Latest Period
Q2 2026
Security Snapshot
INSMED Inc - Common Stock, par value $0.01 per share (INSM) Institutional Ownership
CUSIP: 457669307
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
661
Shares (Excl. Options)
223,108,503
Price
$106.62
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- Security type / class
- Equity / Common Stock, par value $0.01 per share
- Symbol
- INSM on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 223,108,503
- Total 13F value
- $23,753,413,910
- Portfolio coverage rank
- 0.02%
- Share change
- +2,865,954
- Value change
- +$93,668,798
- Number of holders
- 661
- Shares outstanding
- 214,372,100
- SEC-reported price per share
- $99.02
- Insider filing price
- $99.02
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- INSM - INSMED Inc - Common Stock, par value $0.01 per share is tracked under CUSIP 457669307.
- 661 institutions reported positions in Q2 2026.
- 6 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 671 to 661 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $35,371,088,878 to $23,753,413,910.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 661 institutions filings for Q2 2026.
Security key
457669307
Latest holder period
Q2 2026
13F holders
661
13D/G owners
6
CIK / CUSIP context first
Open Q2 2026 holders
INSM full holder history
INSMED Inc SEC filings
INSMED Inc company facts
INSMED Inc insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 457669307:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
6
Security
INSM
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| FMR LLC | 7.4% | +22% | $1,864,509,880 | +$344,797,229 | 16,127,583 | +23% | FMR LLC | 30 Jun 2026 |
| BlackRock, Inc. | 6.6% | +30% | $2,457,696,288 | +$764,349,568 | 14,121,445 | +45% | BlackRock, Inc. | 31 Dec 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC | 5.3% | $1,882,915,303 | 11,514,893 | Vanguard Capital Management | 31 Mar 2026 | |||
| JPMORGAN CHASE & CO | 4.7% | -55% | $1,105,183,654 | -$1,348,633,593 | 10,365,622 | -55% | JPMORGAN CHASE & CO. | 30 Jun 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 3.3% | -43% | $998,278,616 | -$619,088,189 | 6,932,009 | -38% | T. Rowe Price Associates, Inc. | 30 Sep 2025 |
| Darwin Global Management, Ltd. | 3% | -60% | $743,506,754 | -$1,199,340,568 | 6,431,163 | -62% | Darwin Global Management, Ltd. | 30 Jun 2026 |
As of 30 Jun 2026, 661 institutional investors reported holding 223,108,503 shares of INSMED Inc - Common Stock, par value $0.01 per share (INSM). This represents 104% of the company’s total 214,372,100 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
70%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| FMR LLC | 7.5% | 16,143,583 | +23% | 0.07% | $1,721,228,828 |
| BlackRock, Inc. | 7.4% | 15,807,984 | -5.2% | 0.03% | $1,685,447,191 |
| JPMORGAN CHASE & CO | 4.9% | 10,428,170 | -57% | 0.06% | $1,092,246,620 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4.9% | 10,407,962 | +0.35% | 0.05% | $1,109,696,908 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.6% | 9,790,865 | +1.5% | 0.02% | $1,043,902,026 |
| BAKER BROS. ADVISORS LP | 4.1% | 8,796,111 | +19% | 4.7% | $937,841,355 |
| Capital International Investors | 3.8% | 8,238,124 | +47% | 0.18% | $878,338,960 |
| Darwin Global Management, Ltd. | 3% | 6,431,163 | -62% | 18% | $673,600,013 |
| AMERIPRISE FINANCIAL INC | 2.9% | 6,179,571 | +102% | 0.13% | $658,878,001 |
| Orbis Allan Gray Ltd | 2.8% | 6,076,487 | +224% | 2.2% | $647,875,044 |
| STATE STREET CORP | 2.8% | 6,052,174 | +9% | 0.02% | $645,282,792 |
| D. E. Shaw & Co., Inc. | 2.7% | 5,877,959 | +4.5% | 0.39% | $626,707,989 |
| Artisan Partners Limited Partnership | 2.5% | 5,441,718 | -17% | 0.95% | $580,195,955 |
| RTW INVESTMENTS, LP | 2.3% | 4,842,880 | 0% | 4.4% | $516,347,866 |
| GEODE CAPITAL MANAGEMENT, LLC | 2% | 4,220,155 | -5.2% | 0.02% | $448,763,113 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.6% | 3,405,290 | +10% | 0.04% | $363,073,000 |
| NORGES BANK | 1.6% | 3,377,641 | 0.04% | $360,124,083 | |
| Jupiter Topco LLC | 1.2% | 2,605,181 | 0% | 0.11% | $277,779,211 |
| UBS Group AG | 1.2% | 2,584,446 | +49% | 0.04% | $275,553,633 |
| CITADEL ADVISORS LLC | 1.2% | 2,556,973 | +17% | 0.16% | $272,624,461 |
| FRANKLIN RESOURCES INC | 1.1% | 2,273,222 | -13% | 0.05% | $242,371,000 |
| MAVERICK CAPITAL LTD | 1% | 2,150,762 | 2.1% | $229,314,244 | |
| MILLENNIUM MANAGEMENT LLC | 0.96% | 2,048,005 | +77% | 0.15% | $218,358,293 |
| Qube Research & Technologies Ltd | 0.78% | 1,682,334 | +1033% | 0.2% | $179,370,451 |
| WESTFIELD CAPITAL MANAGEMENT CO LP | 0.76% | 1,629,561 | +11% | 0.57% | $173,743,795 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
50
Latest
Q2 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 223,108,503 | $23,753,413,910 | +$93,668,798 | $106.62 | 661 |
| 2026 Q1 | 218,850,512 | $35,371,088,878 | +$548,539,245 | $163.52 | 671 |
| 2025 Q4 | 212,495,904 | $36,991,159,578 | +$201,286,840 | $174.04 | 674 |
| 2025 Q3 | 210,868,315 | $30,324,118,550 | +$447,494,143 | $144.01 | 563 |
| 2025 Q2 | 210,375,071 | $21,148,644,502 | +$1,358,877,009 | $100.64 | 513 |
| 2025 Q1 | 197,789,205 | $15,117,195,698 | +$439,219,800 | $76.29 | 436 |
| 2024 Q4 | 192,544,545 | $13,293,875,240 | +$244,780,319 | $69.04 | 434 |
| 2024 Q3 | 188,054,494 | $13,732,893,406 | +$900,536,797 | $73.00 | 411 |
| 2024 Q2 | 175,240,601 | $11,740,766,805 | +$1,771,359,793 | $67.00 | 375 |
| 2024 Q1 | 149,761,616 | $4,062,731,615 | -$1,104,814 | $27.13 | 284 |
| 2023 Q4 | 149,731,871 | $4,640,473,667 | +$24,712,854 | $30.99 | 269 |
| 2023 Q3 | 147,357,091 | $3,720,846,962 | +$68,976,618 | $25.25 | 249 |
| 2023 Q2 | 146,401,839 | $3,087,320,690 | +$30,211,671 | $21.10 | 221 |
| 2023 Q1 | 145,487,988 | $2,479,157,946 | +$29,238,110 | $17.05 | 229 |
| 2022 Q4 | 143,724,717 | $2,870,747,315 | +$305,150,296 | $19.98 | 224 |
| 2022 Q3 | 127,521,278 | $2,746,157,362 | -$212,666,313 | $21.54 | 229 |
| 2022 Q2 | 129,190,615 | $2,547,619,834 | +$40,332,207 | $19.72 | 200 |
| 2022 Q1 | 126,479,239 | $2,971,923,265 | +$75,140,734 | $23.50 | 211 |
| 2021 Q4 | 123,318,469 | $3,358,792,092 | -$21,477,249 | $27.24 | 201 |
| 2021 Q3 | 123,374,100 | $3,397,087,163 | +$40,469,427 | $27.54 | 184 |
| 2021 Q2 | 121,478,330 | $3,456,376,124 | +$431,176,988 | $28.46 | 194 |
| 2021 Q1 | 106,602,088 | $3,631,335,192 | -$6,653,428 | $34.06 | 194 |
| 2020 Q4 | 107,580,874 | $3,581,395,788 | -$44,371,673 | $33.29 | 202 |
| 2020 Q3 | 108,714,504 | $3,495,053,137 | -$56,966,505 | $32.14 | 195 |
| 2020 Q2 | 110,715,810 | $3,045,474,894 | +$374,929,259 | $27.54 | 183 |