Tzu Yin Chiu
CIK 1738290 · last filed 2026-05-18
Tzu Yin Chiu is a corporate insider who has filed 13 SEC Form 4 insider transactions across 1 company since 2018. The most recent filing, for ACLS, was dated May 18, 2026. Across all open-market trades the lifetime net is −$3.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $2.1M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$2.13M
1
13
-$3.34M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ACLS | Director | 11,843 | $180.12 | $2.13M | -$3.34M | 13 | 2026-05-18 |
Recent Filings
13 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-18 | ACLS | Grant (A) | +1,440 | $0 | EDGAR |
| 2025-05-15 | ACLS | Grant (A) | +3,586 | $0 | EDGAR |
| 2024-05-16 | ACLS | Grant (A) | +1,662 | $0 | EDGAR |
| 2024-05-15 | ACLS | Grant (A) | +1,162 | $0 | EDGAR |
| 2023-05-16 | ACLS | Sell (S) | −15,000 | -$1.94M | EDGAR |
| 2023-05-15 | ACLS | Grant (A) | +1,282 | $0 | EDGAR |
| 2023-05-09 | ACLS | Sell (S) | −10,000 | -$1.19M | EDGAR |
| 2023-02-14 | ACLS | Sell (S) | −1,700 | -$216.1K | EDGAR |
| 2022-05-16 | ACLS | Grant (A) | +2,689 | $0 | EDGAR |
| 2021-05-17 | ACLS | Grant (A) | +3,497 | $0 | EDGAR |