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ELLEN B RICHSTONE

CIK 1281526 · last filed 2026-08-12

ELLEN B RICHSTONE is a corporate insider who has filed 73 SEC Form 4 insider transactions across 7 companies since 2014. The most recent filing, for OESX, was dated Aug 12, 2026. Across all open-market trades the lifetime net is +$356.4K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $1.3M 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

$1.26M

Companies

7

Total Filings

73

Lifetime Open-Market Net

$356.4K

Filer Profile

Reported Address
C/O SONUS NETWORKS, INC.
7 TECHNOLOGY PARK DRIVE
WESTFORD, MA 01886
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

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
OESX Director 35,897 $29.30 $1.05M $174.5K 20 2026-08-12
CGTX Director 83,500 $1.02 $85.6K $26.5K 8 2026-06-22
SUPERIOR INDUSTRIES INTERNATIONAL INC (SUP) Delisted Director 192,336 $0.32 $62.5K $130.3K 20 2025-05-27
EMAGIN CORP (EMAN) Delisted Director 0 $2.07 $0 $25.0K 18 2023-10-19
BIOA Director 13,333 $9.43 $125.7K $0 3 2017-08-16
BioAmber Inc. (MRH) Delisted Director — — — $0 1 2015-05-19
EveryWare Global, Inc. (EVRY) Delisted Director 30,435 — — $0 1 2014-11-18

Recent Filings

73 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
2026-08-12 OESX Grant (A) +2,532 $0 EDGAR
2026-06-22 CGTX Grant (A) +25,000 $0 EDGAR
2025-07-01 OESX Grant (A) +20,000 $0 EDGAR
2025-06-23 CGTX Grant (A) +34,000 $0 EDGAR
2025-05-27 SUPERIOR INDUSTRIES INTERNATIONAL INC (SUP) Delisted Exer (M) +37,338 $0 EDGAR
2025-02-24 OESX Buy (P) +20,000 $18.2K EDGAR
2025-02-21 OESX Buy (P) +13,874 $11.7K EDGAR
2025-02-19 OESX Buy (P) +13,000 $10.9K EDGAR
2025-02-18 OESX Buy (P) +10,000 $8.2K EDGAR
2024-06-17 OESX Buy (P) +20,000 $22.9K EDGAR
Showing 1–10 of 73
Page 1 of 8
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.