Michael Carroll Berg — SEC Insider Profile, Roles & Companies

Insider at

MARA selling Feb. 17, 2021

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 19 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

19 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
March 31, 2021	MARA	C	21,285	$48.02	$1,022,106	56,312 Direct	+60.77%	Acquired	-76.6% (price as of 2026-10-02)
March 31, 2021	MARA	D	35,574	$48.02	$1,708,263	27,397 Direct	-56.49%	Disposed	-76.6% (price as of 2026-10-02)
Feb. 17, 2021	MARA	S	10,000	$46.20	$462,000	35,027 Direct	-22.21%	Disposed	-75.7% (price as of 2026-10-02)
Feb. 12, 2021	MARA	S	10,000	$39.56	$395,600	45,027 Direct	-18.17%	Disposed	-71.6% (price as of 2026-10-02)
Feb. 10, 2021	MARA	C	13,420	$2.19	$29,390	55,027 Direct	+32.25%	Acquired	412.8% (price as of 2026-10-02)
Feb. 10, 2021	MARA	D	13,699	$2.19	$30,001	62,971 Direct	-17.87%	Disposed	412.8% (price as of 2026-10-02)
Dec. 31, 2020	MARA	C	16,626	$10.44	$173,575	41,607 Direct	+66.55%	Acquired	7.6% (price as of 2026-10-02)
Dec. 31, 2020	MARA	D	21,875	$1.96	$42,875	21,875 Direct	-50.00%	Disposed	473.0% (price as of 2026-10-02)
Dec. 31, 2020	MARA	A	54,795	$2.19	$120,001	76,670 Direct	+250.49%	Acquired	412.8% (price as of 2026-10-02)
Dec. 1, 2020	MARA	S	7,500	$6.15	$46,125	12,481 Direct	-37.54%	Disposed	82.6% (price as of 2026-10-02)
Sept. 30, 2020	MARA	C	6,250	$1.96	$12,250	24,981 Direct	+33.37%	Acquired	473.0% (price as of 2026-10-02)
Sept. 30, 2020	MARA	D	6,250	$1.96	$12,250	43,750 Direct	-12.50%	Disposed	473.0% (price as of 2026-10-02)
Sept. 30, 2020	MARA	C	10,081	$1.96	$19,759	19,981 Direct	+101.83%	Acquired	473.0% (price as of 2026-10-02)
Sept. 30, 2020	MARA	D	15,625	$1.96	$30,625	31,250 Direct	-33.33%	Disposed	473.0% (price as of 2026-10-02)
June 30, 2020	MARA	C	6,250	$0.91	$5,688	18,731 Direct	+50.08%	Acquired	1134.1% (price as of 2026-10-02)
June 30, 2020	MARA	D	6,250	$0.91	$5,688	50,000 Direct	-11.11%	Disposed	1134.1% (price as of 2026-10-02)
June 30, 2020	MARA	C	9,900	$0.91	$9,009	9,900 Direct	·	Acquired	1134.1% (price as of 2026-10-02)
June 30, 2020	MARA	D	15,625	$0.91	$14,219	46,875 Direct	-25.00%	Disposed	1134.1% (price as of 2026-10-02)
May 4, 2020	MARA	A	25,000	$2.04	$51,000	56,250 Direct	+80.00%	Acquired	450.5% (price as of 2026-10-02)
May 4, 2020	MARA	A	62,500	·	·	62,500 Direct	·	Acquired	(price as of 2026-10-02)
Aug. 12, 2019	MARA	A	50,000	·	·	100,000 Direct	+100.00%	Acquired	(price as of 2026-10-02)
Oct. 12, 2018	MARA	A	50,000	·	·	50,000 Direct	·	Acquired	(price as of 2026-10-02)

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
March 31, 2021	MARA	RSUs	Common (35,574)	·	·	35,574	Disposed
Feb. 10, 2021	MARA	RSUs	Common (13,699)	·	·	13,699	Disposed
Dec. 31, 2020	MARA	RSUs	Common (21,875)	·	·	21,875	Disposed
Dec. 31, 2020	MARA	RSUs	Common (54,795)	·	·	54,795	Acquired
Sept. 30, 2020	MARA	RSUs	Common (6,250)	·	·	6,250	Disposed
Sept. 30, 2020	MARA	RSUs	Common (15,625)	$0.00	May 4, 2021	15,625	Disposed
June 30, 2020	MARA	RSUs	Common (6,250)	·	·	6,250	Disposed
June 30, 2020	MARA	RSUs	Common (15,625)	$0.00	May 4, 2021	15,625	Disposed
May 4, 2020	MARA	RSUs	Common (25,000)	·	·	25,000	Acquired
May 4, 2020	MARA	RSUs	Common (62,500)	$0.00	May 4, 2021	62,500	Acquired
Aug. 12, 2019	MARA	Employee Stock Option (right to buy)	Common (50,000)	$2.04	Aug. 12, 2024	50,000	Acquired
Oct. 12, 2018	MARA	Employee Stock Option (right to buy)	Common (50,000)	$0.58	Oct. 12, 2028	50,000	Acquired

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