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Adrian W Quartel

CIK 1910132 · Chief Medical Officer · last filed 2026-07-29

Adrian W Quartel is a Chief Medical Officer who has filed 6 SEC Form 4 insider transactions across 3 companies since 2022. The most recent filing, for SPRB, was dated Jul 29, 2026. Across all open-market trades the lifetime net is −$40.0K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $161.4K 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

$161.4K

Companies

3

Total Filings

6

Lifetime Open-Market Net

-$40.0K

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
SPRB Chief Medical Officer — $52.49 — $0 1 2026-07-29
ZVRA Chief Medical Officer 14,256 $11.32 $161.4K -$40.0K 2 2026-02-02
Acer Therapeutics Inc. (ACER) Delisted Chief Medical Officer — $0.66 — $0 2 2023-03-16

Recent Filings

6 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
2026-07-29 SPRB Grant (A) — $0 EDGAR
2026-02-02 ZVRA Mixed +6,800 -$40.0K EDGAR
2026-01-30 ZVRA Notice (144) −4,533 -$40.2K EDGAR
2025-03-27 ZVRA Grant (A) — $0 EDGAR
2023-03-16 Acer Therapeutics Inc. (ACER) Delisted Grant (A) — $0 EDGAR
2022-02-23 Acer Therapeutics Inc. (ACER) Delisted Grant (A) — $0 EDGAR
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.