Allurion Technologies Inc.
Allurion Technologies Inc. (ALUR) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ALUR · as of Sep 30, 2025
Ownership Breakdown
20
Institutional Holders
▼ 1 vs Q2
$5.75M
Total Inst. Value
▼ $1.09M vs Q2
7.54M
Shares Outstanding
freeFloat 98.52%
2.82M
13F Shares Held
▲ 1,574 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
ALUR largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
RTW INVESTMENTS, LP surgical & medical instruments & apparatus | 2.54M | 3.48% | 3.48% | $5.21B | Nov 14, 2025 | — held |
UBS GROUP AG surgical & medical instruments & apparatus | 59.1K | 8.10% | 8.10% | $121.23M | Nov 13, 2025 | ▼ 3.7K |
VANGUARD GROUP INC surgical & medical instruments & apparatus | 56.2K | 7.70% | 7.70% | $115.17M | Nov 7, 2025 | ▲ 6.8K |
UNISPHERE ESTABLISHMENT surgical & medical instruments & apparatus | 49.7K | 6.81% | 6.81% | $101.88M | Nov 14, 2025 | — held |
GEODE CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 39.6K | 5.42% | 5.42% | $81.19M | Nov 12, 2025 | ▲ 82 |
BLACKROCK, INC. surgical & medical instruments & apparatus | 18.9K | 2.58% | 2.58% | $38.65M | Nov 12, 2025 | — held |
STATE STREET CORP surgical & medical instruments & apparatus | 14.8K | 2.03% | 2.03% | $30.41M | Nov 14, 2025 | — held |
XTX TOPCO LTD surgical & medical instruments & apparatus | 12.2K | 1.67% | 1.67% | $25.06M | Nov 14, 2025 | ▼ 6.4K |
LIMESTONE INVESTMENT ADVISORS LP surgical & medical instruments & apparatus | 10.9K | 1.50% | 1.50% | $296,000 | Nov 13, 2025 | NEW |
CENTERPOINT ADVISORS, LLC surgical & medical instruments & apparatus | 6.3K | 0.87% | 0.87% | $13.00M | Nov 6, 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
3
Increased
+6.9K shares1
New Positions
first time holders5
Decreased
−14.5K shares2
Sold Out
fully exitedNet shares change (top 50)
7.6K
+6.9K / −14.5K
Net new holders
-3
1 new / 2 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ALUR insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
12
Buy transactions
5
Sell transactions
2.40
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Davin Michael R director | Oct 3, 2025 | Gift | 604 | — | — | 3.8K | Form 4 ↗ |
Davin Michael R director | Nov 26, 2025 | Gift | 2,608 | — | — | 3.2K | Form 4 ↗ |
Davin Michael R director | Dec 3, 2025 | Sale | 1,606 | $1.48 | $2.4K | 1.6K | Form 4 ↗ |
Davin Michael R director | Nov 26, 2025 | Gift | 2,608 | — | — | 1.2K | Form 4 ↗ |
Davin Michael R director | Oct 3, 2025 | Gift | 604 | — | — | 604 | Form 4 ↗ |
Davin Michael R director | Dec 4, 2025 | Sale | 1,606 | $1.58 | $2.5K | 0 | Form 4 ↗ |
RTW INVESTMENTS, LP
| Nov 12, 2025 | Award | 991,544 | $1.67 | $1.66M | 3.14M | Form 4 ↗ |
RTW INVESTMENTS, LP
| Nov 12, 2025 | Award | 767,848 | $1.67 | $1.28M | 2.43M | Form 4 ↗ |
RTW INVESTMENTS, LP
| Nov 12, 2025 | Award | 991,544 | $1.67 | $1.66M | 991.5K | Form 4 ↗ |
RTW INVESTMENTS, LP
| Nov 12, 2025 | Award | 767,848 | $1.67 | $1.28M | 767.8K | Form 4 ↗ |
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
Allurion Technologies Inc. (ALUR) is primarily owned by institutional investors, who hold approximately 37.4% of total shares outstanding. Company insiders own approximately 1.48%, while retail and public investors account for the remaining 61.17%.
The largest institutional shareholder of Allurion Technologies Inc. is RTW INVESTMENTS, LP, holding approximately 2.54 million shares — equal to 3.48% of outstanding shares — as of September 30, 2025.
A total of 20 institutional investors currently hold ALUR stock, with a combined institutional value of approximately $5,753,919 as of the most recent 13F filing period.
Frequently asked questions
ALUR ownershipAllurion Technologies Inc. (ALUR) is primarily owned by institutional investors, who hold approximately 37.4% of shares. The largest shareholder is RTW INVESTMENTS, LP with a 3.48% stake. Company insiders hold 1.48%. Data sourced from SEC Form 13F as of September 30, 2025.