Kirby William C. (CIK 1413483) reported 2 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-02-27). Recent activity: Buy TWN (50,687 shares), Buy CBT (486 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-27 | TAIWAN FUND INC (TWN) | Director | Buy | 50,687 | $3.3M |
| 2026-01-12 | CABOT CORP (CBT) | Director | Buy | 486 | $0 |
Source: SEC Form 4 filings · as of 2026-02-27