Insider · CIK 0001507574

Ken Williamson

Files at: IO. On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $591k · 2sales $0 · 0net $591k

Reported trades — common stock

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Mar 1, 2019 FForm 4 →	Mar 5, 4:24 pm EST	ION GEOPHYSICAL CORPIO	2,296	$13.16	$30,215	164,641	—	plan?
Dec 1, 2018 AForm 4 →	Dec 4, 7:32 pm EST	ION GEOPHYSICAL CORPIO	89,430	—	—	166,937	—	plan?
May 30, 2018 FForm 4 →	Jun 1, 4:45 pm EDT	ION GEOPHYSICAL CORPIO	3,477	$23.80	$82,753	77,507	—	plan?
Mar 1, 2018 AFForm 4 →	Mar 2, 7:07 pm EST	ION GEOPHYSICAL CORPIO	10,635	$28.10	$50,580	80,984	—	plan?
Dec 15, 2017 DMForm 4 →	Dec 19, 6:16 pm EST	ION GEOPHYSICAL CORPIO	200,000	$8.08	$1,615,000	73,949	—	plan?
Dec 15, 2017 PForm 4 →	Dec 19, 6:16 pm EST	ION GEOPHYSICAL CORPIO	26,000	$13.63	$354,294	73,949	+54.2%	plan?
Dec 14, 2017 PForm 4 →	Dec 18, 7:44 pm EST	ION GEOPHYSICAL CORPIO	18,176	$13.05	$237,197	47,949	+61.0%	plan?
Dec 1, 2016 FForm 4 →	Dec 2, 1:40 pm EST	ION GEOPHYSICAL CORPIO	122	$7.40	$903	29,773	—	plan?
Mar 1, 2016 AForm 4 →	Mar 3, 1:18 pm EST	ION GEOPHYSICAL CORPIO	17,500	—	—	29,895	—	plan?
Dec 1, 2015 MForm 4 →	Dec 3, 11:18 am EST	ION GEOPHYSICAL CORPIO	3,192	$0.56	$1,788	185,453	—	plan?
Mar 1, 2015 AFForm 4 →	Mar 3, 4:00 pm EST	ION GEOPHYSICAL CORPIO	71,836	$2.28	$4,159	188,145	—	plan?

Reported trades — derivatives (options, RSUs, warrants)

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Dec 1, 2018 AForm 4 →	Dec 4, 7:32 pm EST	ION GEOPHYSICAL CORPIO	95,435	—	—	95,435	—
Dec 15, 2017 MForm 4 →	Dec 19, 6:16 pm EST	ION GEOPHYSICAL CORPIO	100,000	—	—	50,000	—
Mar 1, 2015 AForm 4 →	Mar 3, 4:00 pm EST	ION GEOPHYSICAL CORPIO	540,227	—	—	435,209	—