Axcelis Technologies, Inc. (ACLS) Insider Trading
Over the last 3 months, ACLS insiders made 0 open-market buys and 17 sales, a net sale of -$5.5M (SEC Form 4). Over the last 6 months, 236 institutions increased and 258 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
17
Net (3m)
-$5.5M
Insider trades by month Buys Sells
Dec
Feb
Mar
Apr
May
Jun
Context3-month price +103.5%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 17, 2026 | Ryzhik Davidofficer: SVP Interim CFO | Tax | 76 | $176.84 |
| Jun 16, 2026 | Blumenstock Gerald Mofficer: EVP, Research, Dev. & Eng. | Tax | 506 | $191.60 |
| Jun 4, 2026 | Sayiner Necipdirector | Sell | 1,586 | $157.44 |
| May 28, 2026 | Sutton Toddofficer: VP Corporate Controller | Sell | 2,000 | $159.99 |
| May 26, 2026 | St Dennis Thomasdirector | Sell | 900 | $155.37 |
| May 22, 2026 | Blumenstock Gerald Mofficer: EVP, Research, Dev. & Eng. | Sell | 1,161 | $152.70 |
| May 22, 2026 | Evans Eileenofficer: EVP, General Counsel and Sec'y | Sell | 926 | $155.51 |
| May 21, 2026 | Tatnall Christopherofficer: EVP Global Customer Operations | Sell | 1,166 | $149.75 |
| May 20, 2026 | KURTZWEIL JOHN Tdirector | Sell | 3,500 | $138.79 |
| May 20, 2026 | GRAVES GREGORY Bdirector | Sell | 2,625 | $141.41 |
| May 20, 2026 | GRAVES GREGORY Bdirector | Sell | 600 | $142.51 |
| May 20, 2026 | Mahoney Robert Johnofficer: EVP Global Operations | Tax | 182 | $146.24 |
| May 20, 2026 | Sutton Toddofficer: VP Corporate Controller | Tax | 184 | $146.24 |
| May 20, 2026 | Quirk Jeannedirector | Sell | 1,789 | $140.22 |
| May 20, 2026 | Redinbo Gregofficer: EVP MARKETING AND APPLICATIONS | Tax | 111 | $146.24 |
| May 20, 2026 | Redinbo Gregofficer: EVP MARKETING AND APPLICATIONS | Tax | 79 | $146.24 |
| May 20, 2026 | Low Russelldirector, officer: PRESIDENT AND CEO | Tax | 711 | $146.24 |
| May 20, 2026 | Mahoney Robert Johnofficer: EVP Global Operations | Tax | 130 | $146.24 |
| May 19, 2026 | Sutton Toddofficer: VP Corporate Controller | Grant | 1,168 | — |
| May 19, 2026 | Tatnall Christopherofficer: EVP Global Customer Operations | Tax | 345 | $155.18 |
| May 19, 2026 | Evans Eileenofficer: EVP, General Counsel and Sec'y | Grant | 3,893 | — |
| May 19, 2026 | Low Russelldirector, officer: PRESIDENT AND CEO | Grant | 19,466 | — |
| May 19, 2026 | Ryzhik Davidofficer: SVP Interim CFO | Grant | 3,115 | — |
| May 19, 2026 | Low Russelldirector, officer: PRESIDENT AND CEO | Tax | 1,453 | $155.18 |
| May 19, 2026 | Mahoney Robert Johnofficer: EVP Global Operations | Tax | 61 | $155.18 |
| May 19, 2026 | Tatnall Christopherofficer: EVP Global Customer Operations | Tax | 170 | $155.18 |
| May 19, 2026 | Redinbo Gregofficer: EVP MARKETING AND APPLICATIONS | Grant | 3,115 | — |
| May 19, 2026 | Mahoney Robert Johnofficer: EVP Global Operations | Grant | 1,947 | — |
| May 19, 2026 | Tatnall Christopherofficer: EVP Global Customer Operations | Tax | 744 | $155.18 |
| May 19, 2026 | Blumenstock Gerald Mofficer: EVP, Research, Dev. & Eng. | Grant | 2,725 | — |
Source: ACLS SEC Form 4 filings, latest Jun 17, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their ACLS positions over the last 6 months (SEC Form 13F).
Increased
236
New positions
128
Reduced
258
Sold out
104
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Increased | 4.9M | May 13, 2026 |
| BLACKROCK, INC. | Reduced | 4.8M | Feb 12, 2026 |
| VANGUARD GROUP INC | Reduced | 4.1M | Jan 29, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 2.8M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 2.5M | May 8, 2026 |
| FMR LLC | Increased | 2.4M | May 15, 2026 |
| VICTORY CAPITAL MANAGEMENT INC | Increased | 1.8M | Feb 13, 2026 |
| REINHART PARTNERS, INC. | Increased | 1.7M | Apr 13, 2026 |
| REINHART PARTNERS, INC. | Reduced | 1.6M | Feb 10, 2026 |
| BALYASNY ASSET MANAGEMENT L.P. | Increased | 1.4M | May 15, 2026 |
| VICTORY CAPITAL MANAGEMENT INC | Reduced | 1.3M | May 15, 2026 |
| AMERICAN CENTURY COMPANIES INC | Reduced | 1.2M | Feb 13, 2026 |
| STATE STREET CORP | Increased | 1.2M | May 15, 2026 |
| STATE STREET CORP | Reduced | 1.2M | Feb 13, 2026 |
| BNP PARIBAS ASSET MANAGEMENT HOLDING S.A. | Increased | 1.1M | Feb 13, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.