Matthew Bennett Arnold

CIK 1727991 · last filed 2020-12-14

Matthew Bennett Arnold is a corporate insider who has filed 9 SEC Form 4 insider transactions across 1 company since 2018. The most recent filing shows the insider was granted $1.6M of SLDB on Dec 14, 2020. Across all open-market trades the lifetime net is −$310.4K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $32.8M 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.

Disclosed Exposure

$32.77M

Companies

1

Total Filings

9

Lifetime Open-Market Net

-$310.4K

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	Director	3,933,429	$8.33	$32.77M	-$310.4K	9	2020-12-14

Recent Filings

9 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
2020-12-14	SLDB	Grant (A)	+432,432	$1.60M	EDGAR
2020-06-18	SLDB	Grant (A)	—	$0	EDGAR
2019-07-29	SLDB	Grant (A)	+677,419	$3.15M	EDGAR
2019-07-12	SLDB	Gift (G)	−562,715	$0	EDGAR
2019-06-14	SLDB	Grant (A)	—	$0	EDGAR
2019-01-16	SLDB	Sell (S)	−5,000	-$160.0K	EDGAR
2019-01-08	SLDB	Sell (S)	−5,000	-$150.4K	EDGAR
2018-12-17	SLDB	Grant (A)	—	$0	EDGAR
2018-07-26	SLDB	Grant (A)	—	$0	EDGAR

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.