Insider transactions

Nathaniel Sisitsky

CIK 1225738 · Chief Legal Officer · last filed 2026-04-22

Nathaniel Sisitsky is a Chief Legal Officer who has filed 18 SEC Form 4 insider transactions across 3 companies since 2018. The most recent filing, for QDEL, was dated Apr 22, 2026. Current disclosed insider exposure totals $501.6K across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure
$501.6K
Companies
3
Total Filings
18
Lifetime Open-Market Net
$0

Charts

Trading activity, where the exposure sits, and each trade against the stock price.

Filer Profile

Reported Address
C/O QUIDELORTHO CORPORATION
9975 SUMMERS RIDGE ROAD
SAN DIEGO, CA 92121
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
QDEL Chief Legal Officer — $11.78 — $0 1 2026-04-22
STAA Chief Legal Officer 22,812 $21.99 $501.6K $0 5 2025-12-12
NUVASIVE INC (NUVA) Delisted SVP & General Counsel 0 $39.75 $0 $0 12 2023-09-05

Recent Filings

18 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-04-22 QDEL Grant (A) — $0 EDGAR
2025-12-12 STAA Tax (F) −2,616 -$64.6K EDGAR
2025-03-18 STAA Grant (A) — $0 EDGAR
2025-03-14 STAA Mixed +3,493 -$42.0K EDGAR
2024-03-14 STAA Grant (A) — $0 EDGAR
2023-12-12 STAA Grant (A) +21,935 $0 EDGAR
2023-09-05 NUVASIVE INC (NUVA) Delisted Disp (D) −22,423 $0 EDGAR
2023-03-03 NUVASIVE INC (NUVA) Delisted Mixed +3,357 -$84.3K EDGAR
2022-03-03 NUVASIVE INC (NUVA) Delisted Mixed +5,161 -$156.3K EDGAR
2022-02-14 NUVASIVE INC (NUVA) Delisted Grant (A) — $0 EDGAR
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.