ACLS
Axcelis Technologies, Inc. · Technology · Semiconductors
Momentum inputs (comparable managers):
holder breadth -6.7% ·
share flow +2.9% ·
net new positions -7.1%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 115 | +8 | 23.56M | $4.45B | +14 | −6 |
| Q1 2026 | 110 | -2 | 24.77M | $2.31B | +8 | −11 |
| Q4 2025 | 113 | -1 | 26.05M | $2.10B | +2 | −2 |
| Q3 2025 | 19 | +2 | 15.18M | $1.48B | +3 | −2 |
| Q2 2025 | 15 | 0 | 13.89M | $968.02M | — | — |
| Q1 2025 | 12 | -2 | 4.01M | $199.11M | — | −2 |
| Q4 2024 | 14 | -1 | 4.97M | $347.01M | — | −1 |
| Q3 2024 | 14 | +1 | 3.52M | $369.55M | +2 | −1 |
| Q2 2024 | 13 | — | 3.59M | $510.78M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 1.30M | — | $90.91M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | PRIMECAP Management ✦ | 916.43K | -6.0% | $64.03M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 897.75K | +2.7% | $62.74M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 4 | Geode Capital Management ✦ (passive) | 897.75K | +2.7% | $62.74M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 5 | T. Rowe Price ✦ | 524.37K | -0.5% | $36.64M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 6 | T. Rowe Price ✦ | 524.37K | -0.5% | $36.64M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 7 | Norges Bank ✦ (passive) | 515.96K | +17.1% | $36.05M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 8 | Millennium Management ✦ | 290.27K | +148.7% | $20.28M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 9 | Renaissance Technologies ✦ | 212.00K | +432.7% | $14.81M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 10 | Citadel Advisors ✦ | 131.56K | +66.2% | $9.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 11 | Citadel Advisors ✦ | 131.56K | +66.2% | $9.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 12 | Marshall Wace ✦ | 45.12K | -75.7% | $3.15M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 13 | D. E. Shaw & Co. ✦ | 40.38K | +171.7% | $2.82M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 14 | D. E. Shaw & Co. ✦ | 40.38K | +171.7% | $2.82M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 15 | AQR Capital Management ✦ | 34.04K | +12.0% | $2.38M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 16 | AQR Capital Management ✦ | 34.04K | +12.0% | $2.38M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 17 | Gotham Asset Management ✦ | 23.99K | +110.0% | $1.68M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 18 | Two Sigma Investments ✦ | 19.64K | +169.0% | $1.37M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 19 | Bridgewater Associates ✦ | 13.68K | -28.2% | $955,682 | 0.0% | ▼ Trim | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Wellington Management | $21.34M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 371 holders, 32.35M shares, $2.91B 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.