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DAVID S. GRAYZEL

CIK 1732786 · last filed 2026-07-21

DAVID S. GRAYZEL is a corporate insider who has filed 26 SEC Form 4 insider transactions across 3 companies since 2018. The most recent filing, for QTTB, was dated Jul 21, 2026. Across all open-market trades the lifetime net is −$35.9M, making them a net seller over the disclosed history.

"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

$0

Companies

3

Total Filings

26

Lifetime Open-Market Net

-$35.87M

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
QTTB Director — $15.95 — $0 7 2026-07-21
Jade Biosciences, Inc. (AVTE) Delisted Director 50,992 $93.80 $4.78M $7.17M 9 2024-06-07
Surface Oncology, Inc. (SURF) Delisted Director 0 $1.07 $0 -$43.04M 10 2023-09-08

Recent Filings

26 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
2026-07-21 QTTB Grant (A) — $0 EDGAR
2026-06-16 QTTB Grant (A) — $0 EDGAR
2026-01-30 QTTB Grant (A) — $0 EDGAR
2025-10-27 QTTB Grant (A) — $0 EDGAR
2025-02-26 QTTB Mixed — $0 EDGAR
2024-08-14 QTTB Grant (A) — $0 EDGAR
2024-06-07 Jade Biosciences, Inc. (AVTE) Delisted Grant (A) — $0 EDGAR
2024-04-11 Jade Biosciences, Inc. (AVTE) Delisted Sell (S) −11,882 -$334.5K EDGAR
2024-03-27 QTTB Grant (A) — $0 EDGAR
2024-01-04 Jade Biosciences, Inc. (AVTE) Delisted Grant (A) — $0 EDGAR
Showing 1–10 of 26
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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.