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DAVID R WALT

CIK 1205236 · last filed 2026-01-06

DAVID R WALT is a corporate insider who has filed 327 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing, for QTRX, was dated Jan 6, 2026. Across all open-market trades the lifetime net is −$97.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $136.0M 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

$135.97M

Companies

4

Total Filings

327

Lifetime Open-Market Net

-$97.57M

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
QTRX Director 1,872,890 $3.49 $6.54M $7.94M 18 2026-01-06
XCUR Director 13,725 $1.74 $23.9K $2.35M 3 2020-06-08
Dare Bioscience, Inc. (CERU) Delisted Director 19,370 — — $436.1K 24 2017-01-05
ILMN Director 670,600 $192.98 $129.41M -$108.29M 279 2016-04-11

Recent Filings

327 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
2026-01-06 QTRX Grant (A) +1,215 $0 EDGAR
2025-10-03 QTRX Grant (A) +2,594 $14.4K EDGAR
2025-07-02 QTRX Grant (A) +2,148 $14.4K EDGAR
2025-06-13 QTRX Buy (P) +160,000 $985.0K EDGAR
2025-06-09 QTRX Buy (P) +210,000 $1.13M EDGAR
2025-04-03 QTRX Grant (A) +2,156 $14.4K EDGAR
2025-01-06 QTRX Grant (A) +7,435 $0 EDGAR
2024-09-17 QTRX Mixed +45,000 $624.6K EDGAR
2024-01-04 QTRX Grant (A) +2,947 $0 EDGAR
2023-01-04 QTRX Grant (A) +8,083 $0 EDGAR
Showing 1–10 of 327
Page 1 of 33
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.