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144 ·Filed Sep 14, 2026

INBX

Inhibrx Biosciences, Inc.
NEUTRAL
Impact 2/10
Horizonimmediate Processed1mo ago SEC0001959173-26-006953
Form 144 — notice of proposed sale of securities
Actionable Insight • Neutral

This is a routine, de minimis insider sale by a director. No trading action warranted. Monitor for any larger insider sales or cluster filings that could signal a change in sentiment.

DirectionNeutral
Confidencehigh
Horizonimmediate
Latest settled — T+20d ⚠ clustered
INBX ▼ -17.55% at T+20d
NEUTRAL call -17.55% · α vs SPY -20.52% · entry $105.61 → $87.08
Next anchor: T+60d in 6w
Latest observation: T+28 -17.51% FF3 residual α
Entry = T+0 close
Sep 14, 2026
via day close
T+1d
-2.76%
call -2.76% · α -3.09%
$102.69
settled 6w ago
T+5d
+3.54%
call +3.54% · α +2.72%
$109.35
settled 5w ago
T+20d
-17.55%
call -17.55% · α -20.52%
$87.08
settled 15d ago
T+60d
Pending
in 6w

Price Chart

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Executive Summary

Director Kimberly Manhard filed a Form 144 notice to sell 500 shares of Inhibrx Biosciences common stock, with an approximate market value of $55,130. The shares were acquired via open-market purchase in August 2024 and are held in a revocable trust. The proposed sale is very small relative to the director's total holdings and the company's $1.6B market cap, making it a routine portfolio adjustment with no material signal.

Key Facts

  • Director Kimberly Manhard filed Form 144 to sell 500 shares of INBX common stock.
  • Estimated value of the proposed sale is approximately $55,130.
  • Shares were acquired via open-market purchase on 08/28/2024.
  • Shares are held in the Kimberly Joan Manhard Revocable Trust.
  • The sale represents a tiny fraction of the director's total holdings and the company's $1.6B market cap.

Financial Impact

Proposed sale of 500 shares valued at approximately $55,130 — negligible relative to $1.6B market cap.

dilution

Risk Factors

  • Insider selling could accelerate if additional Form 144 filings appear at higher volume.
  • No other material risks from this isolated filing.

Market Snapshot

Exchange
Nasdaq
Sector
Biological Products, (No Diagnostic Substances)
Analyst Consensus
80% bullish (10 analysts)

Investment Themes

Documents Analyzed

This report is based on 2 SEC documents filed with EDGAR.

DocumentAccession Number
144 Filing (Primary)0001959173-26-006953
Document: 0001959173-26-006953.txt0001959173-26-006953
18 reports for INBX
Performance horizon
50% Hit rate @ T+60 2 of 4 directional calls Went positive at some point 6 of 12 best @ T+60▲ +29.54%Jun 11, 2026
Filters
Rows
Reports for INBX — sortable, filterable
TypeNow
Oct 14, 2026
12d ago
Insider Buy
BULLISH ★ 4/10
$90.50awaiting T+60—$95.66 (+5.70%)
Sep 28, 2026
28d ago
Insider Cluster
BULLISH ★ 5/10
$104.83awaiting T+60—$95.66 (−8.75%)
Sep 17, 2026
5w ago
Insider Cluster
BULLISH ★ 5/10
$109.35awaiting T+60—$95.66 (−12.52%)
Sep 15, 2026
5w ago
Insider Cluster
NEUTRAL ★ 4/10
$101.77awaiting T+60—$95.66 (−6.00%)
Sep 15, 2026
6w ago
144
NEUTRAL ★ 2/10
$101.77awaiting T+60—$95.66 (−6.00%)
Sep 14, 2026
6w ago
144
NEUTRAL ★ 2/10
$105.61awaiting T+60—$95.66 (−9.42%)
Sep 11, 2026
6w ago
144
NEUTRAL ★ 2/10
$109.27awaiting T+60—$95.66 (−12.46%)
Sep 10, 2026
6w ago
Insider Cluster
BULLISH ★ 7/10
$109.27awaiting T+60—$95.66 (−12.46%)
Sep 8, 2026
7w ago
Insider Cluster
BULLISH ★ 6/10
$112.86awaiting T+60—$95.66 (−15.24%)
Sep 8, 2026
7w ago
Insider Buy
BULLISH ★ 6/10
$112.86awaiting T+60—$95.66 (−15.24%)
Showing 10 of 18

US Market Status

Market Closed — Opens Wed (16h 25m)

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Report published Sep 14, 2026