Ablynx NV

FY: Dec 31 2017

FY: Dec 31 2017

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

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

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

Certification of termination of registration of a class of securities (Section 12(b))

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

Prospectus Supplement with Pricing Information

No description available

Notice of Effectiveness

Registration of Securities on Exchange

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

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

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

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

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

Post-effective amendment to an American depositary receipts registration statement

Registration statement for securities of certain foreign private issuers

Notice of Effectiveness

Registration statement under the Securities Act of 1933 for depositary shares evidenced by American depositary receipts

Sanofi

Sanofi

none

none

none

Ablynx NV

Sanofi

none

none

none

none

none

none

none

none

VAN HERK INVESTMENTS B.V.

none

FMR LLC

none

none

No description available

No description available

No description available

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Draft registration statement (confidential submission) (amendment)

No description available

Draft registration statement (confidential submission) (amendment)

Letter from the SEC

Draft registration statement (confidential submission) (amendment)

Draft registration statement (confidential submission) (amendment)

No description available

Draft registration statement (confidential submission) (amendment)

Letter from the SEC

Draft registration statement (confidential submission) (amendment)

No description available

Letter from the SEC

Draft registration statement (confidential submission)