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Mark R Sotir

CIK 1397283 · Executive Chairman · last filed 2026-04-02

Mark R Sotir is an Executive Chairman who has filed 52 SEC Form 4 insider transactions across 7 companies since 2007. The most recent filing, for ARDT, was dated Apr 2, 2026. Current disclosed insider exposure totals $446.7K 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

$446.7K

Companies

7

Total Filings

52

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
ARDT Director 38,709 $11.54 $446.7K $0 3 2026-04-02
Exterran Corp (EXTN) Delisted Executive Chairman 0 $4.58 $0 $0 22 2022-10-13
Archrock, Inc. (EXH) Delisted Executive Chairman 25,059 — — $0 12 2015-03-05
DINE Director 0 $25.03 $0 $0 6 2010-12-15
MiddleBrook Pharmaceuticals, Inc. (MBRK) Delisted Director — — — $0 2 2009-06-24
REWARDS NETWORK INC (IRN) Delisted Director 3,623 — — $0 1 2008-02-21
Adams Respiratory Therapeutics, Inc. (ARXT) Delisted Director 0 — — $0 6 2008-01-30

Recent Filings

52 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
2026-04-02 ARDT Grant (A) +14,231 $0 EDGAR
2025-03-25 ARDT Grant (A) +12,916 $0 EDGAR
2024-07-22 ARDT Grant (A) +11,562 $0 EDGAR
2022-10-13 Exterran Corp (EXTN) Delisted Disp (D) −139,165 $0 EDGAR
2022-03-08 Exterran Corp (EXTN) Delisted Grant (A) +5,167 $32.2K EDGAR
2021-11-09 Exterran Corp (EXTN) Delisted Grant (A) +7,283 $32.2K EDGAR
2021-08-13 Exterran Corp (EXTN) Delisted Grant (A) +6,907 $30.4K EDGAR
2021-03-08 Exterran Corp (EXTN) Delisted Grant (A) +32,107 $155.4K EDGAR
2020-11-06 Exterran Corp (EXTN) Delisted Grant (A) +7,413 $30.4K EDGAR
2020-08-13 Exterran Corp (EXTN) Delisted Grant (A) +5,419 $32.2K EDGAR
Showing 1–10 of 52
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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.