Mortimer Berkowitz III

Insider

First SEC filing: June 2, 2006 · Latest: June 12, 2026

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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

ATEC buying June 9, 2022

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 37 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

37 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 10, 2026	ATEC	A	32,012	—	—	650,062 Direct	+5.18%	Acquired	(price as of 2026-08-20)
June 9, 2022	ATEC	P	16,000	$7.20	$115,200	555,121 Direct	+2.97%	Acquired	33.5% (price as of 2026-08-20)
June 9, 2022	ATEC	M	200,000	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
June 9, 2022	ATEC	M	200,000	$2.00	$400,000	526,985 Indirect	+61.16%	Acquired	380.5% (price as of 2026-08-20)
June 7, 2022	ATEC	M	200,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
June 7, 2022	ATEC	M	200,000	$2.00	$400,000	539,121 Direct	+58.98%	Acquired	380.5% (price as of 2026-08-20)
June 15, 2018	ATEC	J	8,396	—	—	339,121 Direct	+2.54%	Acquired	(price as of 2026-08-20)
June 15, 2018	ATEC	J	2,807	—	—	330,725 Direct	+0.86%	Acquired	(price as of 2026-08-20)
June 15, 2018	ATEC	J	1,742,546	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
June 15, 2018	ATEC	J	906,431	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
May 17, 2018	ATEC	M	400	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
May 17, 2018	ATEC	M	400	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 17, 2018	ATEC	M	126,985	—	—	326,985 Indirect	+63.49%	Acquired	(price as of 2026-08-20)
May 17, 2018	ATEC	M	126,985	—	—	327,918 Direct	+63.20%	Acquired	(price as of 2026-08-20)
March 8, 2018	ATEC	A	107,937	—	—	107,937 Indirect	—	Acquired	(price as of 2026-08-20)
March 8, 2018	ATEC	A	107,937	—	—	107,937 Direct	—	Acquired	(price as of 2026-08-20)
March 8, 2018	ATEC	A	400	$1000.00	$400,000	400 Indirect	—	Acquired	-99.0% (price as of 2026-08-20)
March 8, 2018	ATEC	A	400	$1000.00	$400,000	400 Direct	—	Acquired	-99.0% (price as of 2026-08-20)
Oct. 27, 2017	ATEC	M	200,000	—	—	200,933 Direct	+21436.23%	Acquired	(price as of 2026-08-20)
Oct. 27, 2017	ATEC	M	200,000	—	—	200,000 Indirect	—	Acquired	(price as of 2026-08-20)
Oct. 27, 2017	ATEC	M	400	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Oct. 27, 2017	ATEC	M	400	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
March 29, 2017	ATEC	A	200,000	—	—	200,000 Indirect	—	Acquired	(price as of 2026-08-20)
March 29, 2017	ATEC	A	200,000	—	—	200,000 Direct	—	Acquired	(price as of 2026-08-20)
March 29, 2017	ATEC	A	400	$1000.00	$400,000	400 Indirect	—	Acquired	-99.0% (price as of 2026-08-20)
March 29, 2017	ATEC	A	400	$1000.00	$400,000	400 Direct	—	Acquired	-99.0% (price as of 2026-08-20)
Nov. 28, 2012	ATEC	S	100,000	$1.51	$151,000	10,777,173 Indirect	-0.92%	Disposed	-47.0% (price as of 2026-08-20)
Nov. 28, 2012	ATEC	S	100,000	$1.51	$151,000	21,010,565 Indirect	-0.47%	Disposed	-47.0% (price as of 2026-08-20)
March 7, 2012	ATEC	J	1,344,179	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
April 21, 2010	ATEC	S	9,200,000	$4.75	$43,700,000	33,331,917 Indirect	-21.63%	Disposed	-83.1% (price as of 2026-08-20)
March 26, 2010	ATEC	A	22,500,271	—	—	42,531,917 Indirect	+112.32%	Acquired	(price as of 2026-08-20)
June 4, 2009	ATEC	P	3,937,007	$2.54	$9,999,998	20,031,646 Indirect	+24.46%	Acquired	-68.5% (price as of 2026-08-20)
Aug. 8, 2008	ATEC	P	5,000	$4.96	$24,800	16,105,839 Direct	+0.03%	Acquired	-83.9% (price as of 2026-08-20)
Nov. 20, 2007	ATEC	A	12,500	$4.19	$52,375	16,100,839 Direct	-0.08%	Disposed	-80.9% (price as of 2026-08-20)
Sept. 26, 2007	ATEC	P	2,750,000	$3.45	$9,487,500	16,100,839 Indirect	+20.60%	Acquired	-76.8% (price as of 2026-08-20)
June 14, 2007	ATEC	P	4,200	$3.60	$15,120	13,350,839 Direct	+0.03%	Acquired	-77.8% (price as of 2026-08-20)
Aug. 11, 2006	ATEC	P	1,800	$5.89	$10,602	13,346,639 Direct	+0.01%	Acquired	-86.4% (price as of 2026-08-20)
Aug. 10, 2006	ATEC	P	200	$5.49	$1,098	13,346,639 Direct	0.00%	Acquired	-85.4% (price as of 2026-08-20)
June 7, 2006	ATEC	J	154,009	—	—	13,344,639 Indirect	+1.17%	Acquired	(price as of 2026-08-20)
June 7, 2006	ATEC	J	1,557,200	—	—	1,557,200 Indirect	—	Acquired	(price as of 2026-08-20)
June 7, 2006	ATEC	C	3,258,664	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
June 7, 2006	ATEC	J	131,277	—	—	1,458,631 Indirect	+9.89%	Acquired	(price as of 2026-08-20)
June 7, 2006	ATEC	J	152,368	—	—	13,326,406 Indirect	+1.16%	Acquired	(price as of 2026-08-20)
June 7, 2006	ATEC	C	11,633,430	—	—	13,174,038 Indirect	+755.12%	Acquired	(price as of 2026-08-20)
June 7, 2006	ATEC	J	1,327,354	—	—	1,327,354 Indirect	—	Acquired	(price as of 2026-08-20)
June 7, 2006	ATEC	J	1,540,608	—	—	1,540,608 Indirect	—	Acquired	(price as of 2026-08-20)
June 7, 2006	ATEC	J	4,000,000	—	—	0 Indirect	-100.00%	Disposed	(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
June 9, 2022	ATEC	Warrants (right to buy)	Common Stock (200,000)	$2.00	June 15, 2022	200,000	Disposed
June 7, 2022	ATEC	Warrants (right to buy)	Common Stock (200,000)	$2.00	June 15, 2022	200,000	Disposed
May 17, 2018	ATEC	Series B Convertible Preferred Stock	Common Stock (126,985)	—	—	400	Disposed
May 17, 2018	ATEC	Series B Convertible Preferred Stock	Common Stock (126,985)	—	—	400	Disposed
March 8, 2018	ATEC	Warrants (right to buy)	Common Stock (107,937)	$3.50	—	107,937	Acquired
March 8, 2018	ATEC	Warrants (right to buy)	Common Stock (107,937)	$3.50	—	107,937	Acquired
March 8, 2018	ATEC	Series B Convertible Preferred Stock	Common Stock (126,985)	—	—	400	Acquired
March 8, 2018	ATEC	Series B Convertible Preferred Stock	Common Stock (126,985)	—	—	400	Acquired
Oct. 27, 2017	ATEC	Series A Convertible Preferred Stock	Common Stock (200,000)	$0.00	—	400	Disposed
Oct. 27, 2017	ATEC	Series A Convertible Preferred Stock	Common Stock (200,000)	$0.00	—	400	Disposed
March 29, 2017	ATEC	Warrants (right to buy)	Common Stock (200,000)	$2.00	—	200,000	Acquired
March 29, 2017	ATEC	Warrants (right to buy)	Common Stock (200,000)	$2.00	—	200,000	Acquired
March 29, 2017	ATEC	Series A Convertible Preferred Stock	Common Stock (200,000)	$2.00	—	400	Acquired
March 29, 2017	ATEC	Series A Convertible Preferred Stock	Common Stock (200,000)	$2.00	—	400	Acquired
June 7, 2006	ATEC	Series B Common Stock	Common Stock (11,633,430)	—	—	3,258,664	Disposed

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

Initial ownership (Form 3) 3 holdings

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

Date	Ticker	Security	Shares	Ownership
June 2, 2006	ATEC	Series B Preferred Stock	4,000,000	Indirect
June 2, 2006	ATEC	Common Stock	3	Indirect
June 2, 2006	ATEC	Series B Common Stock→ Common Stock (3,258,664)	3,258,664	Indirect