RMBS RAMBUS INC Insider Trading

Director Emiko Higashi sold 10,000 RMBS shares (2 transactions) for $1,605,000.00, reducing stake 16.8% amid 53.1% 30-day rally

Director Emiko Higashi executed 2 separate sales totaling 10,000 shares for $1,605,000.00 on June 2, 2026, at prices of $163.00 and $158.00, reducing her post-transaction holdings to 49,519 shares from 59,519 shares (a 16.8% reduction in her stake). The sales occurred during a period of significant momentum: the stock has risen 53.1% over the prior 30 days and 85.7% over the prior 90 days, currently trading at $170.66—near the 52-week high of $167.71. The transactions were executed below the current price, but the company's fundamentals show strong operational performance with quarterly revenue of $180,189,000.00 and net income of $59,858,000.00, though the elevated 80.12 P/E ratio reflects significant market pricing. The scale of the reduction (16.8% of holdings) in a rising market context warrants investor attention to director positioning and conviction levels.

Xianzhi Sean Fan (EVP, COO) sells 37,914 shares at $151.69 avg for $5.8M; holds 168,358 shares post-trade

EVP and COO Xianzhi Sean Fan executed 2 separate sales totaling 37,914 shares for $5,751,225.53, reducing his holdings by 18.4% from 206,272 to 168,358 shares. His cross-ticker track record shows a 100.00% well-timed rate across 7 prior sells (average 90d return -14.2%), and at RMBS specifically, 3 of 3 prior measurable sells were well-timed, with the most recent sale on 2025-02-19 realizing a 90d return of -18.2%. The current share price of $157.23 sits 2.8% below the 52-week high of $161.80, and the stock has gained 55.5% over the past 90 days. His substantial reduction in stake amid strong recent performance and consistent prior sell timing warrants investor attention to whether this represents a shift in executive conviction at a company trading at a P/E of 73.82.

Director Sayiner Necip sold nearly 10,000 shares of RMBS for $1.28M, his 7th open-market sale in three years.

Sayiner Necip, a director at Rambus, sold a meaningful stake totaling approximately $1.28 million, representing nearly 30% of his holdings. This is his seventh open-market sale over the past three years—a consistent pattern of disposition with no countervailing open-market purchases during that window. The sale occurred while the stock trades noticeably below its 52-week high and in the midst of a strong recent rally that accelerated over both the past three months and past month. The company itself presents healthy fundamentals: it is profitable with meaningful annual net income and has demonstrated strong revenue growth, though the stock trades at a stretched valuation multiple. The timing of the sale during a period of strength, combined with Necip's established pattern of regular selling, suggests a director maintaining a gradual reduction in holdings rather than a response to recent weakness or operational concern.

Director Meera Rao sells 8,538 shares of RMBS at $118.08 for $1.0M, reducing holdings by 27.1% to 22,946 shares.

Director Meera Rao executed a substantial sale of 8,538 shares, reducing her shareholding from 31,484 shares to 22,946 shares—a -27.1% reduction in her direct holdings. The sale price of $118.08 sits 4.7% below the current 52-week high of $125.93 while the stock has delivered strong recent momentum (+29.4% over 30 days, +16.4% over 90 days), placing the transaction in a context of appreciation. The company itself shows robust fundamental performance with annual revenue growth of +27.1% and a quarterly net income of $48,377,000.00 against revenue of $178,513,000.00, though the P/E of 46.34 reflects premium valuation. The magnitude of the sale—approximately one-quarter of prior holdings in a single transaction—is material and warrants attention to whether this represents a structured program or a one-time redeployment decision.

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.

CFO Lynch Desmond sold 9,074 shares at $101.17–$101.99 for $920,972.59 on 2025-10-06

Lynch Desmond, SVP and CFO, executed two separate sales totaling 9,074 shares for $920,972.59, reducing his holdings by 14.1% from 64,430 to 55,356 shares. At transaction prices averaging $101.50, the sales occurred near the 52-week high of $107.38 (within 5.9% of peak), in an environment where the stock has risen 35.0% over the prior 30 days and 55.0% over the prior 90 days. His cross-ticker track record shows 3 prior sells with a 90-day well-timed rate of 50.0% (50% of sells preceded declines), while his same-ticker history at RMBS shows 1 of 2 prior measurable sells were well-timed at the 90-day mark. The company reports strong fundamentals: $172.2M quarterly revenue, $57.9M net income, +20.7% annual revenue growth, and a P/E of 47.42. This sale occurs within a context of strong recent price appreciation and solid operational performance, without flags indicating a scheduled trading plan.

RMBS CFO Lynch Desmond sells 9,074 shares at $91.70; stock now at $97.05 (52-week high). RMBS P/E 45.56.

Lynch Desmond, SVP and CFO of Rambus, sold 9,074 shares (9.1K shares) for $832,098.50 ($832.1K) at $91.70 on 2025-09-15, reducing his holdings by 12.3% to 64,430 shares (64.4K shares). The sale occurred when the stock was trading at the 52-week high of $97.05, having appreciated 30.8% over 30 days and 60.3% over 90 days. His same-ticker history at RMBS shows 2 prior sells (on 2023-12-07 and 2023-12-08) that generated modest divergent returns, with only 1 of 2 well-timed at the 90-day mark. Rambus fundamentals remain robust: revenue of $172.2M (latest quarter), net income of $57.9M, annual revenue growth of 20.7%, and market cap of $10.4B, though the P/E of 45.56 reflects a richly valued stock relative to historical norms.

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.