Security key
457730109
Inspire Medical Systems, Inc. - Common Stock (INSP)
CUSIP: 457730109
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 33,885,616
- Total 13F value
- $3,125,016,506
- Share change
- +2,857,618
- Put/Call ratio
- 108%
- SEC-reported price per share
- $92.23
- Number of holders
- 343
- Value change
- +$310,804,814
- Number of buys
- 192
- Number of sells
- 181
- Shares outstanding
- 28,848,250
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
343
Top holders
10
INSP full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
Inspire Medical Systems, Inc. SEC filings
Inspire Medical Systems, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 457730109
Recent filing periods:
Ownership snapshot
Top reported holders of INSP - Inspire Medical Systems, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
FMR LLC
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
30 Sep 2025
13F
13D/G
Lead comparable stake: 2.5%
13D/G row: FMR LLC
Showing 1-6 of 15 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 2.5%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens FMR LLC's linked filing trail.
Comparable ownership
Top 5
FMR LLC
2.5%
CITADEL ADVISORS LLC
1.8%
WASATCH ADVISORS LP
0.5%
BlackRock, Inc.
12%
VANGUARD GROUP INC
10%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| FMR LLC |
13F
13D/G
Company
|
2.5%
from 13D/G
|
$55,598,958
749,312 shares
|
— | 30 Sep 2025 |
| CITADEL ADVISORS LLC |
13F
13D/G
Company · Kenneth Griffin
|
1.8%
from 13D/G
|
$129,731,948
1,748,409 shares
|
— | 30 Sep 2025 |
| WASATCH ADVISORS LP |
13F
13D/G
Company
|
0.5%
from 13D/G
|
$10,084,819
135,914 shares
|
— | 30 Sep 2025 |
| BlackRock, Inc. |
13F
Company
|
12%
|
$263,201,869
3,547,195 shares
|
— | 30 Sep 2025 |
| VANGUARD GROUP INC |
13F
Company
|
10%
|
$222,606,456
3,000,087 shares
|
— | 30 Sep 2025 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC |
13F
Company
|
4.5%
|
$96,279,917
1,297,573 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
343
Shares
33,885,616
Rows available
343
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
323
Q4 2025 holders
343
Holder diff
20
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend