Allurion Technologies, Inc. (ALUR) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

6,577,838Shares Outstanding

91,055Shares held by institutions

$98,339Value of institutional holdings

103.73%Institutional ownership %

143.33%Shares Changed QoQ

27No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

A total of 27 institutions have reported a stake in Allurion Technologies, Inc. (NYSE:ALUR) as of December 2025, according to recent 13F filings with the SEC.

Allurion Technologies saw its institutional ownership percentage rose to 103.7% in December 2025 from 42.6% in September 2025.
Quarterly data indicates a 143.33% shift in institutional share volume, and the annual owner count reflects an increase of 3.85%.
Among the 27 institutional holders of Allurion Technologies, 15 added to their stakes while 3 trimmed their positions and 9 held steady.
This class of investors increased its holdings in Allurion Technologies to 6.82Mn shares for the 13F-cycle ending December 2025, up by 4.02Mn shares quarter on quarter, and down 7.83Mn shares year over year.
As of December 31, 2025, RTW INVESTMENTS, LP held Allurion Technologies's largest shareholding position with over 5.89Mn shares, representing 89.56% of total outstanding shares.
Among the most significant buyers of Allurion Technologies during December 2025 were RTW INVESTMENTS, LP (3.35Mn), Lunt Capital Management, Inc. (166.67K), TORONTO DOMINION BANK (162.00K), Empery Asset Management, LP (59.88K), HEIGHTS CAPITAL MANAGEMENT, INC (59.88K).
Leading sellers of Allurion Technologies stock in December 2025 included UBS Group AG (29.27K), OSAIC HOLDINGS, INC. (286), SBI Securities Co., Ltd. (3).
The top 10 institutional holders of Allurion Technologies for the quarter ending December 2025 included RTW INVESTMENTS, LP (5.89Mn), Lunt Capital Management, Inc. (166.67K), TORONTO DOMINION BANK (162.00K), VANGUARD GROUP INC (88.65K), Empery Asset Management, LP (59.88K), HEIGHTS CAPITAL MANAGEMENT, INC (59.88K), ARMISTICE CAPITAL, LLC (59.88K), Hudson Bay Capital Management LP (59.88K), L1 Global Manager Pty Ltd (59.88K), Unisphere Establishment (49.70K).

27 Institutional Holders

91,055 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
RTW INVESTMENTS, LP	31 Dec, 2025	5,891,430	3,348,827	131.71%	$7,246,459.00
Lunt Capital Management, Inc.	31 Dec, 2025	166,666	166,666	0.00%	$204,999.00
TORONTO DOMINION BANK	31 Dec, 2025	162,000	162,000	0.00%	$3,240.00
VANGUARD GROUP INC	31 Dec, 2025	88,650	32,468	57.79%	$109,039.00
Empery Asset Management, LP	31 Dec, 2025	59,881	59,881	0.00%	$73,654.00
HEIGHTS CAPITAL MANAGEMENT, INC	31 Dec, 2025	59,880	59,880	0.00%	$73,652.00
ARMISTICE CAPITAL, LLC	31 Dec, 2025	59,880	59,880	0.00%	$73,652.00
Hudson Bay Capital Management LP	31 Dec, 2025	59,880	59,880	0.00%	$87,067.00
L1 Global Manager Pty Ltd	31 Dec, 2025	59,880	59,880	0.00%	$73,652.00
Unisphere Establishment	31 Dec, 2025	49,695	0	0.00%	$61,125.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	40,311	709	1.79%	$49,586.00
UBS Group AG	31 Dec, 2025	29,865	-29,271	-49.50%	$36,734.00
STATE STREET CORP	31 Dec, 2025	26,135	11,300	76.17%	$32,146.00
BlackRock, Inc.	31 Dec, 2025	18,855	0	0.00%	$23,192.00
NORTHERN TRUST CORP	31 Dec, 2025	14,821	14,821	0.00%	$18,230.00
XTX Topco Ltd	31 Dec, 2025	12,577	12,577	0.00%	$15,470.00
Limestone Investment Advisors LP	31 Dec, 2025	10,950	0	0.00%	$168.00
Centerpoint Advisors, LLC	31 Dec, 2025	6,347	0	0.00%	$8.00
LRI Investments, LLC	31 Dec, 2025	5,000	0	0.00%	$6,150.00
OSAIC HOLDINGS, INC.	31 Dec, 2025	504	-286	-36.20%	$619.00

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