James Karrels

Insider

First SEC filing: Oct. 9, 2013 · Latest: Oct. 9, 2013

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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

MGNX selling March 4, 2024

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 60 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

60 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Feb. 15, 2025	MGNX	M	14,998	—	—	14,999 Direct	-50.00%	Disposed	(price as of 2026-08-20)
Feb. 15, 2025	MGNX	F	5,790	$2.56	$14,822	186,801 Direct	-3.01%	Disposed	62.3% (price as of 2026-08-20)
Feb. 15, 2025	MGNX	M	14,998	—	—	192,591 Direct	+8.45%	Acquired	(price as of 2026-08-20)
Feb. 8, 2025	MGNX	M	10,002	—	—	19,998 Direct	-33.34%	Disposed	(price as of 2026-08-20)
Feb. 8, 2025	MGNX	F	3,861	$2.60	$10,039	177,593 Direct	-2.13%	Disposed	59.8% (price as of 2026-08-20)
Feb. 8, 2025	MGNX	M	10,002	—	—	181,454 Direct	+5.83%	Acquired	(price as of 2026-08-20)
Feb. 7, 2025	MGNX	A	19,000	—	—	19,000 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 7, 2025	MGNX	A	113,000	—	—	113,000 Direct	—	Acquired	(price as of 2026-08-20)
March 4, 2024	MGNX	S 10b5-1	30,000	$20.50	$615,000	171,452 Direct	-14.89%	Disposed	-79.7% (price as of 2026-08-20)
Feb. 15, 2024	MGNX	M	15,003	—	—	29,997 Direct	-33.34%	Disposed	(price as of 2026-08-20)
Feb. 15, 2024	MGNX	F	5,327	$17.40	$92,690	201,452 Direct	-2.58%	Disposed	-76.1% (price as of 2026-08-20)
Feb. 15, 2024	MGNX	M	15,003	—	—	206,779 Direct	+7.82%	Acquired	(price as of 2026-08-20)
Feb. 8, 2024	MGNX	A	30,000	—	—	30,000 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 8, 2024	MGNX	A	80,000	—	—	80,000 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 15, 2023	MGNX	A	45,000	—	—	45,000 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 15, 2023	MGNX	A	180,000	—	—	180,000 Direct	—	Acquired	(price as of 2026-08-20)
June 15, 2022	MGNX	P	40,000	$2.47	$98,800	191,776 Direct	+26.35%	Acquired	68.2% (price as of 2026-08-20)
March 28, 2022	MGNX	M	8,316	$1.51	$12,557	0 Direct	-100.00%	Disposed	175.2% (price as of 2026-08-20)
March 28, 2022	MGNX	M	8,316	$1.51	$12,557	151,776 Direct	+5.80%	Acquired	175.2% (price as of 2026-08-20)
Feb. 22, 2022	MGNX	A	140,000	—	—	140,000 Direct	—	Acquired	(price as of 2026-08-20)
March 22, 2021	MGNX	S 10b5-1	15,000	$33.00	$495,000	143,460 Direct	-9.47%	Disposed	-87.4% (price as of 2026-08-20)
Feb. 22, 2021	MGNX	A	95,000	—	—	95,000 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 28, 2021	MGNX	M	5,000	$1.51	$7,550	158,460 Direct	+3.26%	Acquired	175.2% (price as of 2026-08-20)
Jan. 28, 2021	MGNX	M	5,000	—	—	8,316 Direct	-37.55%	Disposed	(price as of 2026-08-20)
Jan. 28, 2021	MGNX	M	1,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 28, 2021	MGNX	M	1,000	$0.94	$940	153,460 Direct	+0.66%	Acquired	342.0% (price as of 2026-08-20)
March 6, 2020	MGNX	M	4,473	—	—	1,000 Direct	-81.73%	Disposed	(price as of 2026-08-20)
March 6, 2020	MGNX	M	4,473	$0.94	$4,205	152,460 Direct	+3.02%	Acquired	342.0% (price as of 2026-08-20)
Feb. 20, 2020	MGNX	A	90,000	$11.50	$1,035,000	90,000 Direct	—	Acquired	-63.9% (price as of 2026-08-20)
Jan. 30, 2020	MGNX	M	5,180	—	—	5,473 Direct	-48.62%	Disposed	(price as of 2026-08-20)
Jan. 30, 2020	MGNX	M	7,320	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 30, 2020	MGNX	M	5,180	$0.94	$4,869	147,987 Direct	+3.63%	Acquired	342.0% (price as of 2026-08-20)
Jan. 30, 2020	MGNX	M	7,320	$0.94	$6,881	142,807 Direct	+5.40%	Acquired	342.0% (price as of 2026-08-20)
Feb. 21, 2019	MGNX	A	85,000	—	—	85,000 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 24, 2019	MGNX	M	2,000	—	—	7,320 Direct	-21.46%	Disposed	(price as of 2026-08-20)
Jan. 24, 2019	MGNX	M	5,326	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 24, 2019	MGNX	M	2,000	$0.94	$1,880	135,487 Direct	+1.50%	Acquired	342.0% (price as of 2026-08-20)
Jan. 24, 2019	MGNX	M	5,326	$0.94	$5,006	133,487 Direct	+4.16%	Acquired	342.0% (price as of 2026-08-20)
Jan. 8, 2019	MGNX	M	5,314	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 8, 2019	MGNX	M	5,314	$0.94	$4,995	128,161 Direct	+4.33%	Acquired	342.0% (price as of 2026-08-20)
Dec. 18, 2018	MGNX	M	5,000	$0.94	$4,700	122,847 Direct	+4.24%	Acquired	342.0% (price as of 2026-08-20)
Dec. 18, 2018	MGNX	M	5,000	—	—	5,314 Direct	-48.48%	Disposed	(price as of 2026-08-20)
Nov. 27, 2018	MGNX	M	3,000	—	—	1,420 Direct	-67.87%	Disposed	(price as of 2026-08-20)
Nov. 27, 2018	MGNX	M	3,000	$0.94	$2,820	117,847 Direct	+2.61%	Acquired	342.0% (price as of 2026-08-20)
March 5, 2018	MGNX	S 10b5-1	5,000	$31.00	$155,000	114,847 Direct	-4.17%	Disposed	-86.6% (price as of 2026-08-20)
March 2, 2018	MGNX	A	70,000	—	—	70,000 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 16, 2018	MGNX	M	6,516	$0.94	$6,125	119,847 Direct	+5.75%	Acquired	342.0% (price as of 2026-08-20)
Jan. 16, 2018	MGNX	M	6,516	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 29, 2017	MGNX	M	3,000	—	—	6,516 Direct	-31.53%	Disposed	(price as of 2026-08-20)
Dec. 29, 2017	MGNX	M	3,000	$0.94	$2,820	113,331 Direct	+2.72%	Acquired	342.0% (price as of 2026-08-20)
Sept. 5, 2017	MGNX	M	5,000	—	—	9,516 Direct	-34.44%	Disposed	(price as of 2026-08-20)
Sept. 5, 2017	MGNX	M	5,000	$0.94	$4,700	110,331 Direct	+4.75%	Acquired	342.0% (price as of 2026-08-20)
Feb. 15, 2017	MGNX	A	55,000	$20.53	$1,129,150	55,000 Direct	—	Acquired	-79.8% (price as of 2026-08-20)
Jan. 25, 2017	MGNX	M	5,000	—	—	14,516 Direct	-25.62%	Disposed	(price as of 2026-08-20)
Jan. 25, 2017	MGNX	M	5,000	$0.94	$4,700	105,331 Direct	+4.98%	Acquired	342.0% (price as of 2026-08-20)
Jan. 29, 2016	MGNX	D	10,000	—	—	19,516 Direct	+105.09%	Acquired	(price as of 2026-08-20)
Jan. 29, 2016	MGNX	M	10,000	$0.94	$9,400	100,331 Indirect	+11.07%	Acquired	342.0% (price as of 2026-08-20)
Dec. 18, 2015	MGNX	A	45,000	—	—	45,000 Direct	—	Acquired	(price as of 2026-08-20)
Oct. 7, 2015	MGNX	M	6,000	—	—	16,533 Direct	-26.63%	Disposed	(price as of 2026-08-20)
Oct. 7, 2015	MGNX	M	6,000	$0.94	$5,640	10,100 Direct	+146.34%	Acquired	342.0% (price as of 2026-08-20)
Dec. 24, 2014	MGNX	M	4,100	—	—	22,533 Direct	-15.39%	Disposed	(price as of 2026-08-20)
Dec. 24, 2014	MGNX	M	4,100	$0.94	$3,854	4,100 Direct	—	Acquired	342.0% (price as of 2026-08-20)
Dec. 12, 2014	MGNX	A	40,000	—	—	40,000 Direct	—	Acquired	(price as of 2026-08-20)
Oct. 9, 2013	MGNX	A	48,791	—	—	48,791 Direct	-50.00%	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
Feb. 15, 2025	MGNX	Restricted Stock Unit	Common Stock (14,998)	—	—	14,998	Disposed
Feb. 8, 2025	MGNX	Restricted Stock Unit	Common Stock (10,002)	—	—	10,002	Disposed
Feb. 7, 2025	MGNX	Restricted Stock Unit	Common Stock (19,000)	—	—	19,000	Acquired
Feb. 7, 2025	MGNX	Employee Stock Option (right to buy)	Common Stock (113,000)	$2.60	Feb. 7, 2035	113,000	Acquired
Feb. 15, 2024	MGNX	Restricted Stock Unit	Common Stock (15,003)	—	—	15,003	Disposed
Feb. 8, 2024	MGNX	Restricted Stock Unit	Common Stock (30,000)	—	—	30,000	Acquired
Feb. 8, 2024	MGNX	Employee Stock Option (right to buy)	Common Stock (80,000)	$18.30	Feb. 8, 2034	80,000	Acquired
Feb. 15, 2023	MGNX	Restricted Stock Unit	Common Stock (45,000)	—	—	45,000	Acquired
Feb. 15, 2023	MGNX	Employee stock option (right to buy)	Common Stock (180,000)	$4.82	Feb. 15, 2033	180,000	Acquired
March 28, 2022	MGNX	Employee stock option (right to buy)	Common Stock (8,316)	$1.51	Jan. 5, 2023	8,316	Disposed
Feb. 22, 2022	MGNX	Employee stock option (right to buy)	Common Stock (140,000)	$10.15	Feb. 22, 2032	140,000	Acquired
Feb. 22, 2021	MGNX	Employee stock option (right to buy)	Common Stock (95,000)	$19.18	Feb. 22, 2031	95,000	Acquired
Jan. 28, 2021	MGNX	Employee stock option (right to buy)	Common Stock (5,000)	$1.51	Jan. 5, 2023	5,000	Disposed
Jan. 28, 2021	MGNX	Employee stock option (right to buy)	Common Stock (1,000)	$0.94	March 13, 2022	1,000	Disposed
March 6, 2020	MGNX	Employee stock option (right to buy)	Common Stock (4,473)	$0.94	March 13, 2022	4,473	Disposed
Feb. 20, 2020	MGNX	Employee stock option (right to buy)	Common Stock (90,000)	$11.50	Feb. 20, 2030	90,000	Acquired
Jan. 30, 2020	MGNX	Employee stock option (right to buy)	Common Stock (5,180)	$0.94	March 13, 2022	5,180	Disposed
Jan. 30, 2020	MGNX	Employee stock option (right to buy)	Common Stock (7,320)	$0.94	Jan. 8, 2021	7,320	Disposed
Feb. 21, 2019	MGNX	Employee stock option (right to buy)	Common Stock (85,000)	$21.88	Feb. 21, 2029	85,000	Acquired
Jan. 24, 2019	MGNX	Employee stock option (right to buy)	Common Stock (2,000)	$0.94	Jan. 8, 2021	2,000	Disposed
Jan. 24, 2019	MGNX	Employee stock option (right to buy)	Common Stock (5,326)	$0.94	Jan. 9, 2020	5,326	Disposed
Jan. 8, 2019	MGNX	Employee stock option (right to buy)	Common Stock (5,314)	$0.94	Jan. 10, 2019	5,314	Disposed
Dec. 18, 2018	MGNX	Employee stock option (right to buy)	Common Stock (5,000)	$0.94	Jan. 10, 2019	5,000	Disposed
Nov. 27, 2018	MGNX	Employee stock option (right to buy)	Common Stock (3,000)	$0.94	Jan. 10, 2019	3,000	Disposed
March 2, 2018	MGNX	Employee stock option (right to buy)	Common Stock (70,000)	$28.94	March 2, 2028	70,000	Acquired
Jan. 16, 2018	MGNX	Employee stock option (right to buy)	Common Stock (6,516)	$0.94	April 9, 2018	6,516	Disposed
Dec. 29, 2017	MGNX	Employee stock option (right to buy)	Common Stock (3,000)	$0.94	April 9, 2018	3,000	Disposed
Sept. 5, 2017	MGNX	Employee stock option (right to buy)	Common Stock (5,000)	$0.94	April 9, 2018	5,000	Disposed
Feb. 15, 2017	MGNX	Common Stock	Common Stock (55,000)	$20.53	Feb. 15, 2027	55,000	Acquired
Jan. 25, 2017	MGNX	Employee stock option (right to buy)	Common Stock (5,000)	$0.94	April 9, 2018	5,000	Disposed
Jan. 29, 2016	MGNX	Employee Stock Option (right to buy)	Common Stock (10,000)	$0.94	April 9, 2018	10,000	Acquired
Dec. 18, 2015	MGNX	Employee Stock Option (right to buy)	Common Stock (45,000)	$31.43	Dec. 18, 2025	45,000	Acquired
Oct. 7, 2015	MGNX	Employee Stock Option (right to buy)	Common Stock (6,000)	$0.94	April 9, 2018	6,000	Disposed
Dec. 24, 2014	MGNX	Employee Stock Option (right to buy)	Common Stock (4,100)	$0.94	April 9, 2018	4,100	Disposed
Dec. 12, 2014	MGNX	Employee Stock Option (right to buy)	Common Stock (40,000)	$29.68	Dec. 12, 2024	40,000	Acquired
Oct. 9, 2013	MGNX	Stock Option (right to buy)	Common Stock (48,791)	$16.00	Oct. 9, 2023	48,791	Disposed

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

Initial ownership (Form 3) 13 holdings

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

Date	Ticker	Security	Shares	Ownership
Oct. 9, 2013	MGNX	Common Stock	80,231	Indirect
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct
Oct. 9, 2013	MGNX	Stock Option (right to buy)→ Common Stock	—	Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

MGNX

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2025	$506,548	$150,000	$49,400	$254,284	$175,000	—	$14,000	$1,149,232
2024	$491,077	—	$549,000	$1,153,112	$158,554	—	$13,800	$2,365,543
2023	$471,106	—	$216,900	$668,538	$209,000	—	$13,200	$1,578,744

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.