Inspire Medical Systems, Inc. (INSP) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

27,228,947Shares Outstanding

141,772Shares held by institutions

$8,561,611Value of institutional holdings

93.26%Institutional ownership %

2.41%Shares Changed QoQ

251No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

According to SEC filings for the period ending December 2025, Inspire Medical Systems, Inc. (NYSE:INSP) is held by 323 institutional firms.

The collective stake of institutional investors in Inspire Medical Systems moved to 112.6% in December 2025, a shift up from the 106.6% reported for September 2025.
On a quarter-over-quarter basis, institutional holdings shifted by 19.58%, with a year-over-year a decrease of 8.50% in the count of filers.
A review of institutional activity for Inspire Medical Systems shows 195 of 323 filers increasing their positions, while 109 reduced their stake, and 19 remained unchanged.
Collectively, institutional investors increased their stake in Inspire Medical Systems to 33.50Mn shares as of December 2025, a change that is up by 5.48Mn shares quarter on quarter and down 192.36K shares year over year.
BlackRock, Inc.'s holding of 3.55Mn shares as of December 31, 2025 makes it the primary institutional investor in Inspire Medical Systems, owning 11.94% of the stock.
Among the most significant buyers of Inspire Medical Systems during December 2025 were WELLINGTON MANAGEMENT GROUP LLP (2.21Mn), D. E. Shaw & Co., Inc. (853.30K), MORGAN STANLEY (809.12K), FULLER & THALER ASSET MANAGEMENT, INC. (668.10K), DEUTSCHE BANK AG\ (509.63K).
Leading sellers of Inspire Medical Systems stock in 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).
The top 10 institutional holders of Inspire Medical Systems for the quarter ending December 2025 included BlackRock, Inc. (3.55Mn), VANGUARD GROUP INC (2.95Mn), WELLINGTON MANAGEMENT GROUP LLP (2.21Mn), DEERFIELD MANAGEMENT COMPANY, L.P. (1.51Mn), MORGAN STANLEY (1.26Mn), D. E. Shaw & Co., Inc. (1.21Mn), WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC (1.16Mn), STATE STREET CORP (918.50K), Artisan Partners Limited Partnership (785.74K), FULLER & THALER ASSET MANAGEMENT, INC. (668.10K).

323 Institutional Holders

141,772 Total Shares Held

Rows:

Download Data

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
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
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
FULLER & THALER ASSET MANAGEMENT, INC.	31 Dec, 2025	668,099	668,099	0.00%	$61,618,806.00
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
BNP PARIBAS FINANCIAL MARKETS	31 Dec, 2025	454,810	-67,370	-12.90%	$41,947,126.00
EVENTIDE ASSET MANAGEMENT, LLC	31 Dec, 2025	440,205	183,547	71.51%	$40,600,643.00

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