Stephen Mitchell Jr. Howell

CIK 2025334 · COO · last filed 2026-08-14

Stephen Mitchell Jr. Howell is a COO who has filed 7 SEC Form 4 insider transactions across 1 company since 2024. The most recent filing, for RIOT, was dated Aug 14, 2026. Current disclosed insider exposure totals $32.6M 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

$32.63M

Companies

1

Total Filings

7

Lifetime Open-Market Net

$0

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
RIOT	COO	1,834,408	$17.79	$32.63M	$0	7	2026-08-14

Recent Filings

7 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
2026-08-14	RIOT	Gift (G)	−21,198	$0	EDGAR
2026-08-04	RIOT	Tax (F)	−153,162	-$3.09M	EDGAR
2026-07-06	RIOT	Tax (F)	−21,966	-$526.3K	EDGAR
2026-01-05	RIOT	Mixed	+562,466	-$373.5K	EDGAR
2025-10-10	RIOT	Tax (F)	−20,345	-$229.3K	EDGAR
2025-07-03	RIOT	Mixed	+645,138	-$229.3K	EDGAR
2024-07-03	RIOT	Mixed	+373,696	-$31.7K	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.