Inspire Medical Systems, Inc. (INSP) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

29,757,036Shares Outstanding

35,601,158Shares held by institutions

$1,852,328,251Value of institutional holdings

119.64%Institutional ownership %

24.19%Shares Changed QoQ

333No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Inspire Medical Systems, Inc. (NYSE:INSP) has 333 institutional investors with active 13F positions as of December 2025.

Their combined ownership stood at 118.5% of outstanding shares in December 2025, up from 106.3% in September 2025.
Their total shares held in INSP increased 23.25% from the prior quarter, while the number of investors in Inspire Medical Systems decreased 5.4% year over year.
Of these 333 holders, 202 added to their stakes in Inspire Medical Systems, 111 trimmed positions, and 20 made no changes.
Altogether, these fund groups held 35.27Mn shares in INSP by December 2025, up by 6.65Mn shares quarter on quarter, and up 193.69K shares year over year.
BlackRock, Inc. is the top holder of Inspire Medical Systems as of December 31, 2025, with 3.55Mn shares representing 11.93% of outstanding stock.
The most significant purchases of INSP for the quarter ending December 2025 came from 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).
Leading sellers of Inspire Medical Systems shares for the quarter ending December 2025 were 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).
According to Business Quant data, leading holders of INSP for December 2025 are 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

35,601,158 Total Shares Held

Rows:

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Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	3,550,848	3,653	0.10%	$327,494,715.00
VANGUARD GROUP INC	31 Dec, 2025	2,953,170	-46,917	-1.56%	$272,370,870.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	2,211,091	2,211,091	0.00%	$203,928,923.00
DEERFIELD MANAGEMENT COMPANY, L.P.	31 Dec, 2025	1,505,872	458,178	43.73%	$138,886,575.00
FULLER & THALER ASSET MANAGEMENT, INC.	31 Dec, 2025	1,336,198	1,336,198	0.00%	$123,237,612.00
Morgan Stanley	31 Dec, 2025	1,259,762	809,121	179.55%	$116,188,052.00
D. E. Shaw & Co., Inc.	31 Dec, 2025	1,212,162	853,305	237.78%	$111,797,701.00
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	31 Dec, 2025	1,161,285	-136,288	-10.50%	$107,105,316.00
M&T Bank Corp	31 Dec, 2025	935,757	935,757	0.00%	$15,405,764.00
State Street Corp	31 Dec, 2025	918,504	-60,805	-6.21%	$84,713,624.00
Artisan Partners Limited Partnership	31 Dec, 2025	785,742	259,500	49.31%	$72,468,985.00
Goldman Sachs Group Inc	31 Dec, 2025	569,770	306,546	116.46%	$52,549,886.00
Janus Henderson Group Plc	31 Dec, 2025	562,331	-104,747	-15.70%	$51,861,389.00
BRAIDWELL LP	31 Dec, 2025	540,890	-342,857	-38.80%	$49,886,285.00
MARSHALL WACE, LLP	31 Dec, 2025	531,079	396,810	295.53%	$48,981,418.00
DEUTSCHE BANK AG\	31 Dec, 2025	516,816	509,628	7,089.98%	$47,665,939.00
CITADEL ADVISORS LLC	31 Dec, 2025	511,318	-1,237,091	-70.76%	$47,158,859.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	491,750	-13,237	-2.62%	$45,363,565.00
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	31 Dec, 2025	463,316	-370,283	-44.42%	$42,731,635.00
Aberdeen Group plc	31 Dec, 2025	460,901	64,561	16.29%	$42,508,899.00

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