Axcelis Technologies (ACLS)
Builds ion implanters and lifecycle services for silicon and silicon-carbide chip production.
$115.74
After hours+0.05 (+0.04%)
At close$115.69(+2.24%)
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13F · 13D/G · Form 4
| Institutions | ≈ 102.13% | 31.39M shares | |
|---|---|---|---|
| 459 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail | |||
| Insiders | 1.49% | 457.1K shares | |
| 17 holders · as of Sep 16, 2026 | |||
| Adds to | 103.62% | ||
30.73M company shares as of Sep 22, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.
These groups come from separate filings that can overlap, so they add to 103.62%; nothing is left for Other.
13F, as of Jun 30, 2026
459 holders · 31.39M shares · 110 new positions · 228 increased · 147 reduced · 52 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 5.03M | 16.36% | +92.7K | Aug 7, 2026 |
| FMR LLC | 4.13M | 13.42% | +1.69M | Aug 13, 2026 |
| Vanguard Portfolio Management LLC | 2.48M | 8.07% | −9.4K | Aug 13, 2026 |
| Vanguard Capital Management LLC | 1.39M | 4.51% | +3.7K | Aug 13, 2026 |
| State Street Corp | 1.23M | 4.01% | +42.1K | Aug 7, 2026 |
| Victory Capital Management Inc | 1.13M | 3.69% | −145.0K | Aug 7, 2026 |
| Reinhart Partners, Inc. | 928.7K | 3.02% | −729.1K | Jul 8, 2026 |
| Geode Capital Management, LLC | 833.6K | 2.71% | +22.3K | Aug 12, 2026 |
13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 15.30% | 4.91M | 13G | Apr 29, 2025 |
| FMR LLC | 11.30% | 3.48M | 13G | May 7, 2026 |
| Vanguard Portfolio Management | 8.14% | 2.50M | 13G | Apr 28, 2026 |
| Vanguard Capital Management | 5.26% | 1.62M | 13G | Apr 29, 2026 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Jun 3, 2026 | Necip Sayinerdirector | Sale | 1,586 | $157.44 | 7,112 |
| May 27, 2026 | Todd Suttonofficer: VP Corporate Controller | Sale | 2,000 | $159.99 | 6,360 |
| May 22, 2026 | Thomas st Dennisdirector | Sale | 900 | $155.37 | 17,695 |
| May 21, 2026 | Gerald M. Blumenstockofficer: EVP, Research, Dev. & Eng. | Sale | 1,161 | $152.70 | 20,493 |
| May 22, 2026 | Eileen Evansofficer: EVP, General Counsel and Sec'y | Sale | 926 | $155.51 | 31,295 |
| May 20, 2026 | Christopher Tatnallofficer: EVP Global Customer Operations | Sale | 1,166 | $149.75 | 27,627 |
| May 19, 2026 | Jeanne Quirkdirector | Sale | 1,789 | $140.22 | 11,400 |
| May 19, 2026 | John T. Kurtzweildirector | Sale | 3,500 | $138.79 | 32,990 |
| May 19, 2026 | Gregory B. Gravesdirector | Sale · 2 lots | 3,225 | $141.61 | 5,473 |
| May 14, 2026 | Gerald M. Blumenstockofficer: EVP, Research, Dev. & Eng. | Sale | 1,015 | $162.32 | 17,293 |
House and Senate disclosures
Not reported.