Mersana Therapeutics, Inc. (MRSN) Stock Price History
Historical prices from 2017 to 2026
- 1M
- —
- 3M
- —
- YTD
- +0.1%
- 1Y
- +226.7%
- 3Y
- -30.3%
- 5Y
- -39.0%
Loading 10-year price history...
MRSN Historical Performance
MRSN Annual Returns
Year-by-year price performance · 2017–2026
- 2017 annual price return
- +17.4%
- 2018 annual price return
- -76.5%
- 2019 annual price return
- +32.9%
- 2020 annual price return
- +396.5%
- 2021 annual price return
- -76.5%
- 2022 annual price return
- -9.0%
- 2023 annual price return
- -59.5%
- 2024 annual price return
- -37.0%
- 2025 annual price return
- -17.3%
- 2026 annual price return
- +0.1%
MRSN Stock Price Trajectory (2017–2026)
As of June 22, 2026, Mersana Therapeutics, Inc. (MRSN) trades at $29.08, representing a +226.7% return over the past year. The stock has delivered a -91.5% total return over five years (-39.0% 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 (+185.7% 1Y), SNDX (+96.1% 1Y), and AGEN (-32.9% 1Y), MRSN has underperformed the peer group average. Compare MRSN vs RCUS →
MRSN Historical Price Data · from 2017
Rows 1–50 of 2,143| 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% |
| 2025-11-20 | 27.89 | 28.00 | 27.26 | 27.51 | 121K | -0.36% |
| 2025-11-19 | 27.61 | 27.95 | 27.42 | 27.61 | 89K | +0.25% |
| 2025-11-18 | 27.70 | 27.99 | 27.50 | 27.54 | 78K | -0.65% |
| 2025-11-17 | 27.60 | 28.05 | 27.54 | 27.72 | 157K | -0.72% |
| 2025-11-14 | 27.21 | 28.12 | 27.11 | 27.92 | 420K | +1.79% |
| 2025-11-13 | 27.68 | 28.07 | 26.55 | 27.43 | 3.16M | +209.24% |
| 2025-11-12 | 8.70 | 8.88 | 8.45 | 8.87 | 22K | -0.45% |
| 2025-11-11 | 8.61 | 8.91 | 8.35 | 8.91 | 27K | +3.48% |
| 2025-11-10 | 8.50 | 8.71 | 8.26 | 8.61 | 39K | +2.38% |
| 2025-11-07 | 8.00 | 8.43 | 7.54 | 8.41 | 34K | +4.60% |
| 2025-11-06 | 8.43 | 8.87 | 8.00 | 8.04 | 33K | -4.96% |
| 2025-11-05 | 8.23 | 8.65 | 8.15 | 8.46 | 31K | +3.68% |
| 2025-11-04 | 9.15 | 9.15 | 8.00 | 8.16 | 62K | -13.56% |
| 2025-11-03 | 9.54 | 9.59 | 8.96 | 9.44 | 42K | -1.46% |
| 2025-10-31 | 9.30 | 9.87 | 9.24 | 9.58 | 35K | +3.01% |
| 2025-10-30 | 9.49 | 9.61 | 9.24 | 9.30 | 26K | -2.72% |
| 2025-10-29 | 9.95 | 10.03 | 9.54 | 9.56 | 29K | -6.55% |
| 2025-10-28 | 10.53 | 10.60 | 10.10 | 10.23 | 35K | -3.40% |
| 2025-10-27 | 9.90 | 10.64 | 9.87 | 10.59 | 55K | +8.28% |
| 2025-10-24 | 9.82 | 9.94 | 9.50 | 9.78 | 31K | -0.41% |
Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
10-year return with dividends reinvested.
DCA Calculator
See how regular investing compounds over time.
Peer Comparison
Compare growth, multiples, and margins vs sector.
MRSN — Frequently Asked Questions
Quick answers to the most common questions about buying MRSN stock.
How has MRSN stock performed recently?
MRSN returned +226.7% over the past year, beating its 5-year annualized CAGR of -39.0%. 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 +226.7% 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.