GKOS Glaukos Corporation
Glaukos Corporation (GKOS) Institutional Ownership
What the institutions did with GKOS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BROWN CAPITAL MANAGEMENT LLC | 151.7K | 17.8% |
| Assenagon Asset Management S.A. | 98.1K | 11.5% |
| BRAUN STACEY ASSOCIATES INC | 87.9K | 10.3% |
| ASSETMARK, INC | 76.3K | 8.9% |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM | 46.8K | 5.5% |
| Fideuram Asset Management (Ireland) dac | 27.2K | 3.2% |
| Louisiana State Employees Retirement System | 25.1K | 2.9% |
| Taylor Frigon Capital Management LLC | 21.8K | 2.6% |
| STRS OHIO | 20.5K | 2.4% |
| Y-Intercept (Hong Kong) Ltd | 19.8K | 2.3% |
| OPPENHEIMER ASSET MANAGEMENT INC. | 16.3K | 1.9% |
| YOUSIF CAPITAL MANAGEMENT, LLC | 15.7K | 1.8% |
| AMALGAMATED BANK | 15.3K | 1.8% |
| HARBOR CAPITAL ADVISORS, INC. | 13.8K | 1.6% |
| OREGON PUBLIC EMPLOYEES RETIREMENT FUND | 13.2K | 1.5% |
| OAK RIDGE INVESTMENTS LLC | 11.0K | 1.3% |
| B. Metzler seel. Sohn & Co. AG | 10.3K | 1.2% |
| EHRLICH FINANCIAL GROUP | 10.0K | 1.2% |
| State of Alaska, Department of Revenue | 10.0K | 1.2% |
| Valeo Financial Advisors, LLC | 9.7K | 1.1% |
| ProShare Advisors LLC | 7.9K | 0.9% |
| Sumitomo Mitsui Trust Group, Inc. | 7.6K | 0.9% |
| EXCHANGE TRADED CONCEPTS, LLC | 7.0K | 0.8% |
| Inspire Investing, LLC | 6.9K | 0.8% |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC | 6.7K | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Assenagon Asset Management S.A. | Reduced | 217.5K | 98.1K | -119.4K |
| BRAUN STACEY ASSOCIATES INC | Increased | 55.0K | 87.9K | +32.9K |
| Fideuram Asset Management (Ireland) dac | New | 0 | 27.2K | +27.2K |
| Y-Intercept (Hong Kong) Ltd | New | 0 | 19.8K | +19.8K |
| BROWN CAPITAL MANAGEMENT LLC | Reduced | 167.9K | 151.7K | -16.2K |
| STRS OHIO | Increased | 8.2K | 20.5K | +12.3K |
| State of Alaska, Department of Revenue | Reduced | 19.3K | 10.0K | -9.4K |
| Sumitomo Mitsui Trust Group, Inc. | New | 0 | 7.6K | +7.6K |
| Legal Advantage Investments, Inc. | New | 0 | 6.0K | +6.0K |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. | Reduced | 10.7K | 5.2K | -5.4K |
| Vise Technologies, Inc. | New | 0 | 4.1K | +4.1K |
| OPPENHEIMER ASSET MANAGEMENT INC. | Reduced | 19.6K | 16.3K | -3.2K |
| DekaBank Deutsche Girozentrale | New | 0 | 2.7K | +2.7K |
| ASSETMARK, INC | Increased | 73.6K | 76.3K | +2.6K |
| High Note Wealth, LLC | Reduced | 2.6K | 40 | -2.5K |
| FACTORY MUTUAL INSURANCE CO | New | 0 | 2.1K | +2.1K |
| Stonebridge Financial Group, LLC | Sold Out | 2.0K | 0 | -2.0K |
| PUREfi Wealth, LLC | New | 0 | 2.0K | +2.0K |
| TRUIST FINANCIAL CORP | Reduced | 3.8K | 1.9K | -1.9K |
| Axxion S.A. | Sold Out | 1.9K | 0 | -1.9K |
| Atria Investments, Inc | Increased | 3.2K | 5.1K | +1.9K |
| Virtue Capital Management, LLC | New | 0 | 1.8K | +1.8K |
| LANARK FINANCIAL, INC. | Increased | 449 | 2.2K | +1.8K |
| MOODY NATIONAL BANK TRUST DIVISION | Sold Out | 1.8K | 0 | -1.8K |
| HARBOR CAPITAL ADVISORS, INC. | Reduced | 15.5K | 13.8K | -1.7K |
| Sterling Capital Management LLC | Increased | 203 | 1.9K | +1.7K |
| Root Financial Partners, LLC | New | 0 | 1.6K | +1.6K |
| Taylor Frigon Capital Management LLC | Reduced | 23.4K | 21.8K | -1.6K |
| NISA INVESTMENT ADVISORS, LLC | Increased | 2.7K | 4.3K | +1.6K |
| GAMMA Investing LLC | Increased | 3.2K | 4.6K | +1.4K |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM | Reduced | 48.2K | 46.8K | -1.4K |
| HB Wealth Management, LLC | New | 0 | 1.4K | +1.4K |
| Avior Wealth Management, LLC | New | 0 | 1.4K | +1.4K |
| OpenArc Corporate Advisory, LLC | New | 0 | 1.3K | +1.3K |
| QUADRANT CAPITAL GROUP LLC | Reduced | 6.9K | 5.6K | -1.2K |
| Summit Global Investments | Reduced | 4.1K | 3.2K | -979 |
| Inspire Investing, LLC | Increased | 5.9K | 6.9K | +959 |
| Reyes Financial Architecture, Inc. | New | 0 | 737 | +737 |
| VIRGINIA RETIREMENT SYSTEMS ET Al | Reduced | 5.4K | 4.8K | -600 |
| Louisiana State Employees Retirement System | Reduced | 25.7K | 25.1K | -600 |
| Fifth Third Wealth Advisors LLC | Increased | 1.6K | 2.2K | +570 |
| HARBOR INVESTMENT ADVISORY, LLC | New | 0 | 530 | +530 |
| Parkside Financial Bank & Trust | Reduced | 2.2K | 1.7K | -496 |
| AMALGAMATED BANK | Reduced | 15.7K | 15.3K | -493 |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | Increased | 1.5K | 2.0K | +485 |
| PROFUND ADVISORS LLC | Reduced | 3.1K | 2.7K | -425 |
| OAK RIDGE INVESTMENTS LLC | Increased | 10.6K | 11.0K | +388 |
| ProShare Advisors LLC | Reduced | 8.2K | 7.9K | -315 |
| YOUSIF CAPITAL MANAGEMENT, LLC | Reduced | 16.0K | 15.7K | -294 |
| Provenance Wealth Advisors, LLC | New | 0 | 271 | +271 |
| IFP Advisors, Inc | Reduced | 293 | 47 | -246 |
| Valeo Financial Advisors, LLC | Reduced | 9.9K | 9.7K | -226 |
| Fortitude Family Office, LLC | New | 0 | 217 | +217 |
| Seelaus Asset Management LLC | Reduced | 2.0K | 1.8K | -211 |
| CoreCap Advisors, LLC | New | 0 | 200 | +200 |
| SteelPeak Wealth, LLC | Increased | 3.1K | 3.3K | +164 |
| Farther Finance Advisors, LLC | Increased | 543 | 681 | +138 |
| CHOREO, LLC | Increased | 3.4K | 3.5K | +136 |
| FIRST HORIZON CORP | Reduced | 227 | 98 | -129 |
| Crossmark Global Holdings, Inc. | Reduced | 4.8K | 4.6K | -125 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.