Tzu Yin Chiu

Tzu Yin Chiu: Director at Axcelis Technologies. What Tzu Yin Chiu 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)

Tzu Yin Chiu holds 11,843 Axcelis Technologies shares (0.04% of the company), worth about $1.5M at the last price, according to the Form 4 of May 15, 2026.

• Shares held: 11,843 (0.04%), $1.5M — Held in their own name.

Declarations

• Axcelis Technologies (ACLS) — Form 4 of May 15, 2026: grant or award of 1,440; 11,843 shares after 0001738290-26-000003
• Axcelis Technologies (ACLS) — Form 4 of May 15, 2025: grant or award of 3,586; 10,403 shares after 0001415889-25-013220

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.

All holders · Who owns each AI company · All tracked companies · The AI market