Ten stocks kicked off the shortened trading week, clocking eye-popping double-digit gains, thanks to developments in their respective industries that boosted investor buying appetite.

Meanwhile, Wall Street’s three major indices finished mixed, with the Dow Jones the sole loser, down 0.23 percent. The S&P 500 and the Nasdaq increased by 0.61 percent and 1.19 percent, respectively.

In this article, we focus on the 10 top-performing names on Tuesday and break down the reasons behind their gains.

To come up with the list, we considered the stocks with a market capitalization of $2 billion and 5 million shares in trading volume.

10. SolarEdge Technologies Inc. (NASDAQ:SEDG)

SolarEdge Technologies rallied to a new two-year high on Tuesday, as investors continued to load up portfolios amid a short-term boost expected to come from the upcoming deadline for solar tax incentives.

During the session, shares of SolarEdge Technologies Inc. (NASDAQ:SEDG) climbed to a record high of $75.73 before trimming gains to end the session just up by 14.21 percent at $70.75 apiece.

The company rallied alongside its counterparts, namely First Solar and Enphase Energy, among others, as investors expected a pickup in second-quarter performance for solar players given the July 4 deadline for businesses to qualify for a 30-percent federal tax incentive.

Under the new rules of the One Big Beautiful Bill Act, commercial and utility-scale solar projects must begin construction on or before July 4 to remain eligible for a 30-percent investment tax credit, providing a short-term boost to key solar players, including SolarEdge Technologies Inc. (NASDAQ:SEDG), on the expectation that customers would scramble to get their solar projects done to remain qualified for the incentives.

In other news, SolarEdge Technologies Inc. (NASDAQ:SEDG) is set to welcome Maoz Sigron as its new chief finance officer effective Sunday, May 31. He will replace Asaf Alperovitz, who is stepping down to pursue another professional opportunity outside of the industry.

9. Ouster Inc. (NASDAQ:OUST)

Ouster Inc. rallied to a new four-year high on Tuesday, as investors took heart from its partnership with a German technology company for the advancement of the latter’s unmanned aircraft system using its digital lidar products.

In intra-day trading, Ouster Inc. (NASDAQ:OUST) jumped to its highest price of $45.40 before trimming gains to end the session just up by 15.31 percent at $42.70 apiece.

In an updated report on Monday, Ouster Inc. (NASDAQ:OUST) said that it was tapped by Argus Interception GmbH for the incorporation of its digital lidar directly into A1-Falke, a net-based interceptor designed to capture, recover, and secure uncooperative drones. It is expected to optimize the precision and reliability of the net-based intercept process, especially in the decisive near-range phase.

As part of the collaboration, Argus will also explore next-generation interception capabilities with Ouster Inc.’s (NASDAQ:OUST) new Rev8 digital lidar, such as 3D native color sensing and longer-range detection for high-speed applications to bring human-like sight and unmatched situational awareness to automated counter-UAS.

“As rogue drones present increasingly sophisticated threats to critical infrastructure and public safety, precise situational awareness at close range is paramount. By supplying our digital lidar for integration into the A1-Falke, we are providing the high-resolution, low-latency 3D perception required for advanced counter-UAS operations,” Ouster Inc. (NASDAQ:OUST) Chief Revenue Officer Cyrille Jacquemet said.

8. United Microelectronics Corp. (NYSE:UMC)

United Microelectronics bounced back on Tuesday to hit a new all-time high, as investors took heart from its ongoing expansion plan supported by the acquisition of several assets.

In intra-day trading, United Microelectronics Corp. (NYSE:UMC) climbed to its highest price of $21.51 before paring gains to finish the session just up by 15.70 percent at $21.08 apiece.

In a regulatory filing on the Taiwan Stock Exchange, United Microelectronics Corp. (NYSE:UMC) said that it acquired NT$1.03 billion ($31.9 million) of machinery and equipment from Japan-based Tokyo Electron in line with plans to expand its manufacturing capabilities.

Additionally, the rally can also be attributed to portfolio-positioning ahead of its participation in the Asia AI Summit 2026 by Morgan Stanley on May 29, as well as Citi’s 2026 Taiwan Tech Conference on June 5.

Investors are expected to watch for United Microelectronics Corp.’s (NYSE:UMC) updates and outlook for its business.

In other news, United Microelectronics Corp. (NYSE:UMC) earlier this month unveiled a new technology platform for display driver ICs designed to boost power efficiency and performance while reducing chip size.

Called the 14nm eHV FinFET, the platform is capable of reducing power consumption by 40 percent and chip area by 35 percent, enabling longer battery life and thinner driver modules for premium smartphone models.

7. Xanadu Quantum Technologies Ltd. (NASDAQ:XNDU)

Xanadu Quantum climbed by 17.52 percent on Tuesday to finish at $17.84 apiece, as investors resumed buying positions to increase their exposure in the quantum computing sector, having earned the backing of the US government.

Last week, the US Department of Commerce made a $2-billion investment in nine companies, including seven in the quantum computing space and two in the semiconductor sector, in a bid to boost the country’s leadership in these industries.

While originally a Canada-based firm, optimism spilled over to shares of Xanadu Quantum Technologies Ltd. (NASDAQ:XNDU) amid renewed confidence in the looming commercialization of potential quantum technologies, particularly as the US government pushes to accelerate the development of quantum hardware to help solve some of the world’s pressing problems.

It can be recalled that the sector previously faced a wave of skepticism from tech leaders Jensen Huang and Mark Zuckerberg, who deemed that the sector’s practical use may still be years, if not decades, away from meaningful deployment.

That aside, Xanadu Quantum Technologies Ltd. (NASDAQ:XNDU) last week announced a breakthrough in Quantum Read-Only Memory (QROM), a vital component for executing advanced quantum applications, which is expected to lower the cost of quantum applications.

According to Xanadu Quantum Technologies Ltd. (NASDAQ:XNDU), the innovation specifically targets reducing the number of Toffoli gates by half, being one of the most computationally expensive operations a quantum computer can perform.

6. Firefly Aerospace Inc. (NASDAQ:FLY)

Firefly Aerospace saw its share prices jump by 18.81 percent on Tuesday to finish at $58.81 apiece, as investors cheered its bagging of a new $75-million contract from the National Aeronautics and Space Administration (NASA) for its ambitious moon exploration.

In a statement on Tuesday, Firefly Aerospace Inc. (NASDAQ:FLY) said that it was awarded a subcontract for the delivery of four drones to the Moon’s south pole in support of the agency’s MoonFall mission targeted for launch in 2028.

MoonFall is part of the first phase of NASA’s Moon Base, a long-term lunar exploration and infrastructure initiative designed to enable sustained human presence and expanded scientific and commercial activity at the lunar south pole.

NASA’s Jet Propulsion Laboratory is building the drones and managing the mission for NASA, which will source the launch vehicle for MoonFall. Upon launching, Firefly Aerospace Inc.’s (NASDAQ:FLY) Elytra spacecraft will carry the drones over a 45-day transit to the Moon and enter lunar orbit before deorbiting and performing a braking maneuver to deploy the drones approximately 50 km above the Moon’s south pole.

“NASA’s MoonFall is an incredible breakthrough mission well aligned with the bold innovation and successful execution that Firefly is known for. This subcontract underscores our commitment to executing challenging missions that push the boundaries of lunar exploration,” Firefly Aerospace Inc. (NASDAQ:FLY) CEO Jason Kim said.

“Built upon the same proven systems that landed Blue Ghost on the Moon, our Elytra spacecraft are equipped to deploy critical high-mass payloads across cislunar space,” he noted.

Click to continue reading and see the other 5 Stocks With Jaw-Dropping 14-74% Gains.

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