David B Singer
CIK 1240366 · last filed 2026-05-29
David B Singer is a corporate insider who has filed 28 SEC Form 4 insider transactions across 6 companies since 2007. The most recent filing, for INFQ.WS, was dated May 29, 2026. Across all open-market trades the lifetime net is −$258.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $3.7M 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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
INFQ.WS price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
1900 N. PEARL STREET, 20TH FLOOR
DALLAS, TX 75201
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| INFQ.WS | Director | 0 | $3.85 | $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 | $1.93 | $3.73M | $0 | 3 | 2021-06-22 |
| PACB | Director | — | $2.25 | — | $0 | 2 | 2012-06-15 |
| AFFYMETRIX INC (AFFX) Delisted | Director | — | — | — | $0 | 1 | 2007-06-15 |
Recent Filings
28 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-29 | INFQ.WS | Mixed | −3,672,005 | -$28.94M | EDGAR |
| 2026-05-29 | INFQ.WS | Mixed | −3,606,778 | -$47.60M | EDGAR |
| 2026-05-28 | INFQ.WS | Other (J) | −3,566,534 | $0 | EDGAR |
| 2026-05-27 | INFQ.WS | Sell (S) | −11,619,130 | -$181.60M | EDGAR |
| 2026-04-15 | INFQ.WS | Grant (A) | — | $0 | EDGAR |
| 2026-04-14 | INFQ.WS | Grant (A) | — | $0 | EDGAR |
| 2026-02-18 | INFQ.WS | Grant (A) | — | $0 | EDGAR |
| 2022-02-18 | CASTLIGHT HEALTH, INC. (CSLT) Delisted | Disp (D) | −405,184 | $0 | EDGAR |
| 2021-07-19 | 1Life Healthcare Inc (ONEM) Delisted | Grant (A) | +264 | $0 | EDGAR |
| 2021-06-22 | SEER | Grant (A) | — | $0 | EDGAR |
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.