0001044321-13-000051.txt : 20130219 0001044321-13-000051.hdr.sgml : 20130219 20130219162439 ACCESSION NUMBER: 0001044321-13-000051 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20130214 FILED AS OF DATE: 20130219 DATE AS OF CHANGE: 20130219 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: PLUG POWER INC CENTRAL INDEX KEY: 0001093691 STANDARD INDUSTRIAL CLASSIFICATION: ELECTRICAL INDUSTRIAL APPARATUS [3620] IRS NUMBER: 223672377 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 968 ALBANY-SHAKER ROAD CITY: LATHAM STATE: NY ZIP: 12110 BUSINESS PHONE: 5187827700 MAIL ADDRESS: STREET 1: 968 ALBANY-SHAKER ROAD CITY: LATHAM STATE: NY ZIP: 12110 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: MARXE AUSTIN W & GREENHOUSE DAVID M CENTRAL INDEX KEY: 0001044321 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-34392 FILM NUMBER: 13623735 BUSINESS ADDRESS: STREET 1: C/O SPECIAL SITUATIONS FUNDS STREET 2: 527 MADISON AVENUE, SUITE 2600 CITY: NEW YORK STATE: NY ZIP: 10022 BUSINESS PHONE: 2122076500 MAIL ADDRESS: STREET 1: C/O SPECIAL SITUATIONS FUNDS STREET 2: 527 MADISON AVENUE, SUITE 2600 CITY: NEW YORK STATE: NY ZIP: 10022 4 1 primary_doc.xml PRIMARY DOCUMENT X0306 4 2013-02-14 1 0001093691 PLUG POWER INC PLUG 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M C/O SPECIAL SITUATIONS FUNDS 527 MADISON AVENUE, SUITE 2600 NEW YORK NY 10022 0 0 1 0 Common Stock 2013-02-14 4 S 0 2000000 0.1234 D 6511620 I By Limited Partnerships Common Stock 2013-02-14 4 S 0 5000000 0.134 D 1511620 I By Limited Partnerships This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Fund III QP, L.P. (SSFQP), Special Situations Cayman Fund, L.P. (Cayman), Special Situations Private Equity Fund, L.P. (PE), Special Situations Technology Fund, L.P. (Tech) and Special Situations Technology Fund II, L.P. (Tech2). 561,004 shares of Common Stock are held by SSFQP, 168,715 shares of Common Stock are held by Cayman, 103,251 shares of Common Stock are held by PE, 94,293 shares of Common Stock are held by Tech and 584,357 shares of Common Stock are held by Tech2. The interest of Marxe and Greenhouse in the shares of Common Stock owned by SSFQP, Cayman, PE, Tech and Tech2 is limited to the extent of his pecuniary interest. This is a weighed average price. Austin W. Marxe 2013-02-19 David M. Greenhouse 2013-02-19