GKOS
Glaukos Corporation · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth +29.4% ·
share flow -13.0% ·
net new positions +18.2%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 125 | +9 | 42.84M | $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 | BlackRock ✦ (passive) | 8.66M | -0.8% | $705.88M | 0.0% | ▼ Trim | 2 | SEC ↗ ×15 |
| 2 | The Vanguard Group ✦ (passive) | 6.05M | -1.1% | $493.09M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 3 | Wellington Management ✦ | 3.58M | +10.4% | $292.00M | 0.1% | ▲ Add | 6 | SEC ↗ ×5 |
| 4 | PRIMECAP Management ✦ | 2.25M | +23.3% | $183.80M | 0.1% | ▲ Add | 6 | SEC ↗ |
| 5 | State Street Global Advisors ✦ (passive) | 2.10M | +0.7% | $171.61M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 6 | JPMorgan Chase ✦ | 1.34M | — | $109.29M | 0.0% | n/c | 1 | SEC ↗ ×14 |
| 7 | Geode Capital Management ✦ (passive) | 1.32M | -1.1% | $107.34M | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
| 8 | Millennium Management ✦ | 913.41K | New | $74.49M | 0.1% | New | 1 | SEC ↗ |
| 9 | Capital World Investors ✦ | 850.89K | 0.0% | $69.39M | 0.0% | Held | 6 | SEC ↗ |
| 10 | Point72 Asset Management ✦ | 690.72K | -4.0% | $56.33M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 11 | Goldman Sachs Group ✦ | 436.97K | — | $35.63M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 12 | Morgan Stanley ✦ | 429.58K | — | $35.03M | 0.0% | n/c | 1 | SEC ↗ ×11 |
| 13 | Marshall Wace ✦ | 324.53K | +40.7% | $26.47M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 14 | D. E. Shaw & Co. ✦ | 278.44K | New | $22.71M | 0.0% | New | 1 | SEC ↗ |
| 15 | Fidelity (FMR) ✦ | 121.41K | -98.1% | $9.90M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 16 | T. Rowe Price ✦ | 116.91K | +8.7% | $9.53M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 17 | Two Sigma Investments ✦ | 66.94K | New | $5.46M | 0.0% | New | 1 | SEC ↗ |
| 18 | Renaissance Technologies ✦ | 57.89K | New | $4.72M | 0.0% | New | 1 | SEC ↗ |
| 19 | Citadel Advisors ✦ | 55.94K | -82.5% | $4.56M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 20 | Adage Capital Partners ✦ | 28.58K | New | $2.33M | 0.0% | New | 1 | SEC ↗ |
| 21 | AQR Capital Management ✦ | 10.32K | +62.7% | $841,343 | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 22 | GAMCO Investors ✦ | 8.10K | +1.2% | $660,555 | 0.0% | ▲ Add | 6 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Millennium Management | $74.49M | 0.1% |
| D. E. Shaw & Co. | $22.71M | 0.0% |
| Two Sigma Investments | $5.46M | 0.0% |
| Renaissance Technologies | $4.72M | 0.0% |
| Adage Capital Partners | $2.33M | 0.0% |
Exited
| Norges Bank | $76.31M | 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)
Officer · 888 sh · $145,570
Officer · 312 sh · $51,667
Officer · 327 sh · $53,883
Officer · 167 sh · $25,334
Officer · 1.08K sh · $167,735
Officer · 229 sh · $35,321
Officer · 136 sh · $20,769
Officer · 103 sh · $16,810
Officer · 345 sh · $56,787
Officer · 191 sh · $31,744
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology