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Louis M Alterman

CIK 1623397 · Chief Financial Officer · last filed 2026-07-02

Louis M Alterman is a Chief Financial Officer who has filed 15 SEC Form 4 insider transactions across 2 companies since 2014. The most recent filing, for IRDM, was dated Jul 2, 2026. Current disclosed insider exposure totals $645.2K 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

$645.2K

Companies

2

Total Filings

15

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
IRDM Director 13,809 $46.72 $645.2K $0 4 2026-07-02
EarthLink Holdings, LLC (ELNK) Delisted Chief Financial Officer 94,530 — — $0 8 2016-02-22

Recent Filings

15 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
2026-07-02 IRDM Grant (A) +37 $0 EDGAR
2026-04-02 IRDM Grant (A) +74 $0 EDGAR
2026-01-07 IRDM Grant (A) +10,822 $0 EDGAR
2026-01-05 IRDM Grant (A) +2,876 $0 EDGAR
2017-02-27 — Disp (D) −127,358 $0
2017-02-21 — Mixed +39,464 $0
2016-10-31 — Mixed +4,538 $0
2016-02-22 EarthLink Holdings, LLC (ELNK) Delisted Mixed +24,577 $0 EDGAR
2015-11-06 EarthLink Holdings, LLC (ELNK) Delisted Mixed +2,199 -$18.9K EDGAR
2015-10-29 EarthLink Holdings, LLC (ELNK) Delisted Mixed +4,372 $0 EDGAR
Showing 1–10 of 15
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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.