GKOS Institutional Ownership
Who owns GLAUKOS Corp and what the big funds did with it last quarter, from every SEC 13F filing. 368 funds reported holding GKOS at Jun 30, 2026, together owning 102.7% of the company.
- ▲214 buying vs 140 selling
- ▲Held by funds +4.8 pts
- ▲Funds holding +30
- ▲Superinvestors: 4 added, 1 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 368 | 338 | +8.9% |
| In funds' top 10 | 2 | 3 | −33.3% |
| 13F shares | 60.8M | 58M | +4.9% |
| Held by funds | 102.7% | 98.0% | +4.8 pts |
| New positions | 67 | 42 | +59.5% |
| Increased | 147 | 106 | +38.7% |
| Reduced | 102 | 130 | −21.5% |
| Sold out | 38 | 41 | −7.3% |
| Calls (shares) | 17K | 70K | −75.0% |
| Puts (shares) | 37K | 3,300 | +1018.2% |
| Put/call ratio | 2.12 | 0.05 | +4372.7% |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in GKOS
All superinvestors →
Who owns GKOS
share of fund held shares- Index and passive funds36.3%
- Active managers and hedge funds50.2%
- Banks and brokers11.2%
- Pensions, insurers and other2.3%
The top 10 holders own 51.9% of all GKOS shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
105 funds changed their position- Assenagon Asset Management S.A.Trimmed−119K sh
- Principal Financial Group IncTrimmed−41K sh
- Braun Stacey Associates IncAdded+33K sh
- Fideuram Asset Management (Ireland) dacNew+27K sh
- TimesSquare Capital Management, LLCAdded+22K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 16.12% | 9.5M | $1.3B | +450K |
| 2 | Jupiter Topco LLC | 8.21% | 4.9M | $680M | – |
| 3 | Vanguard Portfolio Management LLC | 5.61% | 3.3M | $464M | +113K |
| 4 | Primecap Management Co/ca/ | 5.14% | 3M | $425M | −330K |
| 5 | Vanguard Capital Management LLC | 4.31% | 2.6M | $357M | +42K |
| 6 | State Street Corp | 3.91% | 2.3M | $324M | +133K |
| 7 | Millennium Management LLC | 2.67% | 1.6M | $221M | +407K |
| 8 | Holocene Advisors, LP | 2.56% | 1.5M | $212M | +131K |
| 9 | Geode Capital Management, LLC | 2.47% | 1.5M | $205M | +107K |
| 10 | Citadel Advisors LLC | 2.35% | 1.4M | $194M | −57K |
- Fuller & Thaler Asset Management, Inc.+530K sh+$74.1M
- Norges Bank+499K sh+$69.7M
- Balyasny Asset Management L.P.+492K sh+$68.7M
- BlackRock, Inc.+450K sh+$62.9M
- Summit Partners Public Asset Management, LLC+447K sh+$62.4M
- Vaughan Nelson Investment Management, L.P.+416K sh+$58.2M
- Millennium Management LLC+407K sh+$56.9M
- Price T Rowe Associates Inc /md/+343K sh+$48M
- Goldman Sachs Group Inc−478K sh−$66.8M
- William Blair Investment Management, LLC−412K sh−$57.6M
- Primecap Management Co/ca/−330K sh−$46.1M
- Artisan Partners Limited Partnership−298K sh−$41.7M
- Ameriprise Financial Inc−296K sh−$41.3M
- Capital International Investors−373K sh−$40.2M
- Invesco Ltd.−207K sh−$29M
- D. E. Shaw & Co., Inc.−194K sh−$27.1M
GKOS institutional ownership FAQ
Who owns the most GKOS stock?
In Q2 2026 13F filings the largest holder of GKOS was BlackRock, Inc., followed by Jupiter Topco LLC and Vanguard Portfolio Management LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of GKOS is owned by institutions?
Funds that file 13F reports held 102.7% of GKOS's shares at Jun 30, 2026, compared with 98.0% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying GKOS?
In Q2 2026, 214 funds bought GKOS (67 of them new positions) and 140 sold (38 sold out completely). Among well known investors, 4 added and 1 cut. Our fund sentiment for GKOS is strongly bullish.
What is GKOS's institutional put/call ratio?
Funds reported $5.2M of GKOS puts against $2.4M of calls, a put/call ratio of 2.12 (0.05 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this GKOS ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.