VRSN
Berkshire Hathaway Inc, VRSN's 10% owner, spent $1.72M of their own money on 8,936 shares at $193.
+$1.72M
8,936 sh @ $193
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 firstVRSN
Berkshire Hathaway Inc, VRSN's 10% owner, spent $10.72M of their own money on 55,367 shares at $194.
+$10.72M
55,367 sh @ $194
VRSN
Berkshire Hathaway Inc, VRSN's 10% owner, spent $368.5K of their own money on 1,897 shares at $194.
+$368.5K
1,897 sh @ $194
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $42.49M of their own money on 2.04M shares at $21, growing their stake 2%.
+$42.49M
2.04M sh @ $21
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $674.1K of their own money on 31,326 shares at $22.
+$674.1K
31,326 sh @ $22
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OXY
Berkshire Hathaway Inc, OXY's 10% owner, spent $153.59M of their own money on 3.37M shares at $46, growing their stake 1%.
+$153.59M
3.37M sh @ $46
OXY
Berkshire Hathaway Inc, OXY's 10% owner, spent $11.19M of their own money on 241,706 shares at $46.
+$11.19M
241,706 sh @ $46
VRSN
Berkshire Hathaway Inc, VRSN's 10% owner, spent $10.24M of their own money on 53,503 shares at $191.
+$10.24M
53,503 sh @ $191
VRSN
Berkshire Hathaway Inc, VRSN's 10% owner, spent $496.1K of their own money on 2,573 shares at $193.
+$496.1K
2,573 sh @ $193
VRSN
Berkshire Hathaway Inc, VRSN's 10% owner, spent $914.8K of their own money on 4,724 shares at $194.
+$914.8K
4,724 sh @ $194
VRSN
Berkshire Hathaway Inc, VRSN's 10% owner, spent $3.7M of their own money on 19,004 shares at $195.
+$3.7M
19,004 sh @ $195
VRSN
Berkshire Hathaway Inc, VRSN's 10% owner, spent $820.2K of their own money on 4,196 shares at $195.
+$820.2K
4,196 sh @ $195
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $20.09M of their own money on 915,527 shares at $22, growing their stake 1%.
+$20.09M
915,527 sh @ $22
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $12.12M of their own money on 538,940 shares at $22.
+$12.12M
538,940 sh @ $22
OXY
Berkshire Hathaway Inc, OXY's 10% owner, spent $112.2M of their own money on 2.43M shares at $46, growing their stake 1%.
+$112.2M
2.43M sh @ $46
OXY
Berkshire Hathaway Inc, OXY's 10% owner, spent $17.57M of their own money on 374,589 shares at $47.
+$17.57M
374,589 sh @ $47
VRSN
Berkshire Hathaway Inc, VRSN's 10% owner, spent $1.2M of their own money on 6,160 shares at $195.
+$1.2M
6,160 sh @ $195
VRSN
Berkshire Hathaway Inc, VRSN's 10% owner, spent $14.85M of their own money on 76,056 shares at $195, growing their stake 1%.
+$14.85M
76,056 sh @ $195
VRSN
Berkshire Hathaway Inc, VRSN's 10% owner, spent $156K of their own money on 796 shares at $196.
+$156K
796 sh @ $196
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $31.86M of their own money on 1.44M shares at $22, growing their stake 1%.
+$31.86M
1.44M sh @ $22
OXY
Berkshire Hathaway Inc, OXY's 10% owner, spent $114.59M of their own money on 2.48M shares at $46, growing their stake 1%.
+$114.59M
2.48M sh @ $46
BRK.A
−$0
6,382 sh
BRK.A
+$0
6,000 sh
BRK.A
−$0
300,000 sh
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $18.06M of their own money on 679,207 shares at $27, growing their stake 1%.
+$18.06M
679,207 sh @ $27
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $25.39M of their own money on 925,205 shares at $27, growing their stake 1%.
+$25.39M
925,205 sh @ $27
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $17.24M of their own money on 623,527 shares at $28, growing their stake 1%.
+$17.24M
623,527 sh @ $28
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $4.82M of their own money on 175,569 shares at $27.
+$4.82M
175,569 sh @ $27
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $28.09M of their own money on 1.04M shares at $27, growing their stake 1%.
+$28.09M
1.04M sh @ $27
SIRI
Berkshire Hathaway Inc, SIRI's 10% owner, spent $9.23M of their own money on 342,133 shares at $27.
+$9.23M
342,133 sh @ $27
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.