Carolyn K Pittman

Insider

First SEC filing: Aug. 15, 2017 · Latest: May 21, 2026

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

MTX buying May 17, 2018

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 41 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

41 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
July 1, 2026	MTX	A	99	—	—	20,750 Direct	+0.48%	Acquired	(price as of 2026-08-21)
June 18, 2026	MTX	A	31	—	—	20,651 Direct	+0.15%	Acquired	(price as of 2026-08-21)
May 20, 2026	MTX	A	1,908	—	—	20,619 Direct	+10.20%	Acquired	(price as of 2026-08-21)
April 1, 2026	MTX	A	102	—	—	18,711 Direct	+0.55%	Acquired	(price as of 2026-08-21)
March 6, 2026	MTX	A	33	—	—	18,609 Direct	+0.18%	Acquired	(price as of 2026-08-21)
Jan. 2, 2026	MTX	A	120	—	—	18,576 Direct	+0.65%	Acquired	(price as of 2026-08-21)
Dec. 4, 2025	MTX	A	38	—	—	18,456 Direct	+0.21%	Acquired	(price as of 2026-08-21)
Oct. 1, 2025	MTX	A	79	—	—	18,419 Direct	+0.43%	Acquired	(price as of 2026-08-21)
Sept. 5, 2025	MTX	A	31	—	—	18,340 Direct	+0.17%	Acquired	(price as of 2026-08-21)
July 1, 2025	MTX	A	85	—	—	18,308 Direct	+0.47%	Acquired	(price as of 2026-08-21)
June 12, 2025	MTX	A	36	—	—	18,224 Direct	+0.20%	Acquired	(price as of 2026-08-21)
May 14, 2025	MTX	A	2,500	—	—	18,188 Direct	+15.94%	Acquired	(price as of 2026-08-21)
April 1, 2025	MTX	A	78	—	—	15,688 Direct	+0.50%	Acquired	(price as of 2026-08-21)
March 7, 2025	MTX	A	25	—	—	15,610 Direct	+0.16%	Acquired	(price as of 2026-08-21)
Jan. 2, 2025	MTX	A	65	—	—	15,584 Direct	+0.42%	Acquired	(price as of 2026-08-21)
Dec. 5, 2024	MTX	A	21	—	—	15,519 Direct	+0.14%	Acquired	(price as of 2026-08-21)
Oct. 1, 2024	MTX	A	96	—	—	15,498 Direct	+0.62%	Acquired	(price as of 2026-08-21)
Sept. 6, 2024	MTX	A	21	—	—	15,402 Direct	+0.14%	Acquired	(price as of 2026-08-21)
July 1, 2024	MTX	A	89	—	—	15,381 Direct	+0.58%	Acquired	(price as of 2026-08-21)
June 13, 2024	MTX	A	18	—	—	15,291 Direct	+0.12%	Acquired	(price as of 2026-08-21)
May 15, 2024	MTX	A	1,542	—	—	15,273 Direct	+11.23%	Acquired	(price as of 2026-08-21)
March 7, 2024	MTX	A	19	—	—	13,633 Direct	+0.14%	Acquired	(price as of 2026-08-21)
Jan. 2, 2024	MTX	A	104	—	—	13,614 Direct	+0.77%	Acquired	(price as of 2026-08-21)
Dec. 7, 2023	MTX	A	21	—	—	13,510 Direct	+0.16%	Acquired	(price as of 2026-08-21)
Oct. 2, 2023	MTX	A	114	—	—	13,489 Direct	+0.85%	Acquired	(price as of 2026-08-21)
Sept. 8, 2023	MTX	A	12	—	—	13,375 Direct	+0.09%	Acquired	(price as of 2026-08-21)
July 3, 2023	MTX	A	106	—	—	13,363 Direct	+0.80%	Acquired	(price as of 2026-08-21)
June 15, 2023	MTX	A	12	—	—	13,257 Direct	+0.09%	Acquired	(price as of 2026-08-21)
May 17, 2023	MTX	A	2,067	—	—	13,245 Direct	+18.49%	Acquired	(price as of 2026-08-21)
April 3, 2023	MTX	A	101	—	—	11,178 Direct	+0.91%	Acquired	(price as of 2026-08-21)
July 2, 2018	MTX	A	74	—	—	1,727 Direct	+4.48%	Acquired	(price as of 2026-08-21)
June 14, 2018	MTX	A	1	—	—	1,653 Direct	+0.06%	Acquired	(price as of 2026-08-21)
May 17, 2018	MTX	P	400	$72.65	$29,060	400 Direct	—	Acquired	-1.2% (price as of 2026-08-21)
May 17, 2018	MTX	P	400	$72.65	$29,060	400 Direct	—	Acquired	-1.2% (price as of 2026-08-21)
May 16, 2018	MTX	A	1,381	—	—	1,652 Direct	+509.59%	Acquired	(price as of 2026-08-21)
May 16, 2018	MTX	A	1,344	—	—	1,614 Direct	+497.78%	Acquired	(price as of 2026-08-21)
April 2, 2018	MTX	A	86	—	—	270 Direct	+46.74%	Acquired	(price as of 2026-08-21)
March 8, 2018	MTX	A	3	—	—	184 Direct	+1.66%	Acquired	(price as of 2026-08-21)
Jan. 2, 2018	MTX	A	81	—	—	295 Direct	+37.85%	Acquired	(price as of 2026-08-21)
Dec. 8, 2017	MTX	A	0	—	—	214 Direct	0.00%	Acquired	(price as of 2026-08-21)
Oct. 2, 2017	MTX	A	62	—	—	214 Direct	+40.79%	Acquired	(price as of 2026-08-21)
Sept. 7, 2017	MTX	A	0	—	—	152 Direct	0.00%	Acquired	(price as of 2026-08-21)
Aug. 14, 2017	MTX	A	152	—	—	152 Direct	—	Acquired	(price as of 2026-08-21)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
July 1, 2026	MTX	PHANTOM STOCK UNITS	COMMON STOCK (99)	—	—	99	Acquired
June 18, 2026	MTX	PHANTOM STOCK UNITS	COMMON STOCK (31)	—	—	31	Acquired
May 20, 2026	MTX	PHANTOM STOCK UNITS	COMMON STOCK (1,908)	—	—	1,908	Acquired
April 1, 2026	MTX	PHANTOM STOCK UNITS	COMMON STOCK (102)	—	—	102	Acquired
March 6, 2026	MTX	PHANTOM STOCK UNITS	COMMON STOCK (33)	—	—	33	Acquired
Jan. 2, 2026	MTX	PHANTOM STOCK UNITS	COMMON STOCK (120)	—	—	120	Acquired
Dec. 4, 2025	MTX	PHANTOM STOCK UNITS	COMMON STOCK (38)	—	—	38	Acquired
Oct. 1, 2025	MTX	PHANTOM STOCK UNITS	COMMON STOCK (79)	—	—	79	Acquired
Sept. 5, 2025	MTX	PHANTOM STOCK UNITS	COMMON STOCK (31)	—	—	31	Acquired
July 1, 2025	MTX	PHANTOM STOCK UNITS	COMMON STOCK (85)	—	—	85	Acquired
June 12, 2025	MTX	PHANTOM STOCK UNITS	COMMON STOCK (36)	—	—	36	Acquired
May 14, 2025	MTX	PHANTOM STOCK UNITS	COMMON STOCK (2,500)	—	—	2,500	Acquired
April 1, 2025	MTX	PHANTOM STOCK UNITS	COMMON STOCK (78)	—	—	78	Acquired
March 7, 2025	MTX	PHANTOM STOCK UNITS	COMMON STOCK (25)	—	—	25	Acquired
Jan. 2, 2025	MTX	PHANTOM STOCK UNITS	COMMON STOCK (65)	—	—	65	Acquired
Dec. 5, 2024	MTX	PHANTOM STOCK UNITS	COMMON STOCK (21)	—	—	21	Acquired
Oct. 1, 2024	MTX	PHANTOM STOCK UNITS	COMMON STOCK (96)	—	—	96	Acquired
Sept. 6, 2024	MTX	PHANTOM STOCK UNITS	COMMON STOCK (21)	—	—	21	Acquired
July 1, 2024	MTX	PHANTOM STOCK UNITS	COMMON STOCK (89)	—	—	89	Acquired
June 13, 2024	MTX	PHANTOM STOCK UNITS	COMMON STOCK (18)	—	—	18	Acquired
May 15, 2024	MTX	PHANTOM STOCK UNITS	COMMON STOCK (1,542)	—	—	1,542	Acquired
March 7, 2024	MTX	PHANTOM STOCK UNITS	COMMON STOCK (19)	—	—	19	Acquired
Jan. 2, 2024	MTX	PHANTOM STOCK UNITS	COMMON STOCK (104)	—	—	104	Acquired
Dec. 7, 2023	MTX	PHANTOM STOCK UNITS	COMMON STOCK (21)	—	—	21	Acquired
Oct. 2, 2023	MTX	PHANTOM STOCK UNITS	COMMON STOCK (114)	—	—	114	Acquired
Sept. 8, 2023	MTX	PHANTOM STOCK UNITS	COMMON STOCK (12)	—	—	12	Acquired
July 3, 2023	MTX	PHANTOM STOCK UNITS	COMMON STOCK (106)	—	—	106	Acquired
June 15, 2023	MTX	PHANTOM STOCK UNITS	COMMON STOCK (12)	—	—	12	Acquired
May 17, 2023	MTX	PHANTOM STOCK UNITS	COMMON STOCK (2,067)	—	—	2,067	Acquired
April 3, 2023	MTX	PHANTOM STOCK UNITS	COMMON STOCK (101)	—	—	101	Acquired
July 2, 2018	MTX	Phantom Stock Units	Common Stock (74)	—	—	74	Acquired
June 14, 2018	MTX	Phantom Stock Units	Common Stock (1)	—	—	1	Acquired
May 16, 2018	MTX	Phantom Stock Units	Common Stock	—	—	1,381	Acquired
May 16, 2018	MTX	Phantom Stock Units	Common Stock (1,344)	—	—	1,344	Acquired
April 2, 2018	MTX	Phantom Stock Units	Common Stock (86)	—	—	86	Acquired
March 8, 2018	MTX	Phantom Stock Units	Common Stock (3)	—	—	3	Acquired
Jan. 2, 2018	MTX	Phantom Stock Units	Common Stock (81)	—	—	81	Acquired
Dec. 8, 2017	MTX	Phantom Stock Units	Common Stock (0)	—	—	0	Acquired
Oct. 2, 2017	MTX	Phantom Stock Units	Common Stock (62)	—	—	62	Acquired
Sept. 7, 2017	MTX	Phantom Stock Units	Common Stock (0)	—	—	0	Acquired
Aug. 14, 2017	MTX	Phantom Stock Units	Common Stock (152)	—	—	152	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Aug. 15, 2017	MTX	Common Stock	0	Direct