Thomas Hofstaetter

Insider

First SEC filing: March 29, 2010 · Latest: March 19, 2015

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

GERN selling March 18, 2015

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 24 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

24 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
March 18, 2015	GERN	M	35,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 18, 2015	GERN	M	35,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 18, 2015	GERN	S	70,000	$4.10	$287,000	26,564 Direct	-72.49%	Disposed	-62.1% (price as of 2026-08-21)
March 18, 2015	GERN	M	35,000	$1.10	$38,500	96,564 Direct	+56.85%	Acquired	41.4% (price as of 2026-08-21)
March 18, 2015	GERN	M	35,000	$1.41	$49,350	61,564 Direct	+131.76%	Acquired	10.3% (price as of 2026-08-21)
June 30, 2014	GERN	D	2,500	—	—	26,564 Direct	-8.60%	Disposed	(price as of 2026-08-21)
May 20, 2014	GERN	A	35,000	—	—	35,000 Direct	—	Acquired	(price as of 2026-08-21)
July 9, 2013	GERN	D	45,000	—	—	29,064 Direct	-60.76%	Disposed	(price as of 2026-08-21)
May 22, 2013	GERN	A	35,000	—	—	35,000 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 31, 2012	GERN	D	2,500	—	—	74,064 Direct	-3.27%	Disposed	(price as of 2026-08-21)
May 17, 2012	GERN	A	35,000	—	—	35,000 Direct	—	Acquired	(price as of 2026-08-21)
May 17, 2012	GERN	A	14,923	—	—	76,564 Direct	+24.21%	Acquired	(price as of 2026-08-21)
May 20, 2011	GERN	A	2,500	—	—	61,641 Direct	+4.23%	Acquired	(price as of 2026-08-21)
May 20, 2011	GERN	A	2,500	—	—	59,141 Direct	+4.41%	Acquired	(price as of 2026-08-21)
May 11, 2011	GERN	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-21)
May 11, 2011	GERN	A	12,000	—	—	12,000 Direct	—	Acquired	(price as of 2026-08-21)
May 11, 2011	GERN	A	6,000	—	—	56,641 Direct	+11.85%	Acquired	(price as of 2026-08-21)
May 11, 2011	GERN	A	4,073	—	—	50,641 Direct	+8.75%	Acquired	(price as of 2026-08-21)
July 9, 2010	GERN	A	18,000	—	—	46,568 Direct	+63.01%	Acquired	(price as of 2026-08-21)
July 9, 2010	GERN	A	9,000	—	—	28,568 Direct	+45.99%	Acquired	(price as of 2026-08-21)
July 9, 2010	GERN	A	9,000	—	—	19,568 Direct	+85.16%	Acquired	(price as of 2026-08-21)
July 9, 2010	GERN	A	9,000	—	—	10,568 Direct	+573.98%	Acquired	(price as of 2026-08-21)
May 19, 2010	GERN	A	1,875	—	—	1,875 Direct	—	Acquired	(price as of 2026-08-21)
May 19, 2010	GERN	A	938	—	—	1,568 Direct	+148.89%	Acquired	(price as of 2026-08-21)
May 19, 2010	GERN	A	630	$5.29	$3,333	630 Direct	—	Acquired	-68.9% (price as of 2026-08-21)

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
March 18, 2015	GERN	Stock Option (right to buy)	Common Stock (35,000)	$1.10	May 22, 2023	35,000	Disposed
March 18, 2015	GERN	Stock Option (right to buy)	Common Stock (35,000)	$1.41	May 17, 2022	35,000	Disposed
May 20, 2014	GERN	Stock Option (right to buy)	Common Stock (35,000)	$1.94	May 20, 2024	35,000	Acquired
May 22, 2013	GERN	Stock Option (right to buy)	Common Stock (35,000)	$1.10	May 22, 2023	35,000	Acquired
May 17, 2012	GERN	Stock Option (right to buy)	Common Stock (35,000)	$1.41	May 17, 2022	35,000	Acquired
May 11, 2011	GERN	Stock Option (right to buy)	Common Stock (15,000)	$4.91	May 11, 2021	15,000	Acquired
May 11, 2011	GERN	Stock Option (right to buy)	Common Stock (12,000)	$4.91	May 11, 2021	12,000	Acquired
May 19, 2010	GERN	Stock Option (right to buy)	Common Stock (1,875)	$5.29	May 19, 2020	1,875	Acquired

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

Initial ownership (Form 3) 4 holdings

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

Date	Ticker	Security	Shares	Ownership
March 29, 2010	GERN	Stock Option (right to buy)→ Common Stock (45,000)	45,000	Direct
March 29, 2010	GERN	Stock Option (right to buy)→ Common Stock (2,500)	2,500	Direct
March 26, 2010	GERN	Common Stock→ Common Stock (45,000)	45,000	Direct
March 26, 2010	GERN	Common Stock→ Common Stock (2,500)	2,500	Direct