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INSP in the 13F filings

Inspire Med Sys Inc · CUSIP 457730109

Sector · Medical devices and instrumentsTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Surgical, medical and electromedical devices
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
19 Feb 2026
latest of these filings; the earliest 23 Jan 2026
Managers listing it
33
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 5 listed it in both
Shares listed
8,488,132
combined, among listed positions
Reported value
$783m
combined, at the quarter end

Among the 92 comparable managers: 18 buyers (opened or added shares) and 20 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +916,951.

Managers listing INSP in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

33 of 33 holders

ActionFiling
Wellington Management Group LLP2,211,091$204munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,212,162$112m0.06%Added+853,30517 Feb 2026 (the filing on sec.gov)
Artisan Partners LP785,742$72m0.11%Added+259,50017 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd562,331$52munder 0.1%Trimmed-104,74717 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP531,079$49munder 0.1%Added+396,81013 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC511,318$47munder 0.1%Trimmed-1,237,09117 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC410,768$38m0.06%Added+255,76812 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc308,171$28munder 0.1%Added+283,24317 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC277,199$26munder 0.1%Added+205,74812 Feb 2026 (the filing on sec.gov)
Invesco Ltd261,374$24munder 0.1%Added+168,58719 Feb 2026 (the filing on sec.gov)
Millennium Management LLC202,140$19munder 0.1%Trimmed-154,66817 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC188,100$17m0.06%Added+99,79917 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC187,226$17munder 0.1%Trimmed-427,13317 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)137,306$13munder 0.1%Trimmed-612,00617 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp112,873$10munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC78,217$7.2munder 0.1%Trimmed-50,39613 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP76,028$7.0munder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Bridgewater Associates LP71,727$6.6munder 0.1%Trimmed-17,22513 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP59,515$5.5munder 0.1%Added+22,36317 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP48,497$4.5munder 0.1%Trimmed-20,83117 Feb 2026 (the filing on sec.gov)
Man Group PLC41,425$3.8munder 0.1%Trimmed-42,42017 Feb 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP38,896$3.6munder 0.1%Added+6,07517 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP30,636$2.8munder 0.1%Added+23,86317 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC27,040$2.5munder 0.1%Trimmed-22,37717 Feb 2026 (the filing on sec.gov)
Moore Capital Management LP25,096$2.3munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (5)

Exited (5)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
11 in Q3 2024 to 3 in Q2 2026

Tracked managers listing it, at least.

0510152020192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
INSP by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20181$1.2mn.a.n.a.
Q4 20181$7.0mn.a.n.a.
Q1 20192$6.5mn.a.n.a.
Q2 20192$2.2mn.a.n.a.
Q4 20191$385kn.a.n.a.
Q1 20204$7.0mn.a.n.a.
Q2 20205$422mn.a.n.a.
Q3 20208$638mn.a.n.a.
Q4 202010$936mn.a.n.a.
Q1 202110$790mn.a.n.a.
Q2 202111$277mn.a.n.a.
Q3 202111$486mn.a.n.a.
Q4 202110$282mn.a.n.a.
Q1 202214$1.3bnn.a.n.a.
Q2 202213$790mn.a.n.a.
Q3 202214$436mn.a.n.a.
Q4 202215$740mn.a.n.a.
Q1 202315$738mn.a.n.a.
Q2 202318$1.2bnn.a.n.a.
Q3 202313$1.1bnn.a.n.a.
Q4 202310$1.6bn92
Q1 20248$2.0bn46
Q2 20247$666m64
Q3 202411$1.6bn74
Q4 202411$1.2bn66
Q1 202510$627m64
Q2 20257$649m44
Q3 20258$232m63
Q4 202510$554m1820
Q1 20264$199m1419
Q2 20263$45m1315

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

INSP and LLY →INSP and JNJ →INSP and VRTX →Choose a stock to compare with INSP →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own INSP, latest filings →Back to the 13F Explorer →