Lyell Immunopharma Inc (LYEL) fair value: what the stock is really worth
As of Sep 23, 2026: fair value of Lyell Immunopharma Inc $5.87, price $10.53, upside -44.3%, quality 19 out of 100. Calculated from audited financials with 26 valuation models and 37 quality factors, updated daily.
- Fair value above price? No
- Good quality? No
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Lyell Immunopharma Inc
LYEL · USWeakest SetupStrongly overvalued and low quality.
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Price vs Fair Value
White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Sep 25, 2026.
How to read this chart
60‑month range $7.80 – $359.00 · fair‑value band $3.87 – $7.34 · the $10.53 price screens above the $5.87 fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). Dashed = 300-day average. As of Sep 25, 2026.
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Company profile
Lyell Immunopharma, Inc., a clinical-stage cell therapy company, develops chimeric antigen receptor (CAR) T-cell product candidates for patients with hematologic malignancies and solid tumors.
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Lyell Immunopharma, Inc., a clinical-stage cell therapy company, develops chimeric antigen receptor (CAR) T-cell product candidates for patients with hematologic malignancies and solid tumors. The company's lead product candidate include rondecabtagene autoleucel, an autologous dual-targeting CD19/CD20 CAR T-cell therapy in development, which is in pivotal PiNACLE trial in the 3L+ setting and in a Phase 1/2 clinical trial in the 2L setting, as well as a second pivotal trial, PiNACLE-H2H, which is a Phase 3 head-to-head CAR T cell therapy randomized controlled trial of ronde-cel for LBCL in the 2L setting for the treatment of large B-cell lymphoma; and LYL273, a GCC-targeted CAR T-cell product candidate enhanced with CD19 CAR expression and controlled cytokine release designed to improve CAR T-cell expansion, immune cell infiltration, and cancer cell killing in the hostile solid tumor microenvironment, which is in Phase 1 clinical trial for the treatment of refractory metastatic colorectal cancer. The company develops therapies using various approaches, such as c-Jun overexpression and NR4A3 gene knockout, to endow functional resistance to exhaustion; Epi-R to generate population of stem-like T cells with reduced exhaustion and improved proliferation and antitumor activity; and CD62L positive enrichment to generate CAR T cells with enhanced antitumor activity. Lyell Immunopharma, Inc. was incorporated in 2018 and is headquartered in South San Francisco, California.
Stock analysis
Lyell Immunopharma Inc (LYEL) currently trades at $10.53, while our model-based Fair Value estimate is $5.87, implying the stock looks roughly 79.5% overvalued today.
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Valuation
How firm this estimate is: it rests on 1 models at a data quality of 96/100, which puts the evidence level at low.
Scenario range: $3.87 (bear) to $7.34 (bull), the price of $10.53 sits above it. Bear and bull are the same models on cautious and optimistic assumptions, a range, not a price target.
Quality & growth
The Quality Score stands at 19/100 (below-average quality), in the Healthcare sector.
Weak Growth: Revenue is shrinking: the last year, the last three and the last five years are all negative.
Lyell Immunopharma Inc reported revenue of $36.0K in FY2025 versus $10.7M in FY2021, a compound −75.9%/yr. Reported net income was −$274M in FY2025.
Key figures
Market cap $246M · EPS (TTM) $−12.54 · Return on equity −93.3% · Return on assets (EBIT) −41.0% · Operating margin −1,183,425% · Revenue (TTM) $27.0K · Revenue growth (YoY) −50.0% · Free cash flow −$151M.
Competitive moat
Our AI-assisted moat analysis scores the competitive advantage at 28 out of 100 (low confidence).
What moves the price
The share trades about 73% below its 52-week high and at its 52-week low, currently below its 200-day average.
For context, the median of 10 Healthcare peers we cover trades at −5% fair-value upside, at −44%, LYEL screens richer than that median.
Fair Value models
All 1 models by family
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Set up alert →Quality Score breakdown
Of which business quality 22 · Market factors (momentum, volatility) 26
Revenue & earnings trend
LYEL screens 80% overvalued. Compare with Vertex Pharmaceuticals Incorporated →
Compare Lyell Immunopharma Inc with another stock
Price, fair value, quality and upside side by side.
Peer GroupⓘHow this stock ranks against its industry: the green marker is this stock, the band is the typical 25–75% peer range, and the tick is the median.Biotechnology · 650 stocks
Valuation Multiplesvs Biotechnology median · lower = cheaper
Context: sector, industry, market
- Is the Health Care sector expensive or cheap?
- P/E, EV/EBITDA and margins by industry (reference tables)
- Undervalued stocks: US Stocks
- Valuation of the USA market
Values & ESG
Does this company touch areas you may want to avoid? The classification is inferred from sector and industry.
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| Vertex Pharmaceuticals Incorporated VRTX | $516.34 | $567.97 | +10% |
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| Samsung Biologics Co 207940 | 1,366,000 KRW | 1,502,600 KRW | +10% |
| CSL Limited CSL | A$179.12 | A$197.03 | +10% |
| Alnylam Pharmaceuticals, Inc ALNY | $251.65 | $218.36 | −13% |
| Royalty Pharma plc RPRX | $58.52 | $24.22 | −59% |
| BeOne Medicines AG 6160 | HK$218.20 | HK$169.72 | −22% |
| Celltrion, Inc 068270 | 177,400 KRW | 74,519 KRW | −58% |
| BioNTech SE BNTX | $100.87 | $63.62 | −37% |
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Key figures of Lyell Immunopharma Inc
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