DVA
−$4.36M
31,404 sh @ $139
BUFFETT WARREN E
Director, 10% Owner, Chairman and CEO · SEC CIK 315090Advertisement
Buy track record
How this insider's open-market purchases have performed100%
of buys now in profit
60 up · 0 down
Avg return since buy+39.0%
Median return+40.2%
Best trade+48.4%
Worst trade+23.0%
Buys scored60
Average return by holding period — separates good entry timing from riding one long winner
After 1 month
+6.2%
98% won · 60 trades
After 3 months
+16.4%
92% won · 60 trades
After 6 months
+28.9%
80% won · 60 trades
After 12 months
+16.1%
84% won · 56 trades
| Date | Company | 90d trend | Buy price | Value | ΔOwn | 1M | 3M | 6M | 12M | To date |
|---|---|---|---|---|---|---|---|---|---|---|
| Aug 4, 2025 | SIRI | $22 | $22.43M | +0.8% | +10.5% | +2.3% | −1.7% | — | +33.5% | |
| Aug 1, 2025 | SIRI | $21 | $40.57M | +1.6% | +10.5% | +4.7% | −1.4% | — | +36.3% | |
| Jul 31, 2025 | SIRI | $21 | $41.62M | +1.7% | +10.8% | +4.0% | −1.1% | — | +36.7% | |
| Jul 31, 2025 | SIRI | $21 | $1.83M | +0.1% | +10.8% | +4.0% | −1.1% | — | +36.7% | |
| Feb 7, 2025 | OXY | $47 | $35.72M | +0.3% | +1.0% | −16.2% | −5.8% | +1.9% | +24.7% | |
| Feb 3, 2025 | SIRI | $23 | $10.17M | +0.4% | +1.2% | −10.4% | −7.8% | −11.9% | +23.1% | |
| Feb 3, 2025 | SIRI | $24 | $6.83M | +0.2% | +1.2% | −10.4% | −7.8% | −11.9% | +23.1% | |
| Jan 31, 2025 | SIRI | $24 | $19.84M | +0.7% | +1.2% | −17.9% | −10.0% | −11.0% | +23.0% | |
| Jan 30, 2025 | SIRI | $23 | $17.12M | +0.6% | +5.1% | −6.3% | +1.5% | −7.6% | +27.8% | |
| Jan 3, 2025 | VRSN | $205 | $2.4M | +0.1% | +5.1% | +24.2% | +39.6% | +17.4% | +38.2% | |
| Jan 3, 2025 | VRSN | $205 | $164K | — | +5.1% | +24.2% | +39.6% | +17.4% | +38.2% | |
| Jan 2, 2025 | VRSN | $205 | $1.2M | — | +5.3% | +24.6% | +37.9% | +18.3% | +38.5% | |
| Dec 31, 2024 | VRSN | $205 | $332K | — | +3.9% | +22.7% | +40.1% | +18.4% | +37.3% | |
| Dec 30, 2024 | VRSN | $203 | $1.02M | — | +4.3% | +23.8% | +41.2% | +20.9% | +38.5% | |
| Dec 30, 2024 | VRSN | $204 | $2.4M | +0.1% | +4.3% | +23.8% | +41.2% | +20.9% | +38.5% | |
| Dec 30, 2024 | VRSN | $205 | $2M | +0.1% | +4.3% | +23.8% | +41.2% | +20.9% | +38.5% | |
| Dec 27, 2024 | VRSN | $203 | $1.34M | +0.1% | +4.3% | +24.9% | +41.4% | +21.2% | +39.3% | |
| Dec 27, 2024 | VRSN | $204 | $3.65M | +0.1% | +4.3% | +24.9% | +41.4% | +21.2% | +39.3% | |
| Dec 27, 2024 | VRSN | $204 | $970.1K | — | +4.3% | +24.9% | +41.4% | +21.2% | +39.3% | |
| Dec 27, 2024 | VRSN | $205 | $513.1K | — | +4.3% | +24.9% | +41.4% | +21.2% | +39.3% | |
| Dec 27, 2024 | VRSN | $206 | $62.8K | — | +4.3% | +24.9% | +41.4% | +21.2% | +39.3% | |
| Dec 26, 2024 | VRSN | $202 | $1.36M | +0.1% | +4.9% | +22.4% | +40.1% | +22.6% | +40.2% | |
| Dec 26, 2024 | VRSN | $203 | $2.24M | +0.1% | +4.9% | +22.4% | +40.1% | +22.6% | +40.2% | |
| Dec 26, 2024 | VRSN | $203 | $21.5K | — | +4.9% | +22.4% | +40.1% | +22.6% | +40.2% | |
| Dec 24, 2024 | VRSN | $200 | $648.5K | — | +4.6% | +21.8% | +41.9% | +23.0% | +41.0% | |
| Dec 24, 2024 | VRSN | $201 | $2.31M | +0.1% | +4.6% | +21.8% | +41.9% | +23.0% | +41.0% | |
| Dec 24, 2024 | VRSN | $202 | $40.3K | — | +4.6% | +21.8% | +41.9% | +23.0% | +41.0% | |
| Dec 23, 2024 | VRSN | $198 | $2.09M | +0.1% | +3.3% | +22.7% | +41.9% | +23.6% | +42.1% | |
| Dec 23, 2024 | VRSN | $199 | $1.89M | +0.1% | +3.3% | +22.7% | +41.9% | +23.6% | +42.1% | |
| Dec 23, 2024 | VRSN | $200 | $2.89M | +0.1% | +3.3% | +22.7% | +41.9% | +23.6% | +42.1% | |
| Dec 23, 2024 | VRSN | $201 | $40.2K | — | +3.3% | +22.7% | +41.9% | +23.6% | +42.1% | |
| Dec 20, 2024 | VRSN | $195 | $1.21M | — | +5.8% | +21.9% | +41.6% | +24.9% | +42.9% | |
| Dec 20, 2024 | VRSN | $197 | $63K | — | +5.8% | +21.9% | +41.6% | +24.9% | +42.9% | |
| Dec 20, 2024 | VRSN | $198 | $213.2K | — | +5.8% | +21.9% | +41.6% | +24.9% | +42.9% | |
| Dec 20, 2024 | VRSN | $199 | $14.59M | +0.6% | +5.8% | +21.9% | +41.6% | +24.9% | +42.9% | |
| Dec 20, 2024 | VRSN | $199 | $1.91M | +0.1% | +5.8% | +21.9% | +41.6% | +24.9% | +42.9% | |
| Dec 20, 2024 | VRSN | $200 | $633K | — | +5.8% | +21.9% | +41.6% | +24.9% | +42.9% | |
| Dec 20, 2024 | VRSN | $201 | $20.1K | — | +5.8% | +21.9% | +41.6% | +24.9% | +42.9% | |
| Dec 19, 2024 | VRSN | $191 | $210.2K | — | +8.8% | +25.2% | +45.5% | +27.3% | +46.9% | |
| Dec 19, 2024 | VRSN | $193 | $1.72M | +0.1% | +8.8% | +25.2% | +45.5% | +27.3% | +46.9% | |
| Dec 19, 2024 | VRSN | $194 | $10.72M | +0.4% | +8.8% | +25.2% | +45.5% | +27.3% | +46.9% | |
| Dec 19, 2024 | VRSN | $194 | $368.5K | — | +8.8% | +25.2% | +45.5% | +27.3% | +46.9% | |
| Dec 19, 2024 | SIRI | $21 | $42.49M | +1.8% | +7.8% | +13.3% | +8.1% | +5.9% | +43.6% | |
| Dec 19, 2024 | SIRI | $22 | $674.1K | — | +7.8% | +13.3% | +8.1% | +5.9% | +43.6% | |
| Dec 19, 2024 | OXY | $46 | $153.59M | +1.3% | +11.4% | +6.3% | +1.7% | −10.7% | +28.6% | |
| Dec 19, 2024 | OXY | $46 | $11.19M | +0.1% | +11.4% | +6.3% | +1.7% | −10.7% | +28.6% | |
| Dec 18, 2024 | VRSN | $191 | $10.24M | +0.4% | +9.9% | +25.3% | +47.3% | +28.8% | +48.4% | |
| Dec 18, 2024 | VRSN | $193 | $496.1K | — | +9.9% | +25.3% | +47.3% | +28.8% | +48.4% | |
| Dec 18, 2024 | VRSN | $194 | $914.8K | — | +9.9% | +25.3% | +47.3% | +28.8% | +48.4% | |
| Dec 18, 2024 | VRSN | $195 | $3.7M | +0.1% | +9.9% | +25.3% | +47.3% | +28.8% | +48.4% | |
| Dec 18, 2024 | VRSN | $195 | $820.2K | — | +9.9% | +25.3% | +47.3% | +28.8% | +48.4% | |
| Dec 18, 2024 | SIRI | $22 | $20.09M | +0.8% | +3.2% | +6.3% | +2.2% | +3.6% | +37.3% | |
| Dec 18, 2024 | SIRI | $22 | $12.12M | +0.5% | +3.2% | +6.3% | +2.2% | +3.6% | +37.3% | |
| Dec 18, 2024 | OXY | $46 | $112.2M | +0.9% | +9.8% | +4.1% | −0.4% | −11.8% | +26.7% | |
| Dec 18, 2024 | OXY | $47 | $17.57M | +0.1% | +9.8% | +4.1% | −0.4% | −11.8% | +26.7% | |
| Dec 17, 2024 | VRSN | $195 | $1.2M | — | +7.4% | +22.2% | +45.9% | +25.6% | +45.6% | |
| Dec 17, 2024 | VRSN | $195 | $14.85M | +0.6% | +7.4% | +22.2% | +45.9% | +25.6% | +45.6% | |
| Dec 17, 2024 | VRSN | $196 | $156K | — | +7.4% | +22.2% | +45.9% | +25.6% | +45.6% | |
| Dec 17, 2024 | SIRI | $22 | $31.86M | +1.3% | −0.3% | +4.3% | −1.8% | +2.2% | +32.2% | |
| Dec 17, 2024 | OXY | $46 | $114.59M | +1.0% | +11.6% | +2.0% | −0.2% | −10.8% | +25.3% |
How this is calculated. We score only open-market purchases (SEC code
P) — the buys that carry real signal. Each trade's return is measured from the adjusted closing price on the purchase date to the latest close, accounting for stock splits and dividends. The 1M/3M/6M/12M columns show the same trade's return after each fixed holding period; a dash means that horizon hasn't elapsed yet or isn't priceable. Sales are excluded because insiders sell for many routine reasons. With only 60 scored trades, treat this as a small sample, not a verdict.
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Open-market buys
$995.72M
70 trades
Open-market sells
$5.94B
62 trades
Net flow
−$4.95B
Net selling
Total filings
145
transactions shown
Full transaction history
All Form 4 activity across every company, newest firstDVA
−$175.7K
1,256 sh @ $140
BRK.A
−$0
22 sh
BRK.A
−$0
1,304 sh
DVA
−$168.58M
1.15M sh @ $147
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BRK.A
−$0
160 sh
DVA
−$10.06M
65,482 sh @ $154
DVA
−$8.49M
54,979 sh @ $154
DVA
−$1.47M
9,477 sh @ $155
DVA
−$6.08M
39,531 sh @ $154
DVA
−$7.74M
50,016 sh @ $155
DVA
−$4.43M
28,515 sh @ $155
DVA
−$31.2K
200 sh @ $156
DVA
−$284.4K
1,800 sh @ $158
DVA
−$5.15M
34,132 sh @ $151
DVA
−$4.56M
30,075 sh @ $152
DVA
−$5.31M
34,789 sh @ $153
DVA
−$11.93M
77,665 sh @ $154
DVA
−$14.23M
91,987 sh @ $155
DVA
−$10.96M
70,460 sh @ $156
DVA
−$10.37M
66,208 sh @ $157
DVA
−$10.33M
65,483 sh @ $158
DVA
−$4.42M
27,901 sh @ $158
DVA
−$206.9K
1,300 sh @ $159
DVA
−$31.68M
203,091 sh @ $156
OXY
Berkshire Hathaway Inc, OXY's 10% owner, spent $35.72M of their own money on 763,017 shares at $47.
+$35.72M
763,017 sh @ $47
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $10.17M of their own money on 433,079 shares at $23.
+$10.17M
433,079 sh @ $23
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $6.83M of their own money on 283,899 shares at $24.
+$6.83M
283,899 sh @ $24
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $19.84M of their own money on 840,000 shares at $24, growing their stake 1%.
+$19.84M
840,000 sh @ $24
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $17.12M of their own money on 751,141 shares at $23, growing their stake 1%.
+$17.12M
751,141 sh @ $23
Frequently asked questions
How is BUFFETT WARREN E's win rate calculated?
We take every open-market purchase (SEC code P) we can match to a stock price, then compare the split- and dividend-adjusted price on the purchase date to the most recent close. The win rate is the share of those buys currently trading above the purchase price. Sales and share grants are not scored.
Why are some buys not included in the score?
A purchase is excluded if we can't price it — for example if the ticker is missing from the filing, the company has been delisted, or the security isn't a common stock we can match to market data. Excluded counts are shown next to the scored total.
What do the 1M / 3M / 6M / 12M columns mean?
They show each purchase's return after a fixed holding period — one, three, six, and twelve months from the buy date — using split- and dividend-adjusted prices. This separates good entry timing from simply holding a long-running winner. A dash means that horizon hasn't elapsed yet for that trade, or the stock couldn't be priced at that date.
Does a high win rate mean I should copy this insider?
No. Past performance does not predict future results, sample sizes are often small, and an insider's edge in their own company doesn't transfer to yours. This is context, not a recommendation. InsiderSource is not investment advice.
Where does this data come from?
Trades come from BUFFETT WARREN E's SEC Form 4 filings on EDGAR. Prices come from public market data and are split/dividend-adjusted. Always verify against the original filings before acting.