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Michael C Kaufmann

CIK 1471294 · CEO · last filed 2026-08-11

Michael C Kaufmann is a CEO who has filed 103 SEC Form 4 insider transactions across 3 companies since 2009. The most recent filing, for ADIG, was dated Aug 11, 2026. Across all open-market trades the lifetime net is −$41.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $154.0M across reported positions. 62 SEC filings were submitted jointly with CARDINAL HEALTH INC.

"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

$153.97M

Companies

3

Total Filings

103

Lifetime Open-Market Net

-$41.86M

Filer Profile

Reported Address
MSC INDUSTRIAL SUPPLY CO.
525 HARBOUR PLACE DRIVE
DAVIDSON, NC 28036
Related Filers
CARDINAL HEALTH INC — 62 joint filings, latest 2022-08-17
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
ADIG Director — — — $0 1 2026-08-11
MSM Director 15,501 $122.21 $1.89M $0 42 2026-01-26
CAH CEO 674,760 $225.38 $152.08M -$41.86M 60 2022-08-17

Recent Filings

103 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
2026-08-11 ADIG Grant (A) — $0 EDGAR
2026-01-26 MSM Mixed +745 $0 EDGAR
2026-01-23 MSM Exer (M) +823 $0 EDGAR
2025-01-28 MSM Exer (M) +1,542 $0 EDGAR
2025-01-23 MSM Grant (A) — $0 EDGAR
2024-01-29 MSM Exer (M) +1,620 $0 EDGAR
2024-01-25 MSM Grant (A) — $0 EDGAR
2023-01-31 MSM Exer (M) +804 $0 EDGAR
2023-01-27 MSM Mixed +789 $0 EDGAR
2022-08-17 CAH Mixed −71,923 -$7.83M EDGAR
Showing 1–10 of 103
Page 1 of 11
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.