Mersana Therapeutics, Inc.
MRSNNASDAQHealthcare
$29.08
+$0.00(+0.00%)
Market Cap$145363650
P/E Ratio—
52W High$30.39
52W Low$5.21
Mersana Therapeutics, Inc. (MRSN) Stock Price History
Key milestones, OHLCV table, annual returns, peers & What If.
mrsn · EOD price history · split-adj. · FMP · as of Jan 6, 2026
5-Year High5Y
$383.38
Jun 14, 2021
-92.4% from here
5-Year Low5Y
$5.21
Aug 13, 2025
+458.2% from low
IPO Priceadj.
$350.00
Jun 28, 2017
-91.7% since IPO
1 Year Ago
$9.77
Jun 9, 2025
+197.6% in 1Y
5 Years Ago
$367.25
Jun 9, 2021
-92.1% in 5Y
10 Years Ago
—
—
+0.0% in 10Y
Historical Price Data · MRSN
| Date↓ | Open↕ | High↕ | Low↕ | Close↕ | Close (Unadj.) ⓘ | Volume↕ | Change %↕ |
|---|---|---|---|---|---|---|---|
| Jan 6, 2026 | $29.08 | $29.08 | $29.08 | $29.08 | $29.08 | 624K | +0.00% |
| Jan 5, 2026 | $28.90 | $30.39 | $28.78 | $29.08 | $29.08 | 713K | +0.62% |
| Jan 2, 2026 | $29.00 | $29.33 | $28.73 | $29.04 | $29.04 | 104K | +0.14% |
| Dec 31, 2025 | $28.48 | $28.96 | $28.48 | $28.93 | $28.93 | 175K | +1.58% |
| Dec 30, 2025 | $28.56 | $28.98 | $28.11 | $28.65 | $28.65 | 303K | +0.32% |
| Dec 29, 2025 | $28.87 | $29.11 | $28.40 | $28.73 | $28.73 | 150K | -0.48% |
| Dec 26, 2025 | $29.10 | $29.15 | $28.91 | $29.08 | $29.08 | 82K | -0.07% |
| Dec 24, 2025 | $29.01 | $29.14 | $29.00 | $29.10 | $29.10 | 14K | +0.31% |
| Dec 23, 2025 | $28.88 | $29.07 | $28.85 | $29.00 | $29.00 | 61K | +0.42% |
| Dec 22, 2025 | $28.91 | $29.12 | $28.86 | $28.92 | $28.92 | 32K | +0.03% |
| Dec 19, 2025 | $29.29 | $29.39 | $28.84 | $28.94 | $28.94 | 85K | -1.19% |
| Dec 18, 2025 | $29.03 | $29.10 | $28.72 | $29.10 | $29.10 | 39K | +0.24% |
| Dec 17, 2025 | $28.56 | $29.20 | $28.55 | $29.06 | $29.06 | 116K | +1.75% |
| Dec 16, 2025 | $28.43 | $29.12 | $28.38 | $29.05 | $29.05 | 62K | +2.18% |
| Dec 15, 2025 | $28.28 | $28.80 | $28.28 | $28.59 | $28.59 | 68K | +1.10% |
| Dec 12, 2025 | $28.38 | $28.70 | $28.11 | $28.35 | $28.35 | 76K | -0.11% |
| Dec 11, 2025 | $28.11 | $28.41 | $28.10 | $28.23 | $28.23 | 33K | +0.43% |
| Dec 10, 2025 | $27.91 | $28.59 | $27.90 | $28.11 | $28.11 | 61K | +0.72% |
| Dec 9, 2025 | $27.85 | $28.63 | $27.85 | $28.14 | $28.14 | 46K | +1.04% |
| Dec 8, 2025 | $28.03 | $28.15 | $27.80 | $27.92 | $27.92 | 41K | -0.39% |
Showing 1–20 of 1,149 records
Annual Stock Price Performance · MRSN
Jan 1 → Dec 31 · 6 years2026+0.3%$29.00 → $29.08
+0.3%
2025-19.6%$36.00 → $28.93
-19.6%
2024-37.6%$57.25 → $35.75
-37.6%
2023-60.8%$148.00 → $58.00
-60.8%
2022-7.1%$157.75 → $146.50
-7.1%
2021-57.9%$369.00 → $155.50
-57.9%
Best Year2026 · +0.3%
Worst Year2023 · -60.8%
Positive Years1 / 6
Avg Annual Return-30.5%
6Y Total Return-92.1%
6Y CAGR~-34.5% / yr
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If you invested $1,000 in MRSN at IPO (split-adj.) — how much would it be worth today?
INVESTED$1,000
→TODAY WORTH$83
Total Return-91.7%
CAGR~-24.2% / yr
Profit$-917
Based on Jun 28, 2017 · $350.00Split & dividend adjustedNo fees assumed
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About Price History & OHLCV Data
Mersana Therapeutics, Inc. (MRSN) is classified under Healthcare and trades on NASDAQ. The quote snapshot on this page shows a last price of $29.08. Use the chart and OHLCV table below for open, high, low, close and volume over time.
Annual performance bars, similar companies in the same sector, and the What If calculator help you explore long-horizon returns without leaving this tab. Figures use split-adjusted end-of-day prices where noted; this content is informational, not investment advice.
Data: FMP EOD · split-adjusted where noted · not investment advice
Frequently Asked Questions
MRSN price history · 5 questionsEnd-of-day prices are sourced from market data providers (Financial Modeling Prep). Corporate actions such as splits may be reflected in adjusted series; always verify critical values with your broker or official filings.
MRSN historical stock pricesFMP EOD datasplit-adjusted OHLCV