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 ($1.2k this quarter). Holder counts are more reliable. Shares outstanding: 32.1m as of 2025-05-02, 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 ≈ $49.58. Options: 11 managers hold calls ($28.5m notional), 12 hold puts ($26.1m).
Trends to Q1 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 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2023 | 187 | 210 |
| 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 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2024 | $72.1m | $48.1m | 0.67 |
| Q3 2024 | $30.9m | $52.2m | 1.69 |
| Q4 2024 | $48.7m | $39.5m | 0.81 |
| Q1 2025 | $28.5m | $26.1m | 0.91 |
Biggest buyers
| BANK OF AMERICA CORP /DE/ | Added | +634.1k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Added | +424.6k |
| BlackBarn Capital Partners LP | Added | +424.4k |
| REINHART PARTNERS, LLC. | Added | +404.9k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Added | +258.6k |
| MIZUHO MARKETS AMERICAS LLC | New | +119.4k |
| Walleye Capital LLC | Added | +92.7k |
| WINTON GROUP Ltd | Added | +86.5k |
| AMERICAN CENTURY COMPANIES INC | Added | +80.4k |
| KENNEDY CAPITAL MANAGEMENT LLC | Added | +76.0k |
Biggest sellers
| Pacer Advisors, Inc. | Reduced | -620.7k |
| NORGES BANK | Reduced | -429.6k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Sold out | -233.0k |
| Grantham, Mayo, Van Otterloo & Co. LLC | Reduced | -184.7k |
| Senvest Management, LLC | Sold out | -138.2k |
| Qube Research & Technologies Ltd | Reduced | -133.7k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -122.5k |
| JANE STREET GROUP, LLC | Reduced | -117.0k |
| NEUBERGER BERMAN GROUP LLC | Sold out | -112.2k |
| CITADEL ADVISORS LLC | Reduced | -109.5k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $14.3m288.6k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $6.1m123.3k shares |
| CAPITAL FUND MANAGEMENT S.A. | Added | $1.6m33.0k shares |
| TUDOR INVESTMENT CORP ET AL | Reduced | $1.6m32.3k shares |
| WOLVERINE TRADING, LLC | Added | $1.6m31.5k shares |
| IMC-Chicago, LLC | Reduced | $1.3m26.3k shares |
| SIMPLEX TRADING, LLC | Added | $938.0k18.9k shares |
| JANE STREET GROUP, LLC | Reduced | $417.2k8.4k shares |
| D. E. Shaw & Co., Inc. | New | $342.7k6.9k shares |
| GROUP ONE TRADING LLC | New | $243.4k4.9k shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $10.0m200.8k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $4.7m93.9k shares |
| D. E. Shaw & Co., Inc. | Reduced | $2.9m58.4k shares |
| TUDOR INVESTMENT CORP ET AL | Reduced | $2.5m50.6k shares |
| IMC-Chicago, LLC | Reduced | $1.4m28.1k shares |
| CAPITAL FUND MANAGEMENT S.A. | Added | $1.3m26.9k shares |
| PEAK6 LLC | Added | $1.3m25.9k shares |
| WOLVERINE TRADING, LLC | Reduced | $760.6k15.3k shares |
| JANE STREET GROUP, LLC | Reduced | $745.0k15.0k shares |
| SIMPLEX TRADING, LLC | Added | $456.0k9.2k 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 Q1 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 |
|---|---|---|---|---|---|
| Q2 2023 | 0 | — | 10 | $26.1m | — |
| 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 | — | — |
None reported in Q1 2025.
Holders, Q1 2025
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 5.3m $265.2m | Reduced -108.8k |
| VANGUARD GROUP INC 0.00% of their portfolio | 4.4m $220.5m | Added +43.8k |
| REINHART PARTNERS, LLC. 2.61% of their portfolio | 1.4m $71.6m | Added +404.9k |
| STATE STREET CORP 0.00% of their portfolio | 1.2m $62.0m | Reduced -53.0k |
| AMERICAN CENTURY COMPANIES INC 0.03% of their portfolio | 1.1m $56.6m | Added +80.4k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.14% of their portfolio | 1.0m $50.7m | Added +424.6k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 925.6k $46.0m | Added +27.8k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 919.4k $45.7m | Added +634.1k |
| PRIMECAP MANAGEMENT CO/CA/ 0.03% of their portfolio | 835.1k $41.5m | Reduced -81.4k |
| Boston Trust Walden Corp 0.30% of their portfolio | 826.3k $41.0m | Added +6.2k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 701.3k $34.8m | Reduced -23.3k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 635.4k $31.6m | Added +44.3k |
| Grantham, Mayo, Van Otterloo & Co. LLC 0.09% of their portfolio | 579.4k $28.8m | Reduced -184.7k |
| Amundi 0.01% of their portfolio | 551.0k $24.7m | Added +61.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 526.4k $26.1m | Added +2.1k |
| MORGAN STANLEY 0.00% of their portfolio | 507.4k $25.2m | Added +11.9k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.09% of their portfolio | 481.3k $23.9m | Added +258.6k |
| BlackBarn Capital Partners LP 8.15% of their portfolio | 480.4k $23.9m | Added +424.4k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 401.9k $20.0m | Added +9.9k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 386.0k $19.2m | Added +16.1k |
| Boston Partners 0.02% of their portfolio | 333.0k $16.3m | Added +3.0k |
| ROYCE & ASSOCIATES LP 0.15% of their portfolio | 281.0k $14.0m | Reduced -52.4k |
| UBS Group AG 0.00% of their portfolio | 272.1k $13.5m | Added +23.7k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 212.5k $10.6m | Reduced -13.8k |
| Jackson Square Partners, LLC 1.41% of their portfolio | 210.3k $10.4m | Added +23.8k |
| FEDERATED HERMES, INC. 0.02% of their portfolio | 194.2k $9.6m | Added +12.9k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 194.0k $9.6m | Added +5.5k |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 184.0k $9.1m | Reduced -106.3k |
| PARADIGM CAPITAL MANAGEMENT INC/NY 0.50% of their portfolio | 182.1k $9.0m | Added +28.2k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 170.0k $8.4m | Reduced -19.6k |
| Pacer Advisors, Inc. 0.02% of their portfolio | 161.5k $8.0m | Reduced -620.7k |
| CITIGROUP INC 0.01% of their portfolio | 159.6k $7.9m | Added +41.4k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 158.2k $7.9m | Added +13.0k |
| HARBOR CAPITAL ADVISORS, INC. 0.32% of their portfolio | 140.6k $7.0m | Added +52.8k |
| Invesco Ltd. 0.00% of their portfolio | 138.3k $6.9m | Added +7.1k |
| M&G PLC 0.03% of their portfolio | 136.9k $6.8m | Added +9.3k |
| BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio | 135.1k $6.7m | First filing |
| KENNEDY CAPITAL MANAGEMENT LLC 0.15% of their portfolio | 129.9k $6.5m | Added +76.0k |
| JANE STREET GROUP, LLC 0.01% of their portfolio | 121.4k $6.0m | Reduced -117.0k |
| MIZUHO MARKETS AMERICAS LLC 0.13% of their portfolio | 119.4k $5.9m | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 117.6k $5.8m | Added +4.3k |
| Legal & General Group Plc 0.00% of their portfolio | 105.3k $5.2m | Reduced -2.4k |
| Public Sector Pension Investment Board 0.02% of their portfolio | 103.1k $5.1m | Added +22.0k |
| WINTON GROUP Ltd 0.31% of their portfolio | 101.4k $5.0m | Added +86.5k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 99.8k $5.0m | Reduced -2.2k |
| Holocene Advisors, LP 0.01% of their portfolio | 96.7k $4.8m | Added +12.4k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 96.6k $4.8m | Added +5.8k |
| Walleye Capital LLC 0.05% of their portfolio | 94.2k $4.7m | Added +92.7k |
| Nuveen, LLC 0.00% of their portfolio | 89.5k $4.4m | First filing |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 89.5k $4.4m | Reduced -122.5k |
| NORGES BANK 0.00% of their portfolio | 86.4k $4.3m | Reduced -429.6k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 78.8k $3.9m | Added +836 |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 78.5k $3.9m | Added +24.7k |
| Squarepoint Ops LLC 0.01% of their portfolio | 73.0k $3.6m | New |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 65.4k $3.2m | Reduced -8.7k |
| Quantbot Technologies LP 0.10% of their portfolio | 65.1k $3.2m | Added +27.3k |
| Swiss National Bank 0.00% of their portfolio | 63.0k $3.1m | Reduced -1.1k |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 62.3k $3.1m | Reduced -28.3k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 61.5k $3.1m | Reduced -4.6k |
| CAXTON ASSOCIATES LLP 0.11% of their portfolio | 60.9k $3.0m | First filing |
| Numerai GP LLC 0.57% of their portfolio | 60.8k $3.0m | Added +37.0k |
| Engineers Gate Manager LP 0.05% of their portfolio | 58.8k $2.9m | Reduced -67.4k |
| LPL Financial LLC 0.00% of their portfolio | 56.4k $2.8m | Reduced -4.4k |
| BARCLAYS PLC 0.00% of their portfolio | 56.3k $2.8m | Reduced -17.2k |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 54.8k $2.7m | Added +34.0k |
| HRT FINANCIAL LP 0.02% of their portfolio | 54.8k $2.7m | New |
| Private Advisor Group, LLC 0.02% of their portfolio | 53.6k $2.7m | Added +47.5k |
| FMR LLC 0.00% of their portfolio | 49.6k $2.5m | Added +27.5k |
| Creative Planning 0.00% of their portfolio | 47.4k $2.4m | Added +11.9k |
| ExodusPoint Capital Management, LP 0.03% of their portfolio | 44.6k $2.2m | New |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 44.3k $2.2m | Added +24.7k |
| Jump Financial, LLC 0.03% of their portfolio | 37.2k $1.8m | Reduced -7.3k |
| CANADA LIFE ASSURANCE Co 0.00% of their portfolio | 37.0k $1.8m | Reduced -714 |
| Focus Partners Wealth 0.00% of their portfolio | 36.4k $1.8m | Added +7.7k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 35.7k $1.8m | Added +1.7k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 35.5k $1.8m | Added +5.4k |
| Verition Fund Management LLC 0.01% of their portfolio | 35.0k $1.7m | Reduced -8.7k |
| Homestead Advisers Corp 0.04% of their portfolio | 34.2k $1.7m | Added +4.6k |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.00% of their portfolio | 33.5k $1.7m | Unchanged |
| RICE HALL JAMES & ASSOCIATES, LLC 0.10% of their portfolio | 32.9k $1.6m | Added +1 |
| OPTIMIZE FINANCIAL INC. 0.60% of their portfolio | 32.3k $1.6m | New |
| New Insight Wealth Advisors 0.72% of their portfolio | 31.8k $1.6m | New |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 31.8k $1.6m | Reduced -11.1k |
| ISTHMUS PARTNERS, LLC 0.20% of their portfolio | 31.6k $1.6m | Added +3.3k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 29.8k $1.5m | Reduced -735 |
| Thrivent Financial for Lutherans 0.00% of their portfolio | 27.4k $1.5m | Reduced -1.2k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 26.4k $1.3m | Reduced -2.1k |
| BRIDGES INVESTMENT MANAGEMENT INC 0.02% of their portfolio | 25.8k $1.3m | Added +14.6k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 25.1k $1.2m | Added +3.6k |
| Schonfeld Strategic Advisors LLC 0.01% of their portfolio | 24.6k $1.2m | Added +10.8k |
| CHASE INVESTMENT COUNSEL CORP 0.44% of their portfolio | 24.0k $1.2m | Added +9.0k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 23.6k $1.2m | Added +360 |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 22.1k $1.1m | Reduced -109.5k |
| Andra AP-fonden 0.02% of their portfolio | 20.0k $992.9k | New |
| Aquatic Capital Management LLC 0.03% of their portfolio | 20.0k $992.7k | Added +7.0k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 20.0k $992.0k | Added +14.3k |
| Nebula Research & Development LLC 0.09% of their portfolio | 19.8k $981.8k | Added +11.8k |
| Penbrook Management LLC 0.74% of their portfolio | 19.6k $975.5k | Added +75 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 19.4k $963.4k | Added +849 |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 19.2k $951.8k | Added +1.6k |