RBRK
+$0
3,709 sh
MCLAUGHLIN MARK D
Director · SEC CIK 1309507Advertisement
Buy track record
How this insider's open-market purchases have performed100%
of buys now in profit
3 up · 0 down
Avg return since buy+43.3%
Median return+40.8%
Best trade+49.6%
Worst trade+39.4%
Buys scored3
Average return by holding period — separates good entry timing from riding one long winner
After 1 month
+5.5%
67% won · 3 trades
After 3 months
−13.0%
0% won · 2 trades
After 6 months
−11.3%
50% won · 2 trades
After 12 months
−12.1%
0% won · 2 trades
| Date | Company | 90d trend | Buy price | Value | ΔOwn | 1M | 3M | 6M | 12M | To date |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 30, 2026 | RBRK | $47 | $502.2K | +354% | +16.7% | — | — | — | +49.6% | |
| Mar 6, 2024 | SNOW | $165 | $501.3K | +35% | −7.3% | −20.9% | −35.0% | −6.5% | +39.4% | |
| May 31, 2023 | SNOW | $164 | $299.9K | +27% | +7.0% | −5.1% | +12.5% | −17.6% | +40.8% |
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 3 scored trades, treat this as a small sample, not a verdict.
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Open-market buys
$1.3M
3 trades
Open-market sells
$12.44M
17 trades
Net flow
−$11.14M
Net selling
Total filings
49
transactions shown
Full transaction history
All Form 4 activity across every company, newest firstQCOM
+$0
538 sh
RBRK
Mclaughlin Mark D, RBRK's Director, spent $502.2K of their own money on 10,638 shares at $47, growing their stake 354%.
+$502.2K
10,638 sh @ $47
QCOM
+$0
2,563 sh
QCOM
+$0
2,355 sh
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QCOM
−$103K
759 sh @ $136
RBRK
+$0
146 sh
QCOM
+$0
401 sh
QCOM
−$36.8K
215 sh @ $171
QCOM
+$0
428 sh
SNOW
+$0
1,373 sh
QCOM
+$0
455 sh
QCOM
−$29.6K
186 sh @ $159
RBRK
+$0
2,702 sh
QCOM
+$0
451 sh
QCOM
+$0
2,097 sh
QCOM
+$0
1,901 sh
RBRK
+$0
153 sh
SNOW
+$0
2,292 sh
QCOM
−$32.9K
165 sh @ $199
QCOM
−$30.3K
179 sh @ $169
QCOM
+$0
2,056 sh
QCOM
−$113.1K
663 sh @ $171
SNOW
Mclaughlin Mark D, SNOW's Director, spent $501.3K of their own money on 3,030 shares at $165, growing their stake 35%.
+$501.3K
3,030 sh @ $165
SNOW
Mclaughlin Mark D, SNOW's Director, spent $299.9K of their own money on 1,831 shares at $164, growing their stake 27%.
+$299.9K
1,831 sh @ $164
SNOW
+$0
6,826 sh
QCOM
+$0
3,316 sh
QCOM
+$0
625 sh
PANW
−$224.1K
1,350 sh @ $166
QCOM
+$0
608 sh
Frequently asked questions
How is MCLAUGHLIN MARK D'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 MCLAUGHLIN MARK D'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.