Plavsic Mark 4

4 · Aura Biosciences, Inc. · Filed Mar 3, 2026

AI-generated summary of this filing

Updated Mar 3, 2026

Aura Biosciences CTO Mark Plavsic Receives 175,000 Share Awards

What Happened

Mark Plavsic, Chief Technology Officer of Aura Biosciences (AURA), received two awards on March 2, 2026 totaling 175,000 shares: 62,339 shares via RSUs and 112,661 shares as a derivative award. Both were reported with an acquisition price of $0.00 (awards/grants), i.e., compensation grants rather than open-market purchases or sales.

Key Details

Transaction date: 2026-03-02; Form 4 filed: 2026-03-03.
Items granted: 62,339 RSUs (acquisition code A) and 112,661 derivative shares/options (acquisition code A); both at $0.00 per share (total reported value $0).
Shares owned after the transaction: not specified in the filing.
Footnotes from the filing:
- F1: The 62,339 RSUs each convert to one share and vest in four substantially equal annual installments beginning Jan 15, 2027, subject to continued service.
- F2: The derivative award vests 25% on Feb 1, 2027, with the remainder vesting pro rata over 36 monthly installments, subject to continued service.
Filing timeliness: Form 4 was filed the day after the reported grants (not indicated as late in the filing).

Context

These grants are typical equity compensation intended to retain and incentivize executives. RSUs convert to shares as they vest; the derivative award appears to be an option-style grant subject to vesting and is not immediately exercisable.
Because these were awards (not purchases or sales), they do not reflect an immediate personal cash investment or liquidation by the insider.

Form 4

Period: 2026-03-02

Chief Technology Officer

Transactions

Award
Common Stock
[F1]
2026-03-02+62,339→ 243,736 total
Award
Stock Option (Right to Buy)
[F2]
2026-03-02+112,661→ 112,661 total
Exercise: $6.14Exp: 2036-03-02→ Common Stock (112,661 underlying)

Footnotes (2)

[F1]These shares were acquired pursuant to a restricted stock unit ("RSU") award under the Issuer's 2021 Stock Option and Incentive Plan. Each RSU represents the right to receive one share of the Issuer's Common Stock. These RSUs vest in four substantially equal annual installments beginning on January 15, 2027, subject to the Reporting Person's continued service as of each such vesting date.
[F2]The shares underlying this option vest as follows: 25% of the shares vest on February 1, 2027 with the remainder vesting thereafter pro-rata in 36 monthly installments, subject to the Reporting Person's continued service as of each such vesting date.

Signature

/s/ Conor Kilroy, as Attorney-in-Fact|2026-03-03

1 file