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

Q: What does CUSIP 457730109 represent in this 13F holders report?

CUSIP 457730109 is the security identifier for INSP - Inspire Medical Systems, Inc. - Common Stock, $0.001 par value per share used to aggregate holder disclosures.

Q: How many institutions held INSP - Inspire Medical Systems, Inc. - Common Stock, $0.001 par value per share in Q1 2026?

299 institutional investors reported INSP - Inspire Medical Systems, Inc. - Common Stock, $0.001 par value per share for Q1 2026. Use the holders table for investor-level position and value details.

CUSIP: 457730109

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Common Stock, $0.001 par value per share
Total 13F shares: 34,867,862
Total 13F value: $1,798,372,613
Share change: +1,014,664
Put/Call ratio: 353%
SEC-reported price per share: $51.58
Number of holders: 299
Value change: -$107,697,136
Number of buys: 171
Number of sells: 191
Shares outstanding: 28,827,403

Security key

457730109

Report period

Q1 2026

Institutions

299

Top holders

INSP full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 Inspire Medical Systems, Inc. SEC filings Inspire Medical Systems, Inc. company facts

Broader feeds

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

Reporting periods

Holder history for CUSIP 457730109

Newer quarter: Q3 2026

Recent filing periods:

Q3 2026

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.

Comparable stake leader

WELLINGTON MANAGEMENT GRO...

Disclosed value leader

BlackRock, Inc.

Comparable rows

15/15

Latest evidence

31 Mar 2026

13F 13D/G 3/4/5 Lead comparable stake: 8.8% 13D/G row: WELLINGTON MANAGEMENT GROUP LLP Showing 1-6 of 15 holder rows.

Quick read

WELLINGTON MANAGEMENT GROUP LLP leads the comparable SEC ownership view at 8.8%.

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 WELLINGTON MANAGEMENT GROUP LLP's linked filing trail.

Comparable ownership Top 5

WELLINGTON MANAGEMENT GROUP LLP 8.8%

VANGUARD CAPITAL MANAGEMENT LLC 5.1%

FMR LLC 2.5%

CITADEL ADVISORS LLC 1.8%

WASATCH ADVISORS LP 0.5%

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
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 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
WASATCH ADVISORS LP	13F 13D/G Company 13F 13D/G	0.5% from 13D/G	$10,704,952 116,068 shares	—	31 Dec 2025
Timothy P. Herbert	3/4/5 CEO and President, Director 3/4/5	0.57%	$13,211,787 163,492 shares	—	20 Feb 2026

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

299

34,867,862

Rows available

299

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 Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

299

Q1 2026 holders

299

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend