LBRX insider buying
1 cluster buyLB PHARMACEUTICALS INC · Healthcare
When two or more insiders at LB PHARMACEUTICALS INC buy LBRX on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in LBRX plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.
Detected clusters
- Sep 12 – Sep 12, 2025Detected Sep 12, 20254 insidersTotal bought$75.0MMarket cap$914.5M
All notable open-market buys in LBRX
Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Sep 12, 2025 | Deep Track Capital, LPcluster 10% Owner | 2,000,000 | $15.00 | $30.0M | SEC ↗ |
| Sep 12, 2025 | 10% Owner | 1,000,000 | $15.00 | $15.0M | SEC ↗ |
| Sep 12, 2025 | Nussbaum Rancluster Director | 1,000,000 | $15.00 | $15.0M | SEC ↗ |
| Sep 12, 2025 | Deep Track Capital, LPcluster 10% Owner | 666,666 | $15.00 | $10.0M | SEC ↗ |
| Sep 12, 2025 | Vida Ventures GP III, L.L.C.cluster 10% Owner | 332,566 | $15.00 | $5.0M | SEC ↗ |
More Healthcare stocks with insider cluster buys
LBRX insider buying — FAQ
- Are insiders buying LBRX stock?
- Yes — 4 distinct insiders have bought LBRX (LB PHARMACEUTICALS INC) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was Sep 16, 2025.
- How much LBRX stock have insiders bought?
- Insiders have bought a combined $75.0M of LBRX across 5 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in LBRX?
- A cluster buy is two or more distinct LB PHARMACEUTICALS INC insiders — officers, directors, or 10% owners — each buying LBRX on the open market within a rolling window. LBRX has 1 detected cluster buy to date.
- Where does this LBRX insider trading data come from?
- Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.
How we track insider buying in LBRX
We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy LBRX within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding LBRX.