Insider at

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Insider transactions

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0 buys (P) 0 sells (S) Net: $0 + 5 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

No open-market trades on record; showing all filings.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Aug. 31, 2026 SERA A 117,924 · · 117,924 Direct · Acquired (price as of 2026-10-05)
Aug. 31, 2026 SERA A 169,624 · · 169,624 Direct · Acquired (price as of 2026-10-05)
May 21, 2022 OSUR F 1,996 $5.53 $11,038 96,509 Direct -2.03% Disposed -25.7% (price as of 2026-10-05)
Feb. 1, 2022 OSUR A 29,345 $8.86 $259,997 98,505 Direct +42.43% Acquired -53.6% (price as of 2026-10-05)
Jan. 5, 2022 OSUR A 48,721 $8.21 $399,999 69,160 Direct +238.37% Acquired -49.9% (price as of 2026-10-05)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

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DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
Aug. 31, 2026 SERA Stock Option (right to buy) Class A Common Stock (169,624) $2.12 Aug. 31, 2036 169,624 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 1 holding

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Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
Sept. 20, 2021 OSUR Common Stock [F1] 20,439 Direct