Gerald M. Blumenstock
Gerald M. Blumenstock: EVP, Research, Dev. & Eng. at Axcelis Technologies. What Gerald M. Blumenstock holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
Axcelis Technologies (ACLS)
Gerald M. Blumenstock holds 19,987 Axcelis Technologies shares (0.06% of the company), worth about $2.6M at the last price, according to the Form 4 of Jun 15, 2026.
- Shares held: 19,987 (0.06%), $2.6M — Held in their own name.
Declarations
- Axcelis Technologies (ACLS) — Form 4 of Jun 15, 2026 (EVP, Research, Dev. & Eng.): shares withheld for tax of 506 at $191.60; 19,987 shares after 0001979418-26-000010
- Axcelis Technologies (ACLS) — Form 4 of May 21, 2026 (EVP, Research, Dev. & Eng.): open-market sale of 1,161 at $152.70; 20,493 shares after 0001979418-26-000008
- Axcelis Technologies (ACLS) — Form 4 of May 15, 2026 (EVP, Research, Dev. & Eng.): grant or award of 2,725; grant or award of 2,725; 21,654 shares after 0001979418-26-000006
- Axcelis Technologies (ACLS) — Form 4 of May 14, 2026 (EVP, Research, Dev. & Eng.): open-market sale of 1,015 at $162.32; 17,293 shares after 0001979418-26-000004
- Axcelis Technologies (ACLS) — Form 4 of Mar 2, 2026 (EVP, Research, Dev. & Eng.): shares withheld for tax of 1,121 at $86.58; 17,540 shares after 0001979418-26-000002
- Axcelis Technologies (ACLS) — Form 4 of Dec 11, 2025 (EVP, Research, Dev. & Eng.): open-market sale of 3,034 at $89.46; 18,661 shares after 0001979418-25-000004
- Axcelis Technologies (ACLS) — Form 4 of Jun 16, 2025 (EVP, Research, Dev. & Eng.): shares withheld for tax of 506 at $68.96; 21,695 shares after 0001415889-25-017561
- Axcelis Technologies (ACLS) — Form 4 of May 15, 2025 (EVP, Research, Dev. & Eng.): grant or award of 6,148; grant or award of 6,148; 22,201 shares after 0001415889-25-013643
- Axcelis Technologies (ACLS) — Form 4 of Feb 28, 2025 (EVP, Research, Dev. & Eng.): shares withheld for tax of 748 at $54.79; 10,250 shares after 0001415889-25-006551
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.
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