DAVID B SINGER
CIK 1240366 · last filed 2026-05-29
"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
$4.16M
Companies
6
Total Filings
28
Lifetime Open-Market Net
-$258.14M
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 |
|---|---|---|---|---|---|---|---|
| INFQ.WS | Director | 0 | $4.71 | $0 | -$258.14M | 7 | 2026-05-29 |
| CASTLIGHT HEALTH, INC. (CSLT) Delisted | Director | 0 | $2.05 | $0 | $0 | 8 | 2022-02-18 |
| 1Life Healthcare Inc (ONEM) Delisted | Director | 264 | $16.47 | $4.3K | $0 | 6 | 2021-07-19 |
| SEER | Director | 1,934,954 | $2.15 | $4.16M | $0 | 3 | 2021-06-22 |
| PACB | Director | — | $1.39 | — | $0 | 2 | 2012-06-15 |
| AFFYMETRIX INC (AFFX) Delisted | Director | — | — | — | $0 | 1 | 2007-06-15 |
Recent Filings · Page 2 of 3
28 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 |
|---|---|---|---|---|---|
| 2021-06-14 | CASTLIGHT HEALTH, INC. (CSLT) Delisted | Grant (A) | +70,707 | $0 | EDGAR |
| 2021-04-19 | 1Life Healthcare Inc (ONEM) Delisted | Grant (A) | — | $0 | EDGAR |
| 2021-01-20 | 1Life Healthcare Inc (ONEM) Delisted | Grant (A) | — | $0 | EDGAR |
| 2020-12-11 | SEER | Grant (A) | — | $0 | EDGAR |
| 2020-12-10 | SEER | Conv (C) | +5,325,513 | $0 | EDGAR |
| 2020-10-19 | 1Life Healthcare Inc (ONEM) Delisted | Grant (A) | — | $0 | EDGAR |
| 2020-07-17 | 1Life Healthcare Inc (ONEM) Delisted | Grant (A) | — | $0 | EDGAR |
| 2020-06-05 | CASTLIGHT HEALTH, INC. (CSLT) Delisted | Grant (A) | +180,645 | $0 | EDGAR |
| 2020-05-18 | 1Life Healthcare Inc (ONEM) Delisted | Grant (A) | — | $0 | EDGAR |
| 2019-06-07 | CASTLIGHT HEALTH, INC. (CSLT) Delisted | Grant (A) | +44,164 | $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.
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.