MRSN
Mersana Therapeutics Inc

MRSN.US mersana.com + Research + Basket
Healthcare · Biotechnology
CIK 0001442836
Employees 102
Phone 617 498 0020
Fiscal year end December
IPO Jun 28, 2017
Address 840 Memorial Drive, Cambridge, MA, United States, 02139
Price N/A
USD · NASDAQ
52-week range
7.54
30.39
Market Cap
145.36M
P/E Ratio
0.00
Forward P/E
0.00
Book Value
-11.91
Div. Yield
N/A
% Institutions
67.57%
% Insiders
1.47%
1 Year

-14.5%
3 Year

-79.0%
10 Year

-91.7%
Description
Mersana Therapeutics, Inc., a clinical-stage biopharmaceutical company, develops antibody-drug conjugates (ADC) for cancer patients with unmet needs. The company develops Emi-Le (XMT-1660), a B7-H4-targeting Dolasynthen ADC candidate, which is in Phase 1 clinical trial; and XMT-2056, an Immunosynthen ADC targeting a novel human epidermal growth factor receptor 2 that is in Phase 1 clinical trial. Its preclinical products portfolio includes XMT-2068 and XMT-2175. It has strategic research and development collaborations with Janssen Biotech, Inc., Ares Trading S.A., Merck KGaA, and Asana Biosciences, LLC for the development of ADC product candidates. 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. As of January 6, 2026, Mersana Therapeutics, Inc. operates as a subsidiary of Day One Biopharmaceuticals, Inc.
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People

▼
Directors & Officers

Name	Title	Year Born
Dr. Martin H. Huber M.D.	President, CEO & Director	1960
Mr. Brian C. DeSchuytner	Senior VP, CFO & COO	1978
Dr. Timothy B. Lowinger Ph.D.	Senior VP and Chief Science & Technology Officer	1964
Ms. Alejandra Veronica Carvajal J.D.	Senior VP, Secretary & Chief Legal Officer	1974
Dr. Mohan Bala Ph.D.	Senior VP & Chief Development Officer	1965
Mr. Mikhail Papisov Ph.D.	Co-Founder	NA
Mr. Ashish Mandelia	VP & Chief Accounting Officer	1975
Mr. Chuck Miller	Senior Vice President of Regulatory Affairs	NA
Insider Trading

Open insider trading
Date	Insider Name	Title	Transaction Type	Shares	Price	Value	SEC
Oct 27, 2025	Mohan Bala	N/A	Sale	77.00	$9.90	$762.30	SEC
Sep 12, 2025	Martin H Jr. Huber	N/A	Sale	2.01K	$7.31	$14.71K	SEC
Shareholders

▼
Institutional Holders

Holder Name	Shares	Date Reported	% Out	Value	% Change
Nextech Invest, Ltd.	12.07M	Mar 31, 2025	9.67%	$0.97	0.00%
Bain Capital Life Sciences Investors, LLC	8.66M	Mar 31, 2025	6.94%	$0.44	0.00%
Vanguard Group Inc	8.38M	Mar 31, 2025	6.71%	$0.00	18.71%
BlackRock Inc	8.33M	Mar 31, 2025	6.67%	$0.00	-9.55%
Schonfeld Strategic Advisors LLC	7.61M	Mar 31, 2025	6.10%	$0.02	259.22%
AQR Capital Management LLC	5.14M	Mar 31, 2025	4.12%	$0.00	0.00%
Rock Springs Capital Management LP	3.81M	Mar 31, 2025	3.06%	$0.08	11.16%
SILVERARC CAPITAL MANAGEMENT, LLC	3.09M	Mar 31, 2025	2.48%	$0.22	0.00%
State Street Corp	2.60M	Mar 31, 2025	2.09%	$0.00	-5.82%
Geode Capital Management, LLC	2.44M	Mar 31, 2025	1.96%	$0.00	0.00%
Catalio Capital Management, LP	1.71M	Mar 31, 2025	1.37%	$0.14	0.00%
683 Capital Management LLC	1.65M	Mar 31, 2025	1.32%	$0.04	83.33%
Jacobs Levy Equity Management, Inc.	1.33M	Mar 31, 2025	1.07%	$0.00	19.89%
5AM Venture Management, LLC	1.31M	Mar 31, 2025	1.05%	$0.17	0.00%
Qube Research & Technologies	1.17M	Mar 31, 2025	0.94%	$0.00	238.10%
Northern Trust Corp	864.79K	Mar 31, 2025	0.69%	$0.00	-6.98%
Renaissance Technologies Corp	839.92K	Mar 31, 2025	0.67%	$0.00	38.54%
Deutsche Bank AG	839.72K	Mar 31, 2025	0.67%	$0.00	0.00%
IEQ CAPITAL, LLC	707.02K	Mar 31, 2025	0.57%	$0.00	0.00%
Lion Point Capital, LP	644.00K	Mar 31, 2025	0.52%	$1.41	0.00%
Fund Holdings

Rank	Holder Name	Shares Held	% of Shares	Change	Date Reported
1	Vanguard Explorer Inv	2.01M	1.61%	▲ 0.00%	Jun 30, 2025
2	Vanguard VIF Small Co Gr	408.39K	0.33%	▲ 0.00%	Jun 30, 2025
3	Extended Equity Market Fund K	208.93K	0.17%	▼ 1.96%	Jun 30, 2025
4	Vanguard Total Stock Mkt Idx Inv	135.87K	2.72%	▼ 2.14%	Jul 31, 2025
5	Vanguard Market Neutral I	118.12K	0.09%	▲ 0.00%	Jun 30, 2025
6	NT Ext Equity Mkt Idx Fd - L	105.84K	0.08%	▲ 0.00%	Jun 30, 2025
7	Northern Trust Extended Eq Market Idx	105.84K	0.08%	▲ 0.00%	Jun 30, 2025
8	NT Ext Equity Mkt Idx Fd - NL	86.39K	0.07%	▲ 0.00%	Jun 30, 2025
9	NT Ext Equity Mkt Idx Fd - DC - NL - T2	67.08K	0.05%	▼ 0.25%	Jun 30, 2025
10	NT Col R2000 Val Idx Fd -DC -L -TierFour	56.40K	0.05%	▼ 49.73%	Mar 31, 2025
Financial Highlights

▼
Market Cap: $145.36M
EBITDA: $-66.29M
PEG Ratio: $0.00
Book Value: $-11.91
Earnings/Share: $-13.95
Profit Margin: -211.22%
Operating Margin: -67.91%
ROA (TTM): -36.27%
ROE (TTM): -505.14%
Revenue (TTM): $33.18M
Revenue/Share (TTM): $6.67
Earnings Growth (YOY): 0.00%
Revenue Growth (YOY): -12.60%
Valuation Metrics

Enterprise Value: $91.27M
Trailing P/E: 0.00
Forward P/E: 0.00
Shares Statistics

Shares Outstanding: 5.00M
Shares Float: 3.53M
% Insiders: 1.47%
% Institutions: 67.57%
Short % Float: 1.19%
Stock Price History

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10 Years Price History

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Financial Charts

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Open balance sheet Open capital intensity Download Financials (Excel)
Revenue, Net Income & Operating Cash Flow (Yearly)

Change % vs Prior Year

Revenue, Net Income & Operating Cash Flow (Quarterly)

Change % vs Prior Quarter

Operating Expenses (Yearly)

Operating Expenses (Quarterly)

Balance Sheet (Yearly)

Balance Sheet (Quarterly)

Assets Breakdown (Yearly)

Assets Breakdown (Quarterly)

Liabilities Breakdown (Yearly)

Liabilities Breakdown (Quarterly)

Income Statement Waterfall

▼
Line Item
Step Type
Value
Revenue
adjust
$40.50M
Cost of Goods Sold
adjust
$-1.63M
Gross Profit
subtotal
$40.50M
SG&A
adjust
$-40.81M
R&D
adjust
$-73.02M
Operating Income
subtotal
$-73.34M
Other / Non-Operating Items
adjust
$4.14M
Net Income
subtotal
$-69.19M
Earnings Per Share (EPS) History

▼
Financial Ratios

▼
📦 Raw API Data (JSON Explorer)

▼
Comprehensive raw data returned from the EOD Fundamentals API. Expand sections below to drill down.
{
    "General": {
        "Code": "MRSN",
        "Type": "Common Stock",
        "Name": "Mersana Therapeutics Inc",
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}
Mersana Therapeutics Inc

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