Kestenberg-Messina Kaitlin M. 4
4 · ADMA BIOLOGICS, INC. · Filed Apr 3, 2026
Research Summary
AI-generated summary of this filing
ADMA BIOLOGICS COO Kaitlin Kestenberg-Messina Withholds Shares for Taxes
What Happened
Kaitlin M. Kestenberg-Messina, Chief Operating Officer and SVP, Compliance at ADMA BIOLOGICS (ADMA), had 20,362 shares withheld to satisfy tax withholding obligations upon the vesting of restricted stock units (RSUs). The shares were valued at $9.11 each, totaling approximately $185,498. This was a tax-withholding/net settlement of RSUs — not an open-market sale.
Key Details
- Transaction date: April 1, 2026; Form 4 filed April 3, 2026 (timely filing).
- Withheld shares: 20,362 at $9.11 per share; total value ≈ $185,498.
- Shares owned after transaction (reported): 161,359 shares of common stock directly owned.
- Unvested RSUs reported (per footnotes): 284,879 unvested RSUs across multiple grants (various vesting schedules).
- Footnote: Code F indicates shares withheld to satisfy mandatory tax withholding on RSU vesting — this is not an open-market sale.
Context
Tax-withholding (net settlement) is a routine administrative step when RSUs vest: the company retains (withholds) a portion of the vested shares to cover taxes rather than the insider selling shares on the market. Such filings do not necessarily indicate buying or selling intent and are common after equity awards vest.
Insider Transaction Report
- Tax Payment
Common Stock
[F1][F2][F3]2026-04-01$9.11/sh−20,362$185,498→ 446,238 total
Footnotes (3)
- [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) 96,160 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) 23,750 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; and (vi) 161,359 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.