POWER SOLUTIONS INTERNATIONAL, INC.

Entry into a Material Definitive Agreement

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

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

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

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

Specialized Disclosure Report

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

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

Results of Operations and Financial Condition

Annual report pursuant to Section 13 or 15(d) (amendment)

Regulation FD Disclosure

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

Annual report pursuant to Section 13 or 15(d)

Regulation FD Disclosure

Results of Operations and Financial Condition

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 holder of more than 5% (Schedule 13D) (amendment)

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

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

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

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

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Specialized Disclosure Report

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

Results of Operations and Financial Condition

Annual report pursuant to Section 13 or 15(d) (amendment)

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

Annual report pursuant to Section 13 or 15(d)

Results of Operations and Financial Condition

Regulation FD Disclosure

Registration of Securities on Exchange (amendment)

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

Registration of Securities on Exchange

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

2.02,9.01

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

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Specialized Disclosure Report

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

Annual report pursuant to Section 13 or 15(d) (amendment)

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)

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Specialized Disclosure Report

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

Annual report pursuant to Section 13 or 15(d) (amendment)

Annual report pursuant to Section 13 or 15(d)

Notification of late filing of Form 10-K

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Specialized Disclosure Report

Specialized Disclosure Report

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Specialized Disclosure Report

Specialized Disclosure Report

No description available

Post Effective Amendment to S-8

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Specialized Disclosure Report

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Notification of removal from listing and/or registration on a national securities exchange

No description available

No description available

Specialized Disclosure Report

No description available

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Specialized Disclosure Report

Definitive Proxy Statement

Definitive Proxy Statement

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Notice of Effectiveness

Correspondence with the SEC

Letter from the SEC

Registration statement under Securities Act of 1933

Specialized Disclosure Report

Definitive Proxy Statement

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Prospectus Supplement for Delayed or Continuous Offering

Registration statement under Securities Act of 1933

Prospectus Supplement for Delayed or Continuous Offering

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

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

Prospectus Supplement for Delayed or Continuous Offering

Definitive Proxy Statement

Prospectus Supplement with Pricing Information

No description available

Notice of Effectiveness

Amended Initial Registration Statement

Hu Nan (Richard)

Hu Nan (Richard)

Li Xun

Du Zhaoying

Li Xun

Jin Zhao

Yang Xuesen

He Hong

Shea Courtney C.

Du Zhaoying

SIMPKINS FRANK P

Landini Kenneth W

Landini Kenneth W

Du Zhaoying

Du Zhaoying

Landini Kenneth W

Weichai America Corp.; Weichai Power Co., Ltd.; Shandong Heavy Industry Group Co., Ltd.