Duane M Grubert

Insider

First SEC filing: Oct. 20, 2016 · Latest: Oct. 20, 2016

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 10 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

No open-market trades on record; showing all filings.

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Oct. 19, 2016	SD	A	72,674	—	—	72,674 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 30, 2015	SD	F	10,307	$0.17	$1,752	164,231 Direct	-5.91%	Disposed	8423.5% (price as of 2026-08-20)
Oct. 2, 2015	SD	A	28,755	$0.33	$9,489	174,538 Direct	+19.72%	Acquired	4290.9% (price as of 2026-08-20)
July 1, 2015	SD	A	21,048	$0.83	$17,470	145,783 Direct	+16.87%	Acquired	1645.8% (price as of 2026-08-20)
April 1, 2015	SD	A	6,349	$1.77	$11,238	124,735 Direct	+5.36%	Acquired	718.6% (price as of 2026-08-20)
March 20, 2015	SD	A	137,195	—	—	269,180 Direct	+103.95%	Acquired	(price as of 2026-08-20)
Feb. 19, 2015	SD	A	131,985	$2.37	$312,804	131,985 Direct	—	Acquired	511.4% (price as of 2026-08-20)
Jan. 2, 2015	SD	A	2,218	$1.77	$3,926	118,386 Direct	+1.91%	Acquired	718.6% (price as of 2026-08-20)
Dec. 30, 2014	SD	F	10,308	$1.90	$19,585	116,168 Direct	-8.15%	Disposed	662.6% (price as of 2026-08-20)
Dec. 30, 2013	SD	A	126,476	—	—	126,476 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.

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
March 20, 2015	SD	Common Stock	Common Stock (137,195)	—	—	137,195	Acquired
Feb. 19, 2015	SD	Common Stock	Common Stock (131,985)	—	—	131,985	Acquired

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