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Stephen E. Macadam

CIK 1432316 · President and CEO · last filed 2026-08-13

Stephen E. Macadam is a President and CEO who has filed 129 SEC Form 4 insider transactions across 9 companies since 2008. The most recent filing shows the insider bought $99.6K of ATMU on Aug 13, 2026. Across all open-market trades the lifetime net is −$5.5M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $85.3M across reported positions. 13 SEC filings were submitted jointly with Veritiv Corp.

"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

$85.25M

Companies

9

Total Filings

129

Lifetime Open-Market Net

-$5.53M

Filer Profile

Reported Address
C/O ENPRO INDUSTRIES, INC.
5605 CARNEGIE BLVD., STE. 500
CHARLOTTE, NC 28209
Related Filers
Veritiv Corp — 13 joint filings, latest 2023-11-30
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
ATMU Director 40,588 $44.77 $1.82M $561.3K 9 2026-08-13
Sleep Number Corp (SNBR) Delisted Director 30,437 $0.12 $3.8K $1.02M 10 2026-06-15
NBN Director 43,080 $129.88 $5.60M $249.8K 7 2026-05-11
Veritiv Corp (VRTV) Delisted Director 0 $169.99 $0 $589.9K 12 2023-11-30
VVV Director 14,802 $28.96 $428.7K $110.0K 21 2023-01-26
LPX Director 32,131 $66.83 $2.15M $508.2K 13 2022-05-06
NPO President and CEO 240,641 $312.76 $75.26M -$8.61M 50 2020-02-18
AXIALL CORP/DE/ (AXLL) Delisted Director 15,795 — — $47.5K 2 2013-05-22
AXIALL CORP/DE/ (GGC) Delisted Director 12,742 — — $0 4 2012-05-22

Recent Filings

129 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
2026-08-13 ATMU Buy (P) +2,000 $99.6K EDGAR
2026-06-15 Sleep Number Corp (SNBR) Delisted Disp (D) −97,272 -$42.4K EDGAR
2026-06-12 Sleep Number Corp (SNBR) Delisted Notice (144) −97,272 -$42.4K EDGAR
2026-05-21 Sleep Number Corp (SNBR) Delisted Grant (A) +15,067 $0 EDGAR
2026-05-13 ATMU Grant (A) +2,619 $0 EDGAR
2026-05-11 NBN Grant (A) +1,863 $0 EDGAR
2025-11-12 NBN Buy (P) +3,200 $249.8K EDGAR
2025-05-30 Sleep Number Corp (SNBR) Delisted Grant (A) +9,776 $0 EDGAR
2025-05-21 ATMU Grant (A) +3,886 $0 EDGAR
2025-05-19 NBN Grant (A) +1,499 $0 EDGAR
Showing 1–10 of 129
Page 1 of 13
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.