Insider · CIK 0001640004

William N. Mathis

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

Open-market buys & salesbuys $402k · 3sales $0 · 0net $402k

Reported trades — common stock

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Jan 11, 2019 AForm 4 →	Jan 14, 7:15 pm EST	Black Stone Minerals, L.P.BSM	10,842	—	—	86,235	—	plan?
Jan 4, 2019 AForm 4 →	Jan 8, 5:33 pm EST	Black Stone Minerals, L.P.BSM	1,372	$15.48	$21,239	75,393	—	plan?
Nov 9, 2018 PForm 4 →	Nov 13, 5:34 pm EST	Black Stone Minerals, L.P.BSM	11,400	$16.79	$191,390	615,728	+1.89%	plan?
Oct 5, 2018 AForm 4 →	Oct 9, 6:02 pm EDT	Black Stone Minerals, L.P.BSM	1,166	$18.21	$21,233	74,021	—	plan?
Jul 6, 2018 AForm 4 →	Jul 10, 3:02 pm EDT	Black Stone Minerals, L.P.BSM	1,149	$18.49	$21,245	72,855	—	plan?
Apr 5, 2018 ACForm 4 →	Apr 9, 7:33 pm EDT	Black Stone Minerals, L.P.BSM	244,028	$16.55	$21,234	485,459	—	plan?
Jan 11, 2018 AForm 4 →	Jan 16, 4:44 pm EST	Black Stone Minerals, L.P.BSM	9,536	—	—	70,423	—	plan?
Jan 5, 2018 AForm 4 →	Jan 9, 5:41 pm EST	Black Stone Minerals, L.P.BSM	1,184	$17.94	$21,241	60,887	—	plan?
Oct 6, 2017 AForm 4 →	Oct 10, 6:25 pm EDT	Black Stone Minerals, L.P.BSM	1,225	$17.34	$21,242	59,703	—	plan?
Jul 7, 2017 AForm 4 →	Jul 11, 6:08 pm EDT	Black Stone Minerals, L.P.BSM	1,348	$15.76	$21,244	58,478	—	plan?
Apr 6, 2017 AForm 4 →	Apr 10, 5:38 pm EDT	Black Stone Minerals, L.P.BSM	1,287	$16.51	$21,248	57,130	—	plan?
Jan 11, 2017 AForm 4 →	Jan 12, 6:49 pm EST	Black Stone Minerals, L.P.BSM	9,095	—	—	55,843	—	plan?
Jan 6, 2017 AForm 4 →	Jan 10, 6:58 pm EST	Black Stone Minerals, L.P.BSM	1,131	$18.78	$21,240	46,748	—	plan?
Oct 7, 2016 AForm 4 →	Oct 11, 5:13 pm EDT	Black Stone Minerals, L.P.BSM	1,193	$17.81	$21,247	45,617	—	plan?
Jul 8, 2016 AForm 4 →	Jul 12, 4:50 pm EDT	Black Stone Minerals, L.P.BSM	1,370	$15.50	$21,235	44,424	—	plan?
Apr 8, 2016 AForm 4 →	Apr 12, 8:38 pm EDT	Black Stone Minerals, L.P.BSM	1,516	$14.01	$21,239	43,054	—	plan?
Mar 14, 2016 PForm 4 →	Mar 16, 6:31 pm EDT	Black Stone Minerals, L.P.BSM	11,410	$13.71	$156,438	604,328	+1.92%	plan?
Mar 10, 2016 PForm 4 →	Mar 11, 6:34 pm EST	Black Stone Minerals, L.P.BSM	3,979	$13.50	$53,697	592,918	+0.68%	plan?
Jan 12, 2016 AForm 4 →	Jan 14, 6:45 pm EST	Black Stone Minerals, L.P.BSM	12,368	—	—	41,538	—	plan?
May 6, 2015 AJForm 4 →	May 8, 9:30 pm EDT	Black Stone Minerals, L.P.BSM	1,229,154	—	—	1,229,154	—	plan?

Reported trades — derivatives (options, RSUs, warrants)

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Apr 5, 2018 CForm 4 →	Apr 9, 7:33 pm EDT	Black Stone Minerals, L.P.BSM	325,942	—	—	0	—
Mar 31, 2017 XForm 4 →	May 1, 9:21 pm EDT	Black Stone Minerals, L.P.BSM	8,000	$1,024.38	$8,195,040	8,000	—	late
Apr 8, 2016 XForm 4 →	Apr 12, 8:38 pm EDT	Black Stone Minerals, L.P.BSM	8,000	$1,026.78	$8,214,240	16,000	—
May 6, 2015 JForm 4 →	May 8, 9:30 pm EDT	Black Stone Minerals, L.P.BSM	1,627,028	—	—	1,627,028	—