Sifting through countless of stocks in the Biotechnology industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in Ultragenyx Pharmaceutical Inc. or Legend Biotech Corporation because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.

Read on to learn how Ultragenyx Pharmaceutical Inc. and Legend Biotech Corporation compare based on key financial metrics to determine which better meets your investment needs.

About Ultragenyx Pharmaceutical Inc. and Legend Biotech Corporation

Ultragenyx Pharmaceutical Inc., a biopharmaceutical company, focuses on the identification, acquisition, development, and commercialization of novel products for the treatment of rare and ultra-rare genetic diseases in North America, Latin America, Europe, the Middle East, Africa, and the Asia-Pacific. Its biologic products include Crysvita (burosumab), an antibody targeting fibroblast growth factor 23 for the treatment of X-linked hypophosphatemia, as well as tumor-induced osteomalacia; Mepsevii, an enzyme replacement therapy for the treatment of children and adults with Mucopolysaccharidosis VII; Dojolvi for the treatment of long-chain fatty acid oxidation disorders; and Evkeeza (evinacumab) for the treatment of homozygous familial hypercholesterolemia. The company’s products candidates that are in Phase 3 clinical trials include UX143, a human monoclonal antibody for the treatment of osteogenesis imperfecta; UX111, an AAV9 gene therapy product candidate for the treatment of patients with Sanfilippo syndrome type A, or MPS IIIA, a rare lysosomal storage disease; DTX401, an adeno-associated virus 8 (AAV8) gene therapy clinical candidate for the treatment of patients with glycogen storage disease type Ia; DTX301, an AAV8 gene therapy for the treatment of patients with ornithine transcarbamylase; and GTX-102, an antisense oligonucleotide for the treatment of Angelman syndrome. It also develops UX701, an adeno-associated AAV9 gene therapy which is in Phase 2 clinical trial for the treatment of Wilson liver disease. The company has collaboration and license agreement with Kyowa Kirin Co., Ltd.; Saint Louis University; Baylor Research Institute; REGENXBIO Inc.; GeneTx; Mereo; University of Pennsylvania; Regeneron; and Abeona. Ultragenyx Pharmaceutical Inc. was incorporated in 2010 and is headquartered in Novato, California.

Legend Biotech Corporation, through its subsidiaries, operates as a biopharmaceutical company that discovers, develops, manufactures, and commercializes novel cell therapies for oncology and other indications in the United States, China, and Europe. Its lead product candidate is ciltacabtagene autoleucel, or cilta-cel, which is a chimeric antigen receptor (CAR-T) therapy for the treatment of multiple myeloma (MM). The company also has a portfolio of earlier-stage autologous CAR-T product candidates targeting various cancers, including acute lymphoblastic leukemia, gastric cancer, esophageal cancer, pancreatic cancer, colorectal cancer, small cell lung cancer, and non-small cell lung cancer. In addition, it develops allogeneic gamma delta CAR-T and allogeneic CAR-NK product candidates targeting B-cell maturation antigen (BCMA) for MM, which are in investigator-initiated Phase 1 clinical trials in China. The company has a collaboration and license agreement with Janssen Biotech, Inc. for the development and commercialization of cilta-cel, as well as a license agreement with Novartis Pharma AG for the development, manufacture, and commercialization of CAR-T cell therapies targeting delta-like ligand protein 3. Legend Biotech Corporation was founded in 2014 and is headquartered in Somerset, New Jersey.

Latest Biotechnology and Ultragenyx Pharmaceutical Inc., Legend Biotech Corporation Stock News

As of September 4, 2026, Ultragenyx Pharmaceutical Inc. had a $1.5 billion market capitalization, compared to the Biotechnology median of $282.4 million. Ultragenyx Pharmaceutical Inc.’s stock is down 33.5% in 2026, down 40.3% in the previous five trading days and down 51.09% in the past year.

Currently, Ultragenyx Pharmaceutical Inc. does not have a price-earnings ratio. Ultragenyx Pharmaceutical Inc.’s trailing 12-month revenue is $717.0 million with a -81.7% net profit margin. Year-over-year quarterly sales growth most recently was 28.1%. Analysts expect adjusted earnings to reach $-3.874 per share for the current fiscal year. Ultragenyx Pharmaceutical Inc. does not currently pay a dividend.

As of September 4, 2026, Legend Biotech Corporation had a $4.2 billion market cap, putting it in the 64th percentile of all stocks. Legend Biotech Corporation’s stock is down 1% in 2026, up 8.2% in the previous five trading days and down 38.5% in the past year.

Currently, Legend Biotech Corporation does not have a price-earnings ratio. Legend Biotech Corporation’s trailing 12-month revenue is $1.3 billion with a -7.2% net profit margin. Year-over-year quarterly sales growth most recently was 51.9%. Analysts expect adjusted earnings to reach $-0.010 per share for the current fiscal year. Legend Biotech Corporation does not currently pay a dividend.

How We Compare Ultragenyx Pharmaceutical Inc. and Legend Biotech Corporation Stock Grades

Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at Ultragenyx Pharmaceutical Inc. and Legend Biotech Corporation’s stock grades to see how they measure up against one another.

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Ultragenyx Pharmaceutical Inc. and Legend Biotech Corporation’s Quality Grades

Company	Ticker	Quality
Ultragenyx Pharmaceutical Inc.	RARE	F
Legend Biotech Corporation	LEGN	C

Like the Value Grade, AAII’s A+ Investor Quality Grade comes from the percentile rank of key metrics. Specifically, the Quality Score is the percentile rank of the average of the percentile ranks of return on assets (ROA), return on invested capital (ROIC), gross profit relative to assets, buyback yield, change in total liabilities to assets, accruals, Z double prime bankruptcy risk (Z) score and the F-Score.

The score is variable, meaning it can consider all eight measures or, should any of the eight measures not be valid, the remaining measures that are valid. To be assigned a Quality Score, stocks must have a valid (non-null) measure and corresponding ranking for at least four of the eight quality measures.

The Quality Score is used to assess the underlying “quality” of a particular stock. A higher-quality stock possesses traits associated with upside potential and reduced downside risk. Backtesting of the Quality Grade shows that stocks with higher grades, on average, outperformed stocks with lower grades over the period of 1998 through 2019.

Stocks receive better grades (higher scores) for having higher scores for the quality subcomponents and worse grades (lower scores) for lower scores for the subcomponents.

Ultragenyx Pharmaceutical Inc. has a Quality Score of 4, which is Very Weak. Legend Biotech Corporation has a Quality Score of 51, which is Average.

The Quality Stock Winner: No Clear Winner

Neither Ultragenyx Pharmaceutical Inc. or Legend Biotech Corporation has a high enough Quality Grade to be considered a “winner.” Investors who are considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if Ultragenyx Pharmaceutical Inc. or Legend Biotech Corporation is the better investment when it comes to quality.

Ultragenyx Pharmaceutical Inc. and Legend Biotech Corporation’s Momentum Grades

Company	Ticker	Momentum
Ultragenyx Pharmaceutical Inc.	RARE	F
Legend Biotech Corporation	LEGN	F

Momentum grades help to uncover stocks experiencing anomalously high rates of return; research finds that stocks with high relative levels of momentum tend to outperform, whereas those with low levels of momentum tend to continue underperforming. Momentum is based on the price change of a stock over a specified period relative to all other stocks.

Typically, AAII looks at the weighted relative strength over the trailing four quarters. The weighted four-quarter relative strength rank is the relative price change for each of the past four quarters. The most recent quarterly price change is given a weight of 40% and each of the three previous quarters are given a weighting of 20%.

Ultragenyx Pharmaceutical Inc. has a Momentum Score of 10, which is Very Weak. Legend Biotech Corporation has a Momentum Score of 16, which is Very Weak.

The Momentum Stock Winner: No Clear Winner

Neither Ultragenyx Pharmaceutical Inc. or Legend Biotech Corporation has a strong enough Momentum Grade to be considered a “winner.” Investors considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if Ultragenyx Pharmaceutical Inc. or Legend Biotech Corporation is the better investment when it comes to momentum.

Ultragenyx Pharmaceutical Inc. and Legend Biotech Corporation’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Ultragenyx Pharmaceutical Inc.	RARE	C
Legend Biotech Corporation	LEGN	F

Earnings estimate revisions scores consider the magnitude of a company’s earnings surprise in its last two reported fiscal quarters. Often, positive surprises beget further positive surprises‐or at least continued sales growth (the exact opposite is generally true, too).

Estimate revisions offer an indication of what analysts are thinking about the short-term prospects of a firm. Estimate revisions are based on the statistical significance of a firm’s last two quarterly earnings surprises and the percentage change in its consensus estimate for the current fiscal year over the past month and past three months.

Ultragenyx Pharmaceutical Inc. has a Earnings Estimate Score of 56, which is Neutral. Legend Biotech Corporation has a Earnings Estimate Score of 3, which is Very Negative.

The Earnings Estimate Revisions Stock Winner: No Clear Winner

Neither Ultragenyx Pharmaceutical Inc. or Legend Biotech Corporation has an Earnings Estimate Revisions Grade that could be considered a “winner.” Investors considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if Ultragenyx Pharmaceutical Inc. or Legend Biotech Corporation is the better investment when it comes to estimate revisions.

Other Ultragenyx Pharmaceutical Inc. and Legend Biotech Corporation Grades

In addition to Quality, Momentum and Estimate Revisions, A+ Investor also provides grades for Value and Growth.

Growth investing builds on the idea that stocks of companies exhibiting strong, consistent and prolonged growth outperform those of slower-growth companies. AAII measures growth through consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations.

Successful stock investing involves buying low and selling high, so stock valuation is an important consideration for stock selection. Buying stocks that are going to go up typically means buying stocks that are undervalued in the first place, although momentum investors may argue that point.

These 2 key factors, when combined with the above, provide a holistic view into a particular stock. Further, by joining A+ Investor you can see whether Ultragenyx Pharmaceutical Inc. and Legend Biotech Corporation pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Ultragenyx Pharmaceutical Inc. or Legend Biotech Corporation Stock?

Overall, Ultragenyx Pharmaceutical Inc. stock has a Momentum Score of 10, Estimate Revisions Score of 56 and Quality Score of 4.

Legend Biotech Corporation stock has a Momentum Score of 16, Estimate Revisions Score of 3 and Quality Score of 51.

Comparing Ultragenyx Pharmaceutical Inc. and Legend Biotech Corporation’s grades, scores and metrics can act as a solid basis to determine whether they may be a good investment or not. You’ll also want to look at your portfolio’s asset allocation as well as your risk tolerance and financial goals to see if either of these stocks would make a good fit for you. AAII can help you figure out which investments align with your individual needs and preferences.

Investors are encouraged to do their own due diligence and research. In this way, individuals can effectively become managers of their own assets‐without having to rely on others for financial independence. You can count on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis.

A+ Investor adds to our qualitative teaching with a powerful data suite to help you whittle down investment choices to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith, and we accept no liability for any errors or omissions. The full disclaimer can be read here.