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Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
SEC Accession No. 0000078003-21-000014
Filing Date
2021-02-12
Accepted
2021-02-12 16:17:42
Documents
1

Document Format Files

Seq Description Document Type Size
1 MERSANA THERAPEUTICS SC 13G/A mersana13g_ax2x21.htm SC 13G/A 31442
  Complete submission text file 0000078003-21-000014.txt   33118
Mailing Address 235 E 42ND ST NEW YORK NY 10017
Business Address 235 E 42ND ST NEW YORK NY 10017 2125732323
PFIZER INC (Filed by) CIK: 0000078003 (see all company filings)

IRS No.: 135315170 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A
SIC: 2834 Pharmaceutical Preparations

Mailing Address 840 MEMORIAL DRIVE CAMBRIDGE MA 02139
Business Address 840 MEMORIAL DRIVE CAMBRIDGE MA 02139 617-498-0020
Mersana Therapeutics, Inc. (Subject) CIK: 0001442836 (see all company filings)

IRS No.: 000000000 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A | Act: 34 | File No.: 005-90033 | Film No.: 21627677
SIC: 2834 Pharmaceutical Preparations