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DAVID S KABAKOFF

CIK 1024008 · last filed 2026-06-22

DAVID S KABAKOFF is a corporate insider who has filed 53 SEC Form 4 insider transactions across 3 companies since 2010. The most recent filing, for NXTC, was dated Jun 22, 2026. Across all open-market trades the lifetime net is −$63.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $12.0M 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

$12.03M

Companies

3

Total Filings

53

Lifetime Open-Market Net

-$63.21M

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
NXTC Director — $5.42 — $0 8 2026-06-22
CSTL Director 503,577 $23.89 $12.03M -$63.36M 23 2021-06-21
Trius Therapeutics Inc (TSRX) Delisted Director 58,265 — — $150.0K 6 2013-05-23

Recent Filings

53 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
2026-06-22 NXTC Grant (A) — $0 EDGAR
2025-06-24 NXTC Grant (A) — $0 EDGAR
2024-06-21 NXTC Grant (A) — $0 EDGAR
2023-06-23 NXTC Grant (A) — $0 EDGAR
2022-06-24 NXTC Grant (A) — $0 EDGAR
2021-06-28 NXTC Grant (A) — $0 EDGAR
2021-06-21 CSTL Sell (S) −30,000 -$2.25M EDGAR
2021-06-14 CSTL Grant (A) — $0 EDGAR
2021-04-07 CSTL Sell (S) −110,000 -$8.01M EDGAR
2021-04-02 CSTL Sell (S) −90,000 -$6.25M EDGAR
Showing 1–10 of 53
Page 1 of 6
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.