Blumenstock Gerald M — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

Blumenstock Gerald M has filed 4 SEC Form 4 filings across 1 company in the last 90 days — selling. Lifetime open-market sales: $342K.

Recent Transactions

DateTickerCompanyCodeSharesPriceValue
2026-06-16ACLSAXCELIS TECHNOLOGIES INCF — Tax withholding / forfeiture506$191.60$97K
2026-05-22ACLSAXCELIS TECHNOLOGIES INCS — Open-market sale1.2K$152.70$177K
2026-05-19ACLSAXCELIS TECHNOLOGIES INCF — Tax withholding / forfeiture345$155.18$54K
2026-05-19ACLSAXCELIS TECHNOLOGIES INCF — Tax withholding / forfeiture744$155.18$115K
2026-05-19ACLSAXCELIS TECHNOLOGIES INCA — Grant or award2.7K$0.00
2026-05-19ACLSAXCELIS TECHNOLOGIES INCA — Grant or award2.7K$0.00
2026-05-15ACLSAXCELIS TECHNOLOGIES INCS — Open-market sale1.0K$162.31$165K
2026-03-03ACLSAXCELIS TECHNOLOGIES INCF — Tax withholding / forfeiture1.1K$86.58$97K
2025-06-16ACLSAXCELIS TECHNOLOGIES INCF — Tax withholding / forfeiture506$68.96$35K
2025-05-15ACLSAXCELIS TECHNOLOGIES INCF — Tax withholding / forfeiture345$62.67$22K
2025-05-15ACLSAXCELIS TECHNOLOGIES INCA — Grant or award6.1K$0.00
2025-05-15ACLSAXCELIS TECHNOLOGIES INCA — Grant or award6.1K$0.00

Companies — Last 90 Days

Frequently Asked Questions

Who is Blumenstock Gerald M?

Blumenstock Gerald M is a corporate insider — currently tracked as Insider of AXCELIS TECHNOLOGIES INC (ACLS). InsiderAlpha tracks every SEC Form 4 filing in real time.

How many SEC Form 4 filings has Blumenstock Gerald M submitted recently?

4 primary Form 4 filings in the last 90 days, covering 1 company.

Has Blumenstock Gerald M been buying or selling stock?

Recorded transactions: 0 open-market purchases () and 2 open-market sales ($342K) across all tracked filings.

Where can I see all of Blumenstock Gerald M's SEC filings?

All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.

Learn More

Open the live Blumenstock Gerald M profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.