Dr. Halden Stuart Shane

Insider

First SEC filing: Feb. 4, 2016 · Latest: Feb. 4, 2016

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

TOMZ buying Aug. 22, 2023

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 16 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

16 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 15, 2024	TOMZ	A	100,000	—	—	1,510,000 Direct	+7.09%	Acquired	(price as of 2026-08-20)
Aug. 22, 2023	TOMZ	P	2,503	$1.20	$3,004	2,538,166 Direct	+0.10%	Acquired	-48.6% (price as of 2026-08-20)
Aug. 18, 2023	TOMZ	P	3,000	$1.07	$3,210	2,535,663 Direct	+0.12%	Acquired	-42.4% (price as of 2026-08-20)
Jan. 26, 2023	TOMZ	A	100,000	—	—	1,410,000 Direct	+7.63%	Acquired	(price as of 2026-08-20)
Jan. 18, 2022	TOMZ	A	172,500	—	—	1,341,250 Direct	+14.76%	Acquired	(price as of 2026-08-20)
Sept. 3, 2021	TOMZ	P	21,200	$2.02	$42,824	3,942,663 Direct	+0.54%	Acquired	-69.5% (price as of 2026-08-20)
Sept. 2, 2021	TOMZ	P	22,082	$2.00	$44,164	3,921,463 Direct	+0.57%	Acquired	-69.2% (price as of 2026-08-20)
Feb. 11, 2021	TOMZ	D	125,000	$2.52	$315,000	1,293,750 Direct	-8.81%	Disposed	-75.5% (price as of 2026-08-20)
Oct. 1, 2020	TOMZ	A	375,000	—	—	1,418,750 Direct	+35.93%	Acquired	(price as of 2026-08-20)
April 25, 2020	TOMZ	A	100,000	—	—	8,350,000 Direct	+1.21%	Acquired	(price as of 2026-08-20)
Jan. 31, 2020	TOMZ	A	1,250,000	—	—	9,250,000 Direct	+15.62%	Acquired	(price as of 2026-08-20)
Jan. 26, 2019	TOMZ	A	1,000,000	—	—	9,250,000 Direct	+12.12%	Acquired	(price as of 2026-08-20)
Nov. 19, 2018	TOMZ	A	250,000	—	—	8,250,000 Direct	+3.12%	Acquired	(price as of 2026-08-20)
Dec. 22, 2017	TOMZ	A	3,500,000	—	—	7,750,000 Direct	+82.35%	Acquired	(price as of 2026-08-20)
July 17, 2017	TOMZ	A	250,000	—	—	7,750,000 Direct	+3.33%	Acquired	(price as of 2026-08-20)
Dec. 30, 2016	TOMZ	A	250,000	—	—	7,500,000 Direct	+3.45%	Acquired	(price as of 2026-08-20)
Oct. 3, 2016	TOMZ	A	250,000	—	—	7,250,000 Direct	+3.57%	Acquired	(price as of 2026-08-20)
June 30, 2016	TOMZ	A	250,000	—	—	7,000,000 Direct	+3.70%	Acquired	(price as of 2026-08-20)
April 6, 2016	TOMZ	A	250,000	—	—	6,750,000 Direct	+3.85%	Acquired	(price as of 2026-08-20)
April 6, 2016	TOMZ	A	250,000	$0.50	$125,000	5,250,000 Direct	+5.00%	Acquired	-84.6% (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
May 15, 2024	TOMZ	Common Stock Purchase Options (right to buy)	Common Stock (100,000)	$0.75	May 15, 2034	100,000	Acquired
Jan. 26, 2023	TOMZ	Common Stock Purchase Options (right to buy)	Common Stock (100,000)	$0.85	Jan. 26, 2033	100,000	Acquired
Jan. 18, 2022	TOMZ	Common Stock Purchase Options (right to buy)	Common Stock (172,500)	$1.12	Jan. 18, 2032	172,500	Acquired
Feb. 11, 2021	TOMZ	Common Stock Purchase Warrants (right to buy)	Common Stock (125,000)	$2.40	Feb. 11, 2021	125,000	Disposed
Oct. 1, 2020	TOMZ	Common Stock Purchase Warrants	Common Stock (375,000)	$6.17	Oct. 1, 2030	375,000	Acquired
April 25, 2020	TOMZ	Common Stock Purchase Warrants	Common Stock (100,000)	$0.50	April 25, 2030	100,000	Acquired
Jan. 31, 2020	TOMZ	Common Stock Purchase Warrants	Common Stock (1,250,000)	$0.15	Jan. 31, 2025	1,250,000	Acquired
Jan. 26, 2019	TOMZ	Common Stock Purchase Warrants	Common Stock (1,000,000)	$0.10	Jan. 26, 2024	1,000,000	Acquired
Nov. 19, 2018	TOMZ	Common Stock Purchase Warrants	Common Stock (250,000)	$0.08	Nov. 19, 2023	250,000	Acquired
Dec. 22, 2017	TOMZ	Common Stock Purchase Warrants	Common Stock (3,500,000)	$0.12	Dec. 22, 2022	3,500,000	Acquired
July 17, 2017	TOMZ	Common Stock Purchase Warrants	Common Stock (250,000)	$0.10	July 17, 2022	250,000	Acquired
Dec. 30, 2016	TOMZ	Common Stock Purchase Warrants	Common Stock (250,000)	$0.27	Dec. 30, 2021	250,000	Acquired
Oct. 3, 2016	TOMZ	Common Stock Purchase Warrants	Common Stock (250,000)	$0.32	Sept. 30, 2021	250,000	Acquired
June 30, 2016	TOMZ	Common Stock Purchase Warrants	Common Stock (250,000)	$0.42	June 30, 2021	250,000	Acquired
April 6, 2016	TOMZ	Common Stock Purchase Warrants	Common Stock (250,000)	$0.50	March 31, 2021	250,000	Acquired
April 6, 2016	TOMZ	Common Stock Purchase Warrants	Common Stock (250,000)	$0.50	March 31, 2021	250,000	Acquired

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

Initial ownership (Form 3) 4 holdings

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

Date	Ticker	Security	Shares	Ownership
Feb. 4, 2016	TOMZ	Common Stock	18,770,048	Indirect
Feb. 4, 2016	TOMZ	Class A Preferred Stock	510,000	Direct
Feb. 4, 2016	TOMZ	Common Stock Purchase Warrants→ Common Stock (3,500,000)	3,500,000	Direct
Feb. 4, 2016	TOMZ	Common Stock Purchase Warrants→ Common Stock (3,000,000)	3,000,000	Direct