Joseph C. Breunig

CIK 1500401 · Exec VP, Chemicals · last filed 2026-05-21

"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.

Disclosed Exposure

$93.7K

Companies

3

Total Filings

74

Lifetime Open-Market Net

-$34.8K

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
MTX	Director	1,200	$78.12	$93.7K	$83.4K	59	2026-05-21
AXIALL CORP/DE/ (AXLL) Delisted	Exec VP, Chemicals	81,381	—	—	-$181.8K	9	2015-09-02
AXIALL CORP/DE/ (GGC) Delisted	Exec. VP, Chemicals	51,773	—	—	$63.6K	6	2012-10-09

Recent Filings · Page 4 of 8

74 filings

Form 4 transactions across all companies, newest first.

Filed	Symbol	Action	Net Shares	Net $	Link
2020-05-14	MTX	Grant (A)	—	$0	EDGAR
2020-03-09	MTX	Grant (A)	—	$0	EDGAR
2019-12-13	MTX	Grant (A)	—	$0	EDGAR
2019-09-06	MTX	Grant (A)	—	$0	EDGAR
2019-06-14	MTX	Grant (A)	—	$0	EDGAR
2019-05-17	MTX	Grant (A)	—	$0	EDGAR
2019-03-08	MTX	Grant (A)	—	$0	EDGAR
2018-12-11	MTX	Grant (A)	—	$0	EDGAR
2018-09-07	MTX	Grant (A)	—	$0	EDGAR
2018-06-18	MTX	Grant (A)	—	$0	EDGAR

Showing 31–40 of 74

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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.