Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Tzu Yin Chiu files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Russell Low - $1.57M in ACLS purchases and sales in the last 12 months
- Todd Sutton - $742K in ACLS purchases and sales in the last 12 months
- Robert John Mahoney - $543K in ACLS purchases and sales in the last 12 months
- John T. Kurtzweil - $486K in ACLS purchases and sales in the last 12 months
- Greg Redinbo - $464K in ACLS purchases and sales in the last 12 months
- Gregory B. Graves - $457K in ACLS purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
- Christine Chivily
- Pad Chivukula
- Bruce R. Chizen
- Gerald M. Chizever
- Stefan Chkautovich
- CHLM Sponsor-5 LLC
- Chloe R. Seelbach, Trustee UAD 2/2/05 The Taplin Elizabeth Seelbach Trust
- Chloe R. Seelbach, Trustee under Claiborne Rankin Trust for Children of Chloe R. Seelbach DTD 12/21/04 FBO Isabelle Scott Seelbach
Frequently asked questions
Who is Tzu Yin Chiu?
Tzu Yin Chiu is a corporate insider of AXCELIS TECHNOLOGIES INC (ACLS). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Tzu Yin Chiu last file a Form 4?
The most recent primary Form 4 on record is dated 18 May 2026, one of 2 filings going back to 2025.
