Biggest stock movers Tuesday: SAVA, CLSK, and more

[Abstract Finance Technology Concept]
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Stock futures inched higher Tuesday premarket as major U.S. indexes hit record highs; investors await Fed Chair Powell’s speech.

Here are some of Tuesday's biggest stock movers:

BIGGEST STOCK GAINERS

* CASSAVA SCIENCES (NASDAQ:SAVA [https://seekingalpha.com/symbol/SAVA]) +28% - Shares jumped after a significant investment from the company's leadership. President & CEO Richard Barry bought 237,941 shares valued at $534,743, signaling strong confidence in the company’s future.
* PDF SOLUTIONS (NASDAQ:PDFS [https://seekingalpha.com/symbol/PDFS]) +12% – Shares surged after signing a multi-year contract with a major global semiconductor manufacturer, expanding deployment of eProbe®, Characterization Vehicle®, and Exensio® tools. The company also reaffirmed FY2025 revenue growth guidance at 21–23% Y/Y.
* CleanSpark (NASDAQ:CLSK [https://seekingalpha.com/symbol/CLSK]) +5% - Shares rose after expanding its bitcoin-backed credit facility with Coinbase Prime by $100M, aimed at growing its energy portfolio, scaling bitcoin mining, and investing in high-performance computing. CEO Schultz highlights opportunities to accelerate mining and optimize key assets.

BIGGEST STOCK LOSERS

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FIREFLY AEROSPACE (NASDAQ:FLY [https://seekingalpha.com/symbol/FLY]) -12% – Shares plunge after Q2 results miss expectations, with revenue down 26.2% Y/Y and net loss per share widening to $5.78 from $4.60. The company projects 2025 full-year revenue of $133M–$145M (midpoint $139M), roughly in line with the consensus of $138.47M.

MORE ON RELATED STOCKS:

* Firefly Aerospace: The Space Stock You Should Not Buy [https://seekingalpha.com/article/4814161-firefly-aerospace-the-space-stock-you-should-not-buy]
* PDF Solutions: Semi Play Posting Semi Margins [https://seekingalpha.com/article/4813512-pdf-solutions-semi-play-posting-semi-margins]
* PDF Solutions, Inc. (PDFS) Q2 2025 Earnings Call Transcript [https://seekingalpha.com/article/4811835-pdf-solutions-inc-pdfs-q2-2025-earnings-call-transcript]
* PDF Solutions stock rises as it expands services with global semiconductor giant in multi-year deal [https://seekingalpha.com/news/4497501-pdf-solutions-expands-services-with-global-semiconductor-giant-in-multi-year-deal]
* CleanSpark expands capital with additional $100M bitcoin-backed credit [https://seekingalpha.com/news/4497464-cleanspark-expands-capital-with-additional-100m-bitcoin-backed-credit]