Rambus CEO Seraphin Luc sold 39,914 shares for $3.9M across 6 separate transactions on 2026-03-02
Seraphin Luc, President and CEO of Rambus Inc, conducted 6 separate sales totaling 39,914 shares for $3,936,696.36 at prices ranging from $95.83 to $101.65, representing a 10.8% reduction in his 371.0K share post-transaction holdings. The sales occurred at a blended average price of $98.63, but the stock has since declined to $87.59 (-30.4% from its 52-week high and -23.0% over the past 30 days), suggesting the executive sold ahead of significant downward pressure. Notably, his prior 5 sales at RMBS all resulted in positive 90-day returns (ranging from +2.3% to +25.8%), indicating a 0 of 5 well-timed rate at this ticker—a pattern of selling before gains, not before declines. Against this backdrop of unfavorable timing history and the recent sharp stock deterioration following these sales, the transaction merits close attention to whether broader operational or market conditions prompted the liquidation.
RMBS: CEO Seraphin Luc sells 10,000 shares at $50.88; stock now $46.15, down 32.7% from 52-week high.
Seraphin Luc sold 10,000 shares at $50.88 on 2025-04-01, reducing his holdings by 2.8% to 346.8K shares. The stock has declined significantly since the transaction: it is currently trading at $46.15 (-32.7% from the 52-week high of $68.59) and down 13.4% in the 30 days following the sale. At RMBS specifically, Luc has executed 5 prior trades; his three prior sells with measurable 90-day outcomes show a 1-in-3 well-timed rate (one negative 90-day return, two positive), suggesting limited predictive power at this ticker. His cross-ticker track record across 20 prior sells shows a 55.56% well-timed rate (90-day observation), modestly above coin-flip, with an average 90-day return of 4.0%—indicating his sells have historically been followed by gains, not declines. The company remains fundamentally strong with $145.5M quarterly revenue, annual growth of 20.7%, and $48.7M net income; however, the elevated P/E of 219.76 reflects significant valuation compression since the sale date.
CEO Seraphin Luc sold 10,000 shares of RMBS at $58.64, now down -17.4% from 52-week high; second sale in one week.
Seraphin Luc, President and CEO, sold 10,000 shares at $58.64 on 2025-03-25, reducing his holdings from 316,931 to 306,931 shares. This represents the second sale by Luc in one week—he also sold shares on 2025-03-18. The current stock price of $56.64 is -17.4% from the 52-week high of $68.59 and down -5.8% over 30 days. Luc's cross-ticker track record shows a 55.56% well-timed rate on 19 prior sales with an average 90-day return of +4.0%, while his same-ticker history at RMBS shows 2 of 4 prior measurable sells were well-timed at the 90-day mark. The consecutive sales in a compressed timeframe merit attention given the stock's recent weakness, though the relatively modest reduction (3.2% of pre-transaction holdings) and the company's strong fundamentals (20.7% annual revenue growth, $48.7M net income) provide context.
CEO Seraphin Luc sold 10,000 RMBS shares at $53.79 on 2025-03-18 (value: $537.9K); stock -17.0% from 52-week high.
Seraphin Luc, President and CEO, sold 10,000 shares (10.0K shares) at $53.79, reducing his RMBS holdings from 326.9K to 316.9K shares. The sale occurred at a price $3.17 below the current market price of $56.96, and notably below the 52-week high of $68.59. At the same-ticker level, Luc's prior five RMBS sales showed mixed timing: 3 of 5 were well-timed by the 90-day measure, but recent transactions have been followed by significant declines (e.g., the 2024-03-26 sale preceded a 90-day drop of -14.8%). The current sale occurs with the stock down 9.5% over the prior 30 days and 6.2% over 90 days, amid a challenging valuation backdrop (P/E of 271.24) despite strong quarterly fundamentals showing $145.5M revenue and $48.7M net income with 20.7% annual growth.
