FIX
Comfort Systems USA, Inc. · Industrials · Engineering & Construction
Momentum inputs (comparable managers):
holder breadth +5.9% ·
share flow -6.6% ·
net new positions +5.6%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 179 | +6 | 25.14M | $49.66B | +9 | −2 |
| Q1 2026 | 175 | +5 | 24.43M | $33.47B | +7 | −3 |
| Q4 2025 | 169 | +1 | 27.03M | $25.24B | +2 | — |
| Q3 2025 | 25 | +2 | 18.02M | $14.86B | +2 | −1 |
| Q2 2025 | 21 | 0 | 16.24M | $8.71B | +1 | −1 |
| Q1 2025 | 18 | 0 | 7.27M | $2.34B | — | — |
| Q4 2024 | 18 | +1 | 6.29M | $2.67B | +1 | — |
| Q3 2024 | 16 | -1 | 5.63M | $2.20B | — | −1 |
| Q2 2024 | 17 | — | 5.97M | $1.82B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Capital World Investors ✦ | 2.15M | -5.7% | $910.49M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 2 | State Street Global Advisors ✦ (passive) | 1.10M | — | $468.24M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 769.53K | +2.9% | $326.41M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 4 | Geode Capital Management ✦ (passive) | 769.53K | +2.9% | $326.41M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 5 | Baillie Gifford ✦ | 605.36K | -39.9% | $256.71M | 0.2% | ▼ Trim | 3 | SEC ↗ |
| 6 | Baillie Gifford ✦ | 605.36K | -39.9% | $256.71M | 0.2% | ▼ Trim | 3 | SEC ↗ |
| 7 | Baillie Gifford ✦ | 605.36K | -39.9% | $256.71M | 0.2% | ▼ Trim | 3 | SEC ↗ |
| 8 | Baillie Gifford ✦ | 605.36K | -39.9% | $256.71M | 0.2% | ▼ Trim | 3 | SEC ↗ |
| 9 | Norges Bank ✦ (passive) | 462.56K | +5.5% | $196.15M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 10 | AQR Capital Management ✦ | 256.98K | +25.2% | $108.97M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 11 | AQR Capital Management ✦ | 256.98K | +25.2% | $108.97M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 12 | AQR Capital Management ✦ | 256.98K | +25.2% | $108.97M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 13 | AQR Capital Management ✦ | 256.98K | +25.2% | $108.97M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 14 | Arrowstreet Capital ✦ | 170.23K | +27.3% | $72.19M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 15 | Millennium Management ✦ | 167.31K | -4.1% | $70.95M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 16 | T. Rowe Price ✦ | 147.79K | -8.7% | $62.67M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 17 | T. Rowe Price ✦ | 147.79K | -8.7% | $62.67M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 18 | Wellington Management ✦ | 128.12K | -9.7% | $54.33M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 19 | Wellington Management ✦ | 128.12K | -9.7% | $54.33M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 20 | Wellington Management ✦ | 128.12K | -9.7% | $54.33M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 21 | Wellington Management ✦ | 128.12K | -9.7% | $54.33M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 22 | Wellington Management ✦ | 128.12K | -9.7% | $54.33M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 23 | Bridgewater Associates ✦ | 100.93K | +542.1% | $42.80M | 0.2% | ▲ Add | 3 | SEC ↗ |
| 24 | D. E. Shaw & Co. ✦ | 83.90K | -35.2% | $35.58M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 25 | D. E. Shaw & Co. ✦ | 83.90K | -35.2% | $35.58M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 26 | Renaissance Technologies ✦ | 51.30K | -45.4% | $21.75M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 27 | Two Sigma Investments ✦ | 40.87K | +8.5% | $17.33M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 28 | Citadel Advisors ✦ | 25.55K | -38.3% | $10.83M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 29 | Citadel Advisors ✦ | 25.55K | -38.3% | $10.83M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 30 | Gotham Asset Management ✦ | 14.75K | +10.3% | $6.25M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 31 | Markel Group ✦ | 13.00K | 0.0% | $5.51M | 0.0% | Held | 3 | SEC ↗ |
| 32 | Marshall Wace ✦ | 529 | New | $224,328 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Marshall Wace | $224,328 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1,187 holders, 31.59M shares, $41.94B 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 · 2.55K sh · $4.75M
Director · 4.00K sh · $6.78M
Director · 3.50K sh · $5.92M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology