Nanobiotix S.A.
Nanobiotix S.A. (NBTX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · NBTX · as of Sep 30, 2025
Ownership Breakdown
11
Institutional Holders
▲ 1 vs Q2
$106.63M
Total Inst. Value
▲ $81.08M vs Q2
50.60M
Shares Outstanding
freeFloat 79.50%
5.64M
13F Shares Held
▼ 187 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
NBTX largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
JOHNSON & JOHNSON pharmaceutical preparations | 5.62M | 11.86% | 11.86% | $106.23B | Mar 18, 2026 | — held |
GEODE CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 10.2K | 2.15% | 2.15% | $192.38M | Nov 12, 2025 | — held |
OPTIVER HOLDING B.V. pharmaceutical preparations | 5.4K | 1.13% | 1.13% | $101.17M | Nov 10, 2025 | NEW |
MORGAN STANLEY pharmaceutical preparations | 2.4K | 0.50% | 0.50% | $44.92M | May 27, 2026 | ▼ 2.9K |
UBS GROUP AG pharmaceutical preparations | 2.2K | 0.46% | 0.46% | $40.82M | Nov 13, 2025 | ▼ 2.3K |
EVERSOURCE WEALTH ADVISORS, LLC pharmaceutical preparations | 514 | 0.11% | 0.11% | $9.71M | Nov 10, 2025 | ▼ 3 |
BNP PARIBAS ARBITRAGE, SNC pharmaceutical preparations | 400 | 0.08% | 0.08% | $7.56M | Nov 13, 2025 | ▼ 361 |
ROYAL BANK OF CANADA pharmaceutical preparations | 125 | 0.03% | 0.03% | $2.00M | Nov 14, 2025 | — held |
RHUMBLINE ADVISERS pharmaceutical preparations | 33 | 0.01% | 0.01% | $623,000 | Nov 6, 2025 | — held |
NATIONAL BANK OF CANADA /FI/ pharmaceutical preparations | 13 | 0.00% | 0.00% | $245,000 | Nov 14, 2025 | — held |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
0
Increased
+0 shares1
New Positions
first time holders4
Decreased
−5.5K shares0
Sold Out
fully exitedNet shares change (top 50)
5.5K
+0 / −5.5K
Net new holders
-3
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
NBTX insider trading · insider activity
Source: SEC Form 4
Recent Insider Transactions
Showing 10 most recent · Common Stock only
No recent insider transactions reported.
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Nanobiotix S.A. (NBTX) is primarily owned by institutional investors, who hold approximately 11.2% of total shares outstanding. Company insiders own approximately 20.50%, while retail and public investors account for the remaining 68.34%.
The largest institutional shareholder of Nanobiotix S.A. is JOHNSON & JOHNSON, holding approximately 5.62 million shares — equal to 11.86% of outstanding shares — as of September 30, 2025.
A total of 11 institutional investors currently hold NBTX stock, with a combined institutional value of approximately $106,633,384 as of the most recent 13F filing period.
Frequently asked questions
NBTX ownershipNanobiotix S.A. (NBTX) is primarily owned by institutional investors, who hold approximately 11.2% of shares. The largest shareholder is JOHNSON & JOHNSON with a 11.86% stake. Company insiders hold 20.50%. Data sourced from SEC Form 13F as of September 30, 2025.