WALKER THOMAS K

Insider

First SEC filing: May 22, 2007 · Latest: May 22, 2007

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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.

Insider at

DCH buying June 5, 2012

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 8 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

8 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 1, 2014	DCH	A	5,459	—	—	36,922 Direct	+17.35%	Acquired	(price as of 2026-08-19)
May 2, 2013	DCH	A	7,279	—	—	31,463 Direct	+30.10%	Acquired	(price as of 2026-08-19)
June 5, 2012	DCH	P	600	$8.35	$5,010	3,400 Indirect	+21.43%	Acquired	-20.6% (price as of 2026-08-19)
June 5, 2012	DCH	P	700	$8.34	$5,838	2,800 Indirect	+33.33%	Acquired	-20.5% (price as of 2026-08-19)
June 5, 2012	DCH	P	600	$8.32	$4,992	2,100 Indirect	+40.00%	Acquired	-20.3% (price as of 2026-08-19)
June 5, 2012	DCH	P	3	$8.37	$25	1,500 Indirect	+0.20%	Acquired	-20.8% (price as of 2026-08-19)
June 5, 2012	DCH	P	297	$8.36	$2,483	1,497 Indirect	+24.75%	Acquired	-20.7% (price as of 2026-08-19)
June 5, 2012	DCH	P	500	$8.40	$4,200	1,200 Indirect	+71.43%	Acquired	-21.1% (price as of 2026-08-19)
June 5, 2012	DCH	P	300	$8.43	$2,529	700 Indirect	+75.00%	Acquired	-21.4% (price as of 2026-08-19)
May 15, 2012	DCH	A	8,734	—	—	24,184 Direct	+56.53%	Acquired	(price as of 2026-08-19)
May 24, 2011	DCH	P	1,000	$10.88	$10,880	15,450 Direct	+6.92%	Acquired	-39.1% (price as of 2026-08-19)
May 24, 2011	DCH	P	600	$10.86	$6,516	14,450 Direct	+4.33%	Acquired	-39.0% (price as of 2026-08-19)
May 23, 2011	DCH	P	400	$10.91	$4,364	400 Indirect	—	Acquired	-39.2% (price as of 2026-08-19)
Feb. 20, 2009	DCH	P	5,000	$0.78	$3,900	18,850 Direct	+36.10%	Acquired	750.0% (price as of 2026-08-19)
April 24, 2008	DCH	A	3,250	—	—	8,850 Direct	+58.04%	Acquired	(price as of 2026-08-19)
May 21, 2007	DCH	M	6,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
May 21, 2007	DCH	S	1,700	$29.24	$49,708	1,000 Direct	-62.96%	Disposed	-77.3% (price as of 2026-08-19)
May 21, 2007	DCH	S	500	$29.23	$14,615	2,700 Direct	-15.62%	Disposed	-77.3% (price as of 2026-08-19)
May 21, 2007	DCH	S	1,100	$29.22	$32,142	3,200 Direct	-25.58%	Disposed	-77.3% (price as of 2026-08-19)
May 21, 2007	DCH	S	600	$29.21	$17,526	4,300 Direct	-12.24%	Disposed	-77.3% (price as of 2026-08-19)
May 21, 2007	DCH	S	900	$29.20	$26,280	4,900 Direct	-15.52%	Disposed	-77.3% (price as of 2026-08-19)
May 21, 2007	DCH	S	1,200	$29.19	$35,028	5,800 Direct	-17.14%	Disposed	-77.3% (price as of 2026-08-19)
May 21, 2007	DCH	M	6,000	$15.25	$91,500	7,000 Direct	+600.00%	Acquired	-56.5% (price as of 2026-08-19)
April 26, 2007	DCH	A	2,200	—	—	5,600 Direct	+64.71%	Acquired	(price as of 2026-08-19)
April 27, 2006	DCH	A	2,400	—	—	3,400 Direct	+240.00%	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.

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
May 21, 2007	DCH	Employee Stock Option (right to buy)	Common Stock (6,000)	$15.25	May 4, 2010	6,000	Disposed

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