Follow the Filings · Data · INBX · Form 4
SEC Form 4 · INBX · filed Sep 08, 2026

INBX: director bought $286,617 of Inhibrx Biosciences, Inc.

The filing shows 1 Table I transaction by a director of Inhibrx Biosciences, Inc.: bought $286,617. Source document and our reading of it are below; the SEC filing is the record, this page is the index.

Freshness

16:26:03SEC acceptance (ET) · Sep 08, 2026
18:00:57first seen by FTF (ET) · SEC current-filings feed
1 h 34 minacceptance → first seen

UTC: accepted 2026-09-08T20:26:03Z · seen 2026-09-08T22:00:57Z. Measured per filing; the distribution for every day is on coverage.

What the filing shows (Table I)

Trade dateCodeSharesPriceValueOwned after
Sep 08, 2026P · Open-market or private purchase2,500$114.65$286,617227,064
Reporting person
FORSYTH DOUGLAS · Director
Issuer
Inhibrx Biosciences, Inc. · CIK 2007919
Accession
0001240801-26-000004
Source
SEC filing index · complete submission
Rule 10b5-1
checkbox not captured by our parser yet — check the filing

Checks

Cluster buyPrice check: consistent

filing price is 1.00× the 2026-09-08 close (close $114.34 on 2026-09-08). Band: filing price within 0.4–2.5× of the last market close on or before the trade date; a filing outside the band is not published. Rows dropped by our data checks (duplicates, superseded amendments, impossible values, bulk program events, price outside the band) are excluded from every number on this page.

INBX insider flow — 30 days to this filing

$3,499,597open-market buys · 8 rows · 3 insiders
$0open-market sells · 0 rows · 0 insiders
+$3,499,597net open-market flow
Cluster buy — 3 distinct insiders, $3,499,597 of open-market purchases between Sep 08, 2026 and Sep 08, 2026.
Definition: 3 or more distinct insiders reported open-market purchases within a 10-trading-day window, and the net open-market flow over the whole period shown is positive. The label is data, not a judgement.
FiledReporting personCodesRowsBuysSellsFiling
Sep 08, 2026FORSYTH DOUGLAS · DirectorP1$286,6170001240801-26-000004 (this filing)
Sep 08, 2026Lappe Mark · Chief Executive OfficerP6$2,645,3990001366074-26-000002
Sep 08, 2026Kayyem Jon Faiz · DirectorP1$567,5800001366268-26-000004

Reading

The most ordinary reading of several insiders buying in the same window is directors and officers adding to holdings in an open trading window, often after results are public. Form 4 does not state a reason, and this page does not infer one.

Scope: SEC Form 4, Table I (non-derivative) only — Table II (options, RSUs) is not shown; on multi-owner filings the first reporting owner; Senate PTRs are covered, House is not. Every filing is reconciled daily against EDGAR's own index — see coverage.
Generated 2026-09-08 22:04 UTC from our reconciled ledger. Amended filings (Form 4/A) replace this page with a notice, they do not delete it. Found an error? [email protected].