AXCELIS TECHNOLOGIES INC ACLS
COM NEW · Common Stock · CUSIP 054540208 · ISIN US0545402085
Engages in the design, manufacture, and servicing of capital equipment for the semiconductor manufacturing industry
- SectorIndustrials
- IndustrySpecial Industry Machinery, NEC
- HeadquartersBeverly, MA
- Founded1995
- Websiteaxcelis.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($526.7k this quarter). Holder counts are more reliable. Shares outstanding: 31.4m as of 2025-08-01, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $69.76. Options: 11 managers hold calls ($34.3m notional), 13 hold puts ($34.4m).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 287 |
| Q4 2022 | 328 |
| Q1 2023 | 379 |
| Q2 2023 | 406 |
| Q3 2023 | 421 |
| Q4 2023 | 421 |
| Q1 2024 | 383 |
| Q2 2024 | 391 |
| Q3 2024 | 369 |
| Q4 2024 | 325 |
| Q1 2025 | 307 |
| Q2 2025 | 330 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 209 | 199 |
| Q4 2023 | 222 | 196 |
| Q1 2024 | 172 | 258 |
| Q2 2024 | 202 | 179 |
| Q3 2024 | 181 | 202 |
| Q4 2024 | 166 | 192 |
| Q1 2025 | 168 | 152 |
| Q2 2025 | 168 | 147 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $30.9m | $52.2m | 1.69 |
| Q4 2024 | $48.7m | $39.5m | 0.81 |
| Q1 2025 | $28.5m | $26.1m | 0.91 |
| Q2 2025 | $34.3m | $34.4m | 1.00 |
Biggest buyers
| VICTORY CAPITAL MANAGEMENT INC | Added | +867.6k |
| AMERICAN CENTURY COMPANIES INC | Added | +519.0k |
| FMR LLC | Added | +333.0k |
| ROYAL BANK OF CANADA | Added | +303.6k |
| CITADEL ADVISORS LLC | Added | +232.4k |
| CITIGROUP INC | Added | +202.8k |
| Boston Partners | Added | +141.0k |
| Balyasny Asset Management L.P. | New | +90.7k |
| Clark Capital Management Group, Inc. | New | +84.6k |
| Trexquant Investment LP | New | +81.0k |
Biggest sellers
| Amundi | Reduced | -545.7k |
| BlackRock, Inc. | Reduced | -316.5k |
| BANK OF AMERICA CORP /DE/ | Reduced | -216.0k |
| Jackson Square Partners, LLC | Reduced | -175.3k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Reduced | -169.5k |
| SEI INVESTMENTS CO | Reduced | -147.8k |
| Grantham, Mayo, Van Otterloo & Co. LLC | Reduced | -137.3k |
| M&G PLC | Sold out | -136.9k |
| BlackBarn Capital Partners LP | Reduced | -120.4k |
| MIZUHO MARKETS AMERICAS LLC | Sold out | -119.4k |
Biggest calls
| CITADEL ADVISORS LLC | Reduced | $13.4m191.8k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $9.5m136.6k shares |
| PEAK6 LLC | New | $2.9m41.8k shares |
| IMC-Chicago, LLC | Added | $2.4m33.8k shares |
| CAPITAL FUND MANAGEMENT S.A. | Reduced | $2.2m31.9k shares |
| TUDOR INVESTMENT CORP ET AL | Reduced | $1.7m25.0k shares |
| Walleye Capital LLC | New | $696.9k10.0k shares |
| Walleye Trading LLC | New | $655.1k9.4k shares |
| SIMPLEX TRADING, LLC | Reduced | $578.0k8.3k shares |
| GROUP ONE TRADING LLC | Reduced | $230.0k3.3k shares |
Biggest puts
| CITADEL ADVISORS LLC | Reduced | $9.2m132.0k shares |
| PEAK6 LLC | Added | $7.9m112.8k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $5.8m83.8k shares |
| CAPITAL FUND MANAGEMENT S.A. | Added | $2.3m33.6k shares |
| D. E. Shaw & Co., Inc. | Reduced | $1.8m25.7k shares |
| TUDOR INVESTMENT CORP ET AL | Reduced | $1.5m20.9k shares |
| IMC-Chicago, LLC | Reduced | $1.4m20.8k shares |
| JANE STREET GROUP, LLC | Added | $1.4m19.7k shares |
| SIMPLEX TRADING, LLC | Added | $1.2m17.5k shares |
| Walleye Trading LLC | New | $752.7k10.8k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution filed 2025-04-29 | 15.3% |
| FMR LLC 13G · institution +2.1 pts · filed 2026-08-06 | 13.4% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-28 | 8.1% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.3% |
Fell to 5% or below in the last year: REINHART PARTNERS, LLC. (3.0%, 2026-07-14), VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC), AMERICAN CENTURY INVESTMENT MANAGEMENT INC (4.3%, 2025-11-14)
Insider purchases and sales in Q2 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q3 2023 | 0 | — | 5 | $2.6m | — |
| Q4 2023 | 0 | — | 1 | $135.5k | — |
| Q1 2024 | 3 | $116.2k | 0 | — | — |
| Q2 2024 | 0 | — | 1 | $137.3k | — |
| Q3 2024 | 0 | — | 1 | $669.3k | — |
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 1 | $104.2k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-05-20 | KURTZWEIL JOHN T Director | Sold | $104.2k1.7k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 5.0m $350.0m | Reduced -316.5k |
| VANGUARD GROUP INC 0.00% of their portfolio | 4.3m $301.3m | Reduced -116.0k |
| AMERICAN CENTURY COMPANIES INC 0.06% of their portfolio | 1.7m $115.6m | Added +519.0k |
| REINHART PARTNERS, LLC. 3.61% of their portfolio | 1.5m $105.8m | Added +77.5k |
| STATE STREET CORP 0.00% of their portfolio | 1.2m $87.0m | Added +478 |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 925.3k $64.5m | Reduced -266 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.16% of their portfolio | 921.1k $64.2m | Reduced -99.6k |
| VICTORY CAPITAL MANAGEMENT INC 0.04% of their portfolio | 886.8k $63.6m | Added +867.6k |
| PRIMECAP MANAGEMENT CO/CA/ 0.05% of their portfolio | 852.3k $59.4m | Added +17.2k |
| Boston Trust Walden Corp 0.42% of their portfolio | 845.9k $59.0m | Added +19.6k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 735.5k $51.3m | Added +34.2k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 703.4k $49.0m | Reduced -216.0k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 591.2k $41.2m | Reduced -44.2k |
| MORGAN STANLEY 0.00% of their portfolio | 550.2k $38.3m | Added +42.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 529.1k $36.9m | Added +2.7k |
| Boston Partners 0.04% of their portfolio | 474.0k $33.6m | Added +141.0k |
| Grantham, Mayo, Van Otterloo & Co. LLC 0.09% of their portfolio | 442.1k $30.8m | Reduced -137.3k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 441.7k $30.8m | Added +39.7k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 421.1k $29.4m | Added +303.6k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 406.4k $28.3m | Added +20.4k |
| FMR LLC 0.00% of their portfolio | 382.6k $26.7m | Added +333.0k |
| CITIGROUP INC 0.02% of their portfolio | 362.5k $25.3m | Added +202.8k |
| BlackBarn Capital Partners LP 8.31% of their portfolio | 360.0k $25.1m | Reduced -120.4k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.08% of their portfolio | 311.8k $21.7m | Reduced -169.5k |
| ROYCE & ASSOCIATES LP 0.19% of their portfolio | 265.0k $18.5m | Reduced -15.9k |
| CITADEL ADVISORS LLC 0.02% of their portfolio | 254.5k $17.7m | Added +232.4k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 226.1k $15.8m | Added +13.5k |
| FEDERATED HERMES, INC. 0.03% of their portfolio | 221.2k $15.4m | Added +27.0k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 205.7k $14.3m | Added +11.6k |
| UBS Group AG 0.00% of their portfolio | 198.0k $13.8m | Reduced -74.1k |
| BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio | 192.2k $13.4m | Added +57.1k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 177.9k $12.4m | Added +7.9k |
| Invesco Ltd. 0.00% of their portfolio | 139.8k $9.7m | Added +1.5k |
| HARBOR CAPITAL ADVISORS, INC. 0.40% of their portfolio | 135.6k $9.4m | Reduced -5.0k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.22% of their portfolio | 133.2k $9.3m | Added +3.3k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 122.4k $8.5m | Added +22.6k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 111.4k $7.8m | Added +32.6k |
| Public Sector Pension Investment Board 0.03% of their portfolio | 109.6k $7.6m | Added +6.5k |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 107.4k $7.5m | Reduced -76.6k |
| Pacer Advisors, Inc. 0.02% of their portfolio | 106.5k $7.4m | Reduced -55.0k |
| Squarepoint Ops LLC 0.02% of their portfolio | 100.0k $7.0m | Added +27.0k |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 97.2k $6.8m | Added +35.0k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 94.8k $6.6m | Reduced -1.9k |
| Balyasny Asset Management L.P. 0.01% of their portfolio | 90.7k $6.3m | New |
| STATE OF WISCONSIN INVESTMENT BOARD 0.02% of their portfolio | 90.6k $6.3m | Added +12.1k |
| Legal & General Group Plc 0.00% of their portfolio | 88.6k $6.2m | Reduced -16.7k |
| PARADIGM CAPITAL MANAGEMENT INC/NY 0.30% of their portfolio | 88.1k $6.1m | Reduced -94.0k |
| Clark Capital Management Group, Inc. 0.04% of their portfolio | 84.6k $5.9m | New |
| Trexquant Investment LP 0.06% of their portfolio | 81.0k $5.6m | New |
| BARCLAYS PLC 0.00% of their portfolio | 78.3k $5.5m | Added +22.0k |
| D. E. Shaw & Co., Inc. 0.01% of their portfolio | 78.3k $5.5m | Added +71.9k |
| Nuveen, LLC 0.00% of their portfolio | 74.2k $5.2m | Reduced -15.3k |
| First Eagle Investment Management, LLC 0.01% of their portfolio | 73.0k $5.1m | New |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 71.6k $5.0m | Added +10.1k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 70.0k $4.9m | Added +62.7k |
| Susquehanna Portfolio Strategies, LLC 0.10% of their portfolio | 67.9k $4.7m | New |
| Creative Planning 0.00% of their portfolio | 67.2k $4.7m | Added +19.8k |
| JANE STREET GROUP, LLC 0.01% of their portfolio | 65.5k $4.6m | Reduced -55.9k |
| NORGES BANK 0.00% of their portfolio | 62.4k $4.4m | Reduced -23.9k |
| Swiss National Bank 0.00% of their portfolio | 61.5k $4.3m | Reduced -1.5k |
| QSM Asset Management Ltd 3.89% of their portfolio | 60.4k $4.2m | New |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.00% of their portfolio | 54.5k $3.8m | Added +21.0k |
| WINTON GROUP Ltd 0.19% of their portfolio | 54.3k $3.8m | Reduced -47.0k |
| LPL Financial LLC 0.00% of their portfolio | 54.1k $3.8m | Reduced -2.4k |
| Verition Fund Management LLC 0.02% of their portfolio | 50.2k $3.5m | Added +15.2k |
| Private Advisor Group, LLC 0.02% of their portfolio | 48.6k $3.4m | Reduced -4.9k |
| Soviero Asset Management, LP 2.45% of their portfolio | 48.0k $3.3m | New |
| GLOBEFLEX CAPITAL L P 0.25% of their portfolio | 43.5k $3.0m | Added +25.0k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 43.3k $3.0m | Added +7.6k |
| Mizuho Markets Cayman LP 0.21% of their portfolio | 42.4k $3.0m | New |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 41.0k $2.9m | Reduced -24.4k |
| Janney Montgomery Scott LLC 0.01% of their portfolio | 38.9k $2.7m | Added +19.8k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 38.3k $2.7m | Added +13.2k |
| Penbrook Management LLC 0.81% of their portfolio | 36.5k $2.2m | Added +16.9k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.01% of their portfolio | 36.0k $2.5m | New |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 35.9k $2.5m | Reduced -8.5k |
| Holocene Advisors, LP 0.01% of their portfolio | 35.8k $2.5m | Reduced -60.9k |
| CANADA LIFE ASSURANCE Co 0.00% of their portfolio | 35.5k $2.5m | Reduced -1.5k |
| Quantbot Technologies LP 0.06% of their portfolio | 35.3k $2.5m | Reduced -29.8k |
| Jackson Square Partners, LLC 0.90% of their portfolio | 35.0k $2.4m | Reduced -175.3k |
| Aquatic Capital Management LLC 0.05% of their portfolio | 34.6k $2.4m | Added +14.6k |
| Homestead Advisers Corp 0.06% of their portfolio | 34.2k $2.4m | Unchanged |
| ISTHMUS PARTNERS, LLC 0.28% of their portfolio | 34.2k $2.4m | Added +2.5k |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 33.4k $2.3m | Added +1.6k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 32.8k $2.3m | Reduced -2.7k |
| OPTIMIZE FINANCIAL INC. 1.37% of their portfolio | 32.0k $2.2m | Reduced -230 |
| New Insight Wealth Advisors 0.91% of their portfolio | 31.8k $2.2m | Unchanged |
| RICE HALL JAMES & ASSOCIATES, LLC 0.12% of their portfolio | 31.7k $2.2m | Reduced -1.2k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 30.1k $2.1m | Added +358 |
| BRIDGES INVESTMENT MANAGEMENT INC 0.03% of their portfolio | 29.8k $2.1m | Added +4.0k |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.00% of their portfolio | 28.0k $2.0m | Added +13.9k |
| FOX RUN MANAGEMENT, L.L.C. 0.32% of their portfolio | 27.5k $1.9m | New |
| ExodusPoint Capital Management, LP 0.02% of their portfolio | 27.4k $1.9m | Reduced -17.2k |
| Brevan Howard Capital Management LP 0.02% of their portfolio | 27.0k $1.9m | New |
| Ruffer LLP 0.08% of their portfolio | 24.7k $1.7m | New |
| CHASE INVESTMENT COUNSEL CORP 0.53% of their portfolio | 24.0k $1.7m | Unchanged |
| Thrivent Financial for Lutherans 0.00% of their portfolio | 23.6k $1.6m | Reduced -3.7k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 23.3k $1.6m | Reduced -345 |
| PEAK6 LLC 0.03% of their portfolio | 23.2k $1.6m | Added +17.0k |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 23.2k $1.6m | Reduced -31.6k |