RKLB Stock Suffers Worst Selloff In 2 Years — President, COO, Other Insiders Cashed Out $18M After Record Highs

• President Marvin Clevenger sold 3,500 shares, while COO Frank Klein and general counsel Arjun Kampani sold shares under pre-arranged Rule 10b5-1 trading plans.
• RKLB faced pressure from a Blue Origin rocket explosion and cooling sentiment around SpaceX's IPO valuation.
• The company recently completed its ninth dedicated Electron launch for Synspective.

Shares of Rocket Lab USA, Inc. (RKLB) suffered their worst selloff in over two years on Monday after four company insiders collectively cashed out $18 million worth of stock after a record rally that made RKLB one of the best-performing space stocks in May.

RKLB stock hit eight record highs in May and posted their best month since November 2024. 

Who Sold RKLB Stock?

Fresh filings show that four Rocket Lab insiders sold shares on Monday. President of Rocket Lab, Marvin Bradford Clevenger, sold 3,500 shares at an average price of $146.67, generating $513,000 in proceeds. After the transaction, he retained 473,975 shares.

COO Frank Klein sold 36,860 shares through a Rule 10b5-1 trading plan adopted in September 2025. The transactions were executed across multiple sales between $143 and $150 per share, generating about $5.4 million in proceeds. Klein continues holding over 1 million shares after the sale. 

Meanwhile, senior vice president and general counsel Arjun Kampani sold 23,804 shares under a Rule 10b5-1 trading plan, which was also adopted in September 2025. The sales generated $3.5 million, while leaving Kampani with 352,705 shares.

Director Alexander Slusky sold 60,000 shares through the family partnership Abalone Cove at average prices of $149.10 and $150, generating nearly $9 million. After the transaction, Slusky held 436,000 shares. In total, the four insiders sold 124,000 shares worth $18.4 million. 

Defense Contracts Fuel RKLB Rally

Last week, Rocket Lab said that its proposed solution for the Space Development Agency's (SDA) Tracking Layer Tranche 3 constellation passed the program's System Requirements Review. 

Rocket Lab said the solution has now emerged as the technical baseline for the SDA program. The milestone secured an $816 million contract award in addition to a previously awarded $515 million contract, bringing the total value of SDA-related awards to over $1.3 billion. The Tracking Layer Tranche 3 constellation is based on Rocket Lab's Lightning satellite platform and is designed to provide missile warning, tracking and defense capabilities against advanced threats, including hypersonic missiles. 

Just days earlier, Rocket Lab also secured a separate $90 million contract from the U.S. Space Force to design, manufacture, integrate and operate two geostationary satellites carrying the Heimdall space domain awareness payload. The award marked the company's first satellite production program for geostationary orbit.

RKLB Boosts Acquisitions And Launches

Rocket Lab is also expanding its space systems capabilities through acquisitions. Last week, the company completed its acquisition of Motiv Space Systems, a California-based developer of space robotics, motion-control systems, and precision spacecraft mechanisms, and rebranded it as Rocket Lab Robotics. Motiv's technology has been used in several planetary exploration programs, including NASA's Mars Perseverance Rover and the CADRE Lunar Rover Program.

The deal follows a series of acquisitions, including Mynaric, Geost, Optical Support, and SolAero Technologies, as Rocket Lab continues to build a vertically integrated space infrastructure business.

Meanwhile, the company recently completed its ninth dedicated Electron mission for Synspective, extending one of the most active commercial launch partnerships in the small-satellite industry. The mission further reinforced the Electron's position as one of the most frequently flown small-launch vehicles on the market.

Other Factors Affecting RKLB Stock

Shares of Rocket Lab and several space peers came under pressure after a Blue Origin New Glenn rocket suffered an explosion during a hot-fire test at Cape Canaveral. The incident also came after an upper-stage anomaly during New Glenn's third mission in May that prevented AST SpaceMobile's BlueBird 7 satellite from reaching its intended orbit.

On the other hand, excitement around SpaceX's long-awaited IPO has begun to fluctuate. The filing initially sparked a rally across space stocks, including Rocket Lab, as investors gained fresh insights into Elon Musk's vision for reusable rockets, satellite communications, direct-to-device services, AI infrastructure, orbital data centers and Mars colonization.

However, sentiment cooled after reports said that SpaceX could seek a valuation of $1.8 trillion rather than over $2 trillion. Musk later disputed those reports, though investors continued to reassess expectations for what could be the largest IPO in Wall Street history.

How Do Retail Traders Feel About RKLB?

On Stocktwits, retail sentiment for RKLB improved to ‘bullish’ from ‘neutral’ levels a day ago amid over a 1,200% jump in 24-hour message volumes.

One user said, “$RKLB the big boys want your shares cheap! I managed to buy 3 more shares today.”

Another user said, “Pullbacks are healthy consolidations in a secular bull market with the mid to long term runway entirely clear for takeoff.”

RKLB stock has surged 357% over the past year. 

For updates and corrections, email newsroom[at]stocktwits[dot]com.

Read Next: SPCE Stock Bucks Space Sector Selloff Ahead Of SpaceX IPO — Richard Branson's Virgin Galactic Torches $64M In Short Bets