SEC Form 4 · accession 0001012975-16-001505
Sesen Bio, Inc. · SESN
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owners
Noubar Afeyan
10% Owner
Edwin M Kania Jr.
10% Owner
Flagship Ventures Fund IV, L.P.
10% Owner
Flagship Ventures Fund 2007, L.P.
10% Owner
Flagship Ventures Fund IV-Rx, L.P.
10% Owner
Period of report
Sep 19, 2016
Accepted (ET)
Sep 21, 2016 · 5:37 pm EDT
Rule 10b5-1 plan
unknown — predates the checkbox
Issuer CIK
0001485003
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF4,F1 | Sep 19, 2016 | S | 7,761 | $3.31 | D | 1,082,996 | D | |
| Common StockF4,F2 | Sep 19, 2016 | S | 1,939 | $3.31 | D | 270,738 | D | |
| Common StockF5,F1 | Sep 20, 2016 | S | 43,139 | $3.39 | D | 1,039,857 | D | |
| Common StockF5,F2 | Sep 20, 2016 | S | 10,778 | $3.39 | D | 259,960 | D | |
| Common StockF6,F1 | Sep 21, 2016 | S | 258,214 | $3.75 | D | 781,643 | D | |
| Common StockF6,F2 | Sep 21, 2016 | S | 64,509 | $3.75 | D | 195,451 | D | |
| Common StockF3 | holding | — | — | — | 1,833,802 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1Held by Flagship Ventures Fund IV, L.P. ("Flagship IV"). Flagship Ventures Fund IV General Partner LLC ("Flagship IV LLC") is the general partner of Flagship IV. Noubar B. Afeyan, Ph.D. and Edwin M. Kania, Jr. are the managers of Flagship IV LLC. Flagship IV LLC and each of these individuals may be deemed to share voting and investment power with respect to all shares held by Flagship IV. Each of the filing persons, other than Flagship IV, disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein.
- F2Held by Flagship Ventures Fund IV-Rx, L.P. ("Flagship IV-Rx"). Flagship IV LLC is the general partner of Flagship IV Rx. Noubar B. Afeyan, Ph.D. and Edwin M. Kania, Jr. are the managers of Flagship IV LLC. Flagship IV LLC and each of these individuals may be deemed to share voting and investment power with respect to all shares held by Flagship IV-Rx. Each of the filing persons, other than Flagship IV-Rx, disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein.
- F3Held by Flagship Ventures Fund 2007, L.P. ("Flagship 2007"). Flagship Ventures 2007 General Partner LLC ("Flagship 2007 LLC") is the general partner of Flagship 2007. Noubar B. Afeyan, Ph.D. and Edwin M. Kania, Jr. are the managers of Flagship 2007 LLC. Flagship 2007 LLC and each of these individuals may be deemed to share voting and investment power with respect to all shares held by Flagship 2007. Each of the filing persons, other than Flagship 2007, disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein.
- F4The transactions were executed in multiple trades at prices ranging from $3.30 to $3.37. The price above reflects the weighted average sales price. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer or a security holder of the Issuer.
- F5The transactions were executed in multiple trades at prices ranging from $3.32 to $3.49. The price above reflects the weighted average sales price. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer or a security holder of the Issuer.
- F6The transactions were executed in multiple trades at prices ranging from $3.45 to $4.23. The price above reflects the weighted average sales price. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer or a security holder of the Issuer.