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Aftermath

After an unplanned insider sale, over the next day

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 +0.11% over the next day after an unplanned insider sale (half of them between -0.52% and +0.84%), against +0.06% on any day.

Latest unplanned insider sales, last few sessions

EntryStockIts median, 1 dayConfidenceRankUpEvents
Oct 1 COST Costco Caton Frates (Sr. Executive Vice President), $733,328 +0.15% Medium #18 of 34 50% 12
Sep 30 OKLO John Hanson (Chief of Staff), $41,129 -2.12% Medium #26 of 34 46% 24

Best after an unplanned insider sale

#StockMedian (likely range)ConfidenceAverageUpvs SPYWorst · bestEvents
1 UPST meme +2.71%+0.7 to +4.3 Low +3.08% 100% +2.06% +1% · +6% 12
2 CRDO meme +3.20%+1.5 to +4.2 Medium +1.63% 71% +0.66% -8% · +8% 17
3 CRWD CrowdStrike +0.86%-0.3 to +1.8 Medium +0.77% 70% +0.87% -9% · +8% 23
4 AAPL Apple Inc. +1.81%-0.2 to +2.9 Low +1.81% 75% +1.82% 0% · +4% 4
5 BA Boeing +0.42%-0.7 to +0.7 Low +0.21% 75% +0.21% -1% · +1% 4
6 WMT Walmart +0.40%-0.4 to +0.8 Medium +0.38% 64% +0.57% -1% · +2% 11
7 AMAT Applied Materials +1.43%-0.7 to +3.7 Medium +0.64% 64% +1.25% -7% · +5% 14
8 APLD meme +5.46%-1.4 to +9.3 Low +4.15% 64% +5.99% -1% · +9% 11
9 GME meme +0.61%-1.3 to +1.5 Low +0.25% 71% +0.62% -2% · +2% 7
10 RKLB meme +3.93%-4.6 to +4.4 Medium +1.05% 67% +3.73% -15% · +11% 12
11 TSLA Tesla, Inc. +1.33%-1.0 to +2.4 Low +1.81% 67% +0.97% -1% · +6% 6
12 PLTR Palantir Technologies +1.30%-3.0 to +1.4 Low -0.33% 62% +0.67% -3% · +1% 13
13 NVDA Nvidia +0.41%-0.4 to +0.8 Medium +0.09% 64% +0.87% -4% · +4% 11
14 LLY Lilly (Eli) +0.38%-0.5 to +1.6 Medium +0.56% 64% +0.40% -2% · +2% 11
15 STX Seagate Technology +2.56%-4.2 to +3.4 Medium +0.49% 55% +2.14% -9% · +10% 20
16 WULF meme +4.32%-2.9 to +7.2 Low +3.80% 75% +3.96% -3% · +10% 4
17 WDC Western Digital +2.22%+0.1 to +6.9 Medium +1.99% 80% +2.03% -8% · +7% 10
18 ARM meme +4.80%-8.5 to +4.8 Low +1.64% 80% +4.14% -8% · +5% 5
19 HOOD Robinhood Markets +0.80%0.0 to +1.9 Low +1.91% 60% +0.74% -1% · +8% 5
20 BE Bloom Energy +1.58%-1.2 to +5.2 Medium +0.40% 63% +1.35% -14% · +9% 19
21 NBIS meme +3.42%-1.1 to +10.9 Low +2.49% 70% +2.95% -12% · +11% 10
22 APP AppLovin +1.28%-6.5 to +5.5 Low +0.36% 67% +1.01% -9% · +5% 12
23 AVGO Broadcom +0.27%-2.9 to +0.5 Medium -0.63% 53% -0.95% -3% · +2% 19
24 BB meme +0.18%-0.8 to +8.2 Low +1.91% 57% +0.49% -2% · +8% 14
25 LITE Lumentum -0.20%-2.8 to +1.6 Low -2.10% 50% -0.22% -13% · +2% 6

Worst after an unplanned insider sale

#StockMedian (likely range)ConfidenceAverageUpvs SPYWorst · bestEvents
1 HD Home Depot (The) -1.13%-1.2 to -0.4 Low -0.77% 25% -0.93% -2% · 0% 8
2 TTD meme -1.42%-2.6 to -1.4 Low -1.78% 0% -1.28% -3% · -1% 3
3 TTWO Take-Two Interactive -0.45%-0.7 to +0.1 Low -0.40% 29% +0.44% -2% · +1% 7
4 FICO Fair Isaac -0.54%-1.0 to -0.2 Low -0.45% 25% -1.08% -1% · 0% 4
5 SNDK Sandisk -1.94%-3.9 to -1.3 Low -2.03% 0% -1.82% -4% · 0% 4
6 ORCL Oracle Corporation -0.68%-1.6 to +0.3 Low -0.39% 33% -1.86% -2% · +2% 9
7 GOOG Alphabet Inc. (Class … -0.61%-1.5 to 0.0 Low -0.44% 25% -0.70% -1% · +1% 4
8 VST Vistra Corp. -2.95%-3.0 to +2.1 Low -1.70% 25% -1.46% -3% · +2% 4
9 META Meta Platforms -0.04%-0.2 to +0.5 Low +0.35% 40% +0.96% 0% · +2% 5
10 AEO meme -3.43%-6.5 to -0.4 Medium -2.55% 21% -2.66% -6% · +4% 14
11 LQDA meme -0.72%-2.2 to +1.6 Medium -0.71% 35% -1.22% -5% · +3% 17
12 MU Micron Technology -1.34%-4.7 to +0.2 Medium -0.83% 42% -1.30% -10% · +9% 12
13 CRWV meme -0.39%-1.5 to +1.9 High +0.36% 46% +0.17% -8% · +19% 79
14 ONDS meme -5.59%-7.1 to +3.1 Low -2.63% 38% -5.35% -7% · +8% 8
15 OKLO meme -2.12%-6.3 to +2.2 Medium -0.84% 46% -2.44% -10% · +16% 24
16 AMD Advanced Micro Devices -0.09%-0.1 to +0.7 Low -0.44% 40% -0.40% -4% · +1% 5
17 NOW ServiceNow -0.65%-4.3 to +0.7 Low -1.59% 43% -1.65% -8% · +2% 7
18 MSFT Microsoft +0.13%-0.2 to +0.3 Medium -0.03% 75% -0.18% -2% · +1% 8
19 NFLX Netflix -0.02%-0.7 to +0.6 Low -0.30% 43% +0.28% -3% · +1% 7
20 INTC Intel -0.74%-0.8 to +4.5 Low +0.98% 33% +0.51% -1% · +4% 3
21 COHR Coherent Corp. -0.46%-3.5 to +0.5 Medium -0.24% 40% -0.44% -8% · +8% 10
22 UBER Uber +0.09%-0.9 to +0.3 Low -0.04% 50% -0.29% -2% · +2% 6
23 COST Costco +0.15%-0.6 to +0.6 Medium +0.22% 50% -0.15% -1% · +2% 12
24 CVNA Carvana -0.07%-2.9 to +4.4 Low +0.54% 44% -0.06% -6% · +8% 9
25 LITE Lumentum -0.20%-2.8 to +1.6 Low -2.10% 50% -0.22% -13% · +2% 6

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 day 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.