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Aftermath

After an unplanned insider sale, over the next week

An insider's sale outside a pre-arranged 10b5-1 plan; entry the session after its SEC filing. Each stock's median gain after its own events of this kind in the past 5 years, from the close of the session the event was known. Updated .

The typical S&P 500 stock gained +0.19% over the next week after an unplanned insider sale (half of them between -0.87% and +2.09%), against +0.27% on any day.

Latest unplanned insider sales, last few sessions

EntryStockIts median, 1 weekConfidenceRankUpEvents
Oct 1 COST Costco Caton Frates (Sr. Executive Vice President), $733,328 -0.26% Medium #25 of 34 20% 10
Sep 30 OKLO John Hanson (Chief of Staff), $41,129 -5.00% Medium #33 of 34 19% 21

Best after an unplanned insider sale

#StockMedian (likely range)ConfidenceAverageUpvs SPYWorst · bestEvents
1 PLTR Palantir Technologies +11.40%+7.7 to +14.2 Low +11.10% 100% +10.20% +8% · +14% 13
2 UPST meme +7.00%-0.3 to +8.5 Low +5.37% 75% +5.78% -2% · +9% 12
3 META Meta Platforms +5.51%-0.4 to +7.3 Low +4.34% 80% +4.76% 0% · +7% 5
4 WDC Western Digital +2.97%+1.3 to +3.5 Medium +3.31% 80% +3.15% -4% · +11% 10
5 TSLA Tesla, Inc. +3.69%+0.7 to +3.9 Low +6.05% 100% +2.94% 0% · +22% 6
6 MU Micron Technology +4.72%-1.8 to +8.1 Medium +4.19% 67% +4.58% -5% · +14% 12
7 HOOD Robinhood Markets +13.21%+6.9 to +15.4 Low +7.92% 80% +13.27% -13% · +18% 5
8 CVNA Carvana +5.31%-1.7 to +6.0 Low +5.00% 56% +5.12% -4% · +19% 9
9 LLY Lilly (Eli) +2.15%-0.2 to +2.6 Medium +1.73% 64% +2.25% -4% · +9% 11
10 WULF meme +2.81%-1.4 to +4.0 Low +3.28% 75% +2.38% -1% · +9% 4
11 ONDS meme +20.70%-5.2 to +20.7 Low +15.14% 75% +21.75% -20% · +49% 8
12 CRWV meme +2.70%-3.6 to +4.6 High +2.80% 52% +1.64% -19% · +36% 79
13 CRWD CrowdStrike +1.93%+0.1 to +5.0 Medium +2.15% 74% +2.17% -10% · +20% 23
14 ARM meme +33.39%-19.3 to +33.4 Low +22.27% 80% +31.66% -19% · +33% 5
15 LITE Lumentum +4.59%-2.0 to +10.7 Low +3.18% 50% +6.58% -16% · +15% 6
16 NVDA Nvidia +1.27%-0.7 to +5.8 Medium +1.83% 64% +1.26% -4% · +9% 11
17 AMAT Applied Materials +1.58%-0.1 to +1.6 Medium +4.26% 71% +3.95% -9% · +19% 14
18 AVGO Broadcom +1.15%-3.1 to +2.8 Medium +0.17% 53% +0.03% -7% · +5% 19
19 CRDO meme +7.25%+0.3 to +16.7 Medium +12.33% 71% +7.66% -15% · +49% 17
20 APLD meme +7.01%-3.9 to +39.1 Low +15.49% 73% +7.45% -4% · +39% 11
21 WMT Walmart +0.92%-1.4 to +1.8 Medium +0.95% 64% +1.25% -3% · +5% 11
22 GME meme +1.04%-1.3 to +1.4 Low +0.59% 57% -1.38% -8% · +11% 7
23 APP AppLovin +1.25%-5.4 to +19.1 Low +4.60% 67% +3.02% -17% · +19% 12
24 NBIS meme +1.77%-0.6 to +33.2 Low +7.99% 50% +0.69% -14% · +33% 10
25 AMD Advanced Micro Devices +0.47%-5.6 to +3.1 Low -3.11% 60% +0.61% -17% · +3% 5

Worst after an unplanned insider sale

#StockMedian (likely range)ConfidenceAverageUpvs SPYWorst · bestEvents
1 SNDK Sandisk -10.02%-17.0 to -9.8 Low -10.44% 0% -7.82% -17% · -5% 4
2 HD Home Depot (The) -2.91%-4.4 to -2.5 Low -2.46% 12% -3.20% -5% · +4% 8
3 OKLO meme -5.00%-9.2 to -2.9 Medium -4.52% 19% -6.84% -17% · +29% 21
4 VST Vistra Corp. -3.19%-6.5 to -1.3 Low -3.56% 0% -3.88% -7% · -1% 4
5 UBER Uber -2.41%-6.4 to -2.0 Low -2.75% 17% -3.73% -8% · +5% 6
6 TTD meme -5.73%-9.4 to +1.3 Low -4.59% 33% -2.77% -9% · +1% 3
7 BA Boeing -0.98%-2.9 to 0.0 Low -1.21% 0% +0.88% -3% · 0% 4
8 BE Bloom Energy -7.15%-8.9 to -0.5 Medium -6.49% 26% -7.66% -24% · +8% 19
9 MSFT Microsoft -0.76%-2.8 to +0.5 Medium -1.18% 38% -1.22% -7% · +2% 8
10 TTWO Take-Two Interactive -0.62%-2.5 to +1.3 Low +0.07% 29% -1.25% -4% · +8% 7
11 FICO Fair Isaac -0.39%-1.5 to +0.2 Low +0.08% 50% +0.90% -2% · +3% 4
12 COST Costco -0.26%-1.6 to -0.1 Medium +0.32% 20% -0.75% -3% · +8% 10
13 COHR Coherent Corp. -3.11%-6.7 to +3.7 Medium +0.24% 40% -0.21% -12% · +17% 10
14 ORCL Oracle Corporation -0.90%-5.4 to -0.1 Low -2.03% 22% -0.64% -7% · +2% 9
15 GOOG Alphabet Inc. (Class … -2.98%-7.1 to 0.0 Low -0.04% 25% -4.02% -7% · +13% 4
16 LQDA meme -0.05%-2.5 to +1.2 Medium -0.87% 35% -2.68% -10% · +15% 17
17 RKLB meme -1.78%-3.2 to +7.5 Medium +4.15% 42% -2.37% -23% · +43% 12
18 AAPL Apple Inc. +0.10%-2.5 to +1.8 Low -0.06% 50% +0.72% -2% · +2% 4
19 NFLX Netflix +0.01%-0.8 to +5.2 Low +1.27% 57% -0.34% -5% · +5% 7
20 STX Seagate Technology -0.61%-7.7 to +8.9 Medium +0.48% 45% -0.07% -20% · +15% 20
21 INTC Intel -0.64%-5.0 to +11.5 Low +1.95% 33% -1.21% -5% · +12% 3
22 NOW ServiceNow +0.28%-8.3 to +0.6 Low -2.79% 71% -2.95% -16% · +2% 7
23 BB meme -0.51%-0.8 to +16.4 Low +3.57% 29% -0.63% -6% · +16% 14
24 AEO meme +0.56%-1.4 to +4.1 Medium +1.60% 71% +0.34% -6% · +11% 14
25 AMD Advanced Micro Devices +0.47%-5.6 to +3.1 Low -3.11% 60% +0.61% -17% · +3% 5

Stocks with at least 3 independent periods, ordered on an evidence-weighted median: each stock's median is pulled toward the S&P 500 typical value in proportion to its uncertainty, so a lucky handful of events cannot top the list. Confidence counts independent holding periods (overlapping ones count once): High 20+, Medium 8+, Low 3+. Median and average gain over the next week from the entry close; Up = share of events followed by a gain; vs SPY = median gain minus SPY over the same sessions. Ranks on the stock pages place each stock among the S&P 500 stocks. Small samples are noisy, and the past does not repeat on schedule. Not advice.