Kestenberg-Messina Kaitlin M. 4
4 · ADMA BIOLOGICS, INC. · Filed Feb 23, 2026
Research Summary
AI-generated summary of this filing
ADMA BIOLOGICS (ADMA) COO Kaitlin Kestenberg-Messina Sells 8,161 Shares
What Happened
Kaitlin Kestenberg-Messina, COO and SVP Compliance of ADMA BIOLOGICS (ADMA), had 8,161 shares withheld on February 19, 2026 to satisfy mandatory tax withholding upon the vesting of restricted stock units (RSUs). The withheld shares were valued at $16.32 each for a total of $133,188. This transaction is reported with code F — tax withholding — and is not an open-market sale.
Key Details
- Transaction date and price: 2026-02-19, 8,161 shares at $16.32 each, total value $133,188. (Code: F — tax withholding)
- Shares owned after transaction: 205,451 shares of common stock directly owned by the reporting person (per footnote).
- Unvested RSUs: ~366,709 unvested RSUs across several grants (includes 91,631 from 2/9/2026, 58,338 from 2/19/2025, 144,240 from 4/1/2024, 15,000 from 7/24/2023, 47,500 from 3/6/2023, and 10,000 from 3/7/2022); vesting is generally quarterly over four years, subject to continued service.
- Not an open‑market sale: Footnote clarifies shares were withheld by the issuer to cover taxes on vested RSUs (a routine administrative step), not sold on the market.
- Filing timeliness: Report filed 2026-02-23 for a 2026-02-19 transaction; this appears timely (Form 4 due within two business days).
Context
Tax-withholding dispositions (code F) are common when RSUs vest and do not necessarily indicate an insider choosing to sell shares for liquidity or sentiment reasons. For retail investors, outright purchases by insiders tend to be more informative about confidence; routine withholdings mainly reflect tax obligations on compensation.
Insider Transaction Report
Form 4
Kestenberg-Messina Kaitlin M.
COO and SVP, Compliance
Transactions
- Tax Payment
Common Stock
[F1][F2][F3][F4]2026-02-19$16.32/sh−8,161$133,188→ 572,160 total
Footnotes (4)
- [F1]Represents shares withheld by the Issuer to satisfy the mandatory tax withholding requirements upon vesting of restricted stock units ("RSUs"). This is not an open market sale of securities.
- [F2]Includes, as of the transaction date (i) 91,631 unvested RSUs granted on February 9, 2026, vesting quarterly on each annual anniversary of the date of grant over four years, subject to the Reporting Person's continued service as of the applicable vesting date and that will be settled into common stock upon vesting; (ii) 58,338 unvested RSUs out of 77,784 RSUs granted on February 19, 2025, vesting quarterly on each annual anniversary of the date of grant over four years, subject to the Reporting Person's continued service as of the applicable vesting date and that will be settled into common stock upon vesting; (iii) 144,240 unvested RSUs out of 192,320 RSUs granted on April 1, 2024, that will vest in equal quarterly installments on each annual anniversary of the date of grant, over four years, subject to the Reporting Person's continued service as of the applicable vesting date;
- [F3](continued from footnote 2) (iv) 15,000 unvested RSUs out of 30,000 RSUs granted on July 24, 2023, that will vest in equal quarterly installments on each annual anniversary of the date of grant, over four years, subject to the Reporting Person's continued service as of the applicable vesting date; (v) 47,500 unvested RSUs out of 95,000 RSUs granted on March 6, 2023, that will vest in equal quarterly installments on each annual anniversary of the date of grant, over four years, subject to the Reporting Person's continued service as of the applicable vesting date; (vi) 10,000 unvested RSUs out of 40,000 RSUs granted on March 7, 2022, that will vest in equal quarterly installments on each annual anniversary of the date of grant, over four years, subject to the Reporting Person's continued service as of the applicable vesting date;
- [F4](continued from footnote 3) and (vii) 205,451 shares of common stock directly owned by the Reporting Person, which reflects prior option exercises and the prior net settlement upon vesting of previously granted RSUs after the withholding of shares to cover applicable taxes.
Signature
/s/ Kaitlin M. Kestenberg-Messina, by Michael A. Goldstein as Attorney-in-fact|2026-02-23