NSP
+$0
6,201 sh
MASTERSON ELLEN H
Director · SEC CIK 1045311Advertisement
Buy track record
How this insider's open-market purchases have performed25%
of buys now in profit
1 up · 3 down
Avg return since buy−4.9%
Median return−27.1%
Best trade+87.3%
Worst trade−52.9%
Buys scored4
Average return by holding period — separates good entry timing from riding one long winner
After 1 month
+17.6%
100% won · 4 trades
After 3 months
+20.2%
50% won · 4 trades
After 6 months
−25.9%
0% won · 3 trades
After 12 months
−20.4%
50% won · 2 trades
| Date | Company | 90d trend | Buy price | Value | ΔOwn | 1M | 3M | 6M | 12M | To date |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 11, 2026 | NSP | $20 | $23.9K | +6.1% | +40.0% | +92.8% | — | — | +87.3% | |
| Aug 4, 2025 | NSP | $45 | $22.2K | +2.5% | +16.5% | −22.4% | −13.1% | — | −18.4% | |
| Feb 12, 2025 | NSP | $86 | $150.5K | +12% | +3.1% | −18.3% | −40.1% | −68.2% | −52.9% | |
| Nov 5, 2019 | NSP | $71 | $7.1K | NEW | +10.8% | +28.7% | −24.4% | +27.3% | −35.8% |
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 4 scored trades, treat this as a small sample, not a verdict.
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Open-market buys
$203.7K
4 trades
Open-market sells
$11.8K
1 trades
Net flow
+$191.9K
Net buying
Total filings
28
transactions shown
Full transaction history
All Form 4 activity across every company, newest firstWHG
+$0
5,780 sh
NSP
Masterson Ellen H, NSP's Director, spent $23.9K of their own money on 1,200 shares at $20, growing their stake 6%.
+$23.9K
1,200 sh @ $20
NSP
Masterson Ellen H, NSP's Director, spent $22.2K of their own money on 490 shares at $45, growing their stake 3%.
+$22.2K
490 sh @ $45
NSP
+$0
2,678 sh
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WHG
+$0
5,690 sh
NSP
Masterson Ellen H, NSP's Director, spent $150.5K of their own money on 1,755 shares at $86, growing their stake 12%.
+$150.5K
1,755 sh @ $86
NSP
+$0
1,818 sh
WHG
+$0
7,547 sh
NSP
−$11.8K
100 sh @ $118
NSP
+$0
1,574 sh
WHG
+$0
7,917 sh
NSP
+$0
1,877 sh
WHG
+$0
5,898 sh
NSP
+$0
1,974 sh
WHG
+$0
5,609 sh
NSP
+$0
3,234 sh
WHG
+$0
3,727 sh
NSP
Masterson Ellen H, NSP's Director, spent $7.1K of their own money on 100 shares at $71, opening a brand-new position.
+$7.1K
100 sh @ $71
NSP
+$0
1,288 sh
WHG
+$0
2,578 sh
NSP
+$0
1,194 sh
WHG
+$0
1,622 sh
NSP
+$0
949 sh
WHG
+$0
1,661 sh
WHG
+$0
1,570 sh
WHG
+$0
1,484 sh
WHG
+$0
1,531 sh
Frequently asked questions
How is MASTERSON ELLEN H'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 MASTERSON ELLEN H'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.