David A Neumann

Insider

First SEC filing: Feb. 10, 2006 · Latest: Feb. 10, 2006

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 14 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
Feb. 1, 2006	PLUG	A	40,000	$5.58	$223,200	116,979 Direct	+51.96%	Acquired	-96.1% (price as of 2026-08-19)
Feb. 1, 2006	PLUG	A	21,000	$5.58	$117,180	35,282 Direct	+147.04%	Acquired	-96.1% (price as of 2026-08-19)
Feb. 1, 2006	PLUG	A	1,815	$5.58	$10,128	14,282 Direct	+14.56%	Acquired	-96.1% (price as of 2026-08-19)
Sept. 21, 2005	PLUG	F	6,500	$6.58	$42,770	12,467 Direct	-34.27%	Disposed	-96.7% (price as of 2026-08-19)
Jan. 28, 2005	PLUG	A	25,000	$5.39	$134,750	76,979 Direct	+48.10%	Acquired	-96.0% (price as of 2026-08-19)
Feb. 10, 2004	PLUG	A	18,500	$9.20	$170,200	51,979 Direct	-26.25%	Disposed	-97.7% (price as of 2026-08-19)
Feb. 10, 2004	PLUG	A	4,967	—	—	18,967 Direct	+35.48%	Acquired	(price as of 2026-08-19)
June 20, 2003	PLUG	D	10,000	$17.94	$179,400	9,563 Direct	-51.12%	Disposed	-98.8% (price as of 2026-08-19)
June 20, 2003	PLUG	D	18,000	$83.50	$1,503,000	9,563 Direct	-65.30%	Disposed	-99.7% (price as of 2026-08-19)
June 20, 2003	PLUG	D	14,000	$11.00	$154,000	9,563 Direct	-59.42%	Disposed	-98.0% (price as of 2026-08-19)
Nov. 14, 2001	PLUG	A	23,916	$8.53	$204,003	33,479 Direct	-41.67%	Disposed	-97.5% (price as of 2026-08-19)
Jan. 18, 1999	PLUG	A	4,563	$5.00	$22,815	9,563 Direct	-32.30%	Disposed	-95.7% (price as of 2026-08-19)
Oct. 18, 1998	PLUG	A	3,000	$5.00	$15,000	5,000 Direct	-37.50%	Disposed	-95.7% (price as of 2026-08-19)
Dec. 31, 1997	PLUG	A	2,000	$1.00	$2,000	2,000 Direct	-50.00%	Disposed	-78.5% (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
Feb. 1, 2006	PLUG	Stock Options	Common Stock (40,000)	$5.58	Feb. 8, 2016	40,000	Acquired
Jan. 28, 2005	PLUG	Employee Stock Option	Common Stock (25,000)	$5.39	Jan. 28, 2015	25,000	Acquired
Feb. 10, 2004	PLUG	Employee Stock Option	Common Stock (18,500)	$9.20	Feb. 10, 2014	18,500	Disposed
June 20, 2003	PLUG	Employee Stock Option [F5]	Common Stock (10,000)	$17.94	Jan. 11, 2011	10,000	Disposed
June 20, 2003	PLUG	Employee Stock Option [F5]	Common Stock (18,000)	$83.50	Jan. 28, 2010	18,000	Disposed
June 20, 2003	PLUG	Employee Stock Option [F5]	Common Stock (14,000)	$11.00	July 26, 2009	14,000	Disposed
Nov. 14, 2001	PLUG	Employee Stock Option	Common Stock (23,916)	$8.53	Nov. 14, 2011	23,916	Disposed
Jan. 18, 1999	PLUG	Employee Stock Option	Common Stock (4,563)	$5.00	Jan. 18, 2009	4,563	Disposed
Oct. 18, 1998	PLUG	Employee Stock Option	Common Stock (3,000)	$5.00	Oct. 18, 2008	3,000	Disposed
Dec. 31, 1997	PLUG	Employee Stock Option	Common Stock (2,000)	$1.00	Dec. 31, 2007	2,000	Disposed

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

Matched by name from proxy statements (DEF 14A) — verify against the filing.

CFO

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2006	$96,507	$25,000	—	—	—	—	$275,175	$668,395
2005	$169,105,154,500,147,104	$310,003,100,039,575	—	—	—	—	$859,978,747,356	—
2004	$154,500,147,116,100,000	$310,003,957,530,000	—	—	—	—	$787,473,564,558	—

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.