SNDX
+$0
312,085 sh
MPM BioVentures IV QP LP
10% Owner · SEC CIK 1358309Advertisement
Buy track record
How this insider's open-market purchases have performed0%
of buys now in profit
0 up · 3 down
Avg return since buy−32.2%
Median return−46.8%
Best trade−2.9%
Worst trade−46.8%
Buys scored3 (+16 n/a)
Average return by holding period — separates good entry timing from riding one long winner
After 1 month
+0.0%
0% won · 3 trades
After 3 months
+0.0%
0% won · 3 trades
After 6 months
+0.0%
0% won · 3 trades
After 12 months
+0.0%
0% won · 3 trades
| Date | Company | 90d trend | Buy price | Value | ΔOwn | 1M | 3M | 6M | 12M | To date |
|---|---|---|---|---|---|---|---|---|---|---|
| Feb 8, 2012 | PCRX | $7 | $1.87M | +10% | +0.0% | +0.0% | +0.0% | +0.0% | −46.8% | |
| Nov 21, 2011 | PCRX | $7 | $3M | +16% | +0.0% | +0.0% | +0.0% | +0.0% | −46.8% | |
| Dec 18, 2006 | MEMY | $1 | $2.57M | +26% | +0.0% | +0.0% | +0.0% | +0.0% | −2.9% |
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
$9.53M
19 trades
Open-market sells
$27.79M
5 trades
Net flow
−$18.26M
Net selling
Total filings
34
transactions shown
Full transaction history
All Form 4 activity across every company, newest firstCHMA
+$0
1.42M sh
TRIV
+$0
253,066 sh
EPZM
−$13.65M
466,666 sh @ $29
CNAT
+$0
1.01M sh
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CNAT
+$183.9K
16,716 sh @ $11
CNAT
Mpm Bioventures Iv Qp Lp, CNAT's 10% owner, spent $1.82M of their own money on 165,265 shares at $11, growing their stake 16%.
+$1.82M
165,265 sh @ $11
EPZM
+$0
392,156 sh
PCRX
Mpm Bioventures Iv Qp Lp sold $13.93M of PCRX, trimming their stake 15%.
−$13.93M
500,000 sh @ $28
PCRX
+$0
712,567 sh
PCRX
Mpm Bioventures Iv Qp Lp, PCRX's 10% owner, spent $1.87M of their own money on 267,857 shares at $7, growing their stake 10%.
+$1.87M
267,857 sh @ $7
PCRX
Mpm Bioventures Iv Qp Lp, PCRX's 10% owner, spent $3M of their own money on 461,538 shares at $7, growing their stake 16%.
+$3M
461,538 sh @ $7
PLIN
−$0
3.42M sh
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $10.2K of their own money on 1,249 shares at $8.
+$10.2K
1,249 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $8K of their own money on 999 shares at $8.
+$8K
999 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $8K of their own money on 999 shares at $8.
+$8K
999 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $20.7K of their own money on 2,648 shares at $8.
+$20.7K
2,648 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $7.6K of their own money on 948 shares at $8.
+$7.6K
948 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $6.1K of their own money on 730 shares at $8.
+$6.1K
730 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $48.2K of their own money on 6,029 shares at $8.
+$48.2K
6,029 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $10.2K of their own money on 1,249 shares at $8.
+$10.2K
1,249 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $10.7K of their own money on 1,334 shares at $8.
+$10.7K
1,334 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $7.5K of their own money on 932 shares at $8.
+$7.5K
932 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $378 of their own money on 45 shares at $8.
+$378
45 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $7.4K of their own money on 899 shares at $8.
+$7.4K
899 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $60.2K of their own money on 7,340 shares at $8.
+$60.2K
7,340 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $12.5K of their own money on 1,598 shares at $8.
+$12.5K
1,598 sh @ $8
PLIN
Mpm Bioventures Iv Qp Lp, PLIN's 10% owner, spent $48.6K of their own money on 6,911 shares at $7.
+$48.6K
6,911 sh @ $7
MEMY
−$8.62M
14.14M sh @ $1
MEMY
−$58K
27,600 sh @ $2
Frequently asked questions
How is MPM BioVentures IV QP LP'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 MPM BioVentures IV QP LP'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.