DAVID S. GRAYZEL
CIK 1732786 · last filed 2026-07-21
"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 · Page 3 of 3
26 filingsInsider 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 |
|---|---|---|---|---|---|
| 2020-12-21 | Surface Oncology, Inc. (SURF) Delisted | Sell (S) | −1,700,000 | -$30.77M | EDGAR |
| 2020-06-12 | Surface Oncology, Inc. (SURF) Delisted | Grant (A) | — | $0 | EDGAR |
| 2019-10-03 | Surface Oncology, Inc. (SURF) Delisted | Grant (A) | — | $0 | EDGAR |
| 2019-07-02 | Surface Oncology, Inc. (SURF) Delisted | Grant (A) | — | $0 | EDGAR |
| 2019-06-06 | Surface Oncology, Inc. (SURF) Delisted | Grant (A) | — | $0 | EDGAR |
| 2018-04-23 | Surface Oncology, Inc. (SURF) Delisted | Mixed | +3,281,817 | $1.50M | EDGAR |
Showing 21–26 of 26
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Page 3 of 3
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.
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.