MA
−$1.52M
3,201 sh @ $476
Miebach Michael
Director, President & CEO, President, Chief Product Officer · SEC CIK 1771933Advertisement
Buy track record
How this insider's open-market purchases have performed100%
of buys now in profit
1 up · 0 down
Avg return since buy+15.5%
Median return+15.5%
Best trade+15.5%
Worst trade+15.5%
Buys scored1
Average return by holding period — separates good entry timing from riding one long winner
After 1 month
+1.6%
100% won · 1 trade
After 3 months
+6.3%
100% won · 1 trade
After 6 months
—
not elapsed yet
After 12 months
—
not elapsed yet
| Date | Company | 90d trend | Buy price | Value | ΔOwn | 1M | 3M | 6M | 12M | To date |
|---|---|---|---|---|---|---|---|---|---|---|
| Feb 25, 2026 | IBM | $233 | $101.3K | NEW | +1.6% | +6.3% | — | — | +15.5% |
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 1 scored trade, treat this as a small sample, not a verdict.
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Open-market buys
$101.3K
1 trades
Open-market sells
$61.03M
41 trades
Net flow
−$60.92M
Net selling
Total filings
75
transactions shown
Full transaction history
All Form 4 activity across every company, newest firstMA
−$1.36M
2,850 sh @ $477
MA
−$2.16M
4,548 sh @ $476
MA
+$0
30,752 sh
MA
−$758.7K
1,595 sh @ $476
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+$881.7K
7,851 sh @ $112
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−$656.1K
1,402 sh @ $468
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−$610.1K
1,300 sh @ $469
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2,244 sh @ $470
MA
−$1.18M
2,505 sh @ $471
MA
−$188.8K
400 sh @ $472
MA
−$875.6K
2,485 sh @ $352
MA
+$0
3,275 sh
MA
+$1.92M
17,052 sh @ $112
MA
−$755.7K
2,021 sh @ $374
MA
−$1.09M
2,905 sh @ $375
MA
−$1.64M
4,368 sh @ $376
MA
−$1.39M
3,699 sh @ $377
MA
−$778.4K
2,059 sh @ $378
MA
−$568.5K
1,500 sh @ $379
MA
−$190.1K
500 sh @ $380
MA
+$0
8,792 sh
MA
+$730K
6,500 sh @ $112
MA
−$3.95M
10,670 sh @ $370
MA
−$100.9K
278 sh @ $363
MA
+$0
6,415 sh
MA
+$0
2,762 sh
MA
+$757.7K
8,410 sh @ $90
MA
−$2.92M
8,410 sh @ $347
MA
+$0
2,270 sh
Frequently asked questions
How is Miebach Michael'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 Miebach Michael'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.