Chan Mary S
Director · SBAC
As of 2026-09-16, Chan Mary S has 34 Form 4 transactions on record across 1 company — 17 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.
Reconstructed holdings
- Direct $199K
- Indirect $0
| SBAC | direct | 1,108 sh | $199K |
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 |
|---|---|---|---|---|---|---|---|
| 2025-02-28 | SBAC | Sale | 1,411 @ $218.07 | $308K | −21.6% of holding | 5,131 | Form 4 |
33 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-05-22 | SBAC | Award / grant | 1,108 | 1,108 | Form 4 |
| 2026-05-01 | SBAC | Withheld for tax | 326 | 6,422 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 248 | 0 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 331 | 6,748 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 302 | 6,417 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 302 | 302 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 248 | 6,115 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 331 | 663 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 302 | 302 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 248 | 0 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 331 | 6,748 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 302 | 6,417 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 248 | 6,115 | Form 4 |
| 2026-05-01 | SBAC | Option exercise | 331 | 663 | Form 4 |
| 2026-04-13 | SBAC | Withheld for tax | 1,453 | 5,867 | Form 4 |
| 2026-04-13 | SBAC | Option exercise | 1,501 | 7,320 | Form 4 |
| 2026-04-13 | SBAC | Option exercise | 1,501 | 0 | Form 4 |
| 2025-05-23 | SBAC | Award / grant | 994 | 994 | Form 4 |
| 2025-05-01 | SBAC | Withheld for tax | 268 | 5,685 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 302 | 604 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 248 | 248 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 175 | 0 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 175 | 5,403 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 248 | 248 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 175 | 0 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 302 | 604 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 302 | 5,953 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 248 | 5,651 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 302 | 5,953 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 248 | 5,651 | Form 4 |
| 2025-05-01 | SBAC | Option exercise | 175 | 5,403 | Form 4 |
| 2025-02-28 | SBAC | Option exercise | 1,411 | 6,542 | Form 4 |
| 2025-02-28 | SBAC | Option exercise | 1,411 | 0 | 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.