Vault-13

INSPIRE MED SYS INC INSP

COM · Common Stock · CUSIP 457730109 · ISIN US4577301090

Company in Maple Grove, United States

302 institutional holders
28,155,01428.2m shares reported held*
97.4% of all shares outstanding*
$5.0bnreported value*

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($17.7m this quarter). Holder counts are more reliable. Shares outstanding: 28.9m as of 2022-10-25, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $177.47. Options: 16 managers hold calls ($119.8m notional), 16 hold puts ($40.8m).

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP — $42.1m237.4k shares
JANE STREET GROUP, LLC — $29.6m166.8k shares
Walleye Trading LLC — $13.0m73.1k shares
CITADEL ADVISORS LLC — $10.8m61.0k shares
Caption Management, LLC — $7.0m39.3k shares
MILLENNIUM MANAGEMENT LLC — $4.6m26.0k shares
SIMPLEX TRADING, LLC — $3.0m17.1k shares
PEAK6 Investments LLC — $3.0m16.9k shares
D. E. Shaw & Co., Inc. — $1.9m10.6k shares
K2 PRINCIPAL FUND, L.P. — $1.6m9.0k shares

Biggest puts

SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC — $12.9m73.0k shares
JANE STREET GROUP, LLC — $8.3m46.9k shares
CITADEL ADVISORS LLC — $5.8m32.5k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP — $3.5m19.6k shares
K2 PRINCIPAL FUND, L.P. — $3.3m18.4k shares
MILLENNIUM MANAGEMENT LLC — $2.5m14.0k shares
WOLVERINE TRADING, LLC — $1.2m6.6k shares
Walleye Trading LLC — $940.0k5.3k shares
SIMPLEX TRADING, LLC — $869.0k4.9k shares
TUDOR INVESTMENT CORP ET AL — $409.0k2.3k shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
BlackRock, Inc. 13G · institution +3.1 pts · filed 2026-07-28 14.4% +3.1 pts 4.2m≈ $185.7m 2026-07-28
WELLINGTON MANAGEMENT GROUP LLP 13G · institution +1.2 pts · filed 2026-05-15 8.8% +1.2 pts 2.5m≈ $113.1m 2026-05-15
VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution +1.7 pts · filed 2026-07-31 7.4% +1.7 pts 2.1m≈ $94.8m 2026-07-31
Soleus Capital Master Fund, L.P. 13G · passive investor +1.6 pts · filed 2026-08-13 6.7% +1.6 pts 1.9m≈ $86.2m 2026-08-13
AQR CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-08-12 6.4% new 1.9m≈ $82.8m 2026-08-12
D. E. SHAW & CO, L.P. 13G · passive investor new · filed 2026-07-02 5.1% new 1.5m≈ $66.2m 2026-07-02
VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 5.1% new 1.5m≈ $65.6m 2026-04-30

Fell to 5% or below in the last year: Flynn James E (4.5%, 2026-05-14), VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC), CITADEL ADVISORS LLC (1.8%, 2026-02-17), Dragoneer Investment Group, LLC (0.0%, 2025-11-14)

Insider purchases and sales in Q3 2022

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
404Q4 20: 0 buyingQ4 20: 0 sellingQ1 21: 0 buyingQ1 21: 0 sellingQ1 21Q2 21: 0 buyingQ2 21: 0 sellingQ3 21: 0 buyingQ3 21: 0 sellingQ3 21Q4 21: 0 buyingQ4 21: 2 sellingQ1 22: 0 buyingQ1 22: 3 sellingQ1 22Q2 22: 0 buyingQ2 22: 2 sellingQ3 22: 0 buyingQ3 22: 0 sellingQ3 22
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20200—0——
Q1 20210—0——
Q2 20210—0——
Q3 20210—0——
Q4 20210—2$7.7m—
Q1 20220—3$35.2m—
Q2 20220—2$6.6m—
Q3 20220—0——

None reported in Q3 2022.

Holders, Q3 2022

#ManagerLocationShares Value% of their portfolioChangeShares change
1 VANGUARD GROUP INC 0.01% of their portfolio Valley Forge, PA 2,863,6932.9m $507.9m $507.9m 0.01% —
2 BlackRock Inc. 0.01% of their portfolio New York, NY 2,005,8642.0m $355.8m $355.8m 0.01% —
3 FMR LLC 0.03% of their portfolio BOSTON, MA 1,528,7221.5m $271.1m $271.1m 0.03% —
4 MACQUARIE GROUP LTD 0.31% of their portfolio Sydney, NSW 2000, C3 1,407,9131.4m $249.8m $249.8m 0.31% —
5 FRANKLIN RESOURCES INC 0.10% of their portfolio San Mateo, CA 1,075,2381.1m $190.7m $190.7m 0.10% —
6 Champlain Investment Partners, LLC 0.84% of their portfolio BURLINGTON, VT 690,170690.2k $122.4m $122.4m 0.84% —
7 Invesco Ltd. 0.04% of their portfolio ATLANTA, GA 661,689661.7k $117.4m $117.4m 0.04% —
8 WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.46% of their portfolio CHICAGO, IL 658,612658.6k $116.8m $116.8m 0.46% —
9 VIKING GLOBAL INVESTORS LP 0.52% of their portfolio STAMFORD, CT 633,572633.6k $112.4m $112.4m 0.52% —
10 WASATCH ADVISORS LP 0.75% of their portfolio SALT LAKE CITY, UT 605,398605.4k $107.4m $107.4m 0.75% —
11 GILDER GAGNON HOWE & CO LLC 1.86% of their portfolio New York, NY 601,505601.5k $106.7m $106.7m 1.86% —
12 STATE STREET CORP 0.01% of their portfolio BOSTON, MA 585,750585.8k $103.9m $103.9m 0.01% —
13 WELLINGTON MANAGEMENT GROUP LLP 0.02% of their portfolio Boston, MA 557,157557.2k $98.8m $98.8m 0.02% —
14 CITADEL ADVISORS LLC 0.12% of their portfolio MIAMI, FL 549,466549.5k $97.5m $97.5m 0.12% —
15 LORD, ABBETT & CO. LLC 0.33% of their portfolio JERSEY CITY, NJ 511,447511.4k $90.7m $90.7m 0.33% —
16 Point72 Asset Management, L.P. 0.38% of their portfolio STAMFORD, CT 488,672488.7k $86.7m $86.7m 0.38% —
17 CREDIT SUISSE AG/ 0.10% of their portfolio ZURICH, V8 486,044486.0k $86.2m $86.2m 0.10% —
18 FARALLON CAPITAL MANAGEMENT, L.L.C. 0.52% of their portfolio SAN FRANCISCO, CA 481,996482.0k $85.5m $85.5m 0.52% —
19 GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio BOSTON, MA 479,764479.8k $85.1m $85.1m 0.01% —
20 Allspring Global Investments Holdings, LLC 0.15% of their portfolio CHARLOTTE, NC 471,557471.6k $83.6m $83.6m 0.15% —
21 FRED ALGER MANAGEMENT, LLC 0.41% of their portfolio NEW YORK, NY 459,588459.6k $81.5m $81.5m 0.41% —
22 Bellevue Group AG 1.02% of their portfolio ZURICH, V8 401,768401.8k $71.3m $71.3m 1.02% —
23 MARSHALL WACE, LLP 0.16% of their portfolio LONDON, X0 364,437364.4k $64.6m $64.6m 0.16% —
24 NORTHERN TRUST CORP 0.01% of their portfolio CHICAGO, IL 312,176312.2k $55.4m $55.4m 0.01% —
25 WESTFIELD CAPITAL MANAGEMENT CO LP 0.43% of their portfolio BOSTON, MA 306,267306.3k $54.3m $54.3m 0.43% —
26 BAMCO INC /NY/ 0.17% of their portfolio NEW YORK, NY 293,336293.3k $52.0m $52.0m 0.17% —
27 Bank of New York Mellon Corp 0.01% of their portfolio NEW YORK, NY 292,125292.1k $51.8m $51.8m 0.01% —
28 LOOMIS SAYLES & CO L P 0.10% of their portfolio BOSTON, MA 291,150291.1k $51.6m $51.6m 0.10% —
29 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio SAN FRANCISCO, CA 287,848287.8k $51.1m $51.1m 0.02% —
30 VICTORY CAPITAL MANAGEMENT INC 0.06% of their portfolio San Antonio, TX 284,168284.2k $50.4m $50.4m 0.06% —
31 AMERIPRISE FINANCIAL INC 0.02% of their portfolio MINNEAPOLIS, MN 268,738268.7k $47.7m $47.7m 0.02% —
32 Driehaus Capital Management LLC 0.72% of their portfolio Chicago, IL 268,146268.1k $47.6m $47.6m 0.72% —
33 PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio BALTIMORE, MD 264,666264.7k $46.9m $46.9m 0.01% —
34 NORGES BANK 0.01% of their portfolio OSLO, Q8 247,350247.3k $43.9m $43.9m 0.01% —
35 FEDERATED HERMES, INC. 0.12% of their portfolio PITTSBURGH, PA 240,000240.0k $42.6m $42.6m 0.12% —
36 GOLDMAN SACHS GROUP INC 0.01% of their portfolio NEW YORK, NY 235,670235.7k $41.8m $41.8m 0.01% —
37 TimesSquare Capital Management, LLC 0.57% of their portfolio NEW YORK, NY 232,520232.5k $41.2m $41.2m 0.57% —
38 SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC 3.12% of their portfolio Boston, MA 212,584212.6k $37.7m $37.7m 3.12% —
39 FRONTIER CAPITAL MANAGEMENT CO LLC 0.43% of their portfolio Boston, MA 206,559206.6k $36.6m $36.6m 0.43% —
40 PURA VIDA INVESTMENTS, LLC 5.39% of their portfolio NEW YORK, NY 201,584201.6k $35.8m $35.8m 5.39% —
41 JENNISON ASSOCIATES LLC 0.03% of their portfolio NEW YORK, NY 172,746172.7k $30.6m $30.6m 0.03% —
42 KEYBANK NATIONAL ASSOCIATION/OH 0.15% of their portfolio BROOKLYN, OH 162,392162.4k $28.8m $28.8m 0.15% —
43 Atika Capital Management LLC 3.08% of their portfolio NEW YORK, NY 153,502153.5k $27.2m $27.2m 3.08% —
44 Holocene Advisors, LP 0.16% of their portfolio New York, NY 142,528142.5k $25.3m $25.3m 0.16% —
45 Artisan Partners Limited Partnership 0.04% of their portfolio Milwaukee, WI 133,586133.6k $23.7m $23.7m 0.04% —
46 MAIRS & POWER INC 0.30% of their portfolio St Paul, MN 132,007132.0k $23.4m $23.4m 0.30% —
47 Granite Investment Partners, LLC 1.00% of their portfolio EL SEGUNDO, CA 130,090130.1k $23.1m $23.1m 1.00% —
48 Amundi 0.01% of their portfolio Paris, I0 128,000128.0k $24.2m $24.2m 0.01% —
49 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 122,221122.2k $21.7m $21.7m 0.00% —
50 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 117,063117.1k $20.8m $20.8m 0.00% —
51 EAGLE ASSET MANAGEMENT INC 0.13% of their portfolio ST PETERSBURG, FL 114,440114.4k $20.3m $20.3m 0.13% —
52 Thrivent Financial for Lutherans 0.05% of their portfolio Minneapolis, MN 112,018112.0k $19.9m $19.9m 0.05% —
53 Nuveen Asset Management, LLC 0.01% of their portfolio CHICAGO, IL 108,855108.9k $19.3m $19.3m 0.01% —
54 Polar Asset Management Partners Inc. 0.25% of their portfolio TORONTO, A6 108,002108.0k $19.2m $19.2m 0.25% —
55 SEI INVESTMENTS CO 0.04% of their portfolio OAKS, PA 107,087107.1k $19.0m $19.0m 0.04% —
56 Eagle Health Investments LP 4.09% of their portfolio Greenwich, CT 100,553100.6k $17.8m $17.8m 4.09% —
57 Iron Triangle Partners LP 3.10% of their portfolio Cos Cob, CT 100,000100.0k $17.7m $17.7m 3.10% —
58 MOORE CAPITAL MANAGEMENT, LP 0.48% of their portfolio NEW YORK, NY 99,03499.0k $17.6m $17.6m 0.48% —
59 D. E. Shaw & Co., Inc. 0.03% of their portfolio New York, NY 96,79996.8k $17.2m $17.2m 0.03% —
60 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 90,99391.0k $16.1m $16.1m 0.00% —
61 JACOBS LEVY EQUITY MANAGEMENT, INC 0.13% of their portfolio FLORHAM PARK, NJ 89,20789.2k $15.8m $15.8m 0.13% —
62 LAZARD ASSET MANAGEMENT LLC 0.02% of their portfolio NEW YORK, NY 85,55485.6k $15.2m $15.2m 0.02% —
63 EVENTIDE ASSET MANAGEMENT, LLC 0.29% of their portfolio Boston, MA 84,05084.0k $14.9m $14.9m 0.29% —
64 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio NEW YORK, NY 82,82782.8k $14.7m $14.7m 0.01% —
65 Nicholas Investment Partners, LP 1.12% of their portfolio RANCHO SANTA FE, CA 68,17168.2k $12.1m $12.1m 1.12% —
66 Soleus Capital Management, L.P. 1.62% of their portfolio GREENWICH, CT 67,40067.4k $12.0m $12.0m 1.62% —
67 Swiss National Bank 0.01% of their portfolio ZURICH, V8 65,40065.4k $11.6m $11.6m 0.01% —
68 LMR Partners LLP 0.24% of their portfolio LONDON, X0 65,00065.0k $11.5m $11.5m 0.24% —
69 Rhenman & Partners Asset Management AB 1.29% of their portfolio Stockholm, V7 63,00063.0k $12.3m $12.3m 1.29% —
70 NOVO HOLDINGS A/S 0.52% of their portfolio HELLERUP, G7 60,90060.9k $10.8m $10.8m 0.52% —
71 California Public Employees Retirement System 0.01% of their portfolio Sacramento, CA 59,09059.1k $10.5m $10.5m 0.01% —
72 Cubist Systematic Strategies, LLC 0.08% of their portfolio STAMFORD, CT 58,68458.7k $10.4m $10.4m 0.08% —
73 SEGALL BRYANT & HAMILL, LLC 0.11% of their portfolio CHICAGO, IL 52,13052.1k $9.2m $9.2m 0.11% —
74 Bridgewater Associates, LP 0.04% of their portfolio Westport, CT 44,85344.9k $8.0m $8.0m 0.04% —
75 NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio ALBANY, NY 44,38944.4k $7.9m $7.9m 0.01% —
76 Squarepoint Ops LLC 0.07% of their portfolio NEW YORK, NY 43,79743.8k $7.8m $7.8m 0.07% —
77 SECTORAL ASSET MANAGEMENT INC 1.46% of their portfolio MONTREAL, A8 41,80041.8k $7.4m $7.4m 1.46% —
78 Integral Health Asset Management, LLC 1.44% of their portfolio New York, NY 40,00040.0k $7.1m $7.1m 1.44% —
79 HealthCor Management, L.P. 0.85% of their portfolio NEW YORK, NY 38,24038.2k $6.8m $6.8m 0.85% —
80 KORNITZER CAPITAL MANAGEMENT INC /KS 0.14% of their portfolio SHAWNEE MISSION, KS 37,16037.2k $6.6m $6.6m 0.14% —
81 RHUMBLINE ADVISERS 0.01% of their portfolio BOSTON, MA 36,57536.6k $6.5m $6.5m 0.01% —
82 STATE OF WISCONSIN INVESTMENT BOARD 0.02% of their portfolio MADISON, WI 35,64235.6k $6.3m $6.3m 0.02% —
83 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 35,37435.4k $6.3m $6.3m 0.00% —
84 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio WEST SACRAMENTO, CA 34,89034.9k $6.2m $6.2m 0.01% —
85 Lisanti Capital Growth, LLC 0.81% of their portfolio NEW YORK, NY 34,17934.2k $6.1m $6.1m 0.81% —
86 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 34,11534.1k $6.1m $6.1m 0.00% —
87 OAK RIDGE INVESTMENTS LLC 0.91% of their portfolio Chicago, IL 33,70333.7k $6.0m $6.0m 0.91% —
88 CASTLEARK MANAGEMENT LLC 0.33% of their portfolio CHICAGO, IL 33,12033.1k $5.9m $5.9m 0.33% —
89 Legal & General Group Plc 0.00% of their portfolio London, X0 32,58032.6k $5.8m $5.8m 0.00% —
90 NEXT CENTURY GROWTH INVESTORS LLC 0.69% of their portfolio PLYMOUTH, MN 31,82531.8k $5.6m $5.6m 0.69% —
91 STRS OHIO 0.03% of their portfolio COLUMBUS, OH 30,50030.5k $5.4m $5.4m 0.03% —
92 Russell Investments Group, Ltd. 0.01% of their portfolio Seattle, WA 30,14830.1k $5.3m $5.3m 0.01% —
93 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio BOSTON, MA 28,66528.7k $5.1m $5.1m 0.01% —
94 Miura Global Management, LLC 2.88% of their portfolio New York, NY 27,10027.1k $4.8m $4.8m 2.88% —
95 OSTERWEIS CAPITAL MANAGEMENT INC 0.35% of their portfolio SAN FRANCISCO, CA 26,15526.2k $4.6m $4.6m 0.35% —
96 COMERICA BANK 0.04% of their portfolio DALLAS, TX 25,97826.0k $4.5m $4.5m 0.04% —
97 Tri Locum Partners LP 1.18% of their portfolio NEW YORK, NY 23,41223.4k $4.2m $4.2m 1.18% —
98 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.02% of their portfolio COLUMBUS, OH 21,89321.9k $3.9m $3.9m 0.02% —
99 KINGDON CAPITAL MANAGEMENT, L.L.C. 1.15% of their portfolio NEW YORK, NY 21,00021.0k $3.7m $3.7m 1.15% —
100 HSBC HOLDINGS PLC 0.01% of their portfolio LONDON, X0 20,80020.8k $3.7m $3.7m 0.01% —