David H Mowry

Insider

First SEC filing: June 19, 2020 · Latest: June 19, 2020

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 7 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

7 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 29, 2022	ATEC	S	4,370	$7.85	$34,304	91,973 Direct	-4.54%	Disposed	22.4% (price as of 2026-08-20)
June 15, 2022	ATEC	A	18,546	—	—	96,343 Direct	+23.84%	Acquired	(price as of 2026-08-20)
Nov. 16, 2021	ATEC	S	14,254	$12.25	$174,612	77,797 Direct	-15.48%	Disposed	-21.6% (price as of 2026-08-20)
June 16, 2021	ATEC	A	10,221	—	—	92,051 Direct	+12.49%	Acquired	(price as of 2026-08-20)
June 17, 2020	ATEC	A	24,313	—	—	81,830 Direct	+42.27%	Acquired	(price as of 2026-08-20)
June 21, 2019	ATEC	A	18,086	—	—	57,517 Direct	+45.87%	Acquired	(price as of 2026-08-20)
July 30, 2018	ATEC	A	20,492	—	—	39,431 Direct	+108.20%	Acquired	(price as of 2026-08-20)
April 25, 2017	ATEC	A	28,090	—	—	28,090 Direct	—	Acquired	(price as of 2026-08-20)
April 25, 2017	ATEC	A	18,939	—	—	18,939 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.

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

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
April 25, 2017	ATEC	Stock Option (right to buy)	Common Stock (28,090)	$1.98	April 25, 2027	28,090	Acquired

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