PHAT insider buying
2 cluster buysPhathom Pharmaceuticals, Inc. · Healthcare
When two or more insiders at Phathom Pharmaceuticals, Inc. buy PHAT 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 PHAT 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
- Mar 13 – May 21, 2025Detected May 21, 20253 insidersTotal bought$214.7KMarket cap$903.9M
- Dec 13 – Dec 13, 2024Detected Dec 13, 20242 insidersTotal bought$180.3KMarket cap$903.9M
All notable open-market buys in PHAT
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 |
|---|---|---|---|---|---|
| May 21, 2025 | Topper James Ncluster Director | 3,780 | $3.86 | $14.6K | SEC ↗ |
| May 14, 2025 | Topper James Ncluster Director | 6,300 | $3.32 | $20.9K | SEC ↗ |
| May 13, 2025 | Topper James Ncluster Director | 1,120 | $3.16 | $3.5K | SEC ↗ |
| May 9, 2025 | Topper James Ncluster Director | 33,376 | $3.19 | $106.5K | SEC ↗ |
| May 7, 2025 | Parikh Asitcluster Director | 5,000 | $2.40 | $12.0K | SEC ↗ |
| May 6, 2025 | Parikh Asitcluster Director | 5,000 | $2.60 | $13.0K | SEC ↗ |
| Mar 13, 2025 | Parikh Asitcluster Director | 10,000 | $4.42 | $44.2K | SEC ↗ |
| Dec 13, 2024 | KARBE FRANKcluster Director | 12,500 | $7.93 | $99.1K | SEC ↗ |
| Dec 13, 2024 | Parikh Asitcluster Director | 10,000 | $8.12 | $81.2K | SEC ↗ |
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PHAT insider buying — FAQ
- Are insiders buying PHAT stock?
- Yes — 4 distinct insiders have bought PHAT (Phathom Pharmaceuticals, Inc.) on the open market, including 2 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was May 23, 2025.
- How much PHAT stock have insiders bought?
- Insiders have bought a combined $395.0K of PHAT across 9 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in PHAT?
- A cluster buy is two or more distinct Phathom Pharmaceuticals, Inc. insiders — officers, directors, or 10% owners — each buying PHAT on the open market within a rolling window. PHAT has 2 detected cluster buys to date.
- Where does this PHAT 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 PHAT
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 PHAT 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 PHAT.