MAIA insider transaction filings
MAIA Biotechnology, Inc. — 50 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-09-15. Screen MAIA transaction legs live →
Insider transaction summary — last 90 days
2026-06-25 to 2026-09-23, from the filings listed below: 11 Form 4 filings. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 7 legs across 5 filings by 2 insiders — 258,078 shares, $352,317 total (shares × price as filed).
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 6.
- Largest priced transaction: purchase of 78,239 shares @ $1.39 ($108,752) by Guerrero Ramiro, filed 2026-09-01.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Insider | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|
| Guerrero Ramiro — Director | 5 | 6 legs · 185,078 sh · $252,307 | — | 1 |
| Vitoc Vlad — Chief Executive Officer, Director, 10% owner | 1 | 1 leg · 73,000 sh · $100,010 | — | — |
| CHAOUKI STEVEN M — Director | 1 | — | — | 1 |
| Louie Ngar Yee — Director | 1 | — | — | 1 |
| Luput Cristian — Director | 1 | — | — | 1 |
| Smith Stan — Director | 1 | — | — | 1 |
| Theagene Jean-Manasse — Director | 1 | — | — | 1 |
Recent Form 4 filings — MAIA Biotechnology, Inc.
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-15 | 4 | Vitoc Vlad — Chief Executive Officer, Director, 10% owner | Purchase (P): 73,000 @ $1.37 | EDGAR |
| 2026-09-14 | 4 | Guerrero Ramiro — Director | Purchase (P): 37,595 @ $1.32 | EDGAR |
| 2026-09-01 | 4 | Guerrero Ramiro — Director | Purchase (P): 8,931 @ $1.39 · Purchase (P): 78,239 @ $1.39 · Purchase (P): 46,620 @ $1.35 | EDGAR |
| 2026-08-26 | 4 | Guerrero Ramiro — Director | Purchase (P): 1,794 @ $1.33 | EDGAR |
| 2026-08-24 | 4 | Guerrero Ramiro — Director | Purchase (P): 11,899 @ $1.37 | EDGAR |
| 2026-07-02 | 4 | Guerrero Ramiro — Director | Grant/award (A): 26,355 (derivative) @ $0 | EDGAR |
| 2026-07-02 | 4 | Louie Ngar Yee — Director | Grant/award (A): 32,630 (derivative) @ $0 | EDGAR |
| 2026-07-02 | 4 | Luput Cristian — Director | Grant/award (A): 27,610 (derivative) @ $0 | EDGAR |
| 2026-07-02 | 4 | Smith Stan — Director | Grant/award (A): 32,003 (derivative) @ $0 | EDGAR |
| 2026-07-02 | 4 | Theagene Jean-Manasse — Director | Grant/award (A): 26,355 (derivative) @ $0 | EDGAR |
| 2026-07-02 | 4 | CHAOUKI STEVEN M — Director | Grant/award (A): 26,982 (derivative) @ $0 | EDGAR |
| 2026-06-02 | 4 | Vitoc Vlad — Chief Executive Officer, Director, 10% owner | Purchase (P): 72,700 @ $1.39 | EDGAR |
| 2026-06-02 | 4 | Smith Stan — Director | Purchase (P): 75,000 @ $1.34 | EDGAR |
| 2026-06-02 | 4 | Gryaznov Sergei — Chief Scientific Officer | Purchase (P): 2,000 @ $1.34 | EDGAR |
| 2026-06-01 | 4 | Vitoc Vlad — Chief Executive Officer, Director, 10% owner | Grant/award (A): 800,000 (derivative) @ $0 | EDGAR |
| 2026-06-01 | 4 | Gryaznov Sergei — Chief Scientific Officer | Grant/award (A): 400,000 (derivative) @ $0 | EDGAR |
| 2026-06-01 | 4 | Himmelreich Jeffrey C — Head of Finance | Grant/award (A): 60,000 (derivative) @ $0 | EDGAR |
| 2026-04-14 | 4 | Vitoc Vlad — Chief Executive Officer, Director, 10% owner | Grant/award (A): 800,000 (derivative) @ $0 | EDGAR |
| 2026-04-14 | 4 | Gryaznov Sergei — Chief Scientific Officer | Grant/award (A): 400,000 (derivative) @ $0 | EDGAR |
| 2026-04-14 | 4 | Himmelreich Jeffrey C — Head of Finance | Grant/award (A): 30,000 (derivative) @ $0 | EDGAR |
| 2026-04-02 | 4 | Guerrero Ramiro — Director | Grant/award (A): 27,258 (derivative) @ $0 | EDGAR |
| 2026-04-02 | 4 | Louie Ngar Yee — Director | Grant/award (A): 33,748 (derivative) @ $0 | EDGAR |
| 2026-04-02 | 4 | Luput Cristian — Director | Grant/award (A): 28,556 (derivative) @ $0 | EDGAR |
| 2026-04-02 | 4 | Theagene Jean-Manasse — Director | Grant/award (A): 27,258 (derivative) @ $0 | EDGAR |
| 2026-04-02 | 4 | Smith Stan — Director | Grant/award (A): 33,099 (derivative) @ $0 | EDGAR |
| 2026-04-02 | 4 | CHAOUKI STEVEN M — Director | Grant/award (A): 27,907 (derivative) @ $0 | EDGAR |
| 2026-01-12 | 4 | Smith Stan — Director | Purchase (P): 2,700 @ $3.69 · Gift (G): 20,000 @ $0 | EDGAR |
| 2026-01-05 | 4 | Theagene Jean-Manasse — Director | Grant/award (A): 24,060 (derivative) @ $0 | EDGAR |
| 2026-01-05 | 4 | Smith Stan — Director | Grant/award (A): 29,216 (derivative) @ $0 | EDGAR |
| 2026-01-05 | 4 | Luput Cristian — Director | Grant/award (A): 25,206 (derivative) @ $0 | EDGAR |
| 2026-01-05 | 4 | Louie Ngar Yee — Director | Grant/award (A): 29,789 (derivative) @ $0 | EDGAR |
| 2026-01-05 | 4 | Guerrero Ramiro — Director | Grant/award (A): 24,060 (derivative) @ $0 | EDGAR |
| 2026-01-05 | 4 | CHAOUKI STEVEN M — Director | Grant/award (A): 24,633 (derivative) @ $0 | EDGAR |
| 2025-12-23 | 4 | Smith Stan — Director | Purchase (P): 57,189 @ $1.22 · Purchase (P): 57,189 (derivative) @ $1.36 | EDGAR |
| 2025-12-23 | 4 | Louie Ngar Yee — Director | Purchase (P): 81,699 @ $1.22 · Purchase (P): 81,699 (derivative) @ $1.36 | EDGAR |
| 2025-12-23 | 4 | CHAOUKI STEVEN M — Director | Purchase (P): 40,849 @ $1.22 · Purchase (P): 40,849 (derivative) @ $1.36 | EDGAR |
| 2025-12-09 | 4 | Smith Stan — Director | Purchase (P): 4,580 @ $1.20 · Purchase (P): 4,580 @ $1.19 · Purchase (P): 4,580 @ $1.20 | EDGAR |
| 2025-12-04 | 4/A | Vitoc Vlad — Chief Executive Officer, Director, 10% owner | Purchase (P): 10,500 @ $0.97 | EDGAR |
| 2025-12-04 | 4/A | Vitoc Vlad — Chief Executive Officer, Director, 10% owner | Purchase (P): 22,000 @ $1.05 · Purchase (P): 50,000 @ $1.14 | EDGAR |
| 2025-12-01 | 4 | Vitoc Vlad — Chief Executive Officer, Director, 10% owner | Purchase (P): 50,000 @ $1.14 · Purchase (P): 22,000 @ $1.05 | EDGAR |
| 2025-12-01 | 4 | Luput Cristian — Director | Purchase (P): 20,000 @ $1.08 · Purchase (P): 18,145 @ $1.11 | EDGAR |
| 2025-12-01 | 4 | Smith Stan — Director | Purchase (P): 15,000 @ $1.04 | EDGAR |
| 2025-11-28 | 4 | Luput Cristian — Director | Purchase (P): 10,000 @ $0.98 | EDGAR |
| 2025-11-28 | 4 | Vitoc Vlad — Chief Executive Officer, Director, 10% owner | Purchase (P): 10,500 @ $0.97 | EDGAR |
| 2025-11-26 | 4 | Smith Stan — Director | Purchase (P): 10,000 @ $0.99 · Purchase (P): 15,000 @ $0.98 | EDGAR |
| 2025-11-25 | 4 | Vitoc Vlad — Chief Executive Officer, Director, 10% owner | Purchase (P): 1,800 @ $0.92 · Purchase (P): 10,000 @ $0.99 | EDGAR |
| 2025-10-06 | 4 | Luput Cristian — Director | Grant/award (A): 21,434 (derivative) @ $0 | EDGAR |
| 2025-10-06 | 4 | Louie Ngar Yee — Director | Grant/award (A): 25,331 (derivative) @ $0 | EDGAR |
| 2025-10-06 | 4 | Guerrero Ramiro — Director | Grant/award (A): 20,459 (derivative) @ $0 | EDGAR |
| 2025-10-06 | 4 | CHAOUKI STEVEN M — Director | Grant/award (A): 20,946 (derivative) @ $0 | EDGAR |
Recent 8-K events — MAIA Biotechnology, Inc.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-05-22 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-05-14 | 8-K | 1.02 — Termination of a Material Definitive Agreement | EDGAR |
| 2026-04-16 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-04-08 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-04-02 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-03-31 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-03-27 | 8-K | 7.01 — Regulation FD Disclosure 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-03-04 | 8-K | 1.01 — Entry into a Material Definitive Agreement 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-02-24 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-01-20 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
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