Jon Marc Wigginton

Insider

First SEC filing: June 9, 2026 · Latest: June 9, 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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 46 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

46 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 5, 2026	STRO	A	10,000	$26.09	$260,900	—	—	—	-12.1% (price as of 2026-08-19)
June 8, 2023	STRO	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-19)
June 6, 2022	STRO	A	18,500	—	—	18,500 Direct	—	Acquired	(price as of 2026-08-19)
June 3, 2021	STRO	A	18,500	—	—	18,500 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 7, 2021	CGEM	A	116,666	—	—	116,666 Direct	—	Acquired	(price as of 2026-08-19)
Nov. 30, 2020	STRO	A	24,000	—	—	24,000 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 20, 2020	MGNX	A	100,000	$11.50	$1,150,000	100,000 Direct	—	Acquired	-63.7% (price as of 2026-08-19)
Feb. 21, 2019	MGNX	A	90,000	—	—	90,000 Direct	—	Acquired	(price as of 2026-08-19)
March 2, 2018	MGNX	A	70,000	—	—	70,000 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 26, 2018	MGNX	F	11,070	$23.46	$259,702	18,930 Direct	-36.90%	Disposed	-82.2% (price as of 2026-08-19)
Jan. 17, 2018	MGNX	M	2,524	—	—	45,448 Direct	-5.26%	Disposed	(price as of 2026-08-19)
Jan. 17, 2018	MGNX	S 10b5-1	2,524	$20.00	$50,480	30,000 Direct	-7.76%	Disposed	-79.1% (price as of 2026-08-19)
Jan. 17, 2018	MGNX	M	2,524	$4.70	$11,863	32,524 Direct	+8.41%	Acquired	-11.2% (price as of 2026-08-19)
Jan. 16, 2018	MGNX	M	2,476	—	—	47,972 Direct	-4.91%	Disposed	(price as of 2026-08-19)
Jan. 16, 2018	MGNX	S 10b5-1	2,476	$20.00	$49,520	30,000 Direct	-7.62%	Disposed	-79.1% (price as of 2026-08-19)
Jan. 16, 2018	MGNX	M	2,476	$4.70	$11,637	32,476 Direct	+8.25%	Acquired	-11.2% (price as of 2026-08-19)
Nov. 21, 2017	MGNX	M	5,000	—	—	50,448 Direct	-9.02%	Disposed	(price as of 2026-08-19)
Nov. 21, 2017	MGNX	S 10b5-1	5,000	$20.00	$100,000	30,000 Direct	-14.29%	Disposed	-79.1% (price as of 2026-08-19)
Nov. 21, 2017	MGNX	M	5,000	$4.70	$23,500	35,000 Direct	+16.67%	Acquired	-11.2% (price as of 2026-08-19)
Oct. 25, 2017	MGNX	M	10,000	$4.70	$47,000	55,448 Direct	-15.28%	Disposed	-11.2% (price as of 2026-08-19)
Oct. 25, 2017	MGNX	S 10b5-1	10,000	$20.00	$200,000	30,000 Direct	-25.00%	Disposed	-79.1% (price as of 2026-08-19)
Oct. 25, 2017	MGNX	M	10,000	$4.70	$47,000	40,000 Direct	+33.33%	Acquired	-11.2% (price as of 2026-08-19)
June 5, 2017	MGNX	M	5,000	$4.70	$23,500	65,448 Direct	-7.10%	Disposed	-11.2% (price as of 2026-08-19)
June 5, 2017	MGNX	S 10b5-1	5,000	$20.00	$100,000	30,000 Direct	-14.29%	Disposed	-79.1% (price as of 2026-08-19)
June 5, 2017	MGNX	M	5,000	$4.70	$23,500	35,000 Direct	+16.67%	Acquired	-11.2% (price as of 2026-08-19)
April 19, 2017	MGNX	M	15,000	—	—	70,448 Direct	-17.55%	Disposed	(price as of 2026-08-19)
April 19, 2017	MGNX	S	15,000	$20.00	$300,000	30,000 Direct	-33.33%	Disposed	-79.1% (price as of 2026-08-19)
April 19, 2017	MGNX	M	15,000	$4.70	$70,500	45,000 Direct	+50.00%	Acquired	-11.2% (price as of 2026-08-19)
Feb. 15, 2017	MGNX	A	67,500	$20.53	$1,385,775	67,500 Direct	—	Acquired	-79.7% (price as of 2026-08-19)
Feb. 25, 2016	MGNX	A	30,000	—	—	30,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 4, 2016	MGNX	M	10,000	—	—	60,254 Direct	-14.23%	Disposed	(price as of 2026-08-19)
Jan. 4, 2016	MGNX	S 10b5-1	10,000	$29.64	$296,400	0 Direct	-100.00%	Disposed	-85.9% (price as of 2026-08-19)
Jan. 4, 2016	MGNX	M	10,000	$4.70	$47,000	10,000 Direct	—	Acquired	-11.2% (price as of 2026-08-19)
Dec. 18, 2015	MGNX	A	55,000	—	—	55,000 Direct	—	Acquired	(price as of 2026-08-19)
Oct. 1, 2015	MGNX	M	5,000	—	—	45,194 Direct	-9.96%	Disposed	(price as of 2026-08-19)
Oct. 1, 2015	MGNX	S 10b5-1	5,000	$21.11	$105,550	0 Direct	-100.00%	Disposed	-80.2% (price as of 2026-08-19)
Oct. 1, 2015	MGNX	M	5,000	$4.70	$23,500	5,000 Direct	—	Acquired	-11.2% (price as of 2026-08-19)
Oct. 1, 2015	MGNX	M	5,000	—	—	45,194 Direct	-9.96%	Disposed	(price as of 2026-08-19)
Oct. 1, 2015	MGNX	S 10b5-1	5,000	$21.11	$105,550	0 Direct	-100.00%	Disposed	-80.2% (price as of 2026-08-19)
Oct. 1, 2015	MGNX	M	5,000	$4.70	$23,500	5,000 Direct	—	Acquired	-11.2% (price as of 2026-08-19)
Aug. 3, 2015	MGNX	M	10,000	—	—	50,194 Direct	-16.61%	Disposed	(price as of 2026-08-19)
Aug. 3, 2015	MGNX	S 10b5-1	10,000	$37.15	$371,500	0 Direct	-100.00%	Disposed	-88.8% (price as of 2026-08-19)
Aug. 3, 2015	MGNX	M	10,000	$4.70	$47,000	10,000 Direct	—	Acquired	-11.2% (price as of 2026-08-19)
Aug. 3, 2015	MGNX	M	10,000	—	—	50,194 Direct	-16.61%	Disposed	(price as of 2026-08-19)
Aug. 3, 2015	MGNX	S 10b5-1	10,000	$37.15	$371,500	0 Direct	-100.00%	Disposed	-88.8% (price as of 2026-08-19)
Aug. 3, 2015	MGNX	M	10,000	$4.70	$47,000	10,000 Direct	—	Acquired	-11.2% (price as of 2026-08-19)
July 1, 2015	MGNX	M	5,000	—	—	60,194 Direct	-7.67%	Disposed	(price as of 2026-08-19)
July 1, 2015	MGNX	S 10b5-1	5,000	$37.15	$185,750	0 Direct	-100.00%	Disposed	-88.8% (price as of 2026-08-19)
July 1, 2015	MGNX	M	5,000	$4.70	$23,500	5,000 Direct	—	Acquired	-11.2% (price as of 2026-08-19)
April 1, 2015	MGNX	M	5,000	—	—	65,194 Direct	-7.12%	Disposed	(price as of 2026-08-19)
April 1, 2015	MGNX	S 10b5-1	5,000	$30.86	$154,300	0 Direct	-100.00%	Disposed	-86.5% (price as of 2026-08-19)
Feb. 2, 2015	MGNX	M	5,000	—	—	70,194 Direct	-6.65%	Disposed	(price as of 2026-08-19)
Feb. 2, 2015	MGNX	S 10b5-1	5,000	$31.04	$155,200	0 Direct	-100.00%	Disposed	-86.5% (price as of 2026-08-19)
Feb. 2, 2015	MGNX	M	5,000	$4.70	$23,500	5,000 Direct	—	Acquired	-11.2% (price as of 2026-08-19)
Dec. 12, 2014	MGNX	A	40,000	—	—	40,000 Direct	—	Acquired	(price as of 2026-08-19)
Oct. 1, 2014	MGNX	M	5,000	—	—	75,194 Direct	-6.23%	Disposed	(price as of 2026-08-19)
Oct. 1, 2014	MGNX	S 10b5-1	5,000	$20.48	$102,400	0 Direct	-100.00%	Disposed	-79.6% (price as of 2026-08-19)
Oct. 1, 2014	MGNX	M	5,000	$4.70	$23,500	5,000 Direct	—	Acquired	-11.2% (price as of 2026-08-19)
Aug. 18, 2014	MGNX	M	5,000	—	—	80,194 Direct	-5.87%	Disposed	(price as of 2026-08-19)
Aug. 18, 2014	MGNX	S 10b5-1	5,000	$20.52	$102,600	0 Direct	-100.00%	Disposed	-79.7% (price as of 2026-08-19)
Aug. 18, 2014	MGNX	M	5,000	$4.70	$23,500	5,000 Direct	—	Acquired	-11.2% (price as of 2026-08-19)
April 1, 2014	MGNX	M	5,000	$4.70	$23,500	5,000 Direct	—	Acquired	-11.2% (price as of 2026-08-19)

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 8, 2023	STRO	Stock Option (right to buy)	Common Stock (25,000)	$5.12	June 8, 2033	25,000	Acquired
June 6, 2022	STRO	Stock Option (right to buy)	Common Stock (18,500)	$4.44	June 5, 2032	18,500	Acquired
June 3, 2021	STRO	Stock Option (right to buy)	Common Stock (18,500)	$18.21	June 2, 2031	18,500	Acquired
Jan. 7, 2021	CGEM	Stock Option (Right to Buy)	Common Stock (116,666)	$21.00	Jan. 6, 2031	116,666	Acquired
Nov. 30, 2020	STRO	Stock Option (right to buy)	Common Stock (24,000)	$17.10	Nov. 29, 2030	24,000	Acquired
Feb. 20, 2020	MGNX	Employee stock option (right to buy)	Common Stock (100,000)	$11.50	Feb. 20, 2030	100,000	Acquired
Feb. 21, 2019	MGNX	Employee stock option (right to buy)	Common Stock (90,000)	$21.88	Feb. 21, 2029	90,000	Acquired
March 2, 2018	MGNX	Employee stock option (right to buy)	Common Stock (70,000)	$28.94	March 2, 2028	70,000	Acquired
Jan. 17, 2018	MGNX	Employee stock option (right to buy)	Common Stock (2,524)	$4.70	July 18, 2023	2,524	Disposed
Jan. 16, 2018	MGNX	Employee stock option (right to buy)	Common Stock (2,476)	$4.70	July 18, 2023	2,476	Disposed
Nov. 21, 2017	MGNX	Employee stock option (right to buy)	Common Stock (5,000)	$4.70	July 18, 2023	5,000	Disposed
Oct. 25, 2017	MGNX	Employee stock option (right to buy)	Common Stock (10,000)	$4.70	July 18, 2023	10,000	Disposed
June 5, 2017	MGNX	Employee stock option (right to buy)	Common Stock (5,000)	$4.70	July 18, 2023	5,000	Disposed
April 19, 2017	MGNX	Employee stock option (right to buy)	Common Stock (15,000)	$4.70	July 18, 2023	15,000	Disposed
Feb. 15, 2017	MGNX	Common Stock	Common Stock (67,500)	$20.53	Feb. 15, 2027	67,500	Acquired
Jan. 4, 2016	MGNX	Employee Stock Option (right to buy)	Common Stock (10,000)	$4.70	July 18, 2023	10,000	Disposed
Dec. 18, 2015	MGNX	Employee Stock Option (right to buy)	Common Stock (55,000)	$31.43	Dec. 18, 2025	55,000	Acquired
Oct. 1, 2015	MGNX	Employee Stock Option (right to buy)	Common Stock (5,000)	$4.70	July 18, 2023	5,000	Disposed
Oct. 1, 2015	MGNX	Employee Stock Option (right to buy)	Common Stock (5,000)	$4.70	July 18, 2023	5,000	Disposed
Aug. 3, 2015	MGNX	Employee Stock Option (right to buy)	Common Stock (10,000)	$4.70	July 18, 2023	10,000	Disposed
Aug. 3, 2015	MGNX	Employee Stock Option (right to buy)	Common Stock (10,000)	$4.70	July 18, 2023	10,000	Disposed
July 1, 2015	MGNX	Employee Stock Option (right to buy)	Common Stock (5,000)	$4.70	July 18, 2023	5,000	Disposed
April 1, 2015	MGNX	Employee Stock Option (right to buy)	Common Stock (5,000)	$4.70	July 18, 2023	5,000	Disposed
Feb. 2, 2015	MGNX	Employee Stock Option (right to buy)	Common Stock (5,000)	$4.70	July 18, 2023	5,000	Disposed
Dec. 12, 2014	MGNX	Employee Stock Option (right to buy)	Common Stock (40,000)	$29.68	Dec. 12, 2024	40,000	Acquired
Oct. 1, 2014	MGNX	Stock option (right to buy)	Common Stock (5,000)	$4.70	July 18, 2023	5,000	Disposed
Aug. 18, 2014	MGNX	Stock Option (right to buy)	Common Stock (5,000)	$4.70	July 18, 2023	5,000	Disposed

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
Jan. 7, 2021	CGEM	Stock Option (Right to Buy)→ Common Stock (379,337)	379,337	Direct
Jan. 7, 2021	CGEM	Stock Option (Right to Buy)→ Common Stock (252,891)	252,891	Direct
Dec. 1, 2020	STRO	No securities beneficially held	0	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
2019	$453,454	—	—	$1,321,668	$163,366	—	$3,763	$1,942,251
2018	$460,000	—	—	—	$173,328	—	$8,250	$1,976,107
2017	$445,050	—	—	—	$197,600	—	$8,100	$1,516,458

CGEM

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2020	$321,122	$258,000	—	—	—	—	$5,375	$4,544,022

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