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INSIDER PROFILE · SE
Sebastian Siemiatkowski
Styrelseordförande
Profile key: se|sebastian siemiatkowski
Purchase history
- Companies traded
- 1
- Purchases · 12M
- 5
- Purchases · 24M
- 5
- Average purchase
- SEK 1,601,316,384
- Gross purchase value
- SEK 8,006,581,920
- Last purchase
- 2026-02-17
- Completed 20D events
- 3.0
- Outcome status
- INSUFFICIENT_SAMPLE
Latest company: Flat Capital AB (publ)
Companies: Flat Capital AB (publ)
Post-purchase outcomes
Benchmark-relative outcomes are available against OMX Stockholm 30.
- Excess return = stock return − OMX Stockholm 30 return over the same period.
- Hit rate = positive excess-return events ÷ completed events.
- Price coverage = valid point-in-time prices ÷ events mature enough for that period.
- Returns start on the first shared trading session on or after publication.
| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 3Small sample | 100.0% (3/3) | 0.0% (0/3) | -3.9% | -8.0% | -16.7% |
| 20D | 3Small sample | 100.0% (3/3) | 33.3% (1/3) | -15.3% | -11.6% | -19.9% |
| 60D | 3Small sample | 100.0% (3/3) | 33.3% (1/3) | -42.2% | -27.0% | -45.3% |
| 120D | 3Small sample | 100.0% (3/3) | 33.3% (1/3) | -63.5% | -40.5% | -65.0% |
Research patterns
- First purchase in 12M
- 1/3
- Large purchase ≥ €100k
- 3/3
- Cluster buying · 15D
- 0/3
- Buying the dip · ≥20% below prior 52W high
- 3/3
- Routine / opportunistic
- Not classifiable
Counts are profile-wide, point-in-time research labels. They never affect the insider score or ranking.
Every completed outcome is shown; n<5 is descriptive small-sample evidence and is not scored. Disclosure-level observations published on the same date may share a return path and may not be statistically independent. These results never affect the insider score or ranking.