PROKHOROV MIKHAIL D

10% owner at PLUG POWER INC · on record since Apr 21, 2006
10% owner at STILLWATER MINING CO /DE/ · on record since Apr 25, 2008

Insider trading activity of PROKHOROV MIKHAIL D

Transactions on record: 39; since Feb 8, 2008

Open-market buys: 36; $442.1K

Open-market sells: 2

Companies traded: 2; last filing Apr 25, 2008

Figures computed from official regulatory filings — .

Companies where PROKHOROV MIKHAIL D has traded

PLUG POWER INC38 tx · $442.1K · Apr 25, 2008
STILLWATER MINING CO /DE/1 tx · Apr 25, 2008

Track record of PROKHOROV MIKHAIL D

Statistical track record

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Open-market buys: 36

Last buy: Feb 7, 2008

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Transaction history of PROKHOROV MIKHAIL D

Co-insiders of PROKHOROV MIKHAIL D

McGuire Michael E JrPLUG POWER INC +1
MMC NORLISK NICKELPLUG POWER INC +1
NORILSK HOLDINGS SAPLUG POWER INC +1
POTANIN VLADIMIR OPLUG POWER INC +1
ACKERMAN TERRELLSTILLWATER MINING CO /DE/
Air Liquide Investissements d'Avenir et de DemonstrationPLUG POWER INC

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
STILLWATER MINING CO /DE/Listing unverified	Apr 25, 2008	Sell	-49,813,222	—	n/a (No price was disclosed in the filing)		SEC
PLUG POWER INCListing on record	Apr 25, 2008	SellD (derivative)	-49,370.06	—	n/a (No price was disclosed in the filing)		SEC
PLUG POWER INCListing on record	Apr 25, 2008	Sell	-640,803.29	—	n/a (No price was disclosed in the filing)		SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	5,800	3.13	$18.2K	conv 31Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	1,900	3.14	$6K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	9,300	3.11	$28.9K	conv 44ClusterFirst in 12mo	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	150	2.99	$448.5	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	500	3.00	$1.5K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	2,600	3.10	$8.1K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	5,200	3.03	$15.8K	conv 30Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	5,200	3.05	$15.9K	conv 30Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	200	3.04	$608	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	250	3.06	$765	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	100	3.05	$305	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	4,100	3.01	$12.3K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	4,100	3.01	$12.3K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	1,030	3.08	$3.2K	conv 44ClusterFirst in 12mo	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	9,870	3.09	$30.5K	conv 44ClusterFirst in 12mo	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	1,900	3.14	$6K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	250	3.06	$765	conv 44ClusterFirst in 12mo	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	2,600	3.12	$8.1K	conv 44ClusterFirst in 12mo	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	4,300	3.02	$13K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	4,800	3.07	$14.7K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	5,200	3.05	$15.9K	conv 30Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	5,800	3.13	$18.2K	conv 31Cluster	SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
STILLWATER MINING CO /DE/Listing unverified	Apr 25, 2008	Sell	-49,813,222	—	n/a (No price was disclosed in the filing)		SEC
PLUG POWER INCListing on record	Apr 25, 2008	SellD (derivative)	-49,370.06	—	n/a (No price was disclosed in the filing)		SEC
PLUG POWER INCListing on record	Apr 25, 2008	Sell	-640,803.29	—	n/a (No price was disclosed in the filing)		SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	5,800	3.13	$18.2K	conv 31Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	1,900	3.14	$6K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	9,300	3.11	$28.9K	conv 44ClusterFirst in 12mo	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	150	2.99	$448.5	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	500	3.00	$1.5K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	2,600	3.10	$8.1K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	5,200	3.03	$15.8K	conv 30Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	5,200	3.05	$15.9K	conv 30Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	200	3.04	$608	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	250	3.06	$765	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	100	3.05	$305	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	4,100	3.01	$12.3K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	4,100	3.01	$12.3K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	1,030	3.08	$3.2K	conv 44ClusterFirst in 12mo	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	9,870	3.09	$30.5K	conv 44ClusterFirst in 12mo	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	1,900	3.14	$6K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	250	3.06	$765	conv 44ClusterFirst in 12mo	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	2,600	3.12	$8.1K	conv 44ClusterFirst in 12mo	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	4,300	3.02	$13K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	4,800	3.07	$14.7K	conv 29Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	5,200	3.05	$15.9K	conv 30Cluster	SEC
PLUG POWER INCListing on record	Feb 8, 2008	Buy	5,800	3.13	$18.2K	conv 31Cluster	SEC