Why insider trading matters?

When insiders buy shares on the open market, this can thus be regarded as a strong endorsement by those that know the company the best -- they are literally betting their own money on the company's future. Insider selling, however, is not necessarily meaningful in any way, as there is a range of reasons for insiders to liquidate (some) of the shares they own.

- Seeking Alpha
Mersana Therapeutics, Inc. (MRSN)
Sector: Healthcare; Industry: Biotechnology

Mersana Therapeutics, Inc., a clinical stage biopharmaceutical company focusing on the development of antibody drug conjugate (ADC) for cancer patients with unmet need. The company develops Dolaflexin, a platform, which is used to generate a pipeline of proprietary ADC product candidates to address patient populations that are not amenable to treat with traditional ADC-based therapies. Mersana Therapeutics, Inc. has a strategic research and development partnerships with Merck KGaA and Asana BioSciences, LLC for the development of ADC product candidates utilizing Fleximer. The company was formerly known as Nanopharma Corp. and changed its name to Mersana Therapeutics, Inc. in November 2005.


Trade Date Insider Title Buy/Sell #Shares Price Value Option
2021-01-12 Hack Andrew A. F. Director Buy 250,000 $18.36 $4,590,000 No
2021-01-04 Mandelia Ashish VP, Controller Sell 247 $26.76 $6,610 No
2020-12-21 Lowinger Timothy B Chief Science & Tech. Officer Sell 8,203 $25.60 $209,956 Yes
2020-11-20 Lowinger Timothy B Chief Science & Tech. Officer Sell 8,203 $23.05 $189,079 Yes
2020-10-21 Lowinger Timothy B Chief Science & Tech. Officer Sell 8,203 $17.12 $140,435 Yes
2020-09-21 Lowinger Timothy B Chief Science, Tech. Officer Sell 20,614 $20.66 $425,832 Yes
2020-09-14 Jack Eva M. Chief Bus. Officer, Tres, Sec. Sell 35,248 $22.00 $775,456 Yes
2020-06-01 Alleva Lawrence M Director Buy 1,085 $22.95 $24,901 No
2020-04-14 SANDELL SCOTT D 10%-Owner Sell 2,198 $9.04 $19,865 No
2020-04-13 BASKETT FOREST 10%-Owner Sell 3,190 $8.58 $27,358 No
2020-04-13 SANDELL SCOTT D 10%-Owner Sell 20,914 $8.50 $177,775 No
2020-04-13 Florence Anthony A. Jr. 10%-Owner Sell 20,914 $8.50 $177,775 No
2020-04-13 BASKETT FOREST 10%-Owner Sell 20,914 $8.50 $177,775 No
2019-08-28 New Enterprise Associates 14, L.P. 10%-Owner Sell 1,211 $2.91 $3,524 Yes
2020-04-07 Hack Andrew A. F. Director Buy 3,445,667 $5.99 $20,649,463 No
2020-04-07 MOTT DAVID M Director Buy 538,599 $5.59 $3,010,768 No
2019-03-05 MOTT DAVID M 10%-Owner, Director Buy 3,750,000 $4.00 $15,000,000 No
2019-03-05 New Enterprise Associates 14, L.P. 10%-Owner Buy 3,750,000 $4.00 $15,000,000 No
2018-09-24 Lowinger Timothy B Chief Scientific Officer Sell 3,500 $11.63 $40,705 Yes
2018-08-27 Lowinger Timothy B Chief Scientific Officer Sell 3,500 $13.15 $46,025 Yes
2018-07-23 Lowinger Timothy B Chief Scientific Officer Sell 3,500 $11.06 $38,710 No
2017-07-03 Viswanathan Ravi 10%-Owner Buy 1,000,000 $15.00 $15,000,000 Yes
2017-07-03 Sonsini Peter W. 10%-Owner Buy 1,000,000 $15.00 $15,000,000 Yes
2017-07-03 SANDELL SCOTT D 10%-Owner Buy 1,000,000 $15.00 $15,000,000 Yes
2017-07-03 MOTT DAVID M 10%-Owner, Director Buy 1,000,000 $15.00 $15,000,000 Yes
2017-07-03 KERINS PATRICK J 10%-Owner Buy 1,000,000 $15.00 $15,000,000 Yes
2017-07-03 Florence Anthony A. Jr. 10%-Owner Buy 1,000,000 $15.00 $15,000,000 Yes
2017-07-03 BASKETT FOREST 10%-Owner Buy 1,000,000 $15.00 $15,000,000 Yes
2017-07-03 BARRIS PETER J 10%-Owner Buy 1,000,000 $15.00 $15,000,000 Yes
2017-07-03 BARRETT M JAMES 10%-Owner Buy 1,000,000 $15.00 $15,000,000 Yes

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