Reporting owner · CIK 0001366074
Lappe Mark
Visual SEC Form 4 history across 1 companies, 6 transactions and 1 filings.
CEOChief Executive OfficerInhibrx Biosciences, Inc.
Open-market mix
100%buys
Open-market buy performance
90-day forward return on this insider's open-market purchases
Forward return is not available yet
We compute this from each buy's stock performance 90 days after the transaction. The price history is still being populated for some of their open-market buys, so the average and median will appear here once the daily price refresh has covered the relevant trading days.
Monthly open-market activity
Reported purchase and sale transaction counts
Buys Sells
Net value flow
Buys minus sells
Sep 26
$2.6M
Transaction texture
Ownership and ticket size
Average P/S size$440.9K
Median P/S size$360.9K
Direct0
Indirect6
Sep 08, 2026buy
Filing-only signals
Deterministic matches in this insider's history
No filing-only signal badges matched this history.
Latest Form 4 facts
Quick context from source filings
Latest transaction
buy at Inhibrx Biosciences, Inc. on Sep 08, 2026 valued at $1,087,001.
Review SEC filingLatest sale
No open-market insider sale is available.
Associated companies
Visual map of known reporting history
| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| INBX | Lappe Mark | CEO | buy | 9.68k | $108M | P | — | 09/08 | 09/08 | |
| INBX | Lappe Mark | CEO | buy | 1.21k | $13.6M | P | — | 09/08 | 09/08 | |
| INBX | Lappe Mark | CEO | buy | 500 | $5.41M | P | — | 09/08 | 09/08 | |
| INBX | Lappe Mark | CEO | buy | 1.10k | $11.7M | P | — | 09/08 | 09/08 | |
| INBX | Lappe Mark | CEO | buy | 6.60k | $66.4M | P | — | 09/08 | 09/08 | |
| INBX | Lappe Mark | CEO | buy | 5.89k | $58.5M | P | — | 09/08 | 09/08 |
Lappe Mark Insider Activity FAQ
SEC Form 4 context
Who is Lappe Mark?
Lappe Mark is a reporting owner in SEC Form 4 filings with reporting owner CIK 0001366074.
Which companies has Lappe Mark reported transactions for?
Inhibrx Biosciences, Inc.
When was Lappe Mark's latest insider buy?
buy at Inhibrx Biosciences, Inc. on Sep 08, 2026 valued at $1,087,001.
When was Lappe Mark's latest insider sale?
No open-market insider sale is available for this period.
Where can I see the original SEC filings?
Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.
Are performance metrics included?
This version does not calculate win rates, forward returns, benchmark-adjusted returns, or high-conviction scores.