Insider · CIK 0001979418
Gerald M Blumenstock
Files at ACLS (AXCELIS TECHNOLOGIES INC). First filing Dec 12, 2025, latest May 22, 2026.
Gerald M Blumenstock files SEC Form 4 as officer at ACLS (AXCELIS TECHNOLOGIES INC). Since Dec 12, 2025, Gerald M Blumenstock has reported 0 open-market buys worth $0 and 3 open-market sells worth $613k, the latest filed on May 22, 2026.
A track record needs three past buys with six months of prices behind them; Gerald M Blumenstock has 0, so none is measured yet.
The newest scored trade: sold $177k of ACLS on May 21, 2026, filed May 22, 2026, scored 42 (moderate). In the last 12 months: 0 buys worth $0 and 3 sells worth $613k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
ACLS: AXCELIS TECHNOLOGIES INC
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 42Moderate | AXCELIS TECHNOLOGIES INC | $177k 1,161 shares | -5% | +171% from low-11% from high | |
| 41Moderate | AXCELIS TECHNOLOGIES INC | $165k 1,015 shares | -6% | +187% from low-5% from high | |
| 41Moderate | AXCELIS TECHNOLOGIES INC | $271k 3,034 shares | -14% | +110% from low-11% from high |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| May 21, 2026 | ACLS AXCELIS TECHNOLOGIES, INC. | 1,161 0.00% of outstanding | $177k | May 21, 2026 | $165k |
| May 14, 2026 | ACLS AXCELIS TECHNOLOGIES, INC. | 1,015 0.00% of outstanding | $165k | May 14, 2026 | none |
| Dec 11, 2025 | ACLS AXCELIS TECHNOLOGIES, INC. | 3,034 0.01% of outstanding | $271k | Dec 11, 2025 | none |
Transactions
Every row this insider has filed, 14 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Jun 15, 2026 | ACLS AXCELIS TECHNOLOGIES INC | FTax withholding Common Stock | -506 | $191.60 | $97k | 19,987 | Jun 16, 2026 |
| May 21, 2026 | ACLS AXCELIS TECHNOLOGIES INC | SOpen-market sale Common Stock | -1,161 | $152.70 | $177k | 20,493 | May 22, 2026 |
| May 15, 2026 | ACLS AXCELIS TECHNOLOGIES INC | AGrant or award Common Stock | +2,725 | $0.00 | $0 | 20,018 | May 19, 2026 |
| May 15, 2026 | ACLS AXCELIS TECHNOLOGIES INC | AGrant or award Common Stock | +2,725 | $0.00 | $0 | 22,743 | May 19, 2026 |
| May 15, 2026 | ACLS AXCELIS TECHNOLOGIES INC | FTax withholding Common Stock | -744 | $155.18 | $115k | 21,999 | May 19, 2026 |
| May 15, 2026 | ACLS AXCELIS TECHNOLOGIES INC | FTax withholding Common Stock | -345 | $155.18 | $54k | 21,654 | May 19, 2026 |
| May 14, 2026 | ACLS AXCELIS TECHNOLOGIES INC | SOpen-market sale Common Stock | -1,015 | $162.32 | $165k | 17,293 | May 15, 2026 |
| Mar 2, 2026 | ACLS AXCELIS TECHNOLOGIES INC | FTax withholding Common Stock | -1,121 | $86.58 | $97k | 17,540 | Mar 3, 2026 |
| Dec 11, 2025 | ACLS AXCELIS TECHNOLOGIES INC | SOpen-market sale Common Stock | -3,034 | $89.46 | $271k | 18,661 | Dec 12, 2025 |
| Jun 16, 2025 | ACLS AXCELIS TECHNOLOGIES INC | FTax withholding Common Stock | -506 | $68.96 | $35k | 21,695 | Jun 17, 2025 |
| May 15, 2025 | ACLS AXCELIS TECHNOLOGIES INC | AGrant or award Common Stock | +6,148 | $0.00 | $0 | 16,398 | May 19, 2025 |
| May 15, 2025 | ACLS AXCELIS TECHNOLOGIES INC | AGrant or award Common Stock | +6,148 | $0.00 | $0 | 22,546 | May 19, 2025 |
| May 15, 2025 | ACLS AXCELIS TECHNOLOGIES INC | FTax withholding Common Stock | -345 | $62.67 | $22k | 22,201 | May 19, 2025 |
| Feb 28, 2025 | ACLS AXCELIS TECHNOLOGIES INC | FTax withholding Common Stock | -748 | $54.79 | $41k | 10,250 | Mar 4, 2025 |
Questions about Gerald M Blumenstock
Answered from the filings on this page, as of the latest one.
Is Gerald M Blumenstock buying or selling?
In the last 12 months Gerald M Blumenstock reported 0 open-market buys worth $0 and 3 open-market sells worth $613k on SEC Form 4; the latest was sold $177k of ACLS on May 21, 2026. Grants, option exercises and tax withholding are not counted.
How did Gerald M Blumenstock's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Gerald M Blumenstock has 0.
Where does Gerald M Blumenstock file Form 4?
Gerald M Blumenstock has filed Form 4 at ACLS (AXCELIS TECHNOLOGIES INC) as EVP, Research, Dev. & Eng.. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.