Scot M Roberts

Insider

First SEC filing: Feb. 3, 2021 · Latest: Feb. 3, 2021

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.

Insider at

ALT selling July 5, 2022

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 76 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

76 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
July 31, 2026	ALT	A	875	$2.41	$2,109	113,699 Direct	+0.78%	Acquired	24.9% (price as of 2026-08-21)
July 31, 2025	ALT	A	846	$3.14	$2,656	74,066 Direct	+1.16%	Acquired	-4.2% (price as of 2026-08-21)
Feb. 2, 2025	ALT	M	7,775	—	—	7,775 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 2, 2025	ALT	F	2,316	$6.64	$15,378	73,220 Direct	-3.07%	Disposed	-54.7% (price as of 2026-08-21)
Feb. 2, 2025	ALT	M	7,775	—	—	75,536 Direct	+11.47%	Acquired	(price as of 2026-08-21)
Feb. 1, 2025	ALT	M	6,166	—	—	0 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 1, 2025	ALT	F	1,801	$6.64	$11,959	67,761 Direct	-2.59%	Disposed	-54.7% (price as of 2026-08-21)
Feb. 1, 2025	ALT	M	6,166	—	—	69,562 Direct	+9.73%	Acquired	(price as of 2026-08-21)
Jan. 31, 2025	ALT	A	3,184	$5.18	$16,493	63,396 Direct	+5.29%	Acquired	-41.9% (price as of 2026-08-21)
Jan. 30, 2025	ALT	M	9,275	—	—	18,550 Direct	+100.00%	Acquired	(price as of 2026-08-21)
Jan. 30, 2025	ALT	F	2,709	$7.00	$18,963	60,212 Direct	-4.31%	Disposed	-57.0% (price as of 2026-08-21)
Jan. 30, 2025	ALT	M	9,275	—	—	62,921 Direct	+17.29%	Acquired	(price as of 2026-08-21)
Jan. 27, 2025	ALT	A	63,400	—	—	63,400 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 27, 2025	ALT	A	183,600	—	—	183,600 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 25, 2025	ALT	M	14,600	—	—	43,800 Direct	+50.00%	Acquired	(price as of 2026-08-21)
Jan. 25, 2025	ALT	F	4,264	$6.98	$29,763	53,646 Direct	-7.36%	Disposed	-56.9% (price as of 2026-08-21)
Jan. 25, 2025	ALT	M	14,600	—	—	57,910 Direct	+33.71%	Acquired	(price as of 2026-08-21)
July 31, 2024	ALT	A	650	$5.41	$3,516	43,310 Direct	+1.52%	Acquired	-44.4% (price as of 2026-08-21)
Feb. 2, 2024	ALT	M	7,775	—	—	15,550 Direct	-33.33%	Disposed	(price as of 2026-08-21)
Feb. 2, 2024	ALT	F	2,330	$9.32	$21,716	42,660 Direct	-5.18%	Disposed	-67.7% (price as of 2026-08-21)
Feb. 2, 2024	ALT	M	7,775	—	—	44,990 Direct	+20.89%	Acquired	(price as of 2026-08-21)
Feb. 1, 2024	ALT	M	6,166	—	—	6,166 Direct	-50.00%	Disposed	(price as of 2026-08-21)
Feb. 1, 2024	ALT	F	1,801	$9.88	$17,794	37,215 Direct	-4.62%	Disposed	-69.5% (price as of 2026-08-21)
Feb. 1, 2024	ALT	M	6,166	—	—	39,016 Direct	+18.77%	Acquired	(price as of 2026-08-21)
Jan. 31, 2024	ALT	A	5,860	$2.69	$15,763	32,850 Direct	+21.71%	Acquired	11.9% (price as of 2026-08-21)
Jan. 30, 2024	ALT	M	9,275	—	—	27,825 Direct	-25.00%	Disposed	(price as of 2026-08-21)
Jan. 30, 2024	ALT	F	2,709	$9.80	$26,548	26,990 Direct	-9.12%	Disposed	-69.3% (price as of 2026-08-21)
Jan. 30, 2024	ALT	M	9,275	—	—	29,699 Direct	+45.41%	Acquired	(price as of 2026-08-21)
Jan. 25, 2024	ALT	A	58,400	—	—	58,400 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 25, 2024	ALT	A	163,200	—	—	163,200 Direct	—	Acquired	(price as of 2026-08-21)
July 31, 2023	ALT	A	568	$2.81	$1,596	20,424 Direct	+2.86%	Acquired	7.1% (price as of 2026-08-21)
Feb. 2, 2023	ALT	M	7,775	—	—	23,325 Direct	-25.00%	Disposed	(price as of 2026-08-21)
Feb. 2, 2023	ALT	F	2,375	$15.04	$35,720	19,856 Direct	-10.68%	Disposed	-80.0% (price as of 2026-08-21)
Feb. 2, 2023	ALT	M	7,775	—	—	22,231 Direct	+53.78%	Acquired	(price as of 2026-08-21)
Feb. 1, 2023	ALT	M	6,166	—	—	12,332 Direct	-33.33%	Disposed	(price as of 2026-08-21)
Feb. 1, 2023	ALT	F	2,183	$13.78	$30,082	14,456 Direct	-13.12%	Disposed	-78.2% (price as of 2026-08-21)
Feb. 1, 2023	ALT	M	6,166	—	—	16,639 Direct	+58.88%	Acquired	(price as of 2026-08-21)
Jan. 31, 2023	ALT	A	1,436	$10.21	$14,662	10,473 Direct	+15.89%	Acquired	-70.5% (price as of 2026-08-21)
Jan. 30, 2023	ALT	A	37,100	—	—	37,100 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 30, 2023	ALT	A	105,000	—	—	105,000 Direct	—	Acquired	(price as of 2026-08-21)
July 31, 2022	ALT	A	732	$6.86	$5,022	9,037 Direct	+8.81%	Acquired	-56.1% (price as of 2026-08-21)
July 5, 2022	ALT	M	787	—	—	14,250 Direct	-5.23%	Disposed	(price as of 2026-08-21)
July 5, 2022	ALT	S 10b5-1	10,182	$12.00	$122,184	8,305 Direct	-55.08%	Disposed	-74.9% (price as of 2026-08-21)
July 5, 2022	ALT	M	787	$2.95	$2,322	18,487 Direct	+4.45%	Acquired	2.0% (price as of 2026-08-21)
July 1, 2022	ALT	M	22,963	—	—	15,037 Direct	-60.43%	Disposed	(price as of 2026-08-21)
July 1, 2022	ALT	M	4,019	—	—	8,750 Direct	-31.47%	Disposed	(price as of 2026-08-21)
July 1, 2022	ALT	S 10b5-1	26,982	$12.00	$323,784	17,700 Direct	-60.39%	Disposed	-74.9% (price as of 2026-08-21)
July 1, 2022	ALT	M	22,963	$2.95	$67,741	44,682 Direct	+105.73%	Acquired	2.0% (price as of 2026-08-21)
July 1, 2022	ALT	M	4,019	$2.60	$10,449	21,719 Direct	+22.71%	Acquired	15.7% (price as of 2026-08-21)
June 29, 2022	ALT	M	5,462	—	—	12,769 Direct	-29.96%	Disposed	(price as of 2026-08-21)
June 29, 2022	ALT	S 10b5-1	5,462	$12.00	$65,544	17,700 Direct	-23.58%	Disposed	-74.9% (price as of 2026-08-21)
June 29, 2022	ALT	M	5,462	$2.60	$14,201	23,162 Direct	+30.86%	Acquired	15.7% (price as of 2026-08-21)
June 27, 2022	ALT	M	11,769	—	—	18,231 Direct	-39.23%	Disposed	(price as of 2026-08-21)
June 27, 2022	ALT	M	25,583	—	—	35,817 Direct	-41.67%	Disposed	(price as of 2026-08-21)
June 27, 2022	ALT	S 10b5-1	37,352	$12.00	$448,224	17,700 Direct	-67.85%	Disposed	-74.9% (price as of 2026-08-21)
June 27, 2022	ALT	M	11,769	$2.60	$30,599	55,052 Direct	+27.19%	Acquired	15.7% (price as of 2026-08-21)
June 27, 2022	ALT	M	25,583	$1.92	$49,119	43,283 Direct	+144.54%	Acquired	56.7% (price as of 2026-08-21)
Feb. 2, 2022	ALT	A	31,100	—	—	31,100 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 2, 2022	ALT	A	91,600	—	—	91,600 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 1, 2022	ALT	M	6,166	—	—	18,498 Direct	-25.00%	Disposed	(price as of 2026-08-21)
Feb. 1, 2022	ALT	F	2,183	$7.98	$17,420	17,700 Direct	-10.98%	Disposed	-62.3% (price as of 2026-08-21)
Feb. 1, 2022	ALT	M	6,166	—	—	19,883 Direct	+44.95%	Acquired	(price as of 2026-08-21)
Jan. 31, 2022	ALT	A	2,106	$6.86	$14,447	13,717 Direct	+18.14%	Acquired	-56.1% (price as of 2026-08-21)
July 31, 2021	ALT	A	1,750	$7.71	$13,492	11,611 Direct	+17.75%	Acquired	-61.0% (price as of 2026-08-21)
Feb. 1, 2021	ALT	A	24,664	—	—	24,664 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 1, 2021	ALT	A	90,000	—	—	90,000 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 31, 2021	ALT	A	467	$12.14	$5,669	9,861 Direct	+4.97%	Acquired	-75.2% (price as of 2026-08-21)
July 31, 2020	ALT	A	3,859	$1.46	$5,634	9,394 Direct	+69.72%	Acquired	106.1% (price as of 2026-08-21)
Jan. 31, 2020	ALT	A	3,698	$1.46	$5,399	5,535 Direct	+201.31%	Acquired	106.1% (price as of 2026-08-21)
Jan. 2, 2020	ALT	A	61,400	—	—	61,400 Direct	—	Acquired	(price as of 2026-08-21)
March 26, 2019	ALT	A	38,000	—	—	38,000 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 2, 2019	ALT	A	30,000	—	—	30,000 Direct	—	Acquired	(price as of 2026-08-21)
May 21, 2018	ALT	M	55,120	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 21, 2018	ALT	A	50,016	—	—	50,016 Direct	—	Acquired	(price as of 2026-08-21)
May 21, 2018	ALT	M	55,120	$0.08	$4,410	55,120 Direct	—	Acquired	25.4% (price as of 2026-08-21)
Sept. 22, 2017	ALT	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-21)
June 6, 2017	ALT	P	449	$4.42	$1,985	449 Indirect	—	Acquired	-97.7% (price as of 2026-08-21)
May 4, 2017	ALT	A	11,235	—	—	11,235 Direct	—	Acquired	(price as of 2026-08-21)
May 4, 2017	ALT	A	8,956	—	—	8,956 Direct	—	Acquired	(price as of 2026-08-21)
May 4, 2017	ALT	A	8,956	—	—	8,956 Direct	—	Acquired	(price as of 2026-08-21)
May 4, 2017	ALT	A	55,120	—	—	55,120 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
Feb. 2, 2025	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (7,775)	—	—	7,775	Acquired
Feb. 1, 2025	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (6,166)	—	—	6,166	Acquired
Jan. 30, 2025	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (9,275)	—	—	9,275	Acquired
Jan. 27, 2025	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (63,400)	—	—	63,400	Acquired
Jan. 27, 2025	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (183,600)	$7.00	Jan. 27, 2035	183,600	Acquired
Jan. 25, 2025	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (14,600)	—	—	14,600	Acquired
Feb. 2, 2024	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (7,775)	—	—	7,775	Disposed
Feb. 1, 2024	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (6,166)	—	—	6,166	Disposed
Jan. 30, 2024	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (9,275)	—	—	9,275	Disposed
Jan. 25, 2024	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (58,400)	—	—	58,400	Acquired
Jan. 25, 2024	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (163,200)	$9.28	Jan. 25, 2034	163,200	Acquired
Feb. 2, 2023	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (7,775)	—	—	7,775	Disposed
Feb. 1, 2023	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (6,166)	—	—	6,166	Disposed
Jan. 30, 2023	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (37,100)	—	—	37,100	Acquired
Jan. 30, 2023	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (105,000)	$12.88	Jan. 30, 2033	105,000	Acquired
July 5, 2022	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (787)	$2.95	March 26, 2029	787	Disposed
July 1, 2022	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (22,963)	$2.95	March 26, 2029	22,963	Disposed
July 1, 2022	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (4,019)	$2.60	Jan. 2, 2029	4,019	Disposed
June 29, 2022	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (5,462)	$2.60	Jan. 2, 2029	5,462	Disposed
June 27, 2022	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (30,000)	$2.60	Jan. 2, 2029	11,769	Disposed
June 27, 2022	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (61,400)	$1.92	Jan. 2, 2030	25,583	Disposed
Feb. 2, 2022	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (31,100)	—	—	31,100	Acquired
Feb. 2, 2022	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (91,600)	$7.53	Feb. 2, 2032	91,600	Acquired
Feb. 1, 2022	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (6,166)	—	—	6,166	Disposed
Feb. 1, 2021	ALT	Restricted Stock Units	Common Stock, par value $0.0001 (24,664)	—	—	24,664	Acquired
Feb. 1, 2021	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (90,000)	$16.71	Feb. 1, 2031	90,000	Acquired
Jan. 2, 2020	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (61,400)	$1.92	Jan. 2, 2030	61,400	Acquired
March 26, 2019	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (38,000)	$2.95	March 26, 2029	38,000	Acquired
Jan. 2, 2019	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (30,000)	$2.60	Jan. 2, 2029	30,000	Acquired
May 21, 2018	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (55,120)	$0.08	Dec. 5, 2022	55,120	Disposed
May 21, 2018	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (50,016)	$0.44	May 21, 2028	50,016	Acquired
Sept. 22, 2017	ALT	Stock Options (option to buy)	Common Stock, par value $0.0001 (50,000)	$2.48	Sept. 22, 2027	50,000	Acquired
May 4, 2017	ALT	Stock Option (option to buy)	Common Stock, par value $0.0001 (11,235)	$13.38	April 7, 2026	11,235	Acquired
May 4, 2017	ALT	Stock Option (option to buy)	Common Stock, par value $0.0001 (8,956)	$2.59	Dec. 2, 2024	8,956	Acquired
May 4, 2017	ALT	Stock Option (option to buy)	Common Stock, par value $0.0001 (8,956)	$0.59	Dec. 4, 2023	8,956	Acquired
May 4, 2017	ALT	Stock Option (option to buy)	Common Stock, par value $0.0001 (55,120)	$0.08	Dec. 5, 2022	55,120	Acquired

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