Company · Ownership research

INSMED Inc INSM

CIK 0001104506 · CUSIP 457669307

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 457669307 (INSM), not CUSIP 457669907 (INSM), CUSIP 457669957 (INSM), and does not merge CUSIPs.

This page lists the top 20 of 290 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	VANGUARD GROUP INC CIK 102909 · View history	$393.64M 14,509,235 shares	0.01%	+383.71K(+2.70%)Added	SEC filing ↗ May 10, 2024	▾
02	BlackRock Inc. CIK 1364742 · View history	$320.13M 11,799,701 shares	0.01%	+307.42K(+2.70%)Added	SEC filing ↗ May 10, 2024	▾
03	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$292.17M 10,769,366 shares	0.04%	+5.59K(+0.10%)Added	SEC filing ↗ May 15, 2024	▾
04	FMR LLC CIK 315066 · View history	$252.82M 9,318,894 shares	0.02%	+4.23M(+83.00%)Added	SEC filing ↗ May 13, 2024	▾
05	STATE STREET CORP CIK 93751 · View history	$160.21M 5,905,127 shares	0.01%	-24.81K(-0.40%)Reduced	SEC filing ↗ May 15, 2024	▾
06	Deep Track Capital, LP CIK 1856083 · View history	$129.78M 4,783,679 shares	3.73%	-566.32K(-10.60%)Reduced	SEC filing ↗ May 15, 2024	▾
07	Palo Alto Investors LP CIK 1306923 · View history	$120.01M 4,423,369 shares	13.53%	-1.09M(-19.70%)Reduced	SEC filing ↗ May 15, 2024	▾
08	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC CIK 1644956 · View history	$114.35M 4,214,719 shares	0.30%	-41.97K(-1.00%)Reduced	SEC filing ↗ May 8, 2024	▾
09	MACQUARIE GROUP LTD CIK 1418333 · View history	$105.79M 3,899,504 shares	0.12%	-751.99K(-16.20%)Reduced	SEC filing ↗ May 14, 2024	▾
10	FRANKLIN RESOURCES INC CIK 38777 · View history	$96.77M 3,567,013 shares	0.03%	+170.29K(+5.00%)Added	SEC filing ↗ May 13, 2024	▾
11	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$93.64M 3,451,580 shares	0.06%	-2.40M(-41.00%)Reduced	SEC filing ↗ May 15, 2024	▾
12	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$85.85M 3,163,751 shares	0.01%	+94.37K(+3.10%)Added	SEC filing ↗ May 13, 2024	▾
13	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$74.21M 2,735,338 shares	0.02%	+452.85K(+19.80%)Added	SEC filing ↗ May 15, 2024	▾
14	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$60.49M 2,229,463 shares	0.03%	+826.37K(+58.90%)Added	SEC filing ↗ May 15, 2024	▾
15	ALLIANCEBERNSTEIN L.P. CIK 1109448 · View history	$58.23M 2,146,479 shares	0.02%	-1.42K(-0.10%)Reduced	SEC filing ↗ May 14, 2024	▾
16	Bellevue Group AG CIK 1674546 · View history	$58.11M 2,141,843 shares	0.89%	-149.12K(-6.50%)Reduced	SEC filing ↗ May 15, 2024	▾
17	Bank of New York Mellon Corp CIK 1390777 · View history	$55.65M 2,051,311 shares	0.01%	-305.55K(-13.00%)Reduced	SEC filing ↗ Apr 25, 2024	▾
18	SUVRETTA CAPITAL MANAGEMENT, LLC CIK 1569064 · View history	$54.88M 2,023,000 shares	2.32%	-661.49K(-24.60%)Reduced	SEC filing ↗ May 15, 2024	▾
19	RTW INVESTMENTS, LP CIK 1493215 · View history	$50.60M 1,865,108 shares	0.75%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2024	▾
20	Capital International Investors CIK 1562230 · View history	$43.97M 1,620,814 shares	0.01%	+1.62MNew	SEC filing ↗ May 14, 2024	▾

Showing 20 / 290 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

290

Cancelled or null records excluded

Disclosed shares

149,963,552

Not deduplicated across managers

Disclosed value

$4.07B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

INSMED Inc · Q1 2024

Explore all 290 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.