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MADISON DEARBORN PARTNERS LLC

CIK 1181100 · last filed 2026-06-08

MADISON DEARBORN PARTNERS LLC is a corporate insider who has filed 8 SEC Form 4 insider transactions across 6 companies since 2007. The most recent filing, for AVEX, was dated Jun 8, 2026. Across all open-market trades the lifetime net is −$2.05B, making them a net seller over the disclosed history. Current disclosed insider exposure totals $4.34B across reported positions. The firm reports its address in Chicago, IL. 36 SEC filings were submitted jointly with SAMUEL M MENCOFF.

"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

$4.34B

Companies

6

Total Filings

8

Lifetime Open-Market Net

-$2.05B

Filer Profile

Reported Address
70 WEST MADISON STREET, SUITE 4600
CHICAGO, IL 60602
Phone
(312) 895-1000
State of Incorporation
DE
Related Filers
SAMUEL M MENCOFF — 36 joint filings, latest 2021-12-20
THOMAS S SOULELES — 4 joint filings, latest 2014-03-13
MATTHEW W NORTON — 2 joint filings, latest 2014-03-13
TIMOTHY P SULLIVAN — 1 joint filings, latest 2014-10-07
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
AVEX 10%+ Owner 22,858,846 $15.81 $361.40M -$236.39M 1 2026-06-08
OPCH Director 56,995 $24.38 $1.39M $0 1 2021-11-15
EVO Payments, Inc. (EVOP) Delisted Director 1,242,515 $33.99 $42.23M $0 2 2020-04-23
BCC Director 15,835,938 $76.97 $1.22B -$1.81B 2 2013-07-31
Great Lakes Dredge & Dock CORP (GLDD) Delisted 10%+ Owner 26,708,402 $17.00 $454.04M $0 1 2007-03-21
PKG 10%+ Owner 11,783,298 $234.19 $2.76B $0 1 2007-01-29

Recent Filings

8 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
2026-06-08 AVEX Mixed −32,036,592 -$236.39M EDGAR
2021-11-15 OPCH Other (J) −1,236,598 $0 EDGAR
2020-04-23 EVO Payments, Inc. (EVOP) Delisted Grant (A) — $0 EDGAR
2019-04-08 EVO Payments, Inc. (EVOP) Delisted Mixed −47,108,259 $0 EDGAR
2013-07-31 BCC Mixed −97,048,434 -$2.51B EDGAR
2013-02-28 BCC Grant (A) — $0 EDGAR
2007-03-21 Great Lakes Dredge & Dock CORP (GLDD) Delisted Other (J) +305,628 $1.77M EDGAR
2007-01-29 PKG Other (J) −1,132,144 $0 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.