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Sutro Biopharma, Inc. (STRO) Stock Analysis

Healthcare

Sutro Biopharma, Inc.

$27.38

+$1.81 (+7.08%)

Last Updated: May 26, 2026

Price History

Analysis

Company Overview

Sutro Biopharma, Inc. operates within the healthcare sector as a specialized biotechnology company focused on oncology. The firm develops site-specific and novel-format antibody drug conjugates (ADCs) that enable its proprietary integrated cell-free protein synthesis platform, XpressCF, as well as its site-specific conjugation platform, XpressCF+. As of the latest data, the company holds a market capitalization of $386.56M, which reflects its valuation as a mid-sized entity in the biotechnology landscape. Despite the absence of specific employee count data in current filings, the company has generated annual revenue of $102.48M over the trailing twelve months. This market capitalization and revenue profile indicate that Sutro Biopharma is an established but still developing player, likely reliant on future clinical success to expand its scale and reduce its dependence on external capital markets.

Financial Health

The company reported revenue of $102.48M for the trailing twelve months, yet it simultaneously recorded a net income of $-191,086,000 and an EBITDA of $-97,628,000. The substantial gap between the positive revenue figure and the significantly negative net income reveals a cost structure characterized by high operating expenses that far exceed current sales, a common trait in early-stage biotechnology firms. Free cash flow stands at $-123,992,000, indicating that the company is currently burning cash rather than generating liquidity from its operations. This negative cash flow implies limited financial flexibility for discretionary spending, necessitating ongoing access to capital markets or existing reserves to fund research and development activities. Gross margin is reported at 100.0%, while operating margin sits at -289.0% and profit margin at -186.5%. The 100.0% gross margin suggests that the cost of goods sold is effectively zero relative to revenue, yet the deeply negative operating and profit margins confirm that selling, general, and administrative costs are overwhelming any gross profit generation. Total cash on hand is $141.43M compared to total debt of $15.67M, creating a net cash position, although the debt-to-equity ratio is listed as N/A. While the debt level is low relative to cash, the negative equity implied by the P/E and price-to-book metrics suggests the balance sheet is structured around equity dilution rather than leverage. The current ratio is 2.01, which indicates a strong ability to meet short-term obligations with its liquid assets. Return on equity is N/A, while return on assets is -23.4%, revealing that the asset base is currently generating negative returns due to the heavy investment in development without corresponding commercial earnings.

Valuation Assessment

The trailing P/E ratio is N/A due to negative earnings, whereas the forward P/E is -58.74, a metric that is often used cautiously for loss-making companies. The difference between these metrics implies that the market is pricing in significant uncertainty regarding the trajectory of future earnings, as the forward multiple remains negative. The price-to-book ratio is -1.52, which indicates that the company is trading below its book value, a situation typical for firms where intangible assets like intellectual property are not fully captured on the balance sheet or where market sentiment is cautious. Additionally, the price-to-sales ratio is 3.77 and the EV/EBITDA is -0.78, suggesting that valuation is being driven primarily by revenue potential and sales growth prospects rather than current profitability or cash generation. The stock has traded between a 52-week high of $26.54 and a 52-week low of $5.20. The current price sits significantly below the 52-week high, reflecting a substantial correction from recent peaks, while the low point establishes a floor where the stock has found support over the last year. Beta is listed as N/A, meaning there is insufficient data to quantify the stock's volatility relative to the broader market, though the wide trading range between $5.20 and $26.54 suggests inherent high volatility typical of small-cap biotechnology stocks.

Growth & Income

Revenue growth year-over-year is -21.4%, while earnings growth is N/A due to the company's negative earnings position. The decline in revenue indicates a contraction in sales, which combined with negative earnings, implies that the company is currently in a phase where commercial performance is insufficient to cover its development and operational expenditures. Since the company does not pay dividends, the dividend yield is N/A and the payout ratio is 0.0%. This lack of dividend distribution means the company reinvests all available earnings or capital back into growth initiatives, such as advancing its lead products through clinical trials, rather than returning value to shareholders in the form of cash payouts. The overall growth and income profile presents a scenario of revenue contraction and negative earnings, where the primary value proposition relies entirely on the potential future success of its oncology pipeline rather than current profitability or income generation.

Peer Comparison

Sutro Biopharma, Inc. (STRO) operates in the Biotechnology industry. Here is how it compares to its closest peers by market capitalization:

Company Ticker Market Cap P/E Ratio
Sutro Biopharma, Inc. STRO $453.70M N/A
Vertex Pharmaceuticals Incorporated VRTX $110.64B 25.8
Regeneron Pharmaceuticals, Inc. REGN $66.98B 15.6
argenx SE ARGX $50.52B 36.0

The Biotechnology industry average P/E ratio is 53.8x. Sutro Biopharma, Inc. trades at a P/E of N/A.

This analysis is AI-generated for informational purposes only and should not be considered financial advice. Data may be delayed or inaccurate. Always do your own research and consult a qualified financial advisor before making investment decisions.

About Sutro Biopharma, Inc.

Sutro Biopharma, Inc. operates as an oncology company. The company develops site-specific and novel-format antibody drug conjugates (ADCs) that enables its proprietary integrated cell-free protein synthesis platform, XpressCF; and site-specific conjugation platform, XpressCF+. Its lead product candidate includes STRO-004, a tissue factor (TF) targeting ADC for the treatment of TF-expressing solid tumors, including non-small cell lung cancer, head and neck squamous cell carcinoma, cervical cancer, colorectal cancer, pancreatic ductal adenocarcinoma, endometrial cancer, and bladder cancer. The company also develops VAX-24 and Vax-31 pneumococcal conjugate vaccine candidates that is in Phase II/III clinical trials for the treatment of invasive pneumococcal disease in adults and adults and infants; and STRO-003, an ADC directed against an anti-receptor tyrosine kinase-like orphan receptor 1 (ROR1) for the treatment of solid tumors, such as triple negative breast cancer, non-small cell lung cancer, and ovarian cancer, as well as hematological cancers. Sutro Biopharma, Inc. has collaboration and license agreements with Vaxcyte to discover and develop vaccine candidates for the treatment or prophylaxis of infectious diseases; Tasly Biopharmaceuticals Co., Ltd. to develop and commercialize STRO-002 in Greater China; Ipsen to develop and commercialize STRO-003, an ADC targeting ROR1; and Astellas Pharma Inc. to develop immunostimulatory ADC. The company was formerly known as Fundamental Applied Biology, Inc. Sutro Biopharma, Inc. was incorporated in 2003 and is headquartered in South San Francisco, California.

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Key Statistics

Market Cap
$453.70M
P/E Ratio
N/A
52-Week High
$43.85
52-Week Low
$6.70
Avg Volume
252.35K

Data provided by Yahoo Finance via yfinance. Updated daily.

Company Info

Exchange
NASDAQ
Country
United States
Employees
137