GKOS
Glaukos Corporation · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth -12.5% ·
share flow -9.5% ·
net new positions -14.3%
— formula
Broad distribution — falling shares and fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 125 | +9 | 42.85M | $5.95B | +15 | −5 |
| Q1 2026 | 118 | -1 | 46.55M | $5.02B | +6 | −8 |
| Q4 2025 | 118 | 0 | 48.22M | $5.44B | +2 | −1 |
| Q3 2025 | 22 | +5 | 29.69M | $2.42B | +5 | −1 |
| Q2 2025 | 15 | -2 | 32.65M | $3.37B | +1 | −3 |
| Q1 2025 | 14 | -2 | 8.81M | $867.57M | +1 | −3 |
| Q4 2024 | 16 | -1 | 9.74M | $1.46B | — | −1 |
| Q3 2024 | 16 | 0 | 7.06M | $919.99M | +1 | −1 |
| Q2 2024 | 16 | — | 6.75M | $798.69M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Wellington Management ✦ | 2.29M | +6.1% | $225.46M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 2 | Wellington Management ✦ | 2.29M | +6.1% | $225.46M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 3 | Wellington Management ✦ | 2.29M | +6.1% | $225.46M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 4 | Wellington Management ✦ | 2.29M | +6.1% | $225.46M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 5 | Wellington Management ✦ | 2.29M | +6.1% | $225.46M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 6 | State Street Global Advisors ✦ (passive) | 1.98M | -3.8% | $195.30M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 7 | PRIMECAP Management ✦ | 1.22M | +0.3% | $119.92M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 8 | Geode Capital Management ✦ (passive) | 1.22M | +1.5% | $119.62M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 9 | Geode Capital Management ✦ (passive) | 1.22M | +1.5% | $119.62M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 10 | Norges Bank ✦ (passive) | 654.93K | +16.2% | $64.46M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 11 | Capital World Investors ✦ | 550.32K | 0.0% | $54.16M | 0.0% | Held | 4 | SEC ↗ |
| 12 | Citadel Advisors ✦ | 420.50K | -64.8% | $41.39M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 13 | Citadel Advisors ✦ | 420.50K | -64.8% | $41.39M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 14 | Marshall Wace ✦ | 344.77K | New | $33.93M | 0.0% | New | 1 | SEC ↗ |
| 15 | Marshall Wace ✦ | 344.77K | New | $33.93M | 0.0% | New | 1 | SEC ↗ |
| 16 | Marshall Wace ✦ | 344.77K | New | $33.93M | 0.0% | New | 1 | SEC ↗ |
| 17 | Marshall Wace ✦ | 344.77K | New | $33.93M | 0.0% | New | 1 | SEC ↗ |
| 18 | Millennium Management ✦ | 78.23K | -80.1% | $7.70M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 19 | T. Rowe Price ✦ | 37.77K | +7.3% | $3.72M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 20 | AQR Capital Management ✦ | 7.79K | +2.6% | $766,495 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 21 | AQR Capital Management ✦ | 7.79K | +2.6% | $766,495 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 22 | AQR Capital Management ✦ | 7.79K | +2.6% | $766,495 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 23 | AQR Capital Management ✦ | 7.79K | +2.6% | $766,495 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 24 | GAMCO Investors ✦ | 7.23K | +38.8% | $711,380 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 25 | Bridgewater Associates ✦ | 2.36K | -59.5% | $231,878 | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 26 | D. E. Shaw & Co. ✦ | 2.10K | -22.2% | $206,780 | 0.0% | ▼ Trim | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Marshall Wace | $33.93M | 0.0% |
| Marshall Wace | $33.93M | 0.0% |
| Marshall Wace | $33.93M | 0.0% |
| Marshall Wace | $33.93M | 0.0% |
Exited
| Point72 Asset Management | $42.03M | was 0.1% |
| Renaissance Technologies | $7.44M | was 0.0% |
| Adage Capital Partners | $3.51M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 333 holders, 57.55M shares, $6.09B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Director · 2.50K sh · $475,000
Officer · 27.96K sh · $5.00M
Officer · 32.04K sh · $5.78M
Officer · 20.00K sh · $3.60M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology