Thomas H. Mcmahon

Insider

First SEC filing: June 20, 2019 · Latest: June 20, 2019

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

GO selling Dec. 4, 2020

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 34 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

34 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Dec. 4, 2020	GO	M	5,552	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 4, 2020	GO	M	39,121	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 4, 2020	GO	S	24,727	$36.87	$911,684	119,819 Direct	-17.11%	Disposed	-70.0% (price as of 2026-08-20)
Dec. 4, 2020	GO	M	5,552	$7.13	$39,586	144,546 Direct	+3.99%	Acquired	55.3% (price as of 2026-08-20)
Dec. 4, 2020	GO	M	39,121	$3.81	$149,051	138,994 Direct	+39.17%	Acquired	190.6% (price as of 2026-08-20)
Sept. 10, 2020	GO	M	5,800	—	—	5,552 Direct	—	Acquired	(price as of 2026-08-20)
Sept. 10, 2020	GO	S 10b5-1	1,600	$39.19	$62,704	99,873 Direct	-1.58%	Disposed	-71.8% (price as of 2026-08-20)
Sept. 10, 2020	GO	S 10b5-1	4,200	$38.53	$161,826	101,473 Direct	-3.97%	Disposed	-71.3% (price as of 2026-08-20)
Sept. 10, 2020	GO	M	5,800	$7.13	$41,354	105,673 Direct	+5.81%	Acquired	55.3% (price as of 2026-08-20)
Aug. 18, 2020	GO	M	90,000	—	—	39,121 Direct	-69.70%	Disposed	(price as of 2026-08-20)
Aug. 18, 2020	GO	S 10b5-1	90,000	$42.05	$3,784,500	99,873 Direct	-47.40%	Disposed	-73.7% (price as of 2026-08-20)
Aug. 18, 2020	GO	M	90,000	$3.81	$342,900	189,873 Direct	+90.11%	Acquired	190.6% (price as of 2026-08-20)
Aug. 17, 2020	GO	M	232	—	—	129,121 Direct	-0.18%	Disposed	(price as of 2026-08-20)
Aug. 17, 2020	GO	S 10b5-1	232	$43.06	$9,990	99,873 Direct	-0.23%	Disposed	-74.3% (price as of 2026-08-20)
Aug. 17, 2020	GO	M	232	$3.81	$884	100,105 Direct	+0.23%	Acquired	190.6% (price as of 2026-08-20)
Aug. 13, 2020	GO	M	10,000	—	—	11,352 Direct	-46.83%	Disposed	(price as of 2026-08-20)
Aug. 13, 2020	GO	M	2,664	—	—	129,353 Direct	-2.02%	Disposed	(price as of 2026-08-20)
Aug. 13, 2020	GO	S 10b5-1	6,636	$42.96	$285,083	99,873 Direct	-6.23%	Disposed	-74.2% (price as of 2026-08-20)
Aug. 13, 2020	GO	S 10b5-1	6,028	$42.56	$256,552	106,509 Direct	-5.36%	Disposed	-74.0% (price as of 2026-08-20)
Aug. 13, 2020	GO	M	10,000	$7.13	$71,300	112,537 Direct	+9.75%	Acquired	55.3% (price as of 2026-08-20)
Aug. 13, 2020	GO	M	2,664	$3.81	$10,150	102,537 Direct	+2.67%	Acquired	190.6% (price as of 2026-08-20)
Aug. 12, 2020	GO	M	87,336	—	—	132,017 Direct	-39.82%	Disposed	(price as of 2026-08-20)
Aug. 12, 2020	GO	S 10b5-1	87,336	$43.13	$3,766,802	99,873 Direct	-46.65%	Disposed	-74.3% (price as of 2026-08-20)
Aug. 12, 2020	GO	M	87,336	$3.81	$332,750	187,209 Direct	+87.45%	Acquired	190.6% (price as of 2026-08-20)
July 9, 2020	GO	M	45,000	—	—	21,352 Direct	-67.82%	Disposed	(price as of 2026-08-20)
July 9, 2020	GO	S 10b5-1	45,000	$42.84	$1,927,800	99,873 Direct	-31.06%	Disposed	-74.2% (price as of 2026-08-20)
July 9, 2020	GO	M	45,000	$7.13	$320,850	144,873 Direct	+45.06%	Acquired	55.3% (price as of 2026-08-20)
May 14, 2020	GO	M	25,000	—	—	66,352 Direct	-27.37%	Disposed	(price as of 2026-08-20)
May 14, 2020	GO	S 10b5-1	25,000	$37.00	$925,000	99,873 Direct	-20.02%	Disposed	-70.1% (price as of 2026-08-20)
May 14, 2020	GO	M	25,000	$7.13	$178,250	124,873 Direct	+25.03%	Acquired	55.3% (price as of 2026-08-20)
May 13, 2020	GO	A	8,678	—	—	99,873 Direct	+9.52%	Acquired	(price as of 2026-08-20)
April 27, 2020	GO	A	70,645	—	—	219,353 Direct	+47.51%	Acquired	(price as of 2026-08-20)
April 27, 2020	GO	M	22,000	—	—	148,708 Direct	-12.89%	Disposed	(price as of 2026-08-20)
April 27, 2020	GO	M	50,000	—	—	91,352 Direct	-35.37%	Disposed	(price as of 2026-08-20)
April 27, 2020	GO	S	72,000	$32.72	$2,355,840	91,195 Direct	-44.12%	Disposed	-66.2% (price as of 2026-08-20)
April 27, 2020	GO	M	22,000	$3.81	$83,820	163,195 Direct	+15.58%	Acquired	190.6% (price as of 2026-08-20)
April 27, 2020	GO	M	50,000	$7.13	$356,500	141,195 Direct	+54.83%	Acquired	55.3% (price as of 2026-08-20)
Feb. 3, 2020	GO	A	170,708	—	—	170,708 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 3, 2020	GO	M	50,000	—	—	141,352 Direct	-26.13%	Disposed	(price as of 2026-08-20)
Feb. 3, 2020	GO	S	50,000	$31.84	$1,592,000	91,195 Direct	-35.41%	Disposed	-65.2% (price as of 2026-08-20)
Feb. 3, 2020	GO	M	50,000	$7.13	$356,500	141,195 Direct	+54.83%	Acquired	55.3% (price as of 2026-08-20)
Oct. 8, 2019	GO	M	50,000	—	—	191,352 Direct	-20.72%	Disposed	(price as of 2026-08-20)
Oct. 8, 2019	GO	S	50,000	$32.57	$1,628,500	91,195 Direct	-35.41%	Disposed	-66.0% (price as of 2026-08-20)
Oct. 8, 2019	GO	M	50,000	$7.13	$356,500	141,195 Direct	+54.83%	Acquired	55.3% (price as of 2026-08-20)
June 24, 2019	GO	A	91,195	—	—	91,195 Direct	—	Acquired	(price as of 2026-08-20)
June 24, 2019	GO	D	91,195	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
June 19, 2019	GO	A	63,135	—	—	63,135 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
Dec. 4, 2020	GO	Stock Options (Right to Buy)	Common Stock (5,552)	$7.13	Nov. 25, 2024	5,552	Disposed
Dec. 4, 2020	GO	Stock Options (Right to Buy)	Common Stock (39,121)	$3.81	Nov. 25, 2024	39,121	Disposed
Sept. 10, 2020	GO	Stock Options (Right to Buy)	Common Stock (5,800)	$7.13	Nov. 25, 2024	5,800	Acquired
Aug. 18, 2020	GO	Stock Options (Right to Buy)	Common Stock (90,000)	$3.81	Nov. 25, 2024	90,000	Disposed
Aug. 17, 2020	GO	Stock Options (Right to Buy)	Common Stock (232)	$3.81	Nov. 25, 2024	232	Disposed
Aug. 13, 2020	GO	Stock Options (Right to Buy)	Common Stock (10,000)	$7.13	Nov. 25, 2024	10,000	Disposed
Aug. 13, 2020	GO	Stock Options (Right to Buy)	Common Stock (2,664)	$3.81	Nov. 25, 2024	2,664	Disposed
Aug. 12, 2020	GO	Stock Options (Right to Buy)	Common Stock (87,336)	$3.81	Nov. 25, 2024	87,336	Disposed
July 9, 2020	GO	Stock Options (Right to Buy)	Common Stock (45,000)	$7.13	Nov. 25, 2024	45,000	Disposed
May 14, 2020	GO	Stock Options (Right to Buy)	Common Stock (25,000)	$7.13	Nov. 25, 2024	25,000	Disposed
April 27, 2020	GO	Stock Options (Right to Buy)	Common Stock (70,645)	$3.81	Nov. 25, 2024	70,645	Acquired
April 27, 2020	GO	Stock Options (Right to Buy)	Common Stock (10,000)	$3.81	Nov. 25, 2024	22,000	Disposed
April 27, 2020	GO	Stock Options (Right to Buy)	Common Stock (50,000)	$7.13	Nov. 25, 2024	50,000	Disposed
Feb. 3, 2020	GO	Stock Options (Right to Buy)	Common Stock (170,708)	$3.81	Nov. 25, 2024	170,708	Acquired
Feb. 3, 2020	GO	Stock Options (Right to Buy)	Common Stock (50,000)	$7.13	Nov. 25, 2024	50,000	Disposed
Oct. 8, 2019	GO	Stock Options (Right to Buy)	Common Stock (50,000)	$7.13	Nov. 25, 2024	50,000	Disposed
June 19, 2019	GO	Stock Options (Right to Buy)	Common Stock (63,135)	$22.00	June 19, 2029	63,135	Acquired

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

Initial ownership (Form 3) 3 holdings

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

Date	Ticker	Security	Shares	Ownership
June 20, 2019	GO	Non-voting common stock [F1]	91,195	Direct
June 20, 2019	GO	Stock Options (Right to Buy)→ Common Stock (241,352)	241,352	Direct
June 20, 2019	GO	Stock Options (Right to Buy)→ Common Stock (63,135)	63,135	Direct