Inspire Medical Systems, Inc. - Common Stock (INSP)
CUSIP: 457730109
Q1 2026 13F Holders as of 31 Mar 2026
- Type / Class
- Equity / Common Stock
- Shares outstanding
- 28,817,706
- Total 13F shares
- 1,885,903
- Share change
- +148,813
- Total reported value
- $97,252,418
- Price per share
- $51.58
- Number of holders
- 71
- Value change
- -$3,684,175
- Number of buys
- 40
- Number of sells
- 46
Quarterly Holders Quick Answers
What is CUSIP 457730109?
CUSIP 457730109 identifies INSP - Inspire Medical Systems, Inc. - Common Stock in SEC institutional holdings data.
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- Latest 13F filings for newly reported positions across managers.
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- Previous quarter: Q4 2025
Recent filing periods for CUSIP 457730109:
Top shareholders of INSP - Inspire Medical Systems, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
|
Company |
11%
from 13D/G
|
3,550,848
|
$327,494,715 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
10%
|
2,953,170
|
$272,370,870 | — | 31 Dec 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13D/G
13F
|
Company |
7.6%
|
2,211,091
|
$210,053,645 | $0 | 31 Dec 2025 | |
| DEERFIELD MANAGEMENT COMPANY, L.P. |
13F
|
Company |
5.2%
|
1,505,872
|
$138,886,575 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
4.4%
|
1,259,762
|
$116,188,052 | — | 31 Dec 2025 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
4.2%
|
1,212,162
|
$111,797,701 | — | 31 Dec 2025 | |
| James E. Flynn |
13D/G
|
Deerfield Mgmt, L.P. |
5.1%
|
1,476,303
|
$109,541,683 | $0 | 06 Nov 2025 | |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC |
13F
|
Company |
4%
|
1,161,285
|
$107,105,316 | — | 31 Dec 2025 | |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
|
Vanguard Portfolio Management |
5.7%
|
1,644,767
|
$84,837,082 | $0 | 31 Mar 2026 | |
| STATE STREET CORP |
13F
|
Company |
3.2%
|
918,504
|
$84,713,624 | — | 31 Dec 2025 | |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
|
Vanguard Capital Management |
5.1%
|
1,469,703
|
$75,807,281 | $0 | 31 Mar 2026 | |
| Artisan Partners Limited Partnership |
13F
|
Company |
2.7%
|
785,742
|
$72,468,985 | — | 31 Dec 2025 | |
| FULLER & THALER ASSET MANAGEMENT, INC. |
13F
|
Company |
2.3%
|
668,099
|
$61,618,806 | — | 31 Dec 2025 | |
| FMR LLC |
13D/G
13F
|
Company |
2.5%
|
741,312
|
$55,005,358 | -$130,571,372 | 30 Sep 2025 | |
| JANUS HENDERSON GROUP PLC |
13F
|
Company |
2%
|
562,331
|
$51,861,389 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13D/G
13F
|
Kenneth Griffin · Company |
1.8%
|
527,217
|
$50,085,615 | -$112,653,375 | 31 Dec 2025 | |
| BRAIDWELL LP |
13F
|
Company |
1.9%
|
540,890
|
$49,886,285 | — | 31 Dec 2025 | |
| MARSHALL WACE, LLP |
13F
|
Company |
1.8%
|
531,079
|
$48,981,418 | — | 31 Dec 2025 | |
| DEUTSCHE BANK AG\ |
13F
|
Company |
1.8%
|
516,816
|
$47,665,939 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.7%
|
491,750
|
$45,363,565 | — | 31 Dec 2025 | |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC |
13F
|
Company |
1.6%
|
463,316
|
$42,731,635 | — | 31 Dec 2025 | |
| Aberdeen Group plc |
13F
|
Company |
1.6%
|
460,901
|
$42,508,899 | — | 31 Dec 2025 | |
| BNP PARIBAS FINANCIAL MARKETS |
13F
|
Company |
1.6%
|
454,810
|
$41,947,126 | — | 31 Dec 2025 | |
| EVENTIDE ASSET MANAGEMENT, LLC |
13F
|
Company |
1.5%
|
440,205
|
$40,600,643 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
1.4%
|
411,329
|
$37,936,873 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
1.4%
|
410,768
|
$37,885,133 | — | 31 Dec 2025 | |
| Amundi |
13F
|
Individual |
1.3%
|
364,622
|
$33,629,087 | — | 31 Dec 2025 | |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
|
Company |
1.2%
|
348,500
|
$32,142,155 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.2%
|
341,397
|
$31,487,633 | — | 31 Dec 2025 | |
| BAMCO INC /NY/ |
13F
|
Company |
1.2%
|
337,486
|
$31,126,334 | — | 31 Dec 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
1.1%
|
308,171
|
$28,424,000 | — | 31 Dec 2025 | |
| Jefferies Financial Group Inc. |
13F
|
Company |
1.1%
|
307,588
|
$28,368,841 | — | 31 Dec 2025 | |
| Soleus Capital Management, L.P. |
13F
|
Company |
1%
|
299,399
|
$27,613,570 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.99%
|
284,885
|
$26,274,943 | — | 31 Dec 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
0.96%
|
277,199
|
$25,566,064 | — | 31 Dec 2025 | |
| Jain Global LLC |
13F
|
Company |
0.93%
|
268,250
|
$24,740,698 | — | 31 Dec 2025 | |
| Assenagon Asset Management S.A. |
13F
|
Company |
0.92%
|
264,999
|
$24,440,858 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.91%
|
261,374
|
$24,106,523 | — | 31 Dec 2025 | |
| FRANKLIN RESOURCES INC |
13F
|
Company |
0.8%
|
231,438
|
$21,345,516 | — | 31 Dec 2025 | |
| Marilyn Carlson Nelson |
3/4/5
|
Director |
—
class O/S missing
|
86,539
|
$20,828,207 | — | 29 Apr 2024 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.75%
|
215,780
|
$19,901,416 | — | 31 Dec 2025 | |
| Trexquant Investment LP |
13F
|
Company |
0.74%
|
213,249
|
$19,667,955 | — | 31 Dec 2025 | |
| Regal Partners Ltd |
13F
|
Company |
0.73%
|
211,304
|
$19,488,569 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.73%
|
210,126
|
$19,379,920 | — | 31 Dec 2025 | |
| Champlain Investment Partners, LLC |
13F
|
Company |
0.7%
|
203,098
|
$18,731,729 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.7%
|
202,140
|
$18,643,372 | — | 31 Dec 2025 | |
| KEYBANK NATIONAL ASSOCIATION/OH |
13F
|
Company |
0.69%
|
200,042
|
$18,449,874 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.69%
|
197,456
|
$18,211,366 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.67%
|
194,155
|
$17,906,916 | — | 31 Dec 2025 | |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC |
13F
|
Company |
0.65%
|
188,100
|
$17,348,463 | — | 31 Dec 2025 |
Institutional Holders of Inspire Medical Systems, Inc. - Common Stock (INSP) as of Q1 2026
As of 31 Mar 2026,
Inspire Medical Systems, Inc. - Common Stock (INSP) was held by
71 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
1,885,903 shares.
The largest 10 holders included
Assenagon Asset Management S.A., Aberdeen Group plc, Y-Intercept (Hong Kong) Ltd, WASATCH ADVISORS LP, SG Americas Securities, LLC, RIVERBRIDGE PARTNERS LLC, Nuveen, LLC, NEW YORK STATE TEACHERS RETIREMENT SYSTEM, Leonteq Securities AG, and Oak Thistle LLC.
This page lists
71
institutional shareholders reporting positions in this security
for the Q1 2026 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
342
Q1 2026 holders
71
Holder diff
-271
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 Value $ | Q1 2026 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.