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INSIDER PROFILE · FI
Mattias Björk
Member of the Board/Deputy member
Profile key: fi|mattias björk
Purchase history
- Companies traded
- 1
- Purchases · 12M
- 1
- Purchases · 24M
- 34
- Average purchase
- €3,284
- Gross purchase value
- €111,648
- Last purchase
- 2026-04-30
- Completed 20D events
- 3.0
- Outcome status
- INSUFFICIENT_SAMPLE
Latest company: Boreo Oyj
Companies: Boreo Oyj
Post-purchase outcomes
Benchmark-relative outcomes are available against OMX Helsinki 25.
- Excess return = stock return − OMX Helsinki 25 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) | 33.3% (1/3) | -1.0% | +3.3% | -2.8% |
| 20D | 3Small sample | 100.0% (3/3) | 33.3% (1/3) | -4.6% | -2.4% | -7.3% |
| 60D | 3Small sample | 100.0% (3/3) | 33.3% (1/3) | -6.9% | -4.7% | -21.6% |
| 120D | 2Small sample | 100.0% (2/2) | 0.0% (0/2) | -26.9% | -26.9% | -38.3% |
Research patterns
- First purchase in 12M
- 0/2
- Large purchase ≥ €100k
- 0/3
- Cluster buying · 15D
- 0/3
- Buying the dip · ≥20% below prior 52W high
- 2/3
- 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.