Latest Period
Q2 2026
Security Snapshot
Inspire Medical Systems, Inc. - Common Stock, $0.001 par value per share (INSP) Institutional Ownership
CUSIP: 457730109
13F Institutional Holders and Ownership History from Q2 2018 to Q2 2026
Institutions Reporting
274
Shares (Excl. Options)
36,964,161
Price
$44.61
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- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Symbol
- INSP on NYSE
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 36,964,161
- Total 13F value
- $1,647,424,715
- Portfolio coverage rank
- 0%
- Share change
- +2,002,106
- Value change
- +$55,212,219
- Number of holders
- 274
- Shares outstanding
- 28,827,403
- SEC-reported price per share
- $51.07
- Insider filing price
- $51.07
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- INSP - Inspire Medical Systems, Inc. - Common Stock, $0.001 par value per share is tracked under CUSIP 457730109.
- 274 institutions reported positions in Q2 2026.
- 11 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 298 to 274 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $1,797,955,640 to $1,647,424,715.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 274 institutions filings for Q2 2026.
Security key
457730109
Latest holder period
Q2 2026
13F holders
274
13D/G owners
11
CIK / CUSIP context first
Open Q2 2026 holders
INSP full holder history
Inspire Medical Systems, Inc. SEC filings
Inspire Medical Systems, Inc. company facts
Inspire Medical Systems, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 457730109:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
11
Security
INSP
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 14% | +28% | $185,712,144 | +$36,116,657 | 4,163,016 | +24% | BlackRock, Inc. | 30 Jun 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | 8.8% | +15% | $137,296,550 | +$17,588,083 | 2,535,954 | +15% | Wellington Management Group LLP | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.4% | +28% | $109,197,318 | +$24,722,085 | 2,126,116 | +29% | Vanguard Portfolio Management | 30 Jun 2026 |
| Soleus Capital Master Fund, L.P. | 6.7% | +32% | $99,198,553 | +$23,660,936 | 1,931,436 | +31% | Soleus Capital Master Fund, L.P. | 30 Jun 2026 |
| AQR CAPITAL MANAGEMENT LLC | 6.4% | $95,365,248 | 1,856,800 | AQR Capital Management, LLC | 30 Jun 2026 | |||
| D. E. SHAW & CO, L.P. | 5.1% | $66,354,207 | 1,483,107 | D. E. Shaw & Co., L.P. | 25 Jun 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.1% | $75,807,281 | 1,469,703 | Vanguard Capital Management | 31 Mar 2026 | |||
| Flynn James E | 4.5% | -12% | $70,212,109 | -$9,714,936 | 1,296,862 | -12% | Deerfield Mgmt, L.P. | 14 May 2026 |
| FMR LLC | 2.5% | -72% | $55,005,358 | -$130,571,372 | 741,312 | -70% | FMR LLC | 30 Sep 2025 |
| CITADEL ADVISORS LLC | 1.8% | -67% | $50,085,615 | -$112,653,375 | 527,217 | -69% | Kenneth Griffin | 31 Dec 2025 |
| WASATCH ADVISORS LP | 0.5% | -92% | $10,084,819 | -$103,003,921 | 135,914 | -91% | Wasatch Advisors LP | 30 Sep 2025 |
As of 30 Jun 2026, 274 institutional investors reported holding 36,964,161 shares of Inspire Medical Systems, Inc. - Common Stock, $0.001 par value per share (INSP). This represents 128% of the company’s total 28,827,403 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
101%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 16% | 4,737,519 | +33% | 0% | $211,340,721 |
| WELLINGTON MANAGEMENT GROUP LLP | 8.3% | 2,382,660 | -6% | 0.02% | $106,290,462 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.2% | 2,088,961 | +28% | 0% | $93,188,550 |
| Soleus Capital Management, L.P. | 6.7% | 1,931,436 | +235% | 3% | $86,161,360 |
| AQR CAPITAL MANAGEMENT LLC | 6.4% | 1,856,800 | +502% | 0.03% | $80,937,912 |
| UBS Group AG | 5.7% | 1,645,511 | +158% | 0.01% | $73,406,245 |
| D. E. Shaw & Co., Inc. | 5.1% | 1,470,462 | +24% | 0.04% | $65,597,310 |
| NOMURA HOLDINGS INC | 4.8% | 1,369,410 | 0.28% | $61,089,380 | |
| DEERFIELD MANAGEMENT COMPANY, L.P. | 4.5% | 1,296,862 | -52% | 0.6% | $57,853,014 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.4% | 1,270,928 | +0.33% | 0% | $56,696,098 |
| STATE STREET CORP | 4.2% | 1,206,494 | +26% | 0% | $53,821,697 |
| Assenagon Asset Management S.A. | 3% | 864,395 | +66% | 0.05% | $38,560,661 |
| MORGAN STANLEY | 2.7% | 791,222 | -45% | 0% | $35,296,449 |
| Artisan Partners Limited Partnership | 2.5% | 732,323 | -6.2% | 0.05% | $32,668,929 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 700,836 | +37% | 0% | $31,270,244 |
| BRAIDWELL LP | 2.4% | 677,570 | 0% | 1.1% | $30,226,398 |
| GOLDMAN SACHS GROUP INC | 2.2% | 645,858 | -2.7% | 0% | $28,811,726 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 1.9% | 546,020 | +22% | 0% | $24,357,952 |
| CITADEL ADVISORS LLC | 1.8% | 506,334 | +28% | 0.01% | $22,587,560 |
| SG Americas Securities, LLC | 1.7% | 491,703 | +368% | 0.01% | $21,935,000 |
| BNP PARIBAS FINANCIAL MARKETS | 1.5% | 428,069 | 0% | 0.01% | $19,096,158 |
| RENAISSANCE TECHNOLOGIES LLC | 1.5% | 426,000 | -9.4% | 0.03% | $19,003,860 |
| ADAR1 Capital Management, LLC | 1.3% | 374,617 | -7.5% | 0.79% | $16,711,664 |
| Aberdeen Group plc | 1.2% | 358,968 | -25% | 0.02% | $16,013,562 |
| NORTHERN TRUST CORP | 1.2% | 334,039 | +70% | 0% | $14,901,479 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
33
Latest
Q2 2026
Rows shown
1-25 of 33
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 36,964,161 | $1,647,424,715 | +$55,212,219 | $44.61 | 274 |
| 2026 Q1 | 34,859,778 | $1,797,955,640 | -$107,637,208 | $51.58 | 298 |
| 2025 Q4 | 33,885,616 | $3,125,016,506 | +$310,804,814 | $92.23 | 343 |
| 2025 Q3 | 31,097,933 | $2,308,932,982 | -$485,546,950 | $74.20 | 323 |
| 2025 Q2 | 33,831,801 | $4,392,084,401 | -$58,153,296 | $129.77 | 355 |
| 2025 Q1 | 34,119,574 | $5,429,765,770 | +$100,291,872 | $159.28 | 359 |
| 2024 Q4 | 33,398,911 | $6,198,135,879 | -$10,392,454 | $185.38 | 352 |
| 2024 Q3 | 33,329,348 | $7,028,206,302 | -$1,705,882 | $211.05 | 343 |
| 2024 Q2 | 31,606,997 | $4,230,734,481 | -$140,076,478 | $133.83 | 320 |
| 2024 Q1 | 31,802,382 | $6,833,627,583 | +$185,419,402 | $214.79 | 324 |
| 2023 Q4 | 31,022,012 | $6,309,755,960 | +$504,375,008 | $203.43 | 344 |
| 2023 Q3 | 28,380,805 | $5,631,853,601 | -$36,280,954 | $198.44 | 356 |
| 2023 Q2 | 27,993,926 | $9,086,637,911 | -$98,840,711 | $324.64 | 401 |
| 2023 Q1 | 28,513,136 | $6,673,582,259 | +$65,144,358 | $234.07 | 368 |
| 2022 Q4 | 28,312,278 | $7,130,563,019 | +$41,625,853 | $251.88 | 333 |
| 2022 Q3 | 28,267,105 | $5,016,328,749 | +$139,991,536 | $177.37 | 292 |
| 2022 Q2 | 27,431,317 | $5,013,352,590 | +$89,018,351 | $182.67 | 276 |
| 2022 Q1 | 26,955,412 | $6,916,191,060 | +$287,047,237 | $256.69 | 291 |
| 2021 Q4 | 25,849,229 | $5,947,709,044 | +$76,974,096 | $230.06 | 283 |
| 2021 Q3 | 25,385,159 | $5,911,432,728 | +$104,134,188 | $232.88 | 247 |
| 2021 Q2 | 24,992,220 | $4,831,725,707 | -$34,514,146 | $193.26 | 246 |
| 2021 Q1 | 25,166,568 | $5,209,155,369 | +$94,545,681 | $206.99 | 247 |
| 2020 Q4 | 25,155,650 | $4,731,720,287 | -$140,415,322 | $188.09 | 237 |
| 2020 Q3 | 26,177,389 | $3,378,475,696 | -$39,929,859 | $129.05 | 201 |
| 2020 Q2 | 26,892,329 | $2,354,092,452 | +$328,506,311 | $87.02 | 186 |