Security key
457669307
INSMED Inc - Common stock, par value $0.01 per share (INSM)
CUSIP: 457669307
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / Common stock, par value $0.01 per share
- Total 13F shares
- 210,868,315
- Total 13F value
- $30,324,118,550
- Share change
- +679,537
- Put/Call ratio
- 113%
- SEC-reported price per share
- $144.01
- Number of holders
- 563
- Value change
- +$447,494,143
- Number of buys
- 319
- Number of sells
- 268
- Shares outstanding
- 220,545,149
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
563
Top holders
10
INSM full security history
Ownership snapshot
Full 13F holder table
INSMED Inc SEC filings
INSMED Inc company facts
Broader feeds
Ownership snapshot
Top reported holders of INSM - INSMED Inc - Common stock, par value $0.01 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
PRICE T ROWE ASSOCIATES I...
Disclosed value leader
Darwin Global Management,...
Comparable rows
15/15
Latest evidence
30 Jun 2025
13F
13D/G
Lead comparable stake: 3.3%
13D/G row: PRICE T ROWE ASSOCIATES INC /MD/
Showing 1-6 of 15 holder rows.
Quick read
PRICE T ROWE ASSOCIATES INC /MD/ leads the comparable SEC ownership view at 3.3%.
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 PRICE T ROWE ASSOCIATES INC /MD/'s linked filing trail.
Comparable ownership
Top 5
PRICE T ROWE ASSOCIATES INC /MD/
3.3%
Darwin Global Management, Ltd.
8.8%
VANGUARD GROUP INC
8%
JPMORGAN CHASE & CO
7.1%
BlackRock, Inc.
5.1%
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 |
|---|---|---|---|---|---|
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
13D/G
Company · T. Rowe Price Associates, Inc.
|
3.3%
from 13D/G
|
$1,130,259,000
11,230,705 shares
|
— | 30 Jun 2025 |
| Darwin Global Management, Ltd. |
13F
Company
|
8.8%
|
$1,924,596,343
19,344,621 shares
|
— | 30 Jun 2025 |
| VANGUARD GROUP INC |
13F
Company
|
8%
|
$1,775,741,675
17,644,492 shares
|
— | 30 Jun 2025 |
| JPMORGAN CHASE & CO |
13F
Company
|
7.1%
|
$1,573,647,331
15,636,399 shares
|
— | 30 Jun 2025 |
| BlackRock, Inc. |
13F
Company
|
5.1%
|
$1,121,374,365
11,142,432 shares
|
— | 30 Jun 2025 |
| BAKER BROS. ADVISORS LP |
13F
Company
|
3.5%
|
$776,226,256
7,712,900 shares
|
— | 30 Jun 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 Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
563
Shares
210,868,315
Rows available
563
| 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 Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
513
Q3 2025 holders
563
Holder diff
50
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|