DMAC
Stahlberg Jan, DMAC's 10% owner, spent $626.8K of their own money on 73,099 shares at $9, growing their stake 1%.
+$626.8K
73,099 sh @ $9
STAHLBERG JAN
10% Owner · SEC CIK 1983161
Insider at
DMAC DiaMedica Therapeutics Inc.
Advertisement
Buy track record
How this insider's open-market purchases have performed11%
of buys now in profit
2 up · 16 down
Avg return since buy−6.7%
Median return−6.4%
Best trade+91.5%
Worst trade−37.4%
Buys scored18
Average return by holding period — separates good entry timing from riding one long winner
After 1 month
+15.3%
94% won · 18 trades
After 3 months
+22.1%
83% won · 18 trades
After 6 months
+19.8%
61% won · 18 trades
After 12 months
+32.2%
100% won · 1 trade
| Date | Company | 90d trend | Buy price | Value | ΔOwn | 1M | 3M | 6M | 12M | To date |
|---|---|---|---|---|---|---|---|---|---|---|
| Nov 25, 2025 | DMAC | $9 | $626.8K | +0.8% | −8.9% | −5.9% | −30.0% | — | −37.4% | |
| Nov 24, 2025 | DMAC | $8 | $317.7K | +0.5% | +5.9% | +6.9% | −21.0% | — | −29.4% | |
| Nov 21, 2025 | DMAC | $7 | $1.55M | +2.5% | +10.6% | +8.9% | −24.4% | — | −26.0% | |
| Nov 20, 2025 | DMAC | $7 | $951.2K | +1.5% | +16.9% | +16.6% | −20.8% | — | −21.7% | |
| Nov 19, 2025 | DMAC | $7 | $1.73M | +3.0% | +16.2% | +16.4% | −23.7% | — | −22.6% | |
| Nov 18, 2025 | DMAC | $7 | $1.23M | +2.3% | +20.4% | +24.9% | −17.7% | — | −18.1% | |
| Nov 17, 2025 | DMAC | $7 | $1.22M | +2.4% | +28.1% | +35.7% | −11.4% | — | −11.9% | |
| Aug 27, 2025 | DMAC | $6 | $304.6K | +0.7% | +15.6% | +44.3% | +32.9% | — | −5.5% | |
| Aug 26, 2025 | DMAC | $6 | $357.9K | +0.8% | +14.8% | +50.9% | +36.1% | — | −6.5% | |
| Aug 25, 2025 | DMAC | $6 | $2.03M | +4.6% | +14.0% | +50.5% | +41.7% | — | −5.8% | |
| Aug 22, 2025 | DMAC | $6 | $356.6K | +0.8% | +14.2% | +30.9% | +36.0% | — | −7.5% | |
| Aug 21, 2025 | DMAC | $6 | $287K | +0.7% | +17.7% | +28.7% | +40.1% | — | −4.7% | |
| Aug 20, 2025 | DMAC | $6 | $416.5K | +1.0% | +16.3% | +20.3% | +40.3% | — | −5.8% | |
| Aug 15, 2025 | DMAC | $6 | $49.4K | +0.1% | +16.3% | +6.3% | +44.3% | — | −6.3% | |
| Aug 14, 2025 | DMAC | $6 | $421.9K | +1.0% | +16.6% | −1.3% | +44.8% | — | −6.0% | |
| Aug 13, 2025 | DMAC | $6 | $1.73M | +4.3% | +16.8% | −9.7% | +42.2% | — | −5.8% | |
| Jul 23, 2025 | DMAC | $4 | $5.4M | +30% | +16.5% | +31.3% | +65.2% | — | +9.7% | |
| Jun 28, 2024 | DMAC | $3 | $3M | +30% | +27.1% | +42.0% | +81.0% | +32.2% | +91.5% |
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 18 scored trades, treat this as a small sample, not a verdict.
Advertisement
Open-market buys
$21.99M
18 trades
Open-market sells
$0
0 trades
Net flow
+$21.99M
Net buying
Total filings
18
transactions shown
Full transaction history
All Form 4 activity across every company, newest firstDMAC
Stahlberg Jan, DMAC's 10% owner, spent $317.7K of their own money on 40,253 shares at $8.
+$317.7K
40,253 sh @ $8
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $1.55M of their own money on 208,872 shares at $7, growing their stake 2%.
+$1.55M
208,872 sh @ $7
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $951.2K of their own money on 128,426 shares at $7, growing their stake 2%.
+$951.2K
128,426 sh @ $7
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $1.73M of their own money on 240,352 shares at $7, growing their stake 3%.
+$1.73M
240,352 sh @ $7
Advertisement
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $1.23M of their own money on 182,882 shares at $7, growing their stake 2%.
+$1.23M
182,882 sh @ $7
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $1.22M of their own money on 187,393 shares at $7, growing their stake 2%.
+$1.22M
187,393 sh @ $7
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $304.6K of their own money on 50,772 shares at $6, growing their stake 1%.
+$304.6K
50,772 sh @ $6
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $357.9K of their own money on 59,648 shares at $6, growing their stake 1%.
+$357.9K
59,648 sh @ $6
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $2.03M of their own money on 338,265 shares at $6, growing their stake 5%.
+$2.03M
338,265 sh @ $6
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $356.6K of their own money on 59,788 shares at $6, growing their stake 1%.
+$356.6K
59,788 sh @ $6
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $287K of their own money on 48,172 shares at $6, growing their stake 1%.
+$287K
48,172 sh @ $6
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $416.5K of their own money on 71,107 shares at $6, growing their stake 1%.
+$416.5K
71,107 sh @ $6
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $49.4K of their own money on 8,233 shares at $6.
+$49.4K
8,233 sh @ $6
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $421.9K of their own money on 70,414 shares at $6, growing their stake 1%.
+$421.9K
70,414 sh @ $6
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $1.73M of their own money on 293,601 shares at $6, growing their stake 4%.
+$1.73M
293,601 sh @ $6
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $5.4M of their own money on 1.54M shares at $4, growing their stake 30%.
+$5.4M
1.54M sh @ $4
DMAC
Stahlberg Jan, DMAC's 10% owner, spent $3M of their own money on 1.2M shares at $3, growing their stake 30%.
+$3M
1.2M sh @ $3
Frequently asked questions
How is STAHLBERG JAN'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 STAHLBERG JAN'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.