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Form SC 13G - Statement of acquisition of beneficial ownership by individuals:
SEC Accession No. 0001172661-17-001351
Filing Date
2017-07-07
Accepted
2017-07-07 16:32:38
Documents
1

Document Format Files

Seq Description Document Type Size
1 13G mrsn062817.htm SC 13G 84015
  Complete submission text file 0001172661-17-001351.txt   85606
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 | Act: 34 | File No.: 005-90033 | Film No.: 17955532
SIC: 2834 Pharmaceutical Preparations

Mailing Address 650 SOUTH EXETER STREET SUITE 1070 BALTIMORE MD 21202
Business Address 650 SOUTH EXETER STREET SUITE 1070 BALTIMORE MD 21202 4102200129
Rock Springs Capital Management LP (Filed by) CIK: 0001595725 (see all company filings)

IRS No.: 800944416 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G