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ARTHUR A LEVIN

CIK 1181556 · Chief Scientific Officer · last filed 2026-06-05

ARTHUR A LEVIN is a Chief Scientific Officer who has filed 60 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing, for STOK, was dated Jun 5, 2026. Across all open-market trades the lifetime net is −$18.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.1M 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

$1.10M

Companies

4

Total Filings

60

Lifetime Open-Market Net

-$18.21M

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
STOK Director 22,216 $29.39 $652.9K -$782.1K 15 2026-06-05
Avidity Biosciences, Inc. (RNAM) Delisted Director 0 — — $0 1 2026-02-27
RNA Director 39,062 $11.49 $448.8K -$17.37M 33 2026-01-23
IONIS PHARMACEUTICALS INC (ISIS) Delisted Vice President 1,674 — — -$60.7K 2 2007-04-27

Recent Filings

60 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
2026-06-05 STOK Grant (A) — $0 EDGAR
2026-03-17 STOK Sell (S) −605 -$22.3K EDGAR
2026-03-13 STOK Notice (144) −605 -$22.1K EDGAR
2026-02-27 Avidity Biosciences, Inc. (RNAM) Delisted Disp (D) −147,934 $0 EDGAR
2026-01-23 RNA Sell (S) −1,758 -$127.4K EDGAR
2026-01-05 STOK Exer (M) +1,211 $0 EDGAR
2025-12-22 RNA Gift (G) −1,330 $0 EDGAR
2025-10-01 STOK Exer (M) +1,211 $0 EDGAR
2025-08-08 RNA Mixed — -$2.72M EDGAR
2025-08-06 Avidity Biosciences, Inc. (RNAM) Delisted Notice (144) −107,500 -$4.11M EDGAR
Showing 1–10 of 60
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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.