Mersana Therapeutics, Inc. (MRSN) Stock Price History
Historical prices from 2017 to 2026
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MRSN Historical Performance
Short-Term Returns
MRSN Stock Price Trajectory (2017–2026)
As of May 8, 2026, Mersana Therapeutics, Inc. (MRSN) trades at $29.08, representing a +257.7% return over the past year. The stock has delivered a -92.5% total return over five years (-40.4% CAGR), reflecting challenging market conditions.
The stock reached its all-time high of $727.25 on December 29, 2020. From this peak, MRSN has corrected -96.0%, currently trading 143% above its 200-day moving average, indicating continued institutional support.
When compared to Healthcare sector peers RCUS (+209.6% 1Y), SNDX (+105.6% 1Y), and AGEN (+27.1% 1Y), MRSN has underperformed the peer group average. Compare MRSN vs RCUS →
MRSN Historical Price Data (2025–2026)
Showing 30 of 2,143 recordsLoading full history…
| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-01-06 | 29.08 | 29.08 | 29.08 | 29.08 | 0 | 0.00% |
| 2026-01-05 | 28.90 | 30.39 | 28.78 | 29.08 | 710K | +0.14% |
| 2026-01-02 | 29.00 | 29.33 | 28.73 | 29.04 | 103K | +0.38% |
| 2025-12-31 | 28.48 | 28.96 | 28.48 | 28.93 | 175K | +0.98% |
| 2025-12-30 | 28.56 | 28.98 | 28.11 | 28.65 | 303K | -0.28% |
| 2025-12-29 | 28.87 | 29.11 | 28.40 | 28.73 | 150K | -1.19% |
| 2025-12-26 | 29.10 | 29.15 | 28.91 | 29.07 | 82K | -0.09% |
| 2025-12-24 | 29.01 | 29.14 | 29.00 | 29.10 | 14K | +0.34% |
| 2025-12-23 | 28.88 | 29.07 | 28.85 | 29.00 | 61K | +0.28% |
| 2025-12-22 | 28.91 | 29.12 | 28.86 | 28.92 | 32K | -0.07% |
| 2025-12-19 | 29.29 | 29.39 | 28.84 | 28.94 | 85K | -0.55% |
| 2025-12-18 | 29.03 | 29.10 | 28.72 | 29.10 | 39K | +0.14% |
| 2025-12-17 | 28.56 | 29.20 | 28.55 | 29.06 | 116K | +1.47% |
| 2025-12-16 | 28.28 | 28.80 | 28.28 | 28.64 | 43K | +0.17% |
| 2025-12-15 | 28.28 | 28.80 | 28.28 | 28.59 | 68K | +0.85% |
| 2025-12-12 | 28.38 | 28.70 | 28.11 | 28.35 | 76K | +0.43% |
| 2025-12-11 | 28.11 | 28.41 | 28.10 | 28.23 | 33K | +0.43% |
| 2025-12-10 | 27.91 | 28.59 | 27.90 | 28.11 | 61K | -0.11% |
| 2025-12-09 | 27.85 | 28.63 | 27.85 | 28.14 | 46K | +0.79% |
| 2025-12-08 | 28.03 | 28.15 | 27.80 | 27.92 | 41K | +0.52% |
| 2025-12-05 | 27.64 | 27.97 | 27.36 | 27.77 | 48K | +1.11% |
| 2025-12-04 | 27.90 | 28.36 | 27.31 | 27.47 | 71K | -0.47% |
| 2025-12-03 | 27.57 | 27.84 | 27.45 | 27.60 | 19K | +0.29% |
| 2025-12-02 | 27.50 | 27.69 | 27.36 | 27.52 | 30K | +0.33% |
| 2025-12-01 | 27.38 | 27.70 | 27.32 | 27.43 | 65K | 0.00% |
| 2025-11-28 | 27.55 | 27.58 | 27.30 | 27.43 | 34K | -0.40% |
| 2025-11-26 | 27.25 | 27.85 | 27.25 | 27.54 | 47K | +0.47% |
| 2025-11-25 | 27.31 | 27.61 | 27.27 | 27.41 | 50K | +0.07% |
| 2025-11-24 | 27.30 | 27.79 | 27.15 | 27.39 | 108K | +0.33% |
| 2025-11-21 | 27.45 | 27.68 | 27.22 | 27.30 | 117K | -0.76% |
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Start ComparisonMRSN — Frequently Asked Questions
Quick answers to the most common questions about buying MRSN stock.
How has MRSN stock performed recently?
MRSN returned +257.7% over the past year, beating its 5-year annualized CAGR of -40.4%. The stock trades above its 200-day moving average, confirming the uptrend.
What is MRSN's all-time high price?
Mersana Therapeutics, Inc. reached $727.25 on 2020-12-29. The 52-week high is $30.39. Current 1-year return of +257.7% places the stock closer to historical peaks.
Where can I download MRSN historical price data?
This page provides MRSN daily OHLCV data with 50-day MA, 200-day MA, and RSI indicators. Data spans 2017-2026, downloadable in CSV format.