# Mersana Therapeutics Inc. (MRSN)

Source: https://www.quantisnow.com/company/MRSN
Generated: 2026-11-09T10:22:10.751Z

- Ticker: MRSN
- Exchange: NASDAQ
- Sector: Health Care
- Industry: Biotechnology: Pharmaceutical Preparations
- IPO year: 2017
- Website: mersana.com

## About

Mersana Therapeutics, Inc., a clinical stage biopharmaceutical company, focuses on the development of antibody drug conjugates (ADC) for cancer patients with unmet need. The company develops XMT-1536, a Dolaflexin ADC targeting NaPi2b that is in Phase I clinical trial for the treatment of patients with ovarian cancer and non-small cell lung cancer (NSCLC) adenocarcinoma; and XMT-1592, a Dolasynthen ADC targeting NaPi2b-expressing tumors, which is in phase I clinical trial for the treatment of ovarian cancer and NSCLC adenocarcinoma. It also develops XMT-1660, a B7-H4-targeted Dolasynthen ADC candidate; and XMT-2056, an immunosynthen development candidate. The company 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. Mersana Therapeutics, Inc. was incorporated in 2001 and is headquartered in Cambridge, Massachusetts.

## Latest MRSN news and filings

- 2026-01-16 21:15 UTC [SEC Form 15-12G filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-15-12g-filed-by-mersana-therapeutics-inc-6352157)
- 2026-01-09 05:15 UTC [SEC Form EFFECT] [SEC Form EFFECT filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-effect-filed-by-mersana-therapeutics-inc-6343733)
- 2026-01-06 23:32 UTC [SEC Form 4] [Director Hack Andrew A. F. closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/director-hack-andrew-a-f-closing-all-direct-ownership-in-6339607)
- 2026-01-06 21:55 UTC [SEC Form 4] [Director Hege Kristen closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/director-hege-kristen-closing-all-direct-ownership-in-the-company-6339082)
- 2026-01-06 21:54 UTC [SEC Form 4] [Director Diaz Allene M. closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/director-diaz-allene-m-closing-all-direct-ownership-in-the-6339070)
- 2026-01-06 21:52 UTC [SEC Form 4] [Director Dere Willard H closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/director-dere-willard-h-closing-all-direct-ownership-in-the-6339053)
- 2026-01-06 21:51 UTC [SEC Form 4] [SVP, Chief Legal Officer Carvajal Alejandra closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/svp-chief-legal-officer-carvajal-alejandra-closing-all-direct-ownership-6339043)
- 2026-01-06 21:49 UTC [SEC Form 4] [SVP, Chief Development Bala Mohan closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/svp-chief-development-bala-mohan-closing-all-direct-ownership-in-6339036)
- 2026-01-06 21:48 UTC [SEC Form 4] [Director Alleva Lawrence M closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/director-alleva-lawrence-m-closing-all-direct-ownership-in-the-6339027)
- 2026-01-06 21:47 UTC [SEC Form 4] [President, CEO Huber Martin H. Jr. closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/president-ceo-huber-martin-h-jr-closing-all-direct-ownership-6339015)
- 2026-01-06 21:44 UTC [SEC Form 4] [VP, Chief Accounting Officer Mandelia Ashish closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/vp-chief-accounting-officer-mandelia-ashish-closing-all-direct-ownership-6338983)
- 2026-01-06 21:42 UTC [SEC Form 4] [Director Protopapas Anna closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/director-protopapas-anna-closing-all-direct-ownership-in-the-company-6338970)
- 2026-01-06 21:40 UTC [SEC Form 4] [SVP, Chief Sci.&Tech. Officer Lowinger Timothy B closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/svp-chief-scitech-officer-lowinger-timothy-b-closing-all-direct-6338961)
- 2026-01-06 21:39 UTC [SEC Form 4] [Director Mott David M closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/director-mott-david-m-closing-all-direct-ownership-in-the-6338943)
- 2026-01-06 21:38 UTC [SEC Form 4] [SVP, COO & CFO Deschuytner Brian closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/svp-coo-cfo-deschuytner-brian-closing-all-direct-ownership-in-6338933)
- 2026-01-06 21:19 UTC [SEC Form S-8 POS] [SEC Form S-8 POS filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-s-8-pos-filed-by-mersana-therapeutics-inc-6338630)
- 2026-01-06 21:17 UTC [SEC Form S-8 POS] [SEC Form S-8 POS filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-s-8-pos-filed-by-mersana-therapeutics-inc-6338585)
- 2026-01-06 21:16 UTC [SEC Form S-8 POS] [SEC Form S-8 POS filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-s-8-pos-filed-by-mersana-therapeutics-inc-6338552)
- 2026-01-06 21:15 UTC [SEC Form S-8 POS] [SEC Form S-8 POS filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-s-8-pos-filed-by-mersana-therapeutics-inc-6338520)
- 2026-01-06 21:14 UTC [SEC Form S-8 POS] [SEC Form S-8 POS filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-s-8-pos-filed-by-mersana-therapeutics-inc-6338485)
- 2026-01-06 21:12 UTC [SEC Form S-8 POS] [SEC Form S-8 POS filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-s-8-pos-filed-by-mersana-therapeutics-inc-6338451)
- 2026-01-06 21:10 UTC [SEC Form S-8 POS] [SEC Form S-8 POS filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-s-8-pos-filed-by-mersana-therapeutics-inc-6338428)
- 2026-01-06 21:09 UTC [SEC Form S-8 POS] [SEC Form S-8 POS filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-s-8-pos-filed-by-mersana-therapeutics-inc-6338403)
- 2026-01-06 21:08 UTC [SEC Form S-8 POS] [SEC Form S-8 POS filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-s-8-pos-filed-by-mersana-therapeutics-inc-6338368)
- 2026-01-06 21:01 UTC [SEC Form POS AM filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-pos-am-filed-by-mersana-therapeutics-inc-6338189)
- 2026-01-06 14:45 UTC [SEC Form 25-NSE filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-25-nse-filed-by-mersana-therapeutics-inc-6337666)
- 2026-01-06 14:25 UTC [SEC Form 8-K] [Mersana Therapeutics Inc. filed SEC Form 8-K: Termination of a Material Definitive Agreement, Completion of Acquisition or Disposition of Assets, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Material Modification to Rights of Security Holders, Changes in Control of Registrant, Leadership Update, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits](https://www.quantisnow.com/insight/mersana-therapeutics-inc-filed-sec-form-8-k-termination-of-a-6337652)
- 2026-01-06 14:23 UTC [SEC Schedule 14D-9] [Amendment: SEC Form SC 14D9/A filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/amendment-sec-form-sc-14d9a-filed-by-mersana-therapeutics-inc-6337650)
- 2026-01-06 14:02 UTC [Day One Completes Acquisition of Mersana Therapeutics](https://www.quantisnow.com/insight/day-one-completes-acquisition-of-mersana-therapeutics-6337613)
- 2025-12-29 13:33 UTC [SEC Schedule 14D-9] [Amendment: SEC Form SC 14D9/A filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/amendment-sec-form-sc-14d9a-filed-by-mersana-therapeutics-inc-6328000)
- 2025-12-05 21:23 UTC [SEC Schedule 14D-9] [SEC Form SC 14D9 filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-sc-14d9-filed-by-mersana-therapeutics-inc-6305174)
- 2025-11-24 22:12 UTC [SEC Form SCHEDULE 13G filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-schedule-13g-filed-by-mersana-therapeutics-inc-6292207)
- 2025-11-14 13:11 UTC [SEC Form 10-Q] [SEC Form 10-Q filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-10-q-filed-by-mersana-therapeutics-inc-6279121)
- 2025-11-14 12:08 UTC [SEC Form SC14D9C filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-sc14d9c-filed-by-mersana-therapeutics-inc-6278960)
- 2025-11-14 12:07 UTC [SEC Form 8-K] [Mersana Therapeutics Inc. filed SEC Form 8-K: Results of Operations and Financial Condition, Financial Statements and Exhibits](https://www.quantisnow.com/insight/mersana-therapeutics-inc-filed-sec-form-8-k-results-of-operations-6278959)
- 2025-11-14 12:00 UTC [Earnings Date] [Mersana Therapeutics Provides Business Update and Announces Third Quarter 2025 Financial Results](https://www.quantisnow.com/insight/mersana-therapeutics-provides-business-update-and-announces-third-quarter-2025-6278908)
- 2025-11-13 11:56 UTC [SEC Form SC14D9C filed by Mersana Therapeutics Inc.](https://www.quantisnow.com/insight/sec-form-sc14d9c-filed-by-mersana-therapeutics-inc-6275959)
- 2025-11-13 11:17 UTC [SEC Form 8-K] [Mersana Therapeutics Inc. filed SEC Form 8-K: Entry into a Material Definitive Agreement, Other Events, Financial Statements and Exhibits](https://www.quantisnow.com/insight/mersana-therapeutics-inc-filed-sec-form-8-k-entry-into-a-6275888)
- 2025-11-13 11:00 UTC [Day One Biopharmaceuticals to Acquire Mersana Therapeutics](https://www.quantisnow.com/insight/day-one-biopharmaceuticals-to-acquire-mersana-therapeutics-6275804)
- 2025-11-10 13:00 UTC [Earnings Date] [Mersana Therapeutics to Host Third Quarter 2025 Conference Call on November 14, 2025](https://www.quantisnow.com/insight/mersana-therapeutics-to-host-third-quarter-2025-conference-call-on-6269601)

## More

- Live page with ratings, short volume, options and peers: https://www.quantisnow.com/company/MRSN
- Earnings history: https://www.quantisnow.com/earnings/MRSN
- Dividend history: https://www.quantisnow.com/dividends/MRSN
- Insider transactions: https://www.quantisnow.com/insiders/MRSN
- Options chain: https://www.quantisnow.com/options/MRSN
- SEC 8-K filings only: https://www.quantisnow.com/company/MRSN/8-k
- RSS and alerts for MRSN: https://www.quantisnow.com/docs/rss-feeds.md