| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 15% | $238,676,641 | 4,911,042 | BlackRock, Inc. | 31 Mar 2025 | |||
| VANGUARD GROUP INC | 14% | $213,652,112 | 4,396,134 | The Vanguard Group | 31 Dec 2024 | |||
| REINHART PARTNERS, LLC. | 5.2% | $154,283,702 | 1,589,898 | REINHART PARTNERS, LLC. | 31 Dec 2025 | |||
| AMERICAN CENTURY INVESTMENT MANAGEMENT INC | 4.3% | -18% | $131,400,104 | -$30,629,863 | 1,345,761 | -19% | American Century Investment Management, Inc. | 30 Sep 2025 |
As of 31 Dec 2025, 359 institutional investors reported holding 31,286,464 shares of AXCELIS TECHNOLOGIES INC - Common Stock (ACLS). This represents 102% of the company’s total 30,574,962 outstanding shares.
The largest institutional shareholders of AXCELIS TECHNOLOGIES INC - Common Stock (ACLS) together control 80% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 16% | 4,827,575 | -0.75% | 0.01% | $387,847,360 |
| VANGUARD GROUP INC | 13% | 4,122,529 | -1.5% | 0% | $331,203,980 |
| VICTORY CAPITAL MANAGEMENT INC | 5.9% | 1,807,404 | +86% | 0.08% | $145,206,837 |
| REINHART PARTNERS, LLC. | 5.2% | 1,589,898 | -1.3% | 3.8% | $127,733,577 |
| AMERICAN CENTURY COMPANIES INC | 4% | 1,233,646 | -8.3% | 0.05% | $99,111,119 |
| STATE STREET CORP | 3.9% | 1,186,227 | -3.6% | 0% | $95,301,477 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 3.6% | 1,091,094 | +17% | 0.1% | $87,659,000 |
| GEODE CAPITAL MANAGEMENT, LLC | 3% | 917,747 | -0.97% | 0% | $73,741,718 |
| DIMENSIONAL FUND ADVISORS LP | 2.8% | 841,040 | +9.3% | 0.01% | $67,570,348 |
| PRIMECAP MANAGEMENT CO/CA/ | 2.2% | 664,942 | -20% | 0.04% | $53,421,440 |
| GOLDMAN SACHS GROUP INC | 2.1% | 629,814 | +27% | 0.01% | $50,599,257 |
| FMR LLC | 2% | 610,603 | +11% | 0% | $49,055,805 |
| Invesco Ltd. | 1.6% | 478,897 | +24% | 0.01% | $38,474,584 |
| D. E. Shaw & Co., Inc. | 1.5% | 470,285 | +205% | 0.03% | $37,782,697 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.4% | 431,195 | +0.96% | 0.01% | $34,642,206 |
| LSV ASSET MANAGEMENT | 1.4% | 429,500 | +36% | 0.08% | $34,506,000 |
| Boston Trust Walden Corp | 1.4% | 427,736 | -7.1% | 0.26% | $34,364,310 |
| Boston Partners | 1.4% | 422,435 | -9.9% | 0.04% | $35,065,691 |
| NORTHERN TRUST CORP | 1.3% | 405,146 | -6.9% | 0% | $32,549,430 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.3% | 383,056 | -28% | 0% | $30,776,000 |
| JPMORGAN CHASE & CO | 1.2% | 357,502 | +64% | 0% | $28,721,711 |
| MORGAN STANLEY | 1.1% | 350,220 | -23% | 0% | $28,136,779 |
| Grantham, Mayo, Van Otterloo & Co. LLC | 1.1% | 322,849 | -27% | 0.07% | $25,937,689 |
| FEDERATED HERMES, INC. | 0.9% | 276,266 | +27% | 0.04% | $22,195,210 |
| Allspring Global Investments Holdings, LLC | 0.87% | 266,015 | +143% | 0.04% | $22,909,212 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 31,286,464 | $2,516,688,916 | +$79,550,245 | $80.34 | 359 |
| 2025 Q3 | 30,369,169 | $2,956,545,183 | -$116,315,598 | $97.64 | 355 |
| 2025 Q2 | 31,565,555 | $2,202,316,189 | +$48,333,309 | $69.69 | 325 |
| 2025 Q1 | 31,029,593 | $1,538,370,514 | -$28,923,011 | $49.67 | 300 |
| 2024 Q4 | 30,908,235 | $2,161,421,332 | -$16,178,454 | $69.87 | 320 |
| 2024 Q3 | 30,091,124 | $3,151,601,748 | -$37,557,632 | $104.85 | 362 |
| 2024 Q2 | 30,607,626 | $4,350,568,984 | +$135,949,754 | $142.19 | 382 |
| 2024 Q1 | 29,995,266 | $3,344,516,488 | +$62,297,402 | $111.52 | 377 |
| 2023 Q4 | 29,357,827 | $3,807,055,461 | -$120,248,845 | $129.69 | 417 |
| 2023 Q3 | 29,741,040 | $4,849,220,159 | +$20,824,891 | $163.05 | 418 |
| 2023 Q2 | 29,465,009 | $5,401,368,114 | +$121,426,115 | $183.33 | 401 |
| 2023 Q1 | 29,000,298 | $3,863,375,127 | -$204,971 | $133.25 | 375 |
| 2022 Q4 | 29,119,503 | $2,310,940,929 | +$90,988,492 | $79.36 | 316 |
| 2022 Q3 | 28,398,688 | $1,719,886,261 | +$35,045,318 | $60.56 | 277 |
| 2022 Q2 | 27,743,217 | $1,521,703,980 | +$40,542,722 | $54.84 | 263 |
| 2022 Q1 | 27,062,266 | $2,044,421,467 | -$32,788,741 | $75.53 | 275 |
| 2021 Q4 | 27,540,475 | $2,052,001,785 | -$112,165,409 | $74.56 | 244 |
| 2021 Q3 | 29,085,136 | $1,368,242,181 | +$12,046,305 | $47.03 | 197 |
| 2021 Q2 | 28,851,236 | $1,166,308,282 | -$13,491,490 | $40.42 | 183 |
| 2021 Q1 | 29,166,371 | $1,198,535,654 | +$34,140,637 | $41.09 | 187 |
| 2020 Q4 | 28,479,814 | $829,334,781 | +$8,923,273 | $29.12 | 162 |
| 2020 Q3 | 28,312,135 | $622,926,760 | -$2,926,447 | $22.00 | 166 |
| 2020 Q2 | 28,283,390 | $787,682,223 | -$6,239,364 | $27.85 | 166 |
| 2020 Q1 | 28,687,843 | $525,368,516 | +$9,941,773 | $18.31 | 129 |
| 2019 Q4 | 28,119,574 | $677,705,946 | +$38,898,056 | $24.09 | 130 |
| 2019 Q3 | 26,628,481 | $455,135,544 | -$3,055,362 | $17.09 | 138 |
| 2019 Q2 | 26,890,418 | $404,695,686 | -$3,169,452 | $15.05 | 128 |
| 2019 Q1 | 27,113,742 | $545,543,169 | -$8,717,627 | $20.12 | 141 |
| 2018 Q4 | 27,673,106 | $492,597,108 | +$7,449,145 | $17.80 | 136 |
| 2018 Q3 | 27,096,740 | $532,381,177 | -$21,830,004 | $19.65 | 147 |
| 2018 Q2 | 28,222,214 | $558,847,836 | -$577,586 | $19.80 | 157 |
| 2018 Q1 | 28,073,992 | $690,550,204 | -$17,325,126 | $24.60 | 159 |
| 2017 Q4 | 28,700,108 | $823,659,496 | +$106,498,103 | $28.70 | 170 |
| 2017 Q3 | 25,026,149 | $684,283,569 | +$35,371,517 | $27.35 | 143 |
| 2017 Q2 | 23,956,754 | $501,886,367 | +$36,685,039 | $20.95 | 125 |
| 2017 Q1 | 22,560,447 | $423,876,506 | +$48,062,353 | $18.80 | 94 |
| 2016 Q4 | 21,994,136 | $320,013,702 | +$7,694,242 | $14.55 | 83 |
| 2016 Q3 | 20,462,146 | $271,735,066 | +$654,597 | $13.28 | 76 |
| 2016 Q2 | 20,437,732 | $54,978,752 | +$54,978,752 | $2.69 | 14 |
| 2015 Q4 | 0 | $0 | -$31,228,000 | $89.17 | 0 |
| 2015 Q3 | 11,695,785 | $31,228,000 | +$31,228,000 | $2.67 | 1 |