TECOGEN INC.

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Post-effective amendment to a registration statement

Notice of Effectiveness

Other Events

Registration statement under Securities Act of 1933

Amended Initial Registration Statement

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Submission of Matters to a Vote of Security Holders

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Definitive Proxy Statement

Other Events

Annual report pursuant to Section 13 or 15(d)

Results of Operations and Financial Condition

Regulation FD Disclosure

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Regulation FD Disclosure

Other Events

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Other Events

Prospectus Supplement with Pricing Information

Entry into a Material Definitive Agreement

Notice of Effectiveness

No description available

Amended Initial Registration Statement

Amended Initial Registration Statement

Amended Initial Registration Statement

Correspondence with the SEC

Correspondence with the SEC

Registration (IPO) statement under Securities Act of 1933

Letter from the SEC

Draft registration statement (confidential submission)

Submission of Matters to a Vote of Security Holders

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Registration of Securities on Exchange

Certification of approval for listing and registration on a national securities exchange

Entry into a Material Definitive Agreement

Regulation FD Disclosure

Definitive Proxy Statement

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Annual report pursuant to Section 13 or 15(d)

Results of Operations and Financial Condition

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

Preliminary Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Notification of the removal from listing and registration of matured redeemed or retired securities

Additional Information for Proxy Statement/ Votes

Correspondence with the SEC

Definitive Proxy Statement

Letter from the SEC

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

No description available

Panora Robert

Whiting John Kimball IV

Rangesh Abinand

Deschenes Roger P.

Lafaille Stephen

Rangesh Abinand

Whiting John Kimball IV

ALBERTINE JOHN M

Panora Robert

Lewis Earl

Ghoniem Ahmed

Galiteva Angelina

Lafaille Stephen

Deschenes Roger P.

Hirsch Susan B

Ghoniem Ahmed

Hirsch Susan B

Lewis Earl

Lewis Earl