Filing Details

Accession Number:
0001104659-20-107831
Form Type:
4
Zero Holdings:
No
Publication Time:
2020-09-23 16:30:18
Reporting Period:
2020-09-21
Accepted Time:
2020-09-23 16:30:18
SEC Url:
Form 4 Filing
Issuer
Cik Name Symbol Sector (SIC) IRS No
1442836 Mersana Therapeutics Inc. MRSN Pharmaceutical Preparations (2834) 000000000
Insiders
Cik Name Reported Address Insider Title Director Officer Large Shareholder Other
1709775 B Timothy Lowinger C/O Mersana Therapeutics, Inc.
840 Memorial Drive
Cambridge MA 02139
Chief Science, Tech. Officer No Yes No No
Reported Non-Derivative Transactions
Sec. Name Acquisiton - Disposition Date Amount Price Remaning Holdings Equity Swap Involved Form Type Code Nature of Ownership Explanation
Common Stock Acquisiton 2020-09-21 3,749 $3.51 16,160 No 4 M Direct
Common Stock Disposition 2020-09-21 3,749 $20.66 12,411 No 4 S Direct
Common Stock Acquisiton 2020-09-21 4,454 $6.16 16,865 No 4 M Direct
Common Stock Disposition 2020-09-21 4,454 $20.66 12,411 No 4 S Direct
Common Stock Disposition 2020-09-21 12,411 $20.66 0 No 4 S Direct
Equity Swap Involved Form Type Code Nature of Ownership Explanation
No 4 M Direct
No 4 S Direct
No 4 M Direct
No 4 S Direct
No 4 S Direct
Reported Derivative Transactions
Sec. Name Sec. Type Acquisiton - Disposition Date Amount Price Amount - 2 Price - 2
Common Stock Stock Option (right to buy) Disposition 2020-09-21 3,749 $0.00 3,749 $3.51
Common Stock Stock Option (right to buy) Disposition 2020-09-21 4,454 $0.00 4,454 $6.16
Remaning Holdings Exercise Date Expiration Date Equity Swap Involved Transaction Form Type Transaction Code Nature of Ownership
38,426 2029-01-23 No 4 M Direct
115,043 2030-01-15 No 4 M Direct
Footnotes
  1. The stock option exercises reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 12, 2020.
  2. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 12, 2020.
  3. The options vest in equal quarterly installments over the first four years after the vesting commencement date, January 23, 2019.
  4. The options vest in equal quarterly installments over the first four years after the vesting commencement date, January 15, 2020.