Company · CIK 0001442836 · SIC 2834 — Pharmaceutical Preparations
Mersana Therapeutics, Inc. · MRSN
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Mar 5, 2019 PForm 4 → | Mar 6, 4:39 pm EST | David M MottDirector, 10% Owner | 3,750,000 | $4.00 | $15,000,000 | 11,890,138 | +46.1% | plan? |
| Mar 5, 2019 PForm 4 → | Mar 6, 4:38 pm EST | New Enterprise Associates 14, L.P. +810% Owner | 3,750,000 | $4.00 | $15,000,000 | 11,890,138 | +46.1% | plan? |
| Sep 24, 2018 SForm 4 → | Sep 25, 5:07 pm EDT | Timothy B LowingerChief Scientific Officer | 3,500 | $11.63 | $40,705 | 12,491 | −21.9% | plan? |
| Sep 24, 2018 MForm 4 → | Sep 25, 5:07 pm EDT | Timothy B LowingerChief Scientific Officer | 3,500 | $1.40 | $4,900 | 15,991 | — | plan? |
| Aug 27, 2018 SForm 4 → | Aug 29, 4:24 pm EDT | Timothy B LowingerChief Scientific Officer | 3,500 | $13.15 | $46,025 | 12,491 | −21.9% | plan? |
| Aug 27, 2018 MForm 4 → | Aug 29, 4:24 pm EDT | Timothy B LowingerChief Scientific Officer | 3,500 | $7.43 | $26,005 | 15,991 | — | plan? |
| Jul 23, 2018 SForm 4 → | Jul 25, 4:04 pm EDT | Timothy B LowingerChief Scientific Officer | 3,500 | $11.06 | $38,710 | 12,491 | −21.9% | plan? |
| Jul 3, 2018 MForm 4 → | Jul 5, 6:59 pm EDT | Timothy B LowingerChief Scientific Officer | 10,000 | $1.40 | $14,000 | 15,991 | — | plan? |
| Feb 21, 2018 MForm 4 → | Feb 23, 4:01 pm EST | Timothy B LowingerChief Scientific Officer | 5,911 | $6.98 | $41,259 | 5,911 | — | plan? |
| Jan 30, 2018 MForm 4 → | Feb 1, 4:01 pm EST | Wayne FosterVice President of Finance | 14,705 | $3.03 | $44,582 | 71,083 | — | plan? |
| Dec 20, 2017 MForm 4 → | Dec 21, 4:06 pm EST | Anna ProtopapasPresident and CEO, Director | 10,417 | $1.53 | $15,938 | 130,719 | — | plan? |
| Jul 3, 2017 PForm 4 → | Jul 6, 5:20 pm EDT | Ravi Viswanathan10% Owner | 1,000,000 | $15.00 | $15,000,000 | 8,140,138 | +14.0% | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:20 pm EDT | Ravi Viswanathan10% Owner | 7,140,138 | — | — | 7,140,138 | — | plan? |
| Jul 3, 2017 PForm 4 → | Jul 6, 5:19 pm EDT | Peter W. Sonsini10% Owner | 1,000,000 | $15.00 | $15,000,000 | 8,140,138 | +14.0% | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:19 pm EDT | Peter W. Sonsini10% Owner | 7,140,138 | — | — | 7,140,138 | — | plan? |
| Jul 3, 2017 PForm 4 → | Jul 6, 5:19 pm EDT | Scott D Sandell10% Owner | 1,000,000 | $15.00 | $15,000,000 | 8,140,138 | +14.0% | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:19 pm EDT | Scott D Sandell10% Owner | 7,140,138 | — | — | 7,140,138 | — | plan? |
| Jul 3, 2017 PForm 4 → | Jul 6, 5:18 pm EDT | David M MottDirector, 10% Owner | 1,000,000 | $15.00 | $15,000,000 | 8,140,138 | +14.0% | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:18 pm EDT | David M MottDirector, 10% Owner | 7,140,138 | — | — | 7,140,138 | — | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:18 pm EDT | Anna ProtopapasPresident and CEO, Director | 72,263 | — | — | 192,565 | — | plan? |
| Jul 3, 2017 PForm 4 → | Jul 6, 5:18 pm EDT | Patrick J Kerins10% Owner | 1,000,000 | $15.00 | $15,000,000 | 8,140,138 | +14.0% | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:18 pm EDT | Patrick J Kerins10% Owner | 7,140,138 | — | — | 7,140,138 | — | plan? |
| Jul 3, 2017 PForm 4 → | Jul 6, 5:17 pm EDT | Anthony A. Florence Jr.10% Owner | 1,000,000 | $15.00 | $15,000,000 | 8,140,138 | +14.0% | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:17 pm EDT | Anthony A. Florence Jr.10% Owner | 7,140,138 | — | — | 7,140,138 | — | plan? |
| Jul 3, 2017 PForm 4 → | Jul 6, 5:17 pm EDT | Forest Baskett10% Owner | 1,000,000 | $15.00 | $15,000,000 | 8,140,138 | +14.0% | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:17 pm EDT | Forest Baskett10% Owner | 7,140,138 | — | — | 7,140,138 | — | plan? |
| Jul 3, 2017 PForm 4 → | Jul 6, 5:16 pm EDT | Peter J Barris10% Owner | 1,000,000 | $15.00 | $15,000,000 | 8,140,138 | +14.0% | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:16 pm EDT | Peter J Barris10% Owner | 7,140,138 | — | — | 7,140,138 | — | plan? |
| Jul 3, 2017 PForm 4 → | Jul 6, 5:16 pm EDT | M James Barrett10% Owner | 1,000,000 | $15.00 | $15,000,000 | 8,140,138 | +14.0% | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:16 pm EDT | M James Barrett10% Owner | 7,140,138 | — | — | 7,140,138 | — | plan? |
| Jul 3, 2017 PForm 4 → | Jul 6, 5:16 pm EDT | New Enterprise Associates 14, L.P. +210% Owner | 1,000,000 | $15.00 | $15,000,000 | 8,140,138 | +14.0% | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:16 pm EDT | New Enterprise Associates 14, L.P. +210% Owner | 7,140,138 | — | — | 7,140,138 | — | plan? |
| Jul 3, 2017 CForm 4 → | Jul 6, 10:41 am EDT | FMR LLCOther | 1,329,981 | — | — | 1,329,981 | — | plan? |
Reported at this company — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Jan 23, 2019 AForm 4 → | Jan 25, 4:07 pm EST | Eva M. JackCBO, Treasurer & Secretary | 60,000 | — | — | 60,000 | — | |
| Jan 23, 2019 AForm 4 → | Jan 25, 4:07 pm EST | David A SpellmanChief Financial Officer | 100,000 | — | — | 100,000 | — | |
| Jan 23, 2019 AForm 4 → | Jan 25, 4:06 pm EST | Michael J. KaufmanSr VP Chemistry, Man & Control | 60,000 | — | — | 60,000 | — | |
| Jan 23, 2019 AForm 4 → | Jan 25, 4:06 pm EST | Timothy B LowingerChief Scientific Officer | 60,000 | — | — | 60,000 | — | |
| Jan 23, 2019 AForm 4 → | Jan 25, 4:05 pm EST | Anna ProtopapasPresident & CEO, Director | 217,500 | — | — | 217,500 | — | |
| Jan 23, 2019 AForm 4 → | Jan 25, 4:05 pm EST | Wayne FosterVice President of Finance | 30,750 | — | — | 30,750 | — | |
| Jan 2, 2019 AForm 4 → | Jan 4, 4:34 pm EST | David M MottDirector, 10% Owner | 25,292 | — | — | 25,292 | — | |
| Jan 2, 2019 AForm 4 → | Jan 4, 4:01 pm EST | Willard H DereDirector | 13,619 | — | — | 13,619 | — | |
| Jan 2, 2019 AForm 4 → | Jan 4, 4:00 pm EST | Lawrence M AllevaDirector | 13,619 | — | — | 13,619 | — | |
| Nov 30, 2018 AForm 4 → | Dec 3, 4:16 pm EST | Dirk HuebnerChief Medical Officer | 100,000 | — | — | 100,000 | — | |
| Sep 24, 2018 MForm 4 → | Sep 25, 5:07 pm EDT | Timothy B LowingerChief Scientific Officer | 3,500 | — | — | 89,833 | — | |
| Sep 20, 2018 AForm 4 → | Sep 21, 4:50 pm EDT | David M MottDirector, 10% Owner | 10,000 | — | — | 10,000 | — | |
| Sep 20, 2018 AForm 4 → | Sep 21, 4:01 pm EDT | Lawrence M AllevaDirector | 10,000 | — | — | 10,000 | — | |
| Sep 20, 2018 AForm 4 → | Sep 21, 4:01 pm EDT | Kristen HegeDirector | 10,000 | — | — | 10,000 | — | |
| Sep 20, 2018 AForm 4 → | Sep 21, 4:00 pm EDT | Andrew A. F. HackDirector | 10,000 | — | — | 10,000 | — | |
| Aug 27, 2018 MForm 4 → | Aug 29, 4:24 pm EDT | Timothy B LowingerChief Scientific Officer | 3,500 | — | — | 1,611 | — | |
| Jul 3, 2018 MForm 4 → | Jul 5, 6:59 pm EDT | Timothy B LowingerChief Scientific Officer | 10,000 | — | — | 93,333 | — | |
| Mar 19, 2018 AForm 4 → | Mar 21, 5:19 pm EDT | Willard H DereDirector | 20,000 | — | — | 20,000 | — | |
| Mar 12, 2018 AForm 4 → | Mar 14, 4:49 pm EDT | David A SpellmanChief Financial Officer | 150,000 | — | — | 150,000 | — | |
| Feb 21, 2018 MForm 4 → | Feb 23, 4:01 pm EST | Timothy B LowingerChief Scientific Officer | 5,911 | — | — | 0 | — | |
| Feb 2, 2018 AForm 4 → | Feb 6, 4:28 pm EST | Timothy B LowingerChief Scientific Officer | 56,884 | — | — | 56,884 | — | |
| Feb 2, 2018 AForm 4 → | Feb 6, 4:27 pm EST | Anna ProtopapasPresident & CEO, Director | 200,000 | — | — | 200,000 | — | |
| Feb 2, 2018 AForm 4 → | Feb 6, 4:27 pm EST | Eva M. JackCBO, Treasurer & Secretary | 50,057 | — | — | 50,057 | — | |
| Feb 2, 2018 AForm 4 → | Feb 6, 4:26 pm EST | Wayne FosterVice President of Finance | 20,250 | — | — | 20,250 | — | |
| Feb 2, 2018 AForm 4 → | Feb 6, 4:25 pm EST | Michael J. KaufmanSr.VP Chemistry,Man. & Control | 50,057 | — | — | 50,057 | — | |
| Feb 2, 2018 AForm 4 → | Feb 6, 4:24 pm EST | Donald A BergstromChief Medical Officer | 56,884 | — | — | 56,884 | — | |
| Jan 30, 2018 MForm 4 → | Feb 1, 4:01 pm EST | Wayne FosterVice President of Finance | 14,705 | — | — | 10,834 | — | |
| Jan 2, 2018 AForm 4 → | Jan 4, 4:31 pm EST | Sara M. NayeemDirector | 3,560 | — | — | 3,560 | — | |
| Jan 2, 2018 AForm 4 → | Jan 4, 4:30 pm EST | David M MottDirector, 10% Owner | 6,611 | — | — | 6,611 | — | |
| Jan 2, 2018 AForm 4 → | Jan 4, 4:03 pm EST | Kristen HegeDirector | 3,560 | — | — | 3,560 | — | |
| Jan 2, 2018 AForm 4 → | Jan 4, 4:03 pm EST | Lawrence M AllevaDirector | 3,560 | — | — | 3,560 | — | |
| Dec 20, 2017 MForm 4 → | Dec 21, 4:06 pm EST | Anna ProtopapasPresident and CEO, Director | 10,417 | — | — | 748,366 | — | |
| Sep 5, 2017 AForm 4 → | Sep 7, 4:43 pm EDT | Lawrence M AllevaDirector | 20,000 | — | — | 20,000 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:20 pm EDT | Ravi Viswanathan10% Owner | 32,149,218 | — | — | 0 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:19 pm EDT | Peter W. Sonsini10% Owner | 32,149,218 | — | — | 0 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:19 pm EDT | Scott D Sandell10% Owner | 32,149,218 | — | — | 0 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:18 pm EDT | David M MottDirector, 10% Owner | 32,149,218 | — | — | 0 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:18 pm EDT | Anna ProtopapasPresident and CEO, Director | 325,189 | — | — | 0 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:18 pm EDT | Patrick J Kerins10% Owner | 32,149,218 | — | — | 0 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:17 pm EDT | Anthony A. Florence Jr.10% Owner | 32,149,218 | — | — | 0 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:17 pm EDT | Forest Baskett10% Owner | 32,149,218 | — | — | 0 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:16 pm EDT | Peter J Barris10% Owner | 32,149,218 | — | — | 0 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:16 pm EDT | M James Barrett10% Owner | 32,149,218 | — | — | 0 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 5:16 pm EDT | New Enterprise Associates 14, L.P. +210% Owner | 32,149,218 | — | — | 0 | — | |
| Jul 3, 2017 CForm 4 → | Jul 6, 10:41 am EDT | FMR LLCOther | 1,329,981 | — | — | 0 | — |