Steven R Mitchell

Insider

First SEC filing: April 13, 2021 · Latest: April 13, 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.
Initial holdings The stakes this person held when they first started reporting.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 26 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

26 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
July 5, 2026	ALKT	A	533	—	—	98,026 Direct	+0.55%	Acquired	(price as of 2026-08-20)
May 13, 2026	ASPN	A	8,706	—	—	8,706 Direct	—	Acquired	(price as of 2026-08-20)
May 13, 2026	ASPN	A	10,370	—	—	156,898 Direct	+7.08%	Acquired	(price as of 2026-08-20)
April 30, 2025	ASPN	A	9,105	—	—	9,105 Direct	—	Acquired	(price as of 2026-08-20)
April 30, 2025	ASPN	A	10,370	—	—	146,528 Direct	+7.62%	Acquired	(price as of 2026-08-20)
May 30, 2024	ASPN	A	1,657	—	—	1,657 Direct	—	Acquired	(price as of 2026-08-20)
May 30, 2024	ASPN	A	1,898	—	—	136,158 Direct	+1.41%	Acquired	(price as of 2026-08-20)
Sept. 7, 2023	ASPN	P	7,541	$6.50	$49,016	134,260 Direct	+5.95%	Acquired	-16.9% (price as of 2026-08-20)
Sept. 5, 2023	ASPN	P	50,000	$6.17	$308,500	126,719 Direct	+65.17%	Acquired	-12.5% (price as of 2026-08-20)
June 1, 2023	ASPN	A	7,712	—	—	7,712 Direct	—	Acquired	(price as of 2026-08-20)
June 1, 2023	ASPN	A	7,488	—	—	76,719 Direct	+10.82%	Acquired	(price as of 2026-08-20)
June 2, 2022	ASPN	A	3,178	—	—	3,178 Direct	—	Acquired	(price as of 2026-08-20)
June 2, 2022	ASPN	A	2,699	—	—	69,231 Direct	+4.06%	Acquired	(price as of 2026-08-20)
June 1, 2021	ASPN	A	2,489	—	—	66,532 Direct	+3.89%	Acquired	(price as of 2026-08-20)
June 1, 2021	ASPN	A	3,088	—	—	3,088 Direct	—	Acquired	(price as of 2026-08-20)
June 18, 2020	ASPN	A	9,817	—	—	9,817 Direct	—	Acquired	(price as of 2026-08-20)
June 18, 2020	ASPN	A	7,511	—	—	64,043 Direct	+13.29%	Acquired	(price as of 2026-08-20)
June 19, 2019	ASPN	A	11,950	—	—	11,950 Direct	—	Acquired	(price as of 2026-08-20)
June 19, 2019	ASPN	A	8,388	—	—	56,532 Direct	+17.42%	Acquired	(price as of 2026-08-20)
June 20, 2018	ASPN	A	13,517	—	—	13,517 Direct	—	Acquired	(price as of 2026-08-20)
June 20, 2018	ASPN	A	9,677	—	—	48,144 Direct	+25.16%	Acquired	(price as of 2026-08-20)
June 14, 2017	ASPN	A	17,019	—	—	17,019 Direct	—	Acquired	(price as of 2026-08-20)
June 14, 2017	ASPN	A	12,289	—	—	38,467 Direct	+46.94%	Acquired	(price as of 2026-08-20)
June 24, 2016	ASPN	A	14,799	—	—	14,799 Direct	—	Acquired	(price as of 2026-08-20)
June 24, 2016	ASPN	A	10,736	—	—	26,178 Direct	+69.52%	Acquired	(price as of 2026-08-20)
June 17, 2015	ASPN	A	10,228	—	—	10,228 Direct	—	Acquired	(price as of 2026-08-20)
June 17, 2015	ASPN	A	7,715	—	—	15,442 Direct	+99.84%	Acquired	(price as of 2026-08-20)
June 12, 2014	ASPN	A	7,727	—	—	7,727 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
May 13, 2026	ASPN	Stock Options (Right to Buy)	Common Stock (8,706)	$5.40	May 13, 2036	8,706	Acquired
April 30, 2025	ASPN	Stock Options (Right to Buy)	Common Stock (9,105)	$5.40	April 30, 2035	9,105	Acquired
May 30, 2024	ASPN	Stock Options (Right to Buy)	Common Stock (1,657)	$29.50	May 30, 2034	1,657	Acquired
June 1, 2023	ASPN	Stock Option (Right-to-Buy)	Common Stock (7,712)	$6.81	June 1, 2033	7,712	Acquired
June 2, 2022	ASPN	Stock Option (Right-to-Buy)	Common Stock (3,178)	$18.89	June 2, 2032	3,178	Acquired
June 1, 2021	ASPN	Stock Option (Right-to-Buy)	Common Stock (3,088)	$20.49	June 1, 2031	3,088	Acquired
June 18, 2020	ASPN	Stock Option (right to buy)	Common Stock (9,817)	$6.79	June 18, 2030	9,817	Acquired
June 19, 2019	ASPN	Stock Option (right to buy)	Common Stock (11,950)	$6.08	June 19, 2029	11,950	Acquired
June 20, 2018	ASPN	Stock Option (right to buy)	Common Stock (13,517)	$5.27	June 28, 2028	13,517	Acquired
June 14, 2017	ASPN	Stock Option (right to buy)	Common Stock (17,019)	$4.15	June 14, 2027	17,019	Acquired
June 24, 2016	ASPN	Stock Option (right to buy)	Common Stock (14,799)	$4.75	June 24, 2026	14,799	Acquired
June 17, 2015	ASPN	Stock Option (right to buy)	Common Stock (10,228)	$6.61	June 17, 2025	10,228	Acquired

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

Initial ownership (Form 3) 5 holdings

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

Date	Ticker	Security	Shares	Ownership
April 13, 2021	ALKT	Series A Preferred Stock→ Common Stock (81,126)	81,126	Indirect
April 13, 2021	ALKT	Series B Preferred Stock→ Common Stock (1,875,000)	1,875,000	Indirect
April 13, 2021	ALKT	Series C Preferred Stock→ Common Stock (9,131,172)	9,131,172	Indirect
April 13, 2021	ALKT	Series E Preferred Stock→ Common Stock (1,520,763)	1,520,763	Indirect
April 13, 2021	ALKT	Series E Preferred Stock→ Common Stock (35,759)	35,759	Direct