DAVID S KABAKOFF

CIK 1024008 · last filed 2025-06-24

"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.

Disclosed Exposure

$10.42M

Companies

3

Total Filings

52

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	—	$2.08	—	$0	7	2025-06-24
CSTL	Director	503,577	$20.70	$10.42M	-$63.36M	23	2021-06-21
Trius Therapeutics Inc (TSRX) Delisted	Director	58,265	—	—	$150.0K	6	2013-05-23

Recent Filings · Page 3 of 6

52 filings

Form 4 transactions across all companies, newest first.

Filed	Symbol	Action	Net Shares	Net $	Link
2020-06-15	NXTC	Grant (A)	—	$0	EDGAR
2020-06-08	CSTL	Grant (A)	—	$0	EDGAR
2020-05-14	CSTL	Sell (S)	−250,000	-$8.62M	EDGAR
2020-02-21	CSTL	Sell (S)	−25,000	-$800.8K	EDGAR
2020-02-18	CSTL	Sell (S)	−25,000	-$800.2K	EDGAR
2020-02-10	CSTL	Sell (S)	−25,000	-$775.8K	EDGAR
2020-02-04	CSTL	Sell (S)	−50,000	-$1.53M	EDGAR
2020-01-30	CSTL	Sell (S)	−25,000	-$750.5K	EDGAR
2019-07-31	CSTL	Mixed	+1,833,577	$2.07M	EDGAR
2019-06-17	NXTC	Grant (A)	—	$0	EDGAR

Showing 21–30 of 52

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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.