| Accession Number: | 0001104659-20-081224 |
| Date: | 2020-07-02 |
| Issuer: | MERSANA THERAPEUTICS, INC. (MRSN) |
| Original Submission Date: |
MANDELIA ASHISH
C/O MERSANA THERAPEUTICS, INC.
840 MEMORIAL DRIVE
CAMBRIDGE, MA 02139
| Title of Security | Transaction Date | 2a. Deemed Execution Date | Transaction Code | Shares | Acquired or Disposed | Price per share | 5. Amount of Securities Beneficially Owned Following Reported Transaction | 6. Ownership Form Direct or Indirect | Nature of Indirect Ownership |
|---|---|---|---|---|---|---|---|---|---|
| COMMON STOCK | 2020-06-30 | P | 3,383 | a | $4.87 | 3,383 | direct | ||
| COMMON STOCK | 2020-07-02 | S | 3,383 | d | $22.49 | 0 | direct |
| Title of Derivative Security | Conversion or Exercise Price of Derivative Security | Transaction Date | Deemed Execution Date | Transaction Code | Number of Derivative Securities Acquired (A) or Disposed of (D) | Date Exercisable | Expiration Date | Title and Amount of Securities Underlying Derivative Security | Price of Derivative Security | Number of derivative Securities Beneficially Owned Following Reported Transaction(s) | Ownership Form: Direct (D) or Indirect (I) | Nature of Indirect Beneficial Ownership |
|---|
| ID | footnote |
|---|---|
| f1 | transaction made pursuant to issuer's 2017 employee stock purchase program ("espp"), for the espp purchase period of january 1, 2020 through june 30, 2020. |
| f2 | in accordance with the espp, these shares were purchased at a price equal to 85% of the closing price of issuer's common stock december 31, 2019. |
| f3 | transaction made pursuant to the reporting person's company-approved trading plan under rule 10b5-1. |
