David E Welch

Insider

First SEC filing: Oct. 4, 2004 · Latest: Oct. 4, 2004

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 13 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
May 9, 2016	RIOT	A	14,000	—	—	14,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 12, 2015	RIOT	A	53,000	—	—	53,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 6, 2014	RIOT	A	34,000	—	—	34,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 23, 2013	RIOT	A	26,000	—	—	26,000 Direct	—	Acquired	(price as of 2026-08-19)
Dec. 11, 2012	RIOT	A	33,340	—	—	33,340 Direct	—	Acquired	(price as of 2026-08-19)
April 2, 2012	RIOT	A	10,000	—	—	10,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 5, 2011	RIOT	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 19, 2010	RIOT	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 27, 2009	RIOT	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 17, 2008	RIOT	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 24, 2007	RIOT	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-19)
April 18, 2006	RIOT	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-19)
March 28, 2005	RIOT	A	50,000	—	—	50,000 Direct	—	Acquired	(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.

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

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
May 9, 2016	RIOT	Stock Option (Right to Buy)	Common Stock (14,000)	$2.89	May 9, 2026	14,000	Acquired
Jan. 12, 2015	RIOT	Stock Option (Right to Buy)	Common Stock (53,000)	$1.89	Jan. 12, 2025	53,000	Acquired
Jan. 6, 2014	RIOT	Stock Option (Right to Buy)	Common Stock (34,000)	$2.27	Jan. 6, 2024	34,000	Acquired
Jan. 23, 2013	RIOT	Stock Option (Right to Buy)	Common Stock (26,000)	$2.04	Jan. 23, 2023	26,000	Acquired
Dec. 11, 2012	RIOT	Stock Option (Right to Buy)	Common Stock (33,340)	$2.10	Dec. 11, 2012	33,340	Acquired
April 2, 2012	RIOT	Stock Option (Right to Buy)	Common Stock (10,000)	$0.71	April 2, 2022	10,000	Acquired
Jan. 5, 2011	RIOT	Stock Option (Right to Buy)	Common Stock (50,000)	$0.59	Jan. 5, 2021	50,000	Acquired
Jan. 19, 2010	RIOT	Option - Right to Buy	Common Stock (50,000)	$2.20	Jan. 19, 2020	50,000	Acquired
Jan. 27, 2009	RIOT	Stock Options [F5]	Common Stock (50,000)	$1.33	Jan. 27, 2019	50,000	Acquired
Jan. 17, 2008	RIOT	Stock Options [F4]	Common Stock (50,000)	$6.63	Jan. 17, 2018	50,000	Acquired
Jan. 24, 2007	RIOT	Stock Options [F3]	Common Stock (50,000)	$2.96	Jan. 24, 2017	50,000	Acquired
April 18, 2006	RIOT	Option (Right to Buy) [F2]	Common Stock (50,000)	$1.60	April 18, 2016	50,000	Acquired
March 28, 2005	RIOT	Option (Right to Buy)	Common Stock (50,000)	$0.80	March 28, 2015	50,000	Acquired

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

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

Date	Ticker	Security	Shares	Ownership
Oct. 4, 2004	RIOT	Option (Right to Buy) [F1]→ Common Stock (100,000)	100,000	Direct