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 ($510.6k 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 ≈ $80.44. Options: 10 managers hold calls ($10.1m notional), 9 hold puts ($8.7m).
Trends to Q4 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 |
| Q4 2025 | 372 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| 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 |
| Q4 2025 | 174 | 172 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q1 2025 | $28.5m | $26.1m | 0.91 |
| Q2 2025 | $34.3m | $34.4m | 1.00 |
| Q3 2025 | $30.7m | $40.8m | 1.33 |
| Q4 2025 | $10.1m | $8.7m | 0.85 |
Biggest buyers
| VICTORY CAPITAL MANAGEMENT INC | Added | +835.2k |
| D. E. Shaw & Co., Inc. | Added | +315.9k |
| Balyasny Asset Management L.P. | Added | +241.2k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Added | +160.7k |
| Allspring Global Investments Holdings, LLC | Added | +156.4k |
| CITADEL ADVISORS LLC | Added | +149.2k |
| GOLDMAN SACHS GROUP INC | Added | +135.0k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Added | +125.5k |
| LSV ASSET MANAGEMENT | Added | +114.6k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Added | +94.3k |
Biggest sellers
| BANK OF AMERICA CORP /DE/ | Reduced | -292.1k |
| CITIGROUP INC | Reduced | -213.9k |
| JANUS HENDERSON GROUP PLC | Reduced | -193.6k |
| PRIMECAP MANAGEMENT CO/CA/ | Reduced | -168.7k |
| ROYAL BANK OF CANADA | Reduced | -165.0k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | -149.1k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -131.7k |
| Grantham, Mayo, Van Otterloo & Co. LLC | Reduced | -121.0k |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | -119.9k |
| AMERICAN CENTURY COMPANIES INC | Reduced | -112.1k |
Biggest calls
| CITADEL ADVISORS LLC | Reduced | $3.7m46.3k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $1.8m22.9k shares |
| IMC-Chicago, LLC | Reduced | $1.6m20.1k shares |
| JANE STREET GROUP, LLC | Added | $1.5m18.8k shares |
| TWO SIGMA INVESTMENTS, LP | New | $401.7k5.0k shares |
| Walleye Trading LLC | Reduced | $353.5k4.4k shares |
| TUDOR INVESTMENT CORP ET AL | Reduced | $241.0k3.0k shares |
| Point72 Asset Management, L.P. | New | $216.9k2.7k shares |
| Walleye Capital LLC | Added | $152.6k1.9k shares |
| SIMPLEX TRADING, LLC | Reduced | $88.4k1.1k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $2.6m31.8k shares |
| CITADEL ADVISORS LLC | Reduced | $2.0m25.5k shares |
| IMC-Chicago, LLC | Reduced | $2.0m24.8k shares |
| JPMORGAN CHASE & CO | Reduced | $1.0m12.9k shares |
| JANE STREET GROUP, LLC | Reduced | $650.8k8.1k shares |
| SIMPLEX TRADING, LLC | Reduced | $184.8k2.3k shares |
| Walleye Capital LLC | Reduced | $104.4k1.3k shares |
| Walleye Trading LLC | Reduced | $72.3k900 shares |
| GROUP ONE TRADING LLC | Reduced | $8.0k100 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 Q4 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 |
|---|---|---|---|---|---|
| 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 | — | — |
| Q4 2025 | 0 | — | 2 | $443.5k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-12-17 | Titinger Jorge Director | Sold | $172.1k2.0k shares |
| 2025-12-11 | Blumenstock Gerald M EVP, Research, Dev. & Eng. | Sold | $271.4k3.0k 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, Q4 2025
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 4.8m $387.8m | Reduced -36.6k |
| VANGUARD GROUP INC 0.00% of their portfolio | 4.1m $331.2m | Reduced -63.2k |
| VICTORY CAPITAL MANAGEMENT INC 0.08% of their portfolio | 1.8m $145.2m | Added +835.2k |
| REINHART PARTNERS, LLC. 3.83% of their portfolio | 1.6m $127.7m | Reduced -20.4k |
| AMERICAN CENTURY COMPANIES INC 0.05% of their portfolio | 1.2m $99.1m | Reduced -112.1k |
| STATE STREET CORP 0.00% of their portfolio | 1.2m $95.3m | Reduced -43.9k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.10% of their portfolio | 1.1m $87.7m | Added +160.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 917.7k $73.7m | Reduced -9.0k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 841.0k $67.6m | Added +71.4k |
| PRIMECAP MANAGEMENT CO/CA/ 0.04% of their portfolio | 664.9k $53.4m | Reduced -168.7k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 629.8k $50.6m | Added +135.0k |
| FMR LLC 0.00% of their portfolio | 610.6k $49.1m | Added +59.2k |
| Invesco Ltd. 0.00% of their portfolio | 478.9k $38.5m | Added +92.2k |
| D. E. Shaw & Co., Inc. 0.03% of their portfolio | 470.3k $37.8m | Added +315.9k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 431.2k $34.6m | Added +4.1k |
| LSV ASSET MANAGEMENT 0.08% of their portfolio | 429.5k $34.5m | Added +114.6k |
| Boston Trust Walden Corp 0.26% of their portfolio | 427.7k $34.4m | Reduced -32.6k |
| Boston Partners 0.04% of their portfolio | 422.4k $35.1m | Reduced -46.3k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 405.1k $32.5m | Reduced -29.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 383.1k $30.8m | Reduced -149.1k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 357.5k $28.7m | Reduced -77.3k |
| MORGAN STANLEY 0.00% of their portfolio | 350.2k $28.1m | Reduced -103.9k |
| Grantham, Mayo, Van Otterloo & Co. LLC 0.07% of their portfolio | 322.8k $25.9m | Reduced -121.0k |
| FEDERATED HERMES, INC. 0.04% of their portfolio | 276.3k $22.2m | Added +58.5k |
| Allspring Global Investments Holdings, LLC 0.04% of their portfolio | 266.0k $22.9m | Added +156.4k |
| Balyasny Asset Management L.P. 0.04% of their portfolio | 243.5k $19.6m | Added +241.2k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.06% of their portfolio | 220.7k $17.7m | Added +125.5k |
| UBS Group AG 0.00% of their portfolio | 213.4k $17.1m | Added +86.1k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio | 212.1k $17.0m | Added +94.3k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.35% of their portfolio | 205.7k $16.5m | Added +22.6k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 203.5k $16.4m | Reduced -15.9k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 200.0k $16.1m | Added +14.8k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 176.0k $14.1m | Added +149.2k |
| BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio | 164.0k $13.2m | Reduced -119.9k |
| Squarepoint Ops LLC 0.02% of their portfolio | 153.7k $12.3m | Added +24.8k |
| First Eagle Investment Management, LLC 0.02% of their portfolio | 136.3k $11.0m | Added +6.0k |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 130.1k $10.5m | Reduced -131.7k |
| Public Sector Pension Investment Board 0.04% of their portfolio | 129.8k $10.4m | Added +7.2k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 118.2k $9.5m | Reduced -292.1k |
| ROYCE & ASSOCIATES LP 0.09% of their portfolio | 116.4k $9.3m | Reduced -28.3k |
| CITIGROUP INC 0.01% of their portfolio | 110.5k $8.9m | Reduced -213.9k |
| Clark Capital Management Group, Inc. 0.05% of their portfolio | 110.3k $8.9m | Added +13.7k |
| SEGALL BRYANT & HAMILL, LLC 0.11% of their portfolio | 102.2k $8.2m | Added +43.6k |
| BlackBarn Capital Partners LP 2.78% of their portfolio | 96.6k $7.8m | Reduced -103.4k |
| FIRST TRUST ADVISORS LP 0.01% of their portfolio | 88.4k $7.1m | Added +33.2k |
| NORGES BANK 0.00% of their portfolio | 88.1k $7.1m | Not comparable |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 88.1k $7.1m | Reduced -8.8k |
| ZACKS INVESTMENT MANAGEMENT 0.06% of their portfolio | 88.1k $7.1m | Added +67.9k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 86.1k $6.9m | Reduced -32.1k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 79.8k $6.4m | Added +6.7k |
| JANE STREET GROUP, LLC 0.01% of their portfolio | 79.0k $6.4m | Added +50.4k |
| Legal & General Group Plc 0.00% of their portfolio | 78.1k $6.3m | Reduced -5.0k |
| BARCLAYS PLC 0.00% of their portfolio | 76.0k $6.1m | Added +6.4k |
| Creative Planning 0.00% of their portfolio | 73.5k $5.9m | Added +866 |
| TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio | 71.2k $5.7m | Added +34.1k |
| Nuveen, LLC 0.00% of their portfolio | 70.4k $5.7m | Reduced -2.9k |
| Susquehanna Portfolio Strategies, LLC 0.08% of their portfolio | 68.2k $5.5m | Reduced -2.9k |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 66.9k $5.4m | New |
| Swiss National Bank 0.00% of their portfolio | 61.2k $4.9m | Reduced -1.1k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 61.1k $4.9m | Reduced -5.0k |
| PARADIGM CAPITAL MANAGEMENT INC/NY 0.19% of their portfolio | 56.0k $4.5m | Reduced -100 |
| GLOBEFLEX CAPITAL L P 0.69% of their portfolio | 56.0k $4.5m | Unchanged |
| QSM Asset Management Ltd 2.44% of their portfolio | 53.2k $4.3m | Unchanged |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 52.5k $4.2m | Added +9.8k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 50.5k $4.1m | Added +292 |
| Soviero Asset Management, LP 1.93% of their portfolio | 46.0k $3.7m | Added +15.0k |
| HARBOR CAPITAL ADVISORS, INC. 0.28% of their portfolio | 44.7k $3.6m | Reduced -338 |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 41.8k $3.4m | Reduced -193.6k |
| ISTHMUS PARTNERS, LLC 0.37% of their portfolio | 41.5k $3.3m | Reduced -536 |
| OSSIAM 0.07% of their portfolio | 40.7k $3.3m | Unchanged |
| INTECH INVESTMENT MANAGEMENT LLC 0.03% of their portfolio | 40.5k $3.3m | Added +22.8k |
| F/m Investments LLC 0.12% of their portfolio | 40.3k $3.2m | Added +19.2k |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 39.6k $3.2m | Reduced -4.8k |
| Private Advisor Group, LLC 0.01% of their portfolio | 38.5k $3.1m | Reduced -7.4k |
| BESSEMER GROUP INC 0.00% of their portfolio | 38.0k $3.0m | Added +37.7k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 37.6k $3.0m | Added +930 |
| Amundi 0.00% of their portfolio | 37.3k $3.0m | Added +3.3k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.06% of their portfolio | 36.0k $2.9m | Added +5.0k |
| LPL Financial LLC 0.00% of their portfolio | 34.6k $2.8m | Reduced -14.4k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 34.2k $2.8m | Reduced -35.4k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 33.2k $2.7m | Reduced -41.4k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 30.0k $2.4m | Reduced -101 |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.00% of their portfolio | 29.1k $2.5m | Reduced -25.1k |
| BRIDGES INVESTMENT MANAGEMENT INC 0.03% of their portfolio | 28.4k $2.3m | Reduced -3.3k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 28.0k $2.2m | Added +13.9k |
| AlphaQuest LLC 0.12% of their portfolio | 26.4k $2.1m | Added +12.6k |
| CANADA LIFE ASSURANCE Co 0.00% of their portfolio | 26.3k $2.1m | Reduced -6.7k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 25.9k $2.1m | Added +473 |
| ALGERT GLOBAL LLC 0.03% of their portfolio | 25.3k $2.0m | Reduced -5.8k |
| ABN AMRO INVESTMENT SOLUTIONS 0.03% of their portfolio | 24.8k $2.0m | Added +7.4k |
| BURNEY CO/ 0.06% of their portfolio | 24.7k $2.0m | New |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 24.5k $2.0m | Added +3.7k |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 24.3k $2.0m | Added +2.6k |
| Aquatic Capital Management LLC 0.05% of their portfolio | 22.6k $1.8m | New |
| State of Alaska, Department of Revenue 0.02% of their portfolio | 22.6k $1.8m | Added +6.8k |
| Elo Mutual Pension Insurance Co 0.03% of their portfolio | 22.4k $1.8m | New |
| Janney Montgomery Scott LLC 0.00% of their portfolio | 22.4k $1.8m | Reduced -13.1k |
| Jackson Creek Investment Advisors LLC 0.52% of their portfolio | 22.1k $1.8m | Reduced -245 |
| Thrivent Financial for Lutherans 0.00% of their portfolio | 21.3k $1.7m | Reduced -1.4k |
| Schonfeld Strategic Advisors LLC 0.01% of their portfolio | 21.2k $1.7m | Reduced -16.5k |