Inspire Medical Systems, Inc. - Common Stock, $0.001 par value per share (INSP)

CUSIP: 457730109

Q1 2026 13F Holders as of 31 Mar 2026

Security identity
Security type / class
Equity / Common Stock, $0.001 par value per share
Shares outstanding
28,838,196
Holder snapshot
Total 13F shares
34,850,977
Share change
+1,006,897
Total reported value
$1,797,502,160
Put/Call ratio
353%
Reported price per share
$51.58
Number of holders
296
Value change
-$107,821,202
Number of buys
168
Number of sells
188

Security key

457730109

Report period

Q1 2026

Institutions

296

Top holders

10

INSP full security history Ownership snapshot Full 13F holder table Previous quarter: Q4 2025 Inspire Medical Systems, Inc. SEC filings Inspire Medical Systems, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of INSP - Inspire Medical Systems, Inc. - Common Stock, $0.001 par value per share (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.

Lead holder
BlackRock, Inc.
13D/G signal
BlackRock, Inc.
Evidence rows
15
Latest as of
31 Mar 2026
13F 13D/G 3/4/5 Lead comparable stake: 11% 13D/G row: BlackRock, Inc. Showing 1-6 of 15 holder rows.
Holder Evidence Ownership % Position 12M Net Δ As of
BlackRock, Inc.
13F 13D/G
Company
13F 13D/G
11%
from 13D/G
$327,494,715
3,550,848 shares
 — 31 Dec 2025
WELLINGTON MANAGEMENT GROUP LLP
13F 13D/G
Company
13F 13D/G
8.8%
from 13D/G
$203,928,923
2,211,091 shares
 — 31 Dec 2025
VANGUARD PORTFOLIO MANAGEMENT LLC
13D/G
Vanguard Portfolio Management
13D/G
5.7%
$84,837,082
1,644,767 shares
 $0 31 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC
13D/G
Vanguard Capital Management
13D/G
5.1%
$75,807,281
1,469,703 shares
 $0 31 Mar 2026
FMR LLC
13D/G 13F
Company
13D/G 13F
2.5%
$55,005,358
741,312 shares
 -$130,571,372 30 Sep 2025
CITADEL ADVISORS LLC
13D/G 13F
Kenneth Griffin · Company
13D/G 13F
1.8%
$50,085,615
527,217 shares
 -$112,653,375 31 Dec 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 Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions
296
Shares
34,850,977
Rows available
296
Investor Option Weight % Change % Reported value * Price Shares Share Change Activity Report Period

* 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 failed the local validity check.

Compare Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders
342
Q1 2026 holders
296
Holder diff
-46
Investor Q4 2025 Shares Q1 2026 Shares Share Diff Share Chg % Q4 2025 value Q1 2026 value Value change Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
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