Berkman Charles S
Officer · OABI
As of 2026-09-16, Berkman Charles S has 33 Form 4 transactions on record across 1 company — 14 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Pattern in the record: open-market sales filed in April in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.
Reconstructed holdings
- Direct $483K
- Indirect $0
| OABI | direct | 111,042 sh | $483K |
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-04-07 | OABI | Sale | 7,157 @ $1.49 | $11K | −1.8% of holding | 399,085 | Form 4 |
| 2026-02-18 | OABI | Sale | 9,673 @ $1.71 | $17K | −2.4% of holding | 392,700 | Form 4 |
| 2026-02-17 | OABI | Sale | 6,990 @ $1.70 | $12K | −1.8% of holding | 383,623 | Form 4 |
| 2025-12-08 | OABI | Sale | 8,044 @ $1.96 | $16K | −2.1% of holding | 377,071 | Form 4 |
| 2025-04-07 | OABI | Sale | 7,206 @ $2.00 | $14K | −1.9% of holding | 363,212 | Form 4 |
| 2025-02-19 | OABI | Sale | 7,255 @ $3.67 | $27K | −2.0% of holding | 356,876 | Form 4 |
| 2025-02-18 | OABI | Sale | 8,215 @ $3.68 | $30K | −2.2% of holding | 364,131 | Form 4 |
| 2025-01-21 | OABI | Sale | 25,489 @ $3.24 | $83K | −6.9% of holding | 343,190 | Form 4 |
| 2024-12-09 | OABI | Sale | 8,022 @ $4.13 | $33K | −2.4% of holding | 323,385 | Form 4 |
24 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-04-07 | OABI | Option exercise | 13,542 | 111,042 | Form 4 |
| 2026-04-07 | OABI | Option exercise | 13,542 | 406,242 | Form 4 |
| 2026-02-18 | OABI | Option exercise | 18,750 | 402,373 | Form 4 |
| 2026-02-18 | OABI | Award / grant | 600,000 | 600,000 | Form 4 |
| 2026-02-18 | OABI | Award / grant | 60,000 | 124,584 | Form 4 |
| 2026-02-18 | OABI | Option exercise | 18,750 | 64,584 | Form 4 |
| 2026-02-16 | OABI | Option exercise | 13,542 | 390,613 | Form 4 |
| 2026-02-16 | OABI | Option exercise | 13,542 | 83,334 | Form 4 |
| 2025-12-07 | OABI | Option exercise | 15,621 | 385,115 | Form 4 |
| 2025-12-07 | OABI | Option exercise | 15,621 | 96,876 | Form 4 |
| 2025-04-07 | OABI | Option exercise | 13,542 | 370,418 | Form 4 |
| 2025-04-07 | OABI | Option exercise | 13,542 | 112,497 | Form 4 |
| 2025-02-18 | OABI | Award / grant | 337,500 | 337,500 | Form 4 |
| 2025-02-18 | OABI | Award / grant | 56,250 | 126,039 | Form 4 |
| 2025-02-16 | OABI | Option exercise | 13,541 | 69,789 | Form 4 |
| 2025-02-16 | OABI | Option exercise | 13,541 | 372,346 | Form 4 |
| 2025-02-16 | OABI | Option exercise | 13,541 | 372,346 | Form 4 |
| 2025-02-15 | OABI | Option exercise | 15,615 | 83,330 | Form 4 |
| 2025-02-15 | OABI | Option exercise | 15,615 | 358,805 | Form 4 |
| 2025-02-15 | OABI | Option exercise | 15,615 | 358,805 | Form 4 |
| 2025-01-17 | OABI | Award / grant | 45,294 | 368,679 | Form 4 |
| 2024-12-07 | OABI | Option exercise | 15,621 | 98,945 | Form 4 |
| 2024-12-07 | OABI | Option exercise | 15,621 | 331,407 | Form 4 |
| 2024-12-07 | OABI | Option exercise | 15,621 | 331,407 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.