Top Sellers

Holder	Shares	% Assets	Change
Fmr	121.41K	0.00%	-6.22M
1832 asset management	-	-	-723.30K
Driehaus capital management	-	-	-500.47K
Holocene advisors, lp	547.05K	0.10%	-498.83K
Invesco	607.44K	0.01%	-389.65K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	563.49K	0.01%	563.49K	$84.49M
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 %
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%
Sep 30, 2024	326	10.88%	54,359,548	0.58%	98	0.87%	180	9.09%	86	7.50%

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
Jan 22, 2026	Stapley Marc	-	Sell	$213.75K
Jan 22, 2026	Stapley Marc	-	Sell	$558.40K
Jan 22, 2026	Stapley Marc	-	Sell	$494.13K
Jan 22, 2026	Stapley Marc	-	Sell	$480.58K
Jan 22, 2026	Stapley Marc	-	Sell	$168.71K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	2
2025 Q4	-	3
2025 Q3	-	5
2025 Q2	-	-
2025 Q1	-	5

GKOS Ownership FAQ

Who Owns Glaukos?

Glaukos shareholders are primarily institutional investors at 50.32%, followed by 3.32% insiders and 46.36% retail investors. The average institutional ownership in Glaukos's industry, Medical Device Stocks, is 37.80%, 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 (8.66M shares, 15.21%), and Vanguard group (6.02M shares, 10.55%). Together, they hold 41.60% 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 5.92% of its total shares outstanding invested in 3.4M Glaukos shares.

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