Melissa Cox

CIK 1928974 · View on SEC EDGAR ↗

Insider

First SEC filing: May 13, 2022 · Latest: May 13, 2022

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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

DTM selling Aug. 11, 2025

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 36 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

36 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Feb. 20, 2026	DTM	A	1,452	—	—	1,452 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 17, 2026	DTM	F	5,240	$132.65	$695,086	12,133 Direct	-30.16%	Disposed	-0.3% (price as of 2026-08-20)
Feb. 17, 2026	DTM	A	11,019	—	—	17,373 Direct	+173.42%	Acquired	(price as of 2026-08-20)
Feb. 1, 2026	DTM	M	2,094	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 1, 2026	DTM	F	1,179	$126.02	$148,578	6,354 Direct	-15.65%	Disposed	4.9% (price as of 2026-08-20)
Feb. 1, 2026	DTM	M	2,362	—	—	7,533 Direct	+45.68%	Acquired	(price as of 2026-08-20)
Jan. 28, 2026	DTM	A	2,850	—	—	2,850 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 11, 2025	DTM	S	4,755	$104.47	$496,755	5,171 Direct	-47.90%	Disposed	26.6% (price as of 2026-08-20)
Aug. 2, 2025	DTM	M	2,252	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Aug. 2, 2025	DTM	F	2,041	$105.61	$215,550	9,926 Direct	-17.06%	Disposed	25.2% (price as of 2026-08-20)
Aug. 2, 2025	DTM	M	2,597	—	—	11,967 Direct	+27.72%	Acquired	(price as of 2026-08-20)
Feb. 25, 2025	DTM	A	1,480	—	—	1,480 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 25, 2025	DTM	F	3,375	$95.80	$323,325	9,370 Direct	-26.48%	Disposed	38.0% (price as of 2026-08-20)
Feb. 25, 2025	DTM	A	7,409	—	—	12,745 Direct	+138.85%	Acquired	(price as of 2026-08-20)
Feb. 4, 2025	DTM	M	1,589	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 4, 2025	DTM	F	790	$101.32	$80,043	5,336 Direct	-12.90%	Disposed	30.5% (price as of 2026-08-20)
Feb. 4, 2025	DTM	M	1,589	—	—	6,126 Direct	+35.02%	Acquired	(price as of 2026-08-20)
Aug. 2, 2024	DTM	F	574	$72.85	$41,816	4,537 Direct	-11.23%	Disposed	81.5% (price as of 2026-08-20)
Aug. 2, 2024	DTM	M	1,126	—	—	2,252 Direct	-33.33%	Disposed	(price as of 2026-08-20)
Aug. 2, 2024	DTM	M	1,258	—	—	5,111 Direct	+32.65%	Acquired	(price as of 2026-08-20)
Feb. 15, 2024	DTM	A	2,843	—	—	2,843 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 15, 2024	DTM	F	872	$52.43	$45,719	3,853 Direct	-18.46%	Disposed	152.2% (price as of 2026-08-20)
Feb. 15, 2024	DTM	A	1,734	—	—	4,725 Direct	+57.97%	Acquired	(price as of 2026-08-20)
Jan. 27, 2024	DTM	M	513	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 27, 2024	DTM	F	285	$54.67	$15,581	2,991 Direct	-8.70%	Disposed	141.9% (price as of 2026-08-20)
Jan. 27, 2024	DTM	M	560	—	—	3,276 Direct	+20.62%	Acquired	(price as of 2026-08-20)
Aug. 2, 2023	DTM	M	1,126	—	—	3,378 Direct	-25.00%	Disposed	(price as of 2026-08-20)
Aug. 2, 2023	DTM	F	547	$51.62	$28,236	2,716 Direct	-16.76%	Disposed	156.1% (price as of 2026-08-20)
Aug. 2, 2023	DTM	M	1,200	—	—	3,263 Direct	+58.17%	Acquired	(price as of 2026-08-20)
Feb. 3, 2023	DTM	F	718	$54.65	$39,239	2,063 Direct	-25.82%	Disposed	141.9% (price as of 2026-08-20)
Feb. 1, 2023	DTM	A	2,094	—	—	2,094 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 1, 2023	DTM	A	1,411	—	—	2,781 Direct	+102.99%	Acquired	(price as of 2026-08-20)
Jan. 29, 2023	DTM	M	513	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 29, 2023	DTM	F	187	$53.90	$10,079	1,370 Direct	-12.01%	Disposed	145.3% (price as of 2026-08-20)
Jan. 29, 2023	DTM	M	532	—	—	1,557 Direct	+51.90%	Acquired	(price as of 2026-08-20)
Aug. 8, 2022	DTM	J	363	$51.50	$18,694	0 Indirect	-100.00%	Disposed	156.7% (price as of 2026-08-20)
May 6, 2022	DTM	A	861	—	—	861 Direct	—	Acquired	(price as of 2026-08-20)

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
Feb. 20, 2026	DTM	Restricted Stock Units	Common stock (1,452)	—	—	1,452	Acquired
Feb. 1, 2026	DTM	Restricted Stock Units	Common stock (2,094)	—	—	2,094	Disposed
Jan. 28, 2026	DTM	Restricted Stock Units	Common stock (2,850)	—	—	2,850	Acquired
Aug. 2, 2025	DTM	Restricted Stock Units	Common Stock (2,252)	—	—	2,252	Disposed
Feb. 25, 2025	DTM	Restricted Stock Units	Common Stock (1,480)	—	—	1,480	Acquired
Feb. 4, 2025	DTM	Restricted Stock Units	Common Stock	—	—	1,589	Disposed
Aug. 2, 2024	DTM	Restricted Stock Units	Common Stock (1,126)	—	—	1,126	Disposed
Feb. 15, 2024	DTM	Restricted Stock Units	Common Stock (2,843)	—	—	2,843	Acquired
Jan. 27, 2024	DTM	Restricted Stock Units	Common Stock (513)	—	—	513	Disposed
Aug. 2, 2023	DTM	Restricted Stock Units	Common Stock	—	—	1,126	Disposed
Feb. 1, 2023	DTM	Restricted Stock Units	Common Stock (2,094)	—	—	2,094	Acquired
Jan. 29, 2023	DTM	Restricted Stock Units	Common Stock (513)	—	—	513	Disposed
May 6, 2022	DTM	Restricted Stock Units	Common Stock (861)	—	—	861	Acquired

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

Initial ownership (Form 3) 6 holdings

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

Date	Ticker	Security	Shares	Ownership
May 13, 2022	DTM	Common Stock	1,025	Direct
May 13, 2022	DTM	Common Stock	358	Indirect
May 13, 2022	DTM	Restricted Stock Units [F1]→ Common Stock	—	Direct
May 13, 2022	DTM	Restricted Stock Units [F1]→ Common Stock	—	Direct
May 13, 2022	DTM	Restricted Stock Units→ Common Stock	—	Direct
May 13, 2022	DTM	Restricted Stock Units→ Common Stock	—	Direct