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 PTC Therapeutics, Inc., Viridian Therapeutics or Inc. 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 PTC Therapeutics, Inc., Viridian Therapeutics and Inc. compare based on key financial metrics to determine which better meets your investment needs.

About PTC Therapeutics, Inc., Viridian Therapeutics and Inc.

PTC Therapeutics, Inc., a biopharmaceutical company, focuses on the discovery, development, and commercialization of medicines to children and adults living with rare disorders in the United States and internationally. The company offers Translarna and Emflaza for the treatment of Duchenne muscular dystrophy; Upstaza to treat aromatic l-amino acid decarboxylas (AADC) deficiency, a central nervous system disorder; Tegsedi and Waylivra for the treatment of rare diseases; and Evrysdi to treat spinal muscular atrophy (SMA) in adults and children. Its development pipeline products include Sepiapterin for the treatment of phenylketonuria; PTC518 splicing platform, which is being developed for the treatment of Huntington’s disease; and inflammation and ferroptosis platforms, including vatiquinone to treat Friedreich’s ataxia. The company distributes its products through third-party distributors. It has collaborations with F. Hoffman-La Roche Ltd., Hoffman-La Roche Inc., the SMA Foundation, National Taiwan University, Akcea Therapeutics, Inc., and Shiratori Pharmaceutical Co., Ltd. The company has license and collaboration agreement with Novartis Pharmaceuticals Corporation to develop PTC518 Huntington's disease program. It markets Upstaza, a gene therapy with the brand name Kebilidi in the United States. PTC Therapeutics, Inc. was incorporated in 1998 and is headquartered in Warren, New Jersey.

Viridian Therapeutics, Inc. engages in discovering, developing, and commercializing treatments for serious and rare diseases. The company’s product pipeline includes veligrotug, a monoclonal antibody targeting insulin-like growth factor-1 receptor that is in Phase 3 clinical trial for the treatment of thyroid eye disease (TED); and VRDN-003, a next generation IGF-1R monoclonal antibodies targeting IGF-1R and engineered of half-life extension technology, which is in Phase 3 clinical trial for the treatment of TED. It also develops portfolio of engineered anti-neonatal Fc receptor inhibitors, such as VRDN-006 and VRDN-008 for autoimmune disease. The company was formerly known as Miragen Therapeutics, Inc. and changed its name to Viridian Therapeutics, Inc. in January 2021.Viridian Therapeutics, Inc. was founded in 2010 and is headquartered in Waltham, Massachusetts.

Latest Biotechnology and PTC Therapeutics, Inc., Viridian Therapeutics, Inc. Stock News

As of November 26, 2025, PTC Therapeutics, Inc. had a $6.9 billion market capitalization, compared to the Biotechnology median of $217.8 million. PTC Therapeutics, Inc.’s stock is up 90.5% in 2025, up 12.5% in the previous five trading days and up 99.51% in the past year.

Currently, PTC Therapeutics, Inc.’s price-earnings ratio is 9.6. PTC Therapeutics, Inc.’s trailing 12-month revenue is $1.8 billion with a 42.3% net profit margin. Year-over-year quarterly sales growth most recently was 7.2%. Analysts expect adjusted earnings to reach $8.795 per share for the current fiscal year. PTC Therapeutics, Inc. does not currently pay a dividend.

As of November 26, 2025, Viridian Therapeutics, Inc. had a $3.0 billion market cap, putting it in the 62nd percentile of all stocks. Viridian Therapeutics, Inc.’s stock is up 66.7% in 2025, up 8.4% in the previous five trading days and up 57.03% in the past year.

Currently, Viridian Therapeutics, Inc. does not have a price-earnings ratio. Viridian Therapeutics, Inc.’s trailing 12-month revenue is $70.8 million with a -426.6% net profit margin. As of November 26, 2025, Viridian Therapeutics, Inc. has not reported significant year-over-year quarterly sales. Analysts expect adjusted earnings to reach $-3.532 per share for the current fiscal year. Viridian Therapeutics, Inc. does not currently pay a dividend.

How We Compare PTC Therapeutics, Inc., Viridian Therapeutics and Inc. 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 PTC Therapeutics, Inc., Viridian Therapeutics and Inc.’s stock grades to see how they measure up against one another.

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PTC Therapeutics, Inc., Viridian Therapeutics and Inc. Stock Value Grades

Company	Ticker	Value
PTC Therapeutics, Inc.	PTCT	B
Viridian Therapeutics, Inc.	VRDN	F

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.

AAII’s A+ Investor Value Grade derives from a stock’s value score. The Value Score is the percentile rank of the average of the percentile ranks of the price-to-sales ratio, price-earnings ratio, enterprise-value-to-EBITDA (EV/EBITDA) ratio, shareholder yield, price-to-book-value ratio and price-to-free-cash-flow ratio. The score is variable, meaning it can consider all six ratios or, should any of the six ratios not be valid, the remaining ratios that are valid. To be assigned a Value Score, stocks must have a valid (non-null) ratio and corresponding ranking for at least two of the six valuation ratios.

Stocks with a Value Score from 81 to 100 are considered deep value, those with a score between 61 and 80 are a good value and so on.

PTC Therapeutics, Inc. has a Value Score of 71, which is Value. Viridian Therapeutics, Inc. has a Value Score of 2, which is Ultra Expensive.

The Value Stock Winner: PTC Therapeutics, Inc.

As you can clearly see from the Value Grade breakdown above, PTC Therapeutics, Inc. is considered to have better value than Viridian Therapeutics, Inc.. For investors who focus solely on a company’s valuation, PTC Therapeutics, Inc. could be a good stock to add to their portfolio. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

PTC Therapeutics, Inc., Viridian Therapeutics and Inc.’s Momentum Grades

Company	Ticker	Momentum
PTC Therapeutics, Inc.	PTCT	A
Viridian Therapeutics, Inc.	VRDN	A

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%.

PTC Therapeutics, Inc. has a Momentum Score of 94, which is Very Strong. Viridian Therapeutics, Inc. has a Momentum Score of 92, which is Very Strong.

The Momentum Grade Winner: It’s a Tie!

Looking at the Momentum Grade breakdown above, both PTC Therapeutics, Inc., Viridian Therapeutics and Inc. have a grade of A. For those who focus solely on a company’s momentum, further research will need to be conducted into both companies to see if they fit your individual needs as an investor.

PTC Therapeutics, Inc., Viridian Therapeutics and Inc.’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
PTC Therapeutics, Inc.	PTCT	B
Viridian Therapeutics, Inc.	VRDN	B

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.

PTC Therapeutics, Inc. has a Earnings Estimate Score of 80, which is Positive. Viridian Therapeutics, Inc. has a Earnings Estimate Score of 64, which is Positive.

The Earnings Estimate Revisions Grade Winner: It’s a Tie!

Looking at the Earnings Estimate Revisions Grade breakdown above, both PTC Therapeutics, Inc., Viridian Therapeutics and Inc. have a grade of B. For those focusing solely on a company’s estimate revisions, other financial metrics will need to be evaluated to determine whether PTC Therapeutics, Inc., Viridian Therapeutics or Inc. is a better fit.

Other PTC Therapeutics, Inc., Viridian Therapeutics and Inc. Grades

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

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.

AAII’s A+ Investor Quality Grade comes from the ranking of key metrics. Specifically, the quality grade is the percentile rank of the composite 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 F-Score.

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 PTC Therapeutics, Inc., Viridian Therapeutics and Inc. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, PTC Therapeutics, Inc., Viridian Therapeutics or Inc. Stock?

Overall, PTC Therapeutics, Inc. stock has a Value Score of 71, Momentum Score of 94 and Estimate Revisions Score of 80.

Viridian Therapeutics, Inc. stock has a Value Score of 2, Momentum Score of 92 and Estimate Revisions Score of 64.

Comparing PTC Therapeutics, Inc., Viridian Therapeutics and Inc.’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.