Who owns GKOS?
Institutional ownership of Glaukos Corporation from Form 13F, Q2 2026
366 institutional managers reported holding Glaukos Corporation (GKOS) in Form 13F filings for Q2 2026, with 60,804,214 shares worth $8.5B. The largest reported holder was BlackRock, Inc. Managers that filed both quarters added a net 3,297,898 shares (+6.3%). 66 opened new positions and 38 sold out.
- Funds holding
- 366
- Value held
- $8.5B
- New / sold out
- 66 / 38
- Net shares, same filers
- +6.3%
Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
Largest holders of GKOS
| Fund | Value | Share of 13F holdings | Shares | Move |
|---|---|---|---|---|
| BlackRock, Inc. | $1.3B | 15.7% | 9,540,056 | Added |
| Jupiter Topco LLC | $680M | 8.0% | 4,862,894 | First report |
| Vanguard Portfolio Management LLC | $464M | 5.5% | 3,321,839 | Added |
| Primecap Management Co | $425M | 5.0% | 3,040,705 | Trimmed |
| Vanguard Capital Management LLC | $357M | 4.2% | 2,551,132 | Added |
| State Street Corp | $324M | 3.8% | 2,315,568 | Added |
| Millennium Management LLC | $221M | 2.6% | 1,581,016 | Added |
| Holocene Advisors, LP | $212M | 2.5% | 1,514,931 | Added |
| Geode Capital Management, LLC | $205M | 2.4% | 1,463,448 | Added |
| Citadel Advisors LLC | $194M | 2.3% | 1,390,017 | Trimmed |
| Ameriprise Financial Inc | $184M | 2.2% | 1,315,057 | Trimmed |
| Capital World Investors | $142M | 1.7% | 1,015,943 | Added |
| Alliancebernstein L.p. | $135M | 2.1% | 1,254,703 | Trimmed |
| Goldman Sachs Group Inc | $125M | 1.5% | 897,021 | Trimmed |
| Charles Schwab Investment Management Inc | $105M | 1.2% | 752,642 | Added |
| Invesco Ltd. | $98.8M | 1.2% | 706,877 | Trimmed |
| Price T Rowe Associates Inc | $95.0M | 1.1% | 679,632 | Added |
| William Blair Investment Management, LLC | $92.5M | 1.1% | 661,675 | Trimmed |
| Driehaus Capital Management LLC | $90.9M | 1.1% | 650,571 | Added |
| Nomura Asset Management International Inc. | $90.5M | 1.1% | 647,428 | Added |
| Northern Trust Corp | $85.6M | 1.0% | 612,496 | Added |
| Braidwell LP | $82.7M | 1.0% | 591,927 | Trimmed |
| Morgan Stanley | $82.4M | 1.0% | 589,793 | Trimmed |
| Bank of America Corp | $82.1M | 1.0% | 587,327 | Trimmed |
| UBS Group AG | $80.8M | 1.0% | 578,271 | Added |
Share of 13F holdings is each fund's shares as a share of the 60,804,214 GKOS shares all 13F filers reported, not of shares outstanding.
Biggest buyers in Q2 2026
- Fuller & Thaler Asset Management, Inc. New+$74.1M
- Norges Bank New+$69.7M
- Balyasny Asset Management L.P. New+$68.7M
- BlackRock, Inc. Added+$62.9M
- Summit Partners Public Asset Management, LLC New+$62.4M
- Vaughan Nelson Investment Management, L.p. New+$58.2M
- Millennium Management LLC Added+$56.9M
- Price T Rowe Associates Inc Added+$48.0M
- Lord, Abbett & Co. LLC Added+$42.0M
- Marshall Wace, LLP Added+$39.2M
Biggest sellers in Q2 2026
- Goldman Sachs Group Inc Trimmed-$66.8M
- William Blair Investment Management, LLC Trimmed-$57.6M
- Primecap Management Co Trimmed-$46.1M
- Artisan Partners Limited Partnership Trimmed-$41.7M
- Ameriprise Financial Inc Trimmed-$41.3M
- Capital International Investors Sold out-$40.2M
- Invesco Ltd. Trimmed-$29.0M
- D. E. Shaw & Co., Inc. Trimmed-$27.1M
- Braidwell LP Trimmed-$24.0M
- PFM Health Sciences, LP Sold out-$23.2M
The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $1.2B and sold $692M; 147 added and 101 trimmed.
Schedule 13D and 13G filings on GKOS
Owners of more than 5% must file within days, so these can be newer than the 13F data.
- 2026-04-29VANGUARD CAPITAL MANAGEMENT LLC SCHEDULE 13G filed by Glaukos CorporationSchedule 13G
- 2026-02-17JANUS HENDERSON GROUP PLC SCHEDULE 13G filed by Janus Henderson Group plcSchedule 13G
- 2026-02-11PRIMECAP MANAGEMENT CO/CA/ SCHEDULE 13G filed by Glaukos CorporationSchedule 13G
- 2025-08-12WELLINGTON MANAGEMENT GROUP LLP SCHEDULE 13G filed by Glaukos CorporationSchedule 13G
Questions about GKOS ownership
- Who owns GKOS stock?
- 366 institutional investment managers reported GKOS positions in their Form 13F filings for Q2 2026, holding 60,804,214 shares worth $8.5B in total. BlackRock, Inc. reported the largest position.
- Are funds buying or selling GKOS?
- In Q2 2026, 66 managers opened new GKOS positions, 147 added, 101 trimmed and 38 sold out. Managers that filed in both quarters added a net 3,297,898 shares.
- How current is this GKOS institutional ownership data?
- It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to GKOS by CUSIP. Options are left out. GKOS news and filings · GKOS insider trades · Top funds