Axcelis Technologies, Inc. (ACLS)
Nasdaq: ACLS · Special Industry Machinery, NEC · Beverly, MA · filing with the SEC since 2000
Grade5.7
◀ Past 6.7● Present 6.2▶ Future 4.1
Who owns Axcelis Technologies, Inc.
As filed with the SECHolders of 5% or more
4
Blackrock, Inc. holds 15.3% of Common Stock, as its SCHEDULE 13G/A filed Apr 29, 2025 says.
Directors and officers
16
report now, of 29 people on the record since 2006. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 4 named at left.
Holders of 5% or moreshare of the class, as filed
Blackrock, Inc.
SCHEDULE 13G/A · filed Apr 29, 2025 · Common Stock
Fmr LLC
SCHEDULE 13G/A · filed Aug 6, 2026 · COMMON STOCK · 11.3% in May 7, 2026
Vanguard Portfolio Management
SCHEDULE 13G · filed Apr 28, 2026 · Common Stock
Vanguard Capital Management
SCHEDULE 13G · filed Apr 29, 2026 · Common Stock
American Century Investment Management, Inc.
SCHEDULE 13G/A · filed Nov 14, 2025 · Common Stock · reported falling below 5%, from 5.2% in Aug 14, 2025
Reinhart Partners, LLC.
SCHEDULE 13G/A · filed Jul 14, 2026 · Common Stock · reported falling below 5%, from 5.2% in Feb 12, 2026
The Vanguard Group
SCHEDULE 13G/A · filed Mar 26, 2026 · Common Stock · reported falling below 5%, from 13.5% in Jan 30, 2025
What ACLS reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Veeco Instruments Inc
An entity · legal entity · owns, named in the 10-K filed Feb 26, 2026
8 subsidiaries in 8 countries, from the list filed with the 10-K filed Feb 26, 2026.
Insider tradesForm 4
23sales
0purchases
4sales on a scheduled plan
13people selling
$6.4Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window13 of 29 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Low Russell | PRESIDENT AND CEO | 4 | $1.6M | 4 | 0 | $0 |
| Sutton Todd | VP Corporate Controller | 2 | $700,000 | 0 | 0 | $0 |
| Blumenstock Gerald M | EVP, Research, Dev. & Eng. | 3 | $600,000 | 0 | 0 | $0 |
| Titinger Jorge | director | 3 | $600,000 | 0 | 0 | $0 |
| Redinbo Greg | EVP and Chief Strategy Officer | 1 | $500,000 | 0 | 0 | $0 |
| Mahoney Robert John | EVP Global Operations | 2 | $500,000 | 0 | 0 | $0 |
| Graves Gregory B | director | 2 | $500,000 | 0 | 0 | $0 |
| Kurtzweil John T | director | 1 | $500,000 | 0 | 0 | $0 |
| Quirk Jeanne | director | 1 | $300,000 | 0 | 0 | $0 |
| Tatnall Christopher | EVP Global Customer Operations | 1 | $200,000 | 0 | 0 | $0 |
| Sayiner Necip | director | 1 | $200,000 | 0 | 0 | $0 |
| Evans Eileen | EVP, General Counsel and Sec'y | 1 | $100,000 | 0 | 0 | $0 |
| St Dennis Thomas | director | 1 | $100,000 | 0 | 0 | $0 |