All prices and market caps shown in US$. Prices shown for non-US stocks based on exchange rates at the time this table is updated.
* Market capitalization = shares outstanding (S.O.) multiplied by share price. The total value assigned to the company by the stock market.
** Currency conversion rates used in this week's table:  UK£1.00 = $2.0498 ; €1 = $1.4295
*** Shares Outstanding
^† The change in closing price for the week as quoted in native currency (or the lack thereof) was offset by the change in exchange rate.
¹ BLDP: Ballard Power Systems Inc. S.O. as of 7/13/07 per SEC filing of 7/26/07. Volume on NASDAQ only, also trades on Toronto exchange:"BLD".
² F3C.F: SFC Smart Fuel Cell AG. Based in Brunnthal, Germany. IPO on 5/25/07. S.O. per Q3 Report. Prices and volume per XETRA (Germany). Volume on Frankfurt exchange not reflected. Float per press release of 5/24/07 announcing details of IPO. Share price and market cap converted from Euros (€) by H2FC.
³ QTWW: Quantum Fuel Systems Technologies Worldwide Inc. S.O. as of 7/2/07 per 10-K filed 7/17/07. Float based on S.O. less ~8.59M shares owned by insiders and 1M shares owned by GM (see proxy).
⁴ IDA.L: IdaTech LLC. IPO on London Stock Exchange (AIM) on 8/6/07. Share price and market cap converted from UK£ by H2FC. S.O. and float as of 8/6/07 per idatech.com. See index of H2FC coverage of IdaTech here.
⁵ PLUG: Plug Power. S.O. as of 8/5/07 per 10-Q filed 8/9/07. S.O. does not reflect 395,000 shares of Class B Capital Stock convertible into 39,500,000 shares of common stock sold to Smart Hydrogen Inc. on 6/29/06.
⁶ MDTL: Medis Technologies Ltd. S.O. as of 8/3/07 per 10-Q filed 8/9/07. Does not reflect common share underlying outstanding convertible preferred stock. Float calculated by H2FC as of 3/12/07 based on S.O. shown above minus 18.93M shares held by the top five "beneficial owners" of MDTL (see proxy statement filed 5/1/2006, page 13), none of whom have ever sold any of their shares (see Medis' "Form 4s").
⁷ DESC: Distributed Energy Systems Corp. S.O. as of 8/2/07 per 10-Q filed 8/8/07. Estimate of float based on number of shares shown to be "beneficially owned" in most recent Proxy.
⁹ HYGS: Hydrogenics S.O. as of 6/30/07 per "Management’s Discussion and Analysis" filed 8/10/07. Estimate of float based on email from company official received 11/17/06. Also trades on Toronto exchange as HYG.
¹⁰ PYF.L: PolyFuel. Based in Mountain View, CA. Trades on London Exchange (AIM); share price and market cap converted from UK£ by H2FC. S.O. and float as of 6/30/07 per ir.polyfuel.com/pyf/stockinfo/.
¹¹ FCEL: FuelCell Energy Inc. S.O. as of 9/6/07, per 10-Q filed 9/10/07, including 3.8M unregistered shares issued to POSCO.
¹² MKTY: Mechanical Technology Inc. S.O. as of 8/6/07 per 10-Q filed 8/9/07.
¹³ PTX.L: Protonex. Based near Boston. Trades on London Stock Exchange (AIM); share price and market cap converted from UK£ by H2FC. S.O. and float as of 7/13/07 per protonex.com/legal.html: " As of July 13, 2007, there were 64,756,060 common shares of the Company issued and outstanding. And as of that date and as far as the Company is aware, the percentage of these shares not in public hands is 34.66%."
¹⁴ MCEL: Millennium Cell, Inc.S.O. as of10/19/07 per 8-K filed 10/19/07. S.O. includes 7,936,508 unregistered shares issued to Horizon on 10/19/07.
¹⁵ CFU.L: Ceramic Fuel Cells Ltd. Company based in Australia. Began trading on London Stock Exchange (AIM) as "CFU" on 3/2/2006. Also quoted on Australian Stock Exchange as "CFU". Share price and market cap converted from UK£ by H2FC. Volume shown here for AIM only. S.O. and float as of 8/13/07 per cfcl.com.au/Information_for_AIM_Investors/.
¹⁶ ITM.L: ITM Power. Trades on London Stock Exchange (AIM); share price and market cap converted from UK£ by H2FC. S.O. as of 6/20/07 per Regulatory Announcement of 6/20/07.
¹⁷ CWR.L: Ceres Power. IPO on London Stock Exchange (AIM) on 11/25/04. Share price and market cap converted from UK£ by H2FC. S.O. per "Regulatory Announcement" of 9/28/07. Float based on cerespower.com/investor/info.htm: "The directors have been notified that 4.2% of the shares in issue are not in public hands."
¹⁸ NPWS.OB: Neah Power Systems. Trades on NASDAQ Over the Counter Bulletin Board. S.O. as of 7/31/07 per 10-Q filed 8/20/07. Float based on phone call to CFO on 5/4/07. H2FC discussion of Neah here (1/14/07).