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 ($32.6k this quarter). Holder counts are more reliable. Shares outstanding: 31.0m as of 2025-11-03, 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 ≈ $97.47. Options: 14 managers hold calls ($30.7m notional), 13 hold puts ($40.8m).
Trends to Q3 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 |
| Q3 2025 | 361 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| 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 |
| Q3 2025 | 178 | 157 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q4 2024 | $48.7m | $39.5m | 0.81 |
| Q1 2025 | $28.5m | $26.1m | 0.91 |
| Q2 2025 | $34.3m | $34.4m | 1.00 |
| Q3 2025 | $30.7m | $40.8m | 1.33 |
Biggest buyers
| LSV ASSET MANAGEMENT | New | +314.9k |
| JPMORGAN CHASE & CO | Added | +256.9k |
| Invesco Ltd. | Added | +246.9k |
| FMR LLC | Added | +168.8k |
| MILLENNIUM MANAGEMENT LLC | Added | +154.4k |
| JANUS HENDERSON GROUP PLC | Added | +138.2k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | New | +117.8k |
| Allspring Global Investments Holdings, LLC | Added | +102.0k |
| REINHART PARTNERS, LLC. | Added | +91.8k |
| BNP PARIBAS FINANCIAL MARKETS | Added | +91.7k |
Biggest sellers
| Boston Trust Walden Corp | Reduced | -385.6k |
| AMERICAN CENTURY COMPANIES INC | Reduced | -313.7k |
| BANK OF AMERICA CORP /DE/ | Reduced | -293.1k |
| ROYAL BANK OF CANADA | Reduced | -252.3k |
| CITADEL ADVISORS LLC | Reduced | -227.7k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Reduced | -216.6k |
| BlackBarn Capital Partners LP | Reduced | -160.0k |
| BlackRock, Inc. | Reduced | -157.8k |
| VANGUARD GROUP INC | Reduced | -138.2k |
| ROYCE & ASSOCIATES LP | Reduced | -120.3k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $10.3m105.3k shares |
| CITADEL ADVISORS LLC | Reduced | $8.7m89.6k shares |
| WOLVERINE TRADING, LLC | New | $3.6m37.5k shares |
| IMC-Chicago, LLC | Reduced | $2.2m22.9k shares |
| JANE STREET GROUP, LLC | New | $1.5m15.7k shares |
| CAPITAL FUND MANAGEMENT S.A. | Reduced | $1.1m11.7k shares |
| PEAK6 LLC | Reduced | $995.9k10.2k shares |
| Walleye Trading LLC | Reduced | $585.8k6.0k shares |
| SIMPLEX TRADING, LLC | Reduced | $429.0k4.4k shares |
| TUDOR INVESTMENT CORP ET AL | Reduced | $380.8k3.9k shares |
Biggest puts
| PEAK6 LLC | Reduced | $10.7m109.6k shares |
| CITADEL ADVISORS LLC | Reduced | $8.5m86.6k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $7.0m71.3k shares |
| JANE STREET GROUP, LLC | Added | $3.2m32.3k shares |
| IMC-Chicago, LLC | Added | $2.5m25.9k shares |
| JPMORGAN CHASE & CO | New | $2.5m25.8k shares |
| D. E. Shaw & Co., Inc. | Reduced | $1.9m19.9k shares |
| SIMPLEX TRADING, LLC | Unchanged | $1.7m17.5k shares |
| WOLVERINE TRADING, LLC | New | $1.3m13.1k shares |
| GROUP ONE TRADING LLC | Reduced | $517.5k5.3k 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 Q3 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 |
|---|---|---|---|---|---|
| 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 | — |
| Q3 2025 | 0 | — | 0 | — | — |
None reported in Q3 2025.
Holders, Q3 2025
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 4.9m $474.9m | Reduced -157.8k |
| VANGUARD GROUP INC 0.01% of their portfolio | 4.2m $408.7m | Reduced -138.2k |
| REINHART PARTNERS, LLC. 5.11% of their portfolio | 1.6m $157.2m | Added +91.8k |
| AMERICAN CENTURY COMPANIES INC 0.07% of their portfolio | 1.3m $131.4m | Reduced -313.7k |
| STATE STREET CORP 0.00% of their portfolio | 1.2m $120.1m | Reduced -18.6k |
| VICTORY CAPITAL MANAGEMENT INC 0.05% of their portfolio | 972.2k $90.2m | Added +85.4k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.24% of their portfolio | 930.4k $90.8m | Added +9.2k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 926.7k $90.5m | Added +1.4k |
| PRIMECAP MANAGEMENT CO/CA/ 0.06% of their portfolio | 833.7k $81.4m | Reduced -18.6k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 769.6k $75.1m | Added +34.2k |
| FMR LLC 0.00% of their portfolio | 551.4k $53.8m | Added +168.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 532.1k $52.0m | Added +3.0k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 494.8k $48.3m | Reduced -96.4k |
| Boston Partners 0.05% of their portfolio | 468.7k $44.9m | Reduced -5.3k |
| Boston Trust Walden Corp 0.33% of their portfolio | 460.3k $44.9m | Reduced -385.6k |
| MORGAN STANLEY 0.00% of their portfolio | 454.1k $44.3m | Reduced -96.1k |
| Grantham, Mayo, Van Otterloo & Co. LLC 0.12% of their portfolio | 443.9k $43.3m | Added +1.8k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 435.0k $42.5m | Reduced -6.7k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 434.8k $42.5m | Added +256.9k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 427.1k $41.7m | Added +20.7k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 410.3k $40.1m | Reduced -293.1k |
| Invesco Ltd. 0.01% of their portfolio | 386.7k $37.8m | Added +246.9k |
| CITIGROUP INC 0.02% of their portfolio | 324.4k $31.7m | Reduced -38.1k |
| LSV ASSET MANAGEMENT 0.07% of their portfolio | 314.9k $30.7m | New |
| BNP PARIBAS FINANCIAL MARKETS 0.02% of their portfolio | 283.9k $27.7m | Added +91.7k |
| MILLENNIUM MANAGEMENT LLC 0.02% of their portfolio | 261.8k $25.6m | Added +154.4k |
| JANUS HENDERSON GROUP PLC 0.01% of their portfolio | 235.4k $23.0m | Added +138.2k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 219.4k $21.4m | Reduced -6.6k |
| FEDERATED HERMES, INC. 0.04% of their portfolio | 217.8k $21.3m | Reduced -3.4k |
| BlackBarn Capital Partners LP 6.37% of their portfolio | 200.0k $19.5m | Reduced -160.0k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 185.3k $18.1m | Reduced -20.4k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.40% of their portfolio | 183.1k $17.9m | Added +49.9k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 168.9k $16.5m | Reduced -252.3k |
| D. E. Shaw & Co., Inc. 0.01% of their portfolio | 154.3k $15.1m | Added +76.1k |
| ROYCE & ASSOCIATES LP 0.14% of their portfolio | 144.7k $14.1m | Reduced -120.3k |
| First Eagle Investment Management, LLC 0.02% of their portfolio | 130.4k $12.7m | Added +57.4k |
| Squarepoint Ops LLC 0.03% of their portfolio | 128.9k $12.6m | Added +28.8k |
| UBS Group AG 0.00% of their portfolio | 127.3k $12.4m | Reduced -70.7k |
| Public Sector Pension Investment Board 0.04% of their portfolio | 122.6k $12.0m | Added +13.0k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 118.1k $11.5m | Reduced -4.2k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio | 117.8k $11.5m | New |
| Allspring Global Investments Holdings, LLC 0.02% of their portfolio | 109.6k $10.4m | Added +102.0k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 96.9k $9.5m | Added +2.1k |
| Clark Capital Management Group, Inc. 0.06% of their portfolio | 96.6k $9.4m | Added +12.0k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.03% of their portfolio | 95.2k $9.3m | Reduced -216.6k |
| Legal & General Group Plc 0.00% of their portfolio | 83.0k $8.1m | Reduced -5.6k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 74.7k $5.0m | Added +51.4k |
| Nuveen, LLC 0.00% of their portfolio | 73.3k $7.2m | Reduced -927 |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 73.0k $7.1m | Added +40.2k |
| Creative Planning 0.01% of their portfolio | 72.6k $7.1m | Added +5.4k |
| Susquehanna Portfolio Strategies, LLC 0.11% of their portfolio | 71.1k $6.9m | Added +3.2k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 69.6k $6.8m | Reduced -1.9k |
| BARCLAYS PLC 0.00% of their portfolio | 69.6k $6.8m | Reduced -8.7k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 66.1k $6.5m | Reduced -45.3k |
| Swiss National Bank 0.00% of their portfolio | 62.3k $6.1m | Added +800 |
| SEGALL BRYANT & HAMILL, LLC 0.08% of their portfolio | 58.6k $5.7m | New |
| PARADIGM CAPITAL MANAGEMENT INC/NY 0.24% of their portfolio | 56.1k $5.5m | Reduced -32.0k |
| GLOBEFLEX CAPITAL L P 0.84% of their portfolio | 56.0k $5.5m | Added +12.5k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 55.2k $5.4m | Reduced -14.8k |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.00% of their portfolio | 54.2k $5.3m | Reduced -300 |
| QSM Asset Management Ltd 3.69% of their portfolio | 53.2k $5.2m | Reduced -7.2k |
| AXA Investment Managers S.A. 0.01% of their portfolio | 52.2k $5.1m | First filing |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 50.2k $4.9m | Reduced -40.4k |
| LPL Financial LLC 0.00% of their portfolio | 49.0k $4.8m | Reduced -5.1k |
| Private Advisor Group, LLC 0.02% of their portfolio | 45.9k $4.5m | Reduced -2.7k |
| HARBOR CAPITAL ADVISORS, INC. 0.34% of their portfolio | 45.0k $4.4m | Reduced -90.6k |
| PRUDENTIAL FINANCIAL INC 0.01% of their portfolio | 44.4k $4.3m | Added +11.0k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 42.7k $4.2m | Added +4.4k |
| ISTHMUS PARTNERS, LLC 0.48% of their portfolio | 42.0k $4.1m | Added +7.8k |
| OSSIAM 0.05% of their portfolio | 40.7k $4.0m | New |
| Schonfeld Strategic Advisors LLC 0.03% of their portfolio | 37.6k $3.7m | Added +17.8k |
| TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio | 37.2k $3.6m | Added +1.3k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 36.7k $3.6m | Reduced -6.7k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.01% of their portfolio | 36.0k $3.5m | Unchanged |
| Verition Fund Management LLC 0.02% of their portfolio | 35.8k $3.5m | Reduced -14.5k |
| Janney Montgomery Scott LLC 0.01% of their portfolio | 35.5k $3.5m | Reduced -3.4k |
| Homestead Advisers Corp 0.08% of their portfolio | 34.2k $3.3m | Unchanged |
| Amundi 0.00% of their portfolio | 34.0k $3.0m | Added +28.7k |
| CANADA LIFE ASSURANCE Co 0.00% of their portfolio | 33.0k $3.2m | Reduced -2.6k |
| BRIDGES INVESTMENT MANAGEMENT INC 0.04% of their portfolio | 31.7k $3.1m | Added +1.9k |
| ALGERT GLOBAL LLC 0.05% of their portfolio | 31.1k $3.0m | Added +14.0k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.06% of their portfolio | 31.0k $3.0m | New |
| Soviero Asset Management, LP 1.87% of their portfolio | 31.0k $3.0m | Reduced -17.0k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 30.1k $2.9m | Added +1 |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 28.6k $2.8m | Reduced -36.9k |
| Jackson Square Partners, LLC 1.08% of their portfolio | 27.3k $2.7m | Reduced -7.7k |
| New Insight Wealth Advisors 0.99% of their portfolio | 27.0k $2.6m | Reduced -4.8k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 26.8k $2.6m | Reduced -227.7k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 25.7k $2.5m | New |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 25.4k $2.5m | Added +2.9k |
| CHASE INVESTMENT COUNSEL CORP 0.69% of their portfolio | 24.0k $2.3m | Unchanged |
| Thrivent Financial for Lutherans 0.00% of their portfolio | 22.7k $2.2m | Reduced -959 |
| Jackson Creek Investment Advisors LLC 0.63% of their portfolio | 22.3k $2.2m | New |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 21.7k $2.1m | Added +882 |
| F/m Investments LLC 0.08% of their portfolio | 21.1k $2.1m | New |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 20.8k $2.0m | Added +6.4k |
| ZACKS INVESTMENT MANAGEMENT 0.02% of their portfolio | 20.2k $2.0m | New |
| Andra AP-fonden 0.02% of their portfolio | 20.0k $2.0m | Added +2.0k |
| SIMPLEX TRADING, LLC 0.04% of their portfolio | 18.9k $1.8m | Added +4.6k |
| MetLife Investment Management, LLC 0.01% of their portfolio | 18.7k $1.8m | New |