David T Howton

CIK 1529297 · Chief Operating Officer · last filed 2026-04-21

"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

$11.52M

Companies

3

Total Filings

40

Lifetime Open-Market Net

-$43.82M

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
SLDB Chief Operating Officer 105,077 $7.14 $750.2K -$498.9K 12 2026-04-21
SRPT EVP, General Counsel 130,984 $15.31 $2.01M -$43.31M 26 2020-06-22
VRTX SVP & Chief Legal Officer 19,703 $444.93 $8.77M -$14.5K 2 2012-02-06

Recent Filings · Page 2 of 4

40 filings
Form 4 transactions across all companies, newest first.
Filed Symbol Action Net Shares Net $ Link
2023-12-05 SLDB Mixed +7,684 -$14.9K EDGAR
2022-12-05 SLDB Grant (A) $0 EDGAR
2020-06-22 SRPT Mixed -$15.25M EDGAR
2020-02-28 SRPT Grant (A) +6,700 $0 EDGAR
2019-12-17 SRPT Mixed -$8.11M EDGAR
2019-11-26 SRPT Mixed +6,468 -$2.37M EDGAR
2019-03-29 SRPT Mixed +2,957 -$280.3K EDGAR
2019-03-04 SRPT Mixed −3,825 $0 EDGAR
2019-02-01 SRPT Mixed −8,500 -$3.73M EDGAR
2018-08-08 SRPT Tax (F) −6,800 -$822.9K EDGAR
Showing 1120 of 40
Page 2 of 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.