Castagna Michael 4

4 · MANNKIND CORP · Filed Mar 2, 2026

AI-generated summary of this filing

Updated Mar 3, 2026

MannKind CEO Michael Castagna Acquires Shares, Options Vest

What Happened

Michael Castagna, CEO of MannKind Corp (MNKD), acquired shares in two ways: a board-approved purchase of 15,290 shares on March 1, 2026 at $3.27 per share for $49,998, and the acquisition of 145,275 shares on February 26, 2026 resulting from partial vesting of previously granted performance-based options (recorded at $0.00 per share in the filing).

Key Details

Transaction dates and prices:
- 2026-03-01: Purchased 15,290 shares at $3.27 each — total cash outlay $49,998 (through the issuer’s Market Price Stock Purchase Plan; Board approved the purchase).
- 2026-02-26: Acquired 50,000 + 57,750 + 37,525 = 145,275 shares at $0.00 each (derivative acquisitions reflecting partial vesting of performance options granted in 2016–2017).
Shares owned after transaction: Not specified in the provided filing excerpt.
Notable footnotes:
- F1: Purchase executed under the company’s Market Price Stock Purchase Plan (effective May 13, 2023); Board approval noted March 1, 2026.
- F2–F4: The 145,275-share acquisitions reflect partial vesting of options granted May 19, 2016; May 29, 2017; and May 25, 2017 upon achievement of defined performance milestones.
Filing: Form 4 accessioned March 2, 2026 reporting transactions dated Feb 26 and Mar 1, 2026.

Context

The Feb 26 entries are derivative transactions (performance-option vesting), not open-market buys; they represent issuance/conversion tied to achievement of milestones rather than a cash purchase. The March 1 transaction is a direct purchase under the company plan — purchases are often considered more informative to investors than routine option vesting or internal awards. No sales or immediate dispositions were reported in this filing.

Form 4

Period: 2026-02-26

DirectorChief Executive Officer

Transactions

Award
Common Stock, $0.01 Par Value
[F1]
2026-03-01$3.27/sh+15,290$49,998→ 2,475,911 total
Award
Employee Stock Option (right to buy)
[F2]
2026-02-26+50,000→ 50,000 total
Exercise: $4.55From: 2026-02-26Exp: 2026-05-19→ Stock Options (50,000 underlying)
Award
Employee Stock Option (right to buy)
[F3]
2026-02-26+57,750→ 57,750 total
Exercise: $1.52From: 2026-02-26Exp: 2027-05-29→ Stock Options (57,750 underlying)
Award
Employee Stock Option (right to buy)
[F4]
2026-02-26+37,525→ 37,525 total
Exercise: $1.42From: 2026-02-26Exp: 2027-05-25→ Stock Options (37,525 underlying)

Footnotes (4)

[F1]The securities were purchased through the Issuer's Market Price Stock Purchase Plan effective May 13, 2023. The purchase was approved by the Company's Board of Directors on March 1, 2026.
[F2]On May 19, 2016, the reporting person was granted an option that vests upon the achievement of certain defined performance milestones. On February 26, 2026, one of the defined performance milestones was met, resulting in the partial vesting of the option.
[F3]On May 29, 2017, the reporting person was granted an option that vests upon the achievement of certain defined performance milestones. On February 26, 2026, one of the defined performance milestones was met, resulting in the partial vesting of the option.
[F4]On May 25, 2017, the reporting person was granted an option that vests upon the achievement of certain defined performance milestones. On February 26, 2026, one of the defined performance milestones was met, resulting in the partial vesting of the option.

Signature

/s/ Michael Castagna|2026-03-02

1 file