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ERIC W GERSTENBERG

CIK 1211558 · CO-CEO · last filed 2026-08-18

ERIC W GERSTENBERG is a CO-CEO who has filed 141 SEC Form 4 insider transactions across 2 companies since 2007. The most recent filing shows the insider sold $803.3K of CLH on Aug 18, 2026. Across all open-market trades the lifetime net is −$23.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $17.8M 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.

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Disclosed Exposure

$17.82M

Companies

2

Total Filings

141

Lifetime Open-Market Net

-$23.70M

Filer Profile

Reported Address
24 MACFARLANE DRIVE
KINGSTON, MA 02364
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
CLH CO-CEO 56,793 $313.76 $17.82M -$1.80M 6 2026-08-18
CLHB CO-CEO 38,877 — — -$21.90M 127 2026-03-19

Recent Filings

141 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
2026-08-18 CLH Sell (S) −2,500 -$803.3K EDGAR
2026-08-14 CLH Notice (144) −2,500 -$805.0K EDGAR
2026-08-14 CLH Tax (F) −564 -$164.0K EDGAR
2026-08-14 CLH Sell (S) −1,000 -$293.0K EDGAR
2026-08-14 CLH Mixed −3,143 -$282.3K EDGAR
2026-08-14 CLH Sell (S) −2,500 -$699.6K EDGAR
2026-07-06 CLH Tax (F) −564 -$164.0K EDGAR
2026-03-19 CLHB Sell (S) −1,000 -$293.0K EDGAR
2026-03-18 CLH Notice (144) −1,000 -$290.0K EDGAR
2026-03-17 CLHB Mixed −3,143 -$282.3K EDGAR
Showing 1–10 of 141
Page 1 of 15
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.