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NasdaqGS · Technology · Holders
Axcelis Technologies Inc top institutional holders.
Top institutional shareholders of ACLS ranked by position size, plus filing changes and recent insider transactions when available.
- Holder rows
- 120
- Market data feed
- Latest filing
- Mar 31, 2026
- Most recent holder report date
- Increased / initiated
- 59
- 55 decreased in loaded rows
- Insider rows
- 120
- Market data feed
Top 120 institutional holders
Axcelis Technologies Inc (ACLS)
| # | Institution | % held | Shares | Change | Change % | Filing date |
|---|---|---|---|---|---|---|
| 1 | 16.1% | 4.94M | +109.20K increased | +2.26% | Mar 31, 2026 | |
| 2 | 13.4% | 4.12M | -63.17K decreased | -1.51% | Dec 31, 2025 | |
| 3 | 8.09% | 2.49M | +2.49M initiated | — | Mar 31, 2026 | |
| 4 | 7.91% | 2.43M | +1.82M increased | +2.98% | Mar 31, 2026 | |
| 5 | REINHART PARTNERS | 5.39% | 1.66M | +67.85K increased | +4.27% | Mar 31, 2026 |
| 6 | 4.50% | 1.38M | +1.38M initiated | — | Mar 31, 2026 | |
| 7 | BALYASNY ASSET MANAGEMENT L.P. | 4.44% | 1.36M | +1.12M increased | +4.60% | Mar 31, 2026 |
| 8 | VICTORY CAPITAL MANAGEMENT INC | 4.16% | 1.28M | -528.40K decreased | -29.23% | Mar 31, 2026 |
| 9 | 3.87% | 1.19M | +2.82K increased | +24.00% | Mar 31, 2026 | |
| 10 | BNP PARIBAS ASSET MANAGEMENT HOLDING S.A. | 3.27% | 1.01M | -85.07K decreased | -7.80% | Mar 31, 2026 |
| 11 | AMERICAN CENTURY COMPANIES INC | 3.10% | 951.91K | -281.73K decreased | -22.84% | Mar 31, 2026 |
| 12 | 2.74% | 844.10K | +3.06K increased | +36.00% | Mar 31, 2026 | |
| 13 | 2.64% | 811.26K | -106.48K decreased | -11.60% | Mar 31, 2026 | |
| 14 | PRIMECAP MANAGEMENT CO | 2.14% | 658.65K | -6.29K decreased | -95.00% | Mar 31, 2026 |
| 15 | 1.89% | 581.64K | +231.42K increased | +66.08% | Mar 31, 2026 | |
| 16 | 1.77% | 544.42K | +74.14K increased | +15.76% | Mar 31, 2026 | |
| 17 | 1.62% | 497.62K | -132.19K decreased | -20.99% | Mar 31, 2026 | |
| 18 | MANUFACTURERS LIFE INSURANCE COMPANY | 1.60% | 491.75K | +477.70K increased | +34.02% | Mar 31, 2026 |
| 19 | 1.45% | 445.77K | +14.57K increased | +3.38% | Mar 31, 2026 | |
| 20 | LSV ASSET MANAGEMENT | 1.40% | 429.50K | — unchanged | 0.00% | Mar 31, 2026 |
Showing 20 of 120 filing-based institutional rows.
Recent insider transactions
Axcelis Technologies Inc (ACLS) Form 4 filings
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | EVANS, EILEEN EVP, General Counsel and Sec'y | <0.01% | D | 926 | $155.51 | $143,998 | May 22, 2026 |
| 2 | BLUMENSTOCK, GERALD M EVP, Research, Dev. & Eng. | <0.01% | D | 1.16K | $152.70 | $177,285 | May 21, 2026 |
| 3 | TATNALL, CHRISTOPHER EVP Global Customer Operations | <0.01% | D | 1.17K | $149.75 | $174,609 | May 20, 2026 |
| 4 | GRAVES, GREGORY B Director | <0.01% | D | 2.63K | $141.41 | $371,188 | May 19, 2026 |
| 5 | QUIRK, JEANNE Director | <0.01% | D | 1.79K | $140.22 | $250,854 | May 19, 2026 |
| 6 | KURTZWEIL, JOHN T Director | 0.01% | D | 3.50K | $138.79 | $485,771 | May 19, 2026 |
| 7 | GRAVES, GREGORY B Director | <0.01% | D | 2.63K | $141.41 | $371,188 | May 19, 2026 |
| 8 | QUIRK, JEANNE Director | <0.01% | D | 1.79K | $140.22 | $250,854 | May 19, 2026 |
| 9 | GRAVES, GREGORY B Director | <0.01% | D | 600 | $142.51 | $85,509 | May 19, 2026 |
| 10 | KURTZWEIL, JOHN T Director | 0.01% | D | 3.50K | $138.79 | $485,771 | May 19, 2026 |
| 11 | GRAVES, GREGORY B Director | <0.01% | D | 600 | $142.51 | $85,509 | May 19, 2026 |
| 12 | REDINBO, GREG EVP MARKETING AND APPLICATIONS | <0.01% | D | 111 | $146.24 | $16,233 | May 18, 2026 |
Showing 12 of 120 filing-based insider rows. Percent of company uses current shares outstanding when available.
Frequently asked
Common questions.
Who are the largest ACLS shareholders?
TECHi's ACLS Holders page ranks the largest institutional shareholders of Axcelis Technologies Inc using filing-based market-data feeds.
What is institutional ownership of ACLS?
The Holders page shows institutional positions by share count and, when available, the latest filing change so readers can spot accumulation, reductions, initiated positions, and unchanged holdings.
Where can I see Axcelis Technologies Inc insider transactions?
Recent insider buys, sales, awards, gifts, and option exercises appear below the institutional holders table when Form 4 rows are available.