Company · Ownership research

Xenon Pharmaceuticals Inc. XENE

CIK 0001582313 · CUSIP 98420N105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 98420N105 (XENE), not CUSIP 98420N905 (XENE), CUSIP 98420N955 (XENE), and does not merge CUSIPs.

This page lists the top 20 of 210 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	FMR LLC CIK 315066 · View history	$294.99M 7,525,290 shares	0.02%	+607.61K(+8.80%)Added	SEC filing ↗ Feb 13, 2025	▾
02	Avoro Capital Advisors LLC CIK 1633313 · View history	$222.13M 5,666,666 shares	3.14%	0(0.00%)Unchanged	SEC filing ↗ Feb 14, 2025	▾
03	Driehaus Capital Management LLC CIK 938206 · View history	$177.21M 4,520,595 shares	1.46%	-75.13K(-1.60%)Reduced	SEC filing ↗ Feb 14, 2025	▾
04	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · Amended · View history	$148.08M 3,777,611 shares	0.03%	-65.84K(-1.70%)Reduced	SEC filing ↗ Feb 12, 2025	▾
05	BRAIDWELL LP CIK 1920938 · View history	$114.23M 2,913,964 shares	3.39%	+206.71K(+7.60%)Added	SEC filing ↗ Feb 14, 2025	▾
06	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$112.43M 2,866,755 shares	0.06%	+314.36K(+12.30%)Added	SEC filing ↗ Feb 14, 2025	▾
07	COMMODORE CAPITAL LP CIK 1831942 · View history	$107.41M 2,740,000 shares	7.87%	+40.00K(+1.50%)Added	SEC filing ↗ Feb 14, 2025	▾
08	Polar Capital Holdings Plc CIK 1837309 · View history	$105.75M 2,697,657 shares	0.59%	+253.01K(+10.30%)Added	SEC filing ↗ Feb 14, 2025	▾
09	Capital International Investors CIK 1562230 · View history	$99.85M 2,547,210 shares	0.02%	-33.96K(-1.30%)Reduced	SEC filing ↗ Feb 13, 2025	▾
10	Capital World Investors CIK 1422849 · View history	$89.95M 2,294,537 shares	0.01%	-387.00K(-14.40%)Reduced	SEC filing ↗ Feb 13, 2025	▾
11	BlackRock, Inc. CIK 2012383 · View history	$82.53M 2,105,236 shares	0.00%	-326(0.00%)Reduced	SEC filing ↗ Feb 7, 2025	▾
12	ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history	$73.05M 1,863,473 shares	0.13%	-220.50K(-10.60%)Reduced	SEC filing ↗ Feb 14, 2025	▾
13	Pictet Asset Management Holding SA CIK 1993888 · View history	$58.66M 1,496,511 shares	0.06%	-32.30K(-2.10%)Reduced	SEC filing ↗ Feb 12, 2025	▾
14	ALLIANCEBERNSTEIN L.P. CIK 1109448 · View history	$56.57M 1,443,180 shares	0.02%	+18.45K(+1.30%)Added	SEC filing ↗ Feb 12, 2025	▾
15	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$56.36M 1,437,831 shares	0.03%	-65.98K(-4.40%)Reduced	SEC filing ↗ Feb 14, 2025	▾
16	JPMORGAN CHASE & CO CIK 19617 · View history	$53.19M 1,356,895 shares	0.00%	+380.11K(+38.90%)Added	SEC filing ↗ Feb 12, 2025	▾
17	Rock Springs Capital Management LP CIK 1595725 · View history	$49.07M 1,251,859 shares	1.87%	-64.62K(-4.90%)Reduced	SEC filing ↗ Feb 14, 2025	▾
18	Affinity Asset Advisors, LLC CIK 1773195 · View history	$45.52M 1,161,237 shares	7.11%	+17.22K(+1.50%)Added	SEC filing ↗ Feb 13, 2025	▾
19	First Light Asset Management, LLC CIK 1600004 · View history	$45.49M 1,160,580 shares	4.35%	-21.08K(-1.80%)Reduced	SEC filing ↗ Feb 14, 2025	▾
20	WESTFIELD CAPITAL MANAGEMENT CO LP CIK 1177719 · View history	$45.36M 1,157,189 shares	0.20%	+487.59K(+72.80%)Added	SEC filing ↗ Feb 11, 2025	▾

Showing 20 / 210 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

210

Cancelled or null records excluded

Disclosed shares

76,301,942

Not deduplicated across managers

Disclosed value

$2.99B

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.

Xenon Pharmaceuticals Inc. · Q4 2024

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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.