Canaan Inc.

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

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

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

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Notice of Effectiveness

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

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

Post-effective amendment to a registration statement

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Post-effective amendment to a registration statement

Registration statement / Annual report / Transition report for Foreign Private Issuers

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Post-effective amendment to an automatic shelf registration statement

Post-effective amendment to a registration statement

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

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

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

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

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

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

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

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

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

Registration statement / Annual report / Transition report for Foreign Private Issuers (amendment)

Registration statement / Annual report / Transition report for Foreign Private Issuers

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

Prospectus Supplement for Primary Offering

No description available

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

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

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

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Notice of Effectiveness

Correspondence with the SEC

Registration statement for securities of certain foreign private issuers (amendment)

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Registration statement / Annual report / Transition report for Foreign Private Issuers

Registration statement for securities of certain foreign private issuers

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Notice of Effectiveness

Registration statement / Annual report / Transition report for Foreign Private Issuers

Post-effective amendment to an automatic shelf registration statement

Letter from the SEC

Registration statement / Annual report / Transition report for Foreign Private Issuers

Correspondence with the SEC

Letter from the SEC

Registration statement / Annual report / Transition report for Foreign Private Issuers (amendment)

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Registration statement / Annual report / Transition report for Foreign Private Issuers

Registration statement / Annual report / Transition report for Foreign Private Issuers

Zhang Nangeng

Zhang Nangeng

Cheng Jin

ZHANG Yaping ZY

SHU ZHITANG

ZHANG WENJUN

DU HONGCHAO

Cheng Jin

Zhang Nangeng

none