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Insider Trading Intelligence
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Necip Sayiner

RMBS
DIRECTOR · RAMBUS INC · CIK 0001338515
FILING MIX · LIFETIME56%/44%
BUYS
23
SELLS
18
TOTAL VALUE
$7.81M
COMPANIES
5
ACTIVE SINCE
Apr 2020
HOLDINGS NOW
31,035
AVG SELL PX
$95.82
TRADE KIND
SHOWING 41 / 41
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
13 backtested trades · 8 horizons · 17 pending
Forward-return performance of every backtestable P/S trade by Necip Sayiner, 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
7d13+53.85%+1.83%+0.14%+1.69%+0.00%
14d13+46.15%+1.08%-0.30%+1.75%+0.83%
30d13+46.15%+2.51%-0.55%+3.06%-0.17%
60d13(2 pending)+36.36%+24.84%+1.46%+23.38%+1.74%
90d13(2 pending)+36.36%+24.68%+3.20%+21.49%+4.66%
180d13(2 pending)+27.27%+79.61%+7.85%+2.52%-0.56%
1y13(5 pending)+50.00%+20.43%+20.72%-0.30%-6.30%
2y13(6 pending)+42.86%+17.39%+41.16%-23.77%-14.46%
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 · 18,223 shares · as of Jun 3, 2026
011,65623,31334,96946,625202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
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 · 23 buys / 18 sellsCOVERAGE · 25 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
ACLS
AXCELIS TECHNOLOGIES INC
SALE
1,586$157.44$249.7K7,112Jun 3, 2026Jun 4, 2026View →
RMBS
RAMBUS INC
SALE
5,000$170.15$850.8K18,223Jun 3, 2026Jun 3, 2026View →
ACLS
AXCELIS TECHNOLOGIES INC
PURCHASEGRANT
Stock grant
1,4408,698May 15, 2026May 18, 2026View →
RMBS
RAMBUS INC
SALE
9,824$130.18$1.28M23,223May 8, 2026May 11, 2026View →
SNDK
SANDISK CORP
SALE
579$1,503.11$870.3K2,900May 8, 2026May 11, 2026View →
TER
TERADYNE, INC
PURCHASEGRANT
Stock grant
6682,800May 8, 2026May 12, 2026View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
2,22333,047Apr 1, 2026Apr 3, 2026View →
SNDK
SANDISK CORP
SALE
1,271$195.14$248.0K3,479Dec 3, 2025Dec 4, 2025View →
SNDK
SANDISK CORP
PURCHASEGRANT
Stock grant
9794,750Nov 18, 2025Nov 19, 2025View →
RMBS
RAMBUS INC
SALE
7,500$85.63$642.2K30,824Sep 11, 2025Sep 12, 2025View →
RMBS
RAMBUS INC
SALE
7,500$73.53$551.4K38,324Aug 8, 2025Aug 11, 2025View →
TER
TERADYNE, INC
PURCHASEGRANT
Stock grant
2,1322,132Jul 1, 2025Jul 3, 2025View →
ACLS
AXCELIS TECHNOLOGIES INC
PURCHASEGRANT
Stock grant
3,5867,258May 15, 2025May 15, 2025View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
3,82445,824Apr 1, 2025Apr 3, 2025View →
SNDK
SANDISK CORP
PURCHASEGRANT
Stock grant
3,7713,771Mar 3, 2025Mar 4, 2025View →
RMBS
RAMBUS INC
SALE
4,625$66.74$308.7K42,000Feb 19, 2025Feb 19, 2025View →
ACLS
AXCELIS TECHNOLOGIES INC
PURCHASEGRANT
Stock grant
1,1623,172May 15, 2024May 15, 2024View →
ACLS
AXCELIS TECHNOLOGIES INC
PURCHASEGRANT
Stock grant
1,6623,672May 15, 2024May 16, 2024View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
2,97246,625Apr 1, 2024Apr 2, 2024View →
ACLS
AXCELIS TECHNOLOGIES INC
PURCHASEGRANT
Stock grant
670670Mar 15, 2024Mar 15, 2024View →
ACLS
AXCELIS TECHNOLOGIES INC
PURCHASEGRANT
Stock grant
1,3402,010Mar 15, 2024Mar 15, 2024View →
RMBS
RAMBUS INC
PURCHASE
15,000$13.94$209.0K43,653Nov 8, 2023Nov 9, 2023View →
RMBS
RAMBUS INC
SALE
15,0000Nov 8, 2023Nov 9, 2023View →
RMBS
RAMBUS INC
PURCHASE
10,000$13.94$139.3K38,653Nov 6, 2023Nov 7, 2023View →
RMBS
RAMBUS INC
SALE
10,000$57.43$574.3K28,653Nov 6, 2023Nov 7, 2023View →
RMBS
RAMBUS INC
SALE
10,00015,000Nov 6, 2023Nov 7, 2023View →
POWI
POWER INTEGRATIONS INC
SALE
4,500$89.95$404.8K0May 26, 2023May 30, 2023View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
3,65328,653Apr 3, 2023Apr 4, 2023View →
POWI
POWER INTEGRATIONS INC
SALE
1,234$84.52$104.3K4,500Feb 14, 2023Feb 16, 2023View →
RMBS
RAMBUS INC
SALE
2,873$45.53$130.8K25,000Feb 10, 2023Feb 13, 2023View →
RMBS
RAMBUS INC
SALE
15,000$38.16$572.4K27,873Nov 15, 2022Nov 16, 2022View →
RMBS
RAMBUS INC
PURCHASE
15,000$13.94$209.0K42,873Nov 15, 2022Nov 16, 2022View →
RMBS
RAMBUS INC
SALE
15,00025,000Nov 15, 2022Nov 16, 2022View →
POWI
POWER INTEGRATIONS INC
PURCHASEGRANT
Stock grant
1,7115,734Jul 1, 2022Jul 6, 2022View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
5,40827,873Apr 1, 2022Apr 4, 2022View →
POWI
POWER INTEGRATIONS INC
SALE
2,500$104.53$261.3K4,023Aug 25, 2021Aug 27, 2021View →
POWI
POWER INTEGRATIONS INC
PURCHASEGRANT
Stock grant
1,4536,523Jul 1, 2021Jul 6, 2021View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
8,53822,465Apr 1, 2021Apr 2, 2021View →
POWI
POWER INTEGRATIONS INC
SALE
1,725$120.17$207.3K2,535Aug 4, 2020Aug 5, 2020View →
POWI
POWER INTEGRATIONS INC
PURCHASEGRANT
Stock grant
1,0354,260Jul 1, 2020Jul 6, 2020View →
RMBS
RAMBUS INC
PURCHASEGRANT
Stock grant
13,92713,927Apr 1, 2020Apr 2, 2020View →
Other insiders · RMBS
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About this filer
CIK 0001338515
ROLE
Director
PRIMARY
RMBS
COMPANIES
5
ACTIVE SINCE
Apr 2020
MARKETPEEL · /INSIDER/0001338515DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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