AXCELIS TECHNOLOGIES INC (ACLS): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in ACLS · Information Technology. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
25
13F filers
Aggregate Value
$386.0M
Across holders
Last Price
$123.49
2026-08-24
Sector
Information Technology
GICS
Quarterly fund activity15 increased9 reduced4 exited
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| BALYASNY ASSET MANAGEMENT LLC CIK 0001218710 | Hedge Fund | 616K | $116.7M | 30.2% | 0.1% | Reduced | $-141.8M | Q2 2026 |
| PRIMECAP MANAGEMENT CO/CA/ CIK 0000763212 | Institutional Manager | 610K | $115.6M | 30.0% | 0.1% | Reduced | $-9.1M | Q2 2026 |
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 139K | $26.4M | 6.8% | 0.0% | Added | +$24.0M | Q2 2026 |
| Grantham, Mayo, Van Otterloo & Co. LLC CIK 0001352662 | Institutional Manager | 136K | $25.7M | 6.7% | 0.1% | Reduced | $-37.7M | Q2 2026 |
| SHAW D E & CO INC CIK 0001009207 | Hedge Fund | 133K | $25.2M | 6.5% | 0.0% | Reduced | $-173.0M | Q2 2026 |
| First Eagle Investment Management, LLC CIK 0001325447 | Institutional Manager | 72K | $13.6M | 3.5% | 0.0% | Reduced | $-5.4M | Q2 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 0001165408 | Hedge Fund | 51K | $9.6M | 2.5% | 0.0% | Added | +$8.2M | Q2 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 48K | $9.2M | 2.4% | 0.0% | Reduced | $-28.3M | Q2 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 46K | $8.8M | 2.3% | 0.0% | Added | +$5.7M | Q2 2026 |
| AQR CAPITAL MANAGEMENT LLC CIK 0001167557 | Hedge Fund | 36K | $6.7M | 1.7% | 0.0% | Reduced | +$6.7M | Q2 2026 |
Reduced
Hedge Fund
$116.7M· 30.2% of total· 0.1% port· 616K sh· $-141.8M QoQ· Q2 2026
Reduced
Institutional Manager
$115.6M· 30.0% of total· 0.1% port· 610K sh· $-9.1M QoQ· Q2 2026
Added
Hedge Fund
$26.4M· 6.8% of total· 0.0% port· 139K sh· +$24.0M QoQ· Q2 2026
Reduced
Institutional Manager
$25.7M· 6.7% of total· 0.1% port· 136K sh· $-37.7M QoQ· Q2 2026
Reduced
Hedge Fund
$25.2M· 6.5% of total· 0.0% port· 133K sh· $-173.0M QoQ· Q2 2026
Reduced
Institutional Manager
$13.6M· 3.5% of total· 0.0% port· 72K sh· $-5.4M QoQ· Q2 2026
Added
Hedge Fund
$9.6M· 2.5% of total· 0.0% port· 51K sh· +$8.2M QoQ· Q2 2026
Reduced
Hedge Fund
$9.2M· 2.4% of total· 0.0% port· 48K sh· $-28.3M QoQ· Q2 2026
Added
Hedge Fund
$8.8M· 2.3% of total· 0.0% port· 46K sh· +$5.7M QoQ· Q2 2026
Reduced
Hedge Fund
$6.7M· 1.7% of total· 0.0% port· 36K sh· +$6.7M QoQ· Q2 2026
Added
Hedge Fund
$5.7M· 1.5% of total· 0.0% port· 30K sh· — QoQ· Q2 2026
Added
Hedge Fund
$4.4M· 1.1% of total· 0.0% port· 23K sh· — QoQ· Q2 2026
Added
Hedge Fund
$4.2M· 1.1% of total· 0.0% port· 22K sh· — QoQ· Q2 2026
Added
Hedge Fund
$2.6M· 0.7% of total· 0.0% port· 14K sh· — QoQ· Q2 2026
Added
Hedge Fund
$2.3M· 0.6% of total· 0.0% port· 12K sh· — QoQ· Q2 2026
Added
Hedge Fund
$2.2M· 0.6% of total· 0.0% port· 11K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$2.0M· 0.5% of total· 0.0% port· 11K sh· $-217K QoQ· Q2 2026
Reduced
Hedge Fund
$1.8M· 0.5% of total· 0.0% port· 10K sh· $-7.9M QoQ· Q2 2026
Added
Hedge Fund
$987K· 0.3% of total· 0.0% port· 5K sh· +$971K QoQ· Q2 2026
Added
Hedge Fund
$986K· 0.3% of total· 0.0% port· 5K sh· +$270K QoQ· Q2 2026
Added
Hedge Fund
$568K· 0.1% of total· 0.0% port· 3K sh· +$142K QoQ· Q2 2026
Added
Hedge Fund
$498K· 0.1% of total· 0.0% port· 3K sh· — QoQ· Q2 2026
Unchanged
Hedge Fund
$95K· 0.0% of total· 0.0% port· 500 sh· +$0 QoQ· Q2 2026
Added
Hedge Fund
$52K· 0.0% of total· 0.0% port· 274 sh· $-592K QoQ· Q2 2026
Added
Hedge Fund
$22K· 0.0% of total· 0.0% port· 126 sh· — QoQ· Q2 2026
1–10 of 25
1 / 3
Loading recent insider activity…