$GKOS

$178.27 -$0.61 (0.34%) Close

$GKOS Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 59.0M shares outstanding

Who owns GKOS?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 55.4%

BlackRock, Inc. 16.2% · Jupiter Topco LLC 8.2%

Institutional ownership

100.0%

+1.7 pts vs last qtr

Institutional holders

364

+27 vs last qtr

Net shares bought

+2.6M

by institutions in Q2 2026

New / sold out

70 / 43

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Jupiter Topco LLC NEW +4.9M
Fuller & Thaler Asset Management, Inc. NEW +529.9K

Biggest sellers in Q2 2026

Janus Henderson Group PLC SOLD OUT −5.3M
Goldman Sachs Group Inc −477.9K

Who is planning to sell?

Notices of proposed sale, last 12 months

$69.3M

32 notices from 8 people

Shares covered

527.3K

0.89% of the company

Arranged in advance

68%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Burns Thomas William Officer 10b5-1 $31.6M
Gilliam Joseph E Officer $17.2M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+56.9%

+5.13% a year

Each share's claim on the business

−36.2%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $361M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years63% 3–5 years4% 1–3 years10% Under 1 year23%

Quarterly turnover

20.6%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting GKOS on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	9.5M	16.17%	+450.0K (+5.0%)	≤2021	0.0%
Shares held by quarter Peak holding9.5M (Q2'26) Change over 8 quarters+1.1M Share of the company16.170% BlackRock, Inc.'s full portfolio →
JH Janus Henderson Group PLC	—	—	SOLD OUT	—	0.0%
Shares held by quarter Peak holding5.3M (Q1'26) Change over 8 quarters−1.3M Janus Henderson Group PLC's full portfolio →

BlackRock, Inc.

9.5M

% of company

16.17%

Change vs last qtr

+450.0K (+5.0%)

Held since

≤2021

Janus Henderson Group PLC

—

% of company

—

Change vs last qtr

SOLD OUT

Held since

—

28 more super investors behind a free account

See every manager holding Glaukos Corporation, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting GKOS on Form N-PORT; together they hold 58.3% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IC iShares Core S&P Small-Cap ETF iShares Trust	$494M	3.5M	6.00%	0.44%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$248M	1.8M	3.01%	0.01%	June 30, 2026

iShares Core S&P Small-Cap ETF

iShares Trust

Position value

$494M

% of company

6.00%

% of the fund

0.44%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$248M

% of company

3.01%

% of the fund

0.01%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Glaukos Corporation and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
KG Kliman Gilbert H Insider	2.4M	4.03%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company4.030% Kliman Gilbert H's insider activity →
BT Burns Thomas William Insider	1.8M	3.00%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company3.000% Burns Thomas William's insider activity →

Kliman Gilbert H

Insider

2.4M

% of company

4.03%

Change vs last qtr

—

Held since

—

Burns Thomas William

Insider

1.8M

% of company

3.00%

Change vs last qtr

—

Held since

—

9 more holders behind a free account

See every insider and 5%+ holder of Glaukos Corporation.

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