NNBXF Nanobiotix S.A.

BEARISH Impact: 7/10 6-K
Horizon weeks Filed May 20, 2026 Processed 23d 15h ago SEC 0001140361-26-022262
Notable filing: 6-K

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Executive Summary

Nanobiotix filed a 6-K concurrently with a massive ~155% dilutive offering (75M shares/ADSs/pre-funded warrants via 424B5). The filing provides a business update including promising but early (n=7) Phase 2 CONVERGE data in NSCLC with 85.7% ORR, a NANORAY-312 protocol amendment eliminating the interim analysis and accelerating the final readout, and Curadigm preclinical updates. The dominant event is the offering's substantial dilution, which overwhelms the positive clinical signals.

Actionable Insight

The offering's overwhelming dilution is the primary signal. Monitor the offering price and final share count on the F-3/424B5. Clinical data is encouraging but preliminary (n=7) and cannot offset the capital structure damage. Avoid catching a falling knife until dilution clears and a post-offering price floor establishes.

Key Facts

  • Filed concurrently with 424B5 offering of up to 75,000,000 ordinary shares/ADSs/pre-funded warrants (~155% dilution of current shares outstanding)
  • CONVERGE Phase 2 NSCLC data (n=7): 85.7% ORR, 57.1% CRR, 100% DCR post-chemoradiation + durvalumab
  • NANORAY-312 protocol amendment eliminates interim analysis (283 events), final analysis now at 335 events with 92% power
  • Up to ~$200 million in aggregate J&J milestone payments eligible over next few years across H&N and lung programs
  • Curadigm platform: early-stage preclinical data, IND readiness package underway

Financial Impact

Massive dilution: offering of up to 75M shares at undisclosed price, representing ~155% of current shares outstanding. Proceeds will fund pipeline acceleration but greatly exceed existing market cap.

dilutionshare count

Risk Factors

  • Catastrophic dilution from 75M share offering overwhelms any positive clinical catalyst in the near term
  • Pre-revenue stage with no approved products; cash burn remains high
  • Early clinical data (n=7) may not replicate in larger randomized Part 2 of CONVERGE
  • J&J milestone payments are contingent on development/regulatory events that may not occur on schedule

Market Snapshot

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Pharmaceutical Preparations

Documents Analyzed

This report is based on 4 SEC documents filed with EDGAR.

DocumentAccession Number
6-K Filing (Primary)0001140361-26-022262
Document: 0001140361-26-022262-index-headers.html0001140361-26-022262
Document: 0001140361-26-022262-index.html0001140361-26-022262
Document: 0001140361-26-022262.txt0001140361-26-022262
10 reports for NNBXF
Performance horizon
Filters
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Reports for NNBXF — sortable, filterable
Type Now
Jun 5, 2026
7d ago
6-K
NEUTRAL ★ 2/10
awaiting T+20
Jun 2, 2026
10d ago
6-K
NEUTRAL ★ 3/10
awaiting T+20
May 26, 2026
17d ago
6-K
BEARISH ★ 5/10
awaiting T+20
May 26, 2026
17d ago
6-K
MIXED ★ 6/10
awaiting T+20
May 22, 2026
21d ago
6-K
BEARISH ★ 6/10
awaiting T+20
May 22, 2026
21d ago
424B5
BEARISH ★ 6/10
awaiting T+20
May 21, 2026
22d ago
6-K
BEARISH ★ 7/10
awaiting T+20
May 21, 2026
22d ago
6-K
BEARISH ★ 6/10
awaiting T+20
May 20, 2026
23d ago
6-K
BEARISH ★ 7/10
awaiting T+20
May 20, 2026
23d ago
424B5
BEARISH ★ 7/10
awaiting T+20
Showing 10 of 10

US Market Status

Market Closed — Opens Mon (49h 35m)

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