Security key
054540208
AXCELIS TECHNOLOGIES INC - Common Stock (ACLS)
CUSIP: 054540208
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 30,365,084
- Total 13F value
- $2,956,146,323
- Share change
- -1,274,902
- Put/Call ratio
- 103%
- SEC-reported price per share
- $97.64
- Number of holders
- 354
- Value change
- -$116,317,648
- Number of buys
- 173
- Number of sells
- 155
- Shares outstanding
- 30,955,333
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
354
Top holders
10
ACLS full security history
Ownership snapshot
Full 13F holder table
AXCELIS TECHNOLOGIES INC SEC filings
AXCELIS TECHNOLOGIES INC company facts
Broader feeds
Ownership snapshot
Top reported holders of ACLS - AXCELIS TECHNOLOGIES INC - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
30 Sep 2025
13F
13D/G
Lead comparable stake: 15%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 15%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
15%
AMERICAN CENTURY INVESTMENT MANAG...
4.3%
VANGUARD GROUP INC
14%
AMERICAN CENTURY COMPANIES INC
5.4%
REINHART PARTNERS, LLC.
4.9%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
15%
from 13D/G
|
$349,979,452
5,021,946 shares
|
— | 30 Jun 2025 |
| AMERICAN CENTURY INVESTMENT MANAGEMENT INC |
13D/G
|
4.3%
|
$131,400,104
1,345,761 shares
|
-$30,629,863 | 30 Sep 2025 |
| VANGUARD GROUP INC |
13F
Company
|
14%
|
$301,336,006
4,323,949 shares
|
— | 30 Jun 2025 |
| AMERICAN CENTURY COMPANIES INC |
13F
Company
|
5.4%
|
$115,647,976
1,659,463 shares
|
— | 30 Jun 2025 |
| REINHART PARTNERS, LLC. |
13F
Company
|
4.9%
|
$105,828,276
1,518,544 shares
|
— | 30 Jun 2025 |
| STATE STREET CORP |
13F
Company
|
4%
|
$87,022,461
1,248,708 shares
|
— | 30 Jun 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
354
Shares
30,365,084
Rows available
354
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
325
Q3 2025 holders
354
Holder diff
29
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|