Latest Period
Q2 2026
Security Snapshot
AXCELIS TECHNOLOGIES INC - COMMON STOCK (ACLS) Institutional Ownership
CUSIP: 054540208
13F Institutional Holders and Ownership History from Q3 2015 to Q2 2026
Institutions Reporting
432
Shares (Excl. Options)
30,828,443
Price
$189.45
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- Security type / class
- Equity / COMMON STOCK
- Symbol
- ACLS on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 30,828,443
- Total 13F value
- $5,835,464,867
- Portfolio coverage rank
- 0%
- Share change
- -1,545,375
- Value change
- -$224,722,300
- Number of holders
- 432
- Shares outstanding
- 30,764,195
- SEC-reported price per share
- $144.50
- Insider filing price
- $144.50
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- ACLS - AXCELIS TECHNOLOGIES INC - COMMON STOCK is tracked under CUSIP 054540208.
- 432 institutions reported positions in Q2 2026.
- 6 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 375 to 432 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $3,029,013,571 to $5,835,464,867.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 432 institutions filings for Q2 2026.
Security key
054540208
Latest holder period
Q2 2026
13F holders
432
13D/G owners
6
CIK / CUSIP context first
Open Q2 2026 holders
ACLS full holder history
AXCELIS TECHNOLOGIES INC SEC filings
AXCELIS TECHNOLOGIES INC company facts
AXCELIS TECHNOLOGIES INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 054540208:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
6
Security
ACLS
| 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 | |||
| FMR LLC | 13% | +19% | $595,687,101 | +$92,934,597 | 4,122,402 | +18% | FMR LLC | 30 Jun 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 8.1% | $232,826,496 | 2,501,359 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.3% | $150,540,239 | 1,617,321 | Vanguard Capital Management | 31 Mar 2026 | |||
| 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 |
| REINHART PARTNERS, LLC. | 3% | -44% | $175,934,916 | -$125,271,737 | 928,660 | -42% | REINHART PARTNERS, LLC. | 30 Jun 2026 |
As of 30 Jun 2026, 432 institutional investors reported holding 30,828,443 shares of AXCELIS TECHNOLOGIES INC - COMMON STOCK (ACLS). This represents 100% of the company’s total 30,764,195 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
80%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 16% | 5,029,462 | +1.9% | 0.01% | $952,831,502 |
| FMR LLC | 13% | 4,125,902 | +70% | 0.03% | $781,652,150 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 8.1% | 2,478,878 | -0.38% | 0.02% | $469,623,437 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.5% | 1,386,518 | +0.27% | 0.01% | $262,675,835 |
| STATE STREET CORP | 4% | 1,231,109 | +3.5% | 0.01% | $233,178,562 |
| VICTORY CAPITAL MANAGEMENT INC | 3.7% | 1,134,007 | -11% | 0.12% | $214,837,627 |
| REINHART PARTNERS, LLC. | 3% | 928,660 | -44% | 4% | $175,937,874 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.7% | 833,607 | +2.8% | 0.01% | $157,956,036 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 2.6% | 803,151 | -20% | 0.15% | $152,156,957 |
| DIMENSIONAL FUND ADVISORS LP | 2.3% | 709,266 | -16% | 0.02% | $134,347,548 |
| Balyasny Asset Management L.P. | 2% | 616,196 | -55% | 0.21% | $116,738,332 |
| PRIMECAP MANAGEMENT CO/CA/ | 2% | 610,451 | -7.3% | 0.07% | $115,649,942 |
| Invesco Ltd. | 1.7% | 527,724 | +220% | 0.01% | $99,977,311 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.4% | 416,230 | -6.6% | 0.01% | $78,854,774 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.3% | 394,455 | +8.9% | 0.01% | $74,730,000 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | 1.3% | 392,240 | +688040% | 0.23% | $74,309,868 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | 1.2% | 383,760 | -22% | 0.06% | $72,703,332 |
| NORTHERN TRUST CORP | 1.2% | 382,027 | -8.3% | 0.01% | $72,375,015 |
| AMERICAN CENTURY COMPANIES INC | 1.2% | 369,879 | -61% | 0.03% | $70,073,577 |
| MORGAN STANLEY | 1.2% | 366,076 | -37% | 0% | $69,353,587 |
| Boston Trust Walden Corp | 1.2% | 359,256 | -5.1% | 0.52% | $68,061,049 |
| EMERALD ADVISERS, LLC | 1.1% | 330,469 | +243% | 1.5% | $62,607,352 |
| UBS Group AG | 1% | 320,891 | -15% | 0.01% | $60,792,800 |
| Boston Partners | 0.99% | 303,929 | -11% | 0.05% | $55,651,466 |
| GOLDMAN SACHS GROUP INC | 0.76% | 235,253 | -53% | 0% | $44,568,681 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
43
Latest
Q2 2026
Rows shown
1-25 of 43
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 30,828,443 | $5,835,464,867 | -$224,722,300 | $189.45 | 432 |
| 2026 Q1 | 32,548,345 | $3,029,013,571 | +$131,544,749 | $93.08 | 375 |
| 2025 Q4 | 31,303,011 | $2,518,025,341 | +$79,659,127 | $80.34 | 370 |
| 2025 Q3 | 30,365,084 | $2,956,146,323 | -$116,317,648 | $97.64 | 354 |
| 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 |