Inspire Medical Systems, Inc. (INSP) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

258,455Shares held by institutions

$12,995,117Value of institutional holdings

114.55%Institutional ownership %

-1.64%Shares Changed QoQ

354No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Inspire Medical Systems, Inc. (NYSE:INSP) showed up in the 13F filings of 333 institutional investors as of December 2025.

These investors collectively held 118.5% of Inspire Medical Systems's outstanding shares in December 2025, up from 106.3% in September 2025.
They increased total shares held in Inspire Medical Systems by 23.25% from the prior quarter, while the number of investors in INSP decreased 5.4% year over year.
Among the 333 funds, 202 bought more Inspire Medical Systems shares, 111 sold down, and 20 held their ground.
Combined, these investors held 35.27Mn shares in INSP for December 2025, up by 6.65Mn shares quarter on quarter, and up 193.69K shares year over year.
As of December 31, 2025, the biggest holder of Inspire Medical Systems is BlackRock, Inc. at 3.55Mn shares, representing 11.93% of shares outstanding.
Top purchasers of INSP stock for the quarter ending December 2025 included WELLINGTON MANAGEMENT GROUP LLP (2.21Mn), FULLER & THALER ASSET MANAGEMENT, INC. (1.34Mn), M&T Bank Corp (935.76K), D. E. Shaw & Co., Inc. (853.3K), Morgan Stanley (809.12K).
The biggest sellers of Inspire Medical Systems for the quarter ending December 2025 included CITADEL ADVISORS LLC (1.24Mn), FMR LLC (612.01K), Soleus Capital Management, L.P. (428.79K), BALYASNY ASSET MANAGEMENT L.P. (427.13K), UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC (370.28K).
Business Quant data shows the 10 biggest positions in Inspire Medical Systems as of December 2025 are held by BlackRock, Inc. (3.55Mn), VANGUARD GROUP INC (2.95Mn), WELLINGTON MANAGEMENT GROUP LLP (2.21Mn), DEERFIELD MANAGEMENT COMPANY, L.P. (1.51Mn), FULLER & THALER ASSET MANAGEMENT, INC. (1.34Mn), Morgan Stanley (1.26Mn), D. E. Shaw & Co., Inc. (1.21Mn), WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC (1.16Mn), M&T Bank Corp (935.76K), State Street Corp (918.5K).

333 Institutional Holders

258,455 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	3,653	0.10%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	-46,917	-1.56%	$0.00
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	31 Dec, 2025	-136,288	-10.50%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	120,670	2,426.50%	$0.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	2,211,091	0.00%	$0.00
BRAIDWELL LP	31 Dec, 2025	-342,857	-38.80%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	43,118	99.04%	$0.00
DEERFIELD MANAGEMENT COMPANY, L.P.	31 Dec, 2025	458,178	43.73%	$0.00
Aberdeen Group plc	31 Dec, 2025	64,561	16.29%	$0.00
Barclays Plc	31 Dec, 2025	34,480	67.38%	$0.00
FULLER & THALER ASSET MANAGEMENT, INC.	31 Dec, 2025	1,336,198	0.00%	$0.00
UBS Group AG	31 Dec, 2025	-56,407	-12.06%	$0.00
Morgan Stanley	31 Dec, 2025	809,121	179.55%	$0.00
Soleus Capital Management, L.P.	31 Dec, 2025	-428,789	-58.88%	$0.00
D. E. Shaw & Co., Inc.	31 Dec, 2025	853,305	237.78%	$0.00
Jain Global LLC	31 Dec, 2025	264,354	6,785.27%	$0.00
M&T Bank Corp	31 Dec, 2025	935,757	0.00%	$0.00
Trexquant Investment LP	31 Dec, 2025	213,249	0.00%	$0.00
State Street Corp	31 Dec, 2025	-60,805	-6.21%	$0.00
Nuveen, LLC	31 Dec, 2025	111,569	233.15%	$0.00

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