MarketPeel
Insider Trading Intelligence
Pricing
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XF

Xianzhi Sean Fan

RMBS
COO · RAMBUS INC · CIK 0001583840
FILING MIX · LIFETIME30%/70%
BUYS
12
SELLS
28
TOTAL VALUE
$47.20M
COMPANIES
1
ACTIVE SINCE
Feb 2020
HOLDINGS NOW
168,358
AVG SELL PX
$62.06
TRADE KIND
SHOWING 40 / 40
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
11 backtested trades · 8 horizons · 1 pending
Forward-return performance of every backtestable P/S trade by Xianzhi Sean Fan, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d11+63.64%-2.58%+0.53%-3.11%-2.05%—
14d11+45.45%-2.68%+0.63%-3.31%-0.99%—
30d11+72.73%-1.51%-0.10%-1.42%-0.74%—
60d11+63.64%-7.04%-0.59%-6.45%-0.66%—
90d11+54.55%+1.89%+4.02%-2.13%-6.20%—
180d11+54.55%-2.58%+9.12%-11.70%-28.06%—
1y11+45.45%+22.06%+19.88%+2.18%-10.87%—
2y11(1 pending)+0.00%+52.59%+45.20%+7.39%+5.35%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
RMBS · 168,358 shares · as of May 26, 2026
071,589143,179214,768286,357202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 12 buys / 28 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
RMBS
RAMBUS INC
SALE
EVP, COO
100$152.35$15.2K168,358May 26, 2026May 26, 2026 ↗View →
RMBS
RAMBUS INC
SALE
EVP, COO
37,814$151.69$5.74M168,458May 26, 2026May 26, 2026 ↗View →
RMBS
RAMBUS INC
SALE
EVP, COO
9,916$89.95$891.9K206,272Apr 1, 2026Apr 3, 2026 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
22,234——216,188Apr 1, 2026Apr 3, 2026 ↗View →
RMBS
RAMBUS INC
SALE
EVP, COO
92,403$113.71$10.51M193,954Feb 1, 2026Feb 3, 2026 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
148,802——286,357Feb 1, 2026Feb 3, 2026 ↗View →
RMBS
RAMBUS INC
SALEGRANT
Gift
300——137,555Nov 21, 2025Nov 21, 2025 ↗View →
RMBS
RAMBUS INC
SALEGRANT
Gift
300——137,855Nov 19, 2025Nov 20, 2025 ↗View →
RMBS
RAMBUS INC
SALE
EVP, COO
3,496$52.29$182.8K138,155Apr 1, 2025Apr 3, 2025 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
47,810——141,651Apr 1, 2025Apr 3, 2025 ↗View →
RMBS
RAMBUS INC
SALE
EVP, COO
52,327$68.02$3.56M93,841Feb 19, 2025Feb 19, 2025 ↗View →
RMBS
RAMBUS INC
SALE
EVP, COO
78,078$60.35$4.71M146,168Feb 1, 2025Feb 4, 2025 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
112,675——224,246Feb 1, 2025Feb 4, 2025 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
26,112——111,571Apr 1, 2024Apr 2, 2024 ↗View →
RMBS
RAMBUS INC
SALE10b5-1
10b5-1 plan
15,770$64.91$1.02M85,459Mar 4, 2024Mar 4, 2024 ↗View →
RMBS
RAMBUS INC
SALE10b5-1
10b5-1 plan
20,000$60.99$1.22M101,229Mar 1, 2024Mar 4, 2024 ↗View →
RMBS
RAMBUS INC
SALE10b5-1
10b5-1 plan
2,004$55.00$110.2K121,229Feb 20, 2024Feb 21, 2024 ↗View →
RMBS
RAMBUS INC
SALE10b5-1
10b5-1 plan
20,000$58.53$1.17M123,233Feb 12, 2024Feb 13, 2024 ↗View →
RMBS
RAMBUS INC
SALE
SVP, COO
20,000$68.73$1.37M143,233Feb 5, 2024Feb 6, 2024 ↗View →
RMBS
RAMBUS INC
SALE
SVP, COO
6,168$68.37$421.7K163,233Feb 5, 2024Feb 6, 2024 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
76,844——228,163Feb 1, 2024Feb 2, 2024 ↗View →
RMBS
RAMBUS INC
SALE
SVP, COO
58,762$68.15$4.00M169,401Feb 1, 2024Feb 2, 2024 ↗View →
RMBS
RAMBUS INC
SALE10b5-1
10b5-1 plan
16,904$66.35$1.12M151,319Dec 11, 2023Dec 12, 2023 ↗View →
RMBS
RAMBUS INC
SALE
COO
17,309$54.99$951.8K168,223Aug 29, 2023Aug 30, 2023 ↗View →
RMBS
RAMBUS INC
SALE
COO
52,189$43.62$2.28M97,380Feb 3, 2023Feb 6, 2023 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
88,152——185,532Feb 3, 2023Feb 6, 2023 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
34,554——149,569Feb 1, 2023Feb 2, 2023 ↗View →
RMBS
RAMBUS INC
SALE
COO
12,871$43.41$558.7K115,015Feb 1, 2023Feb 2, 2023 ↗View →
RMBS
RAMBUS INC
SALE
COO
52,852$37.88$2.00M127,886Nov 18, 2022Nov 21, 2022 ↗View →
RMBS
RAMBUS INC
SALE
COO
10,277$38.30$393.6K180,738Nov 16, 2022Nov 17, 2022 ↗View →
RMBS
RAMBUS INC
SALE
COO
51,772$38.51$1.99M191,015Nov 15, 2022Nov 16, 2022 ↗View →
RMBS
RAMBUS INC
SALE
COO
6,041$25.07$151.4K242,787Feb 3, 2022Feb 4, 2022 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
116,165——190,143Feb 1, 2022Feb 2, 2022 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
58,685——248,828Feb 1, 2022Feb 2, 2022 ↗View →
RMBS
RAMBUS INC
SALE
COO
66,091$25.56$1.69M73,978Feb 1, 2022Feb 2, 2022 ↗View →
RMBS
RAMBUS INC
SALE
COO
29,521$24.42$720.9K140,069Sep 3, 2021Sep 7, 2021 ↗View →
RMBS
RAMBUS INC
SALE
COO
4,304$19.22$82.7K169,590Feb 3, 2021Feb 4, 2021 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
38,422——173,894Feb 1, 2021Feb 3, 2021 ↗View →
RMBS
RAMBUS INC
SALE
COO
23,463$13.78$323.3K135,472Sep 3, 2020Sep 8, 2020 ↗View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
46,153——158,935Feb 3, 2020Feb 5, 2020 ↗View →
Other insiders · RMBS
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About this filer
CIK 0001583840
ROLE
COO
PRIMARY
RMBS
COMPANIES
1
ACTIVE SINCE
Feb 2020
MARKETPEEL · /INSIDER/0001583840DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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