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XENE in the 13F filings

Xenon Pharmaceuticals Inc · CUSIP 98420N105

Sector · Pharmaceuticals and biotechnologyTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Pharmaceutical preparations
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
27
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 4 listed it in both
Shares listed
30,533,382
combined, among listed positions
Reported value
$1.8bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 22 buyers (opened or added shares) and 9 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +4,839,429.

Managers listing XENE in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

27 of 27 holders

ActionFiling
Fidelity (FMR LLC)10,818,491$629munder 0.1%Added+1,898,24115 May 2026 (the filing on sec.gov)
Wellington Management Group LLP4,829,641$281m0.05%Added+64,86215 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd4,175,982$243m0.12%Added+91,94818 May 2026 (the filing on sec.gov)
Citadel Advisors LLC2,652,990$154munder 0.1%Added+1,331,77715 May 2026 (the filing on sec.gov)
Holocene Advisors LP1,518,686$88m0.21%Added+236,60515 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc1,329,591$77munder 0.1%Added+467,29115 May 2026 (the filing on sec.gov)
AllianceBernstein LP1,403,297$63munder 0.1%Trimmed-190,51715 May 2026 (the filing on sec.gov)
Capital World Investors840,072$49munder 0.1%Added+184,33513 May 2026 (the filing on sec.gov)
Two Sigma Investments LP606,085$35munder 0.1%Added+169,34215 May 2026 (the filing on sec.gov)
Tudor Investment Corp495,591$29m0.05%Added+241,58915 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC324,722$19m0.13%Newnew15 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC300,500$17munder 0.1%Newnew14 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC233,905$14munder 0.1%Added+149,54515 May 2026 (the filing on sec.gov)
Millennium Management LLC201,785$12munder 0.1%Trimmed-433,27115 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP177,137$10munder 0.1%Added+168,81815 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP173,425$10m0.08%Newnew14 May 2026 (the filing on sec.gov)
Woodline Partners LP150,302$8.7munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC130,438$7.6munder 0.1%Trimmed-48,30927 Oct 2026 (the filing on sec.gov)
Invesco Ltd59,103$3.4munder 0.1%Added+8,15612 May 2026 (the filing on sec.gov)
Verition Fund Management LLC55,000$3.2munder 0.1%Trimmed-38,75615 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.18,940$1.1munder 0.1%Trimmed-11,91115 May 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP14,072$818kunder 0.1%Newnew13 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP12,041$700kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
AQR Capital Management LLC7,279$423kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Jane Street Group LLC3,468$202kunder 0.1%Newnew12 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (10)

Exited (4)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
7 in Q3 2024 to 9 in Q2 2026

Tracked managers listing it, at least.

051015201520162017201820192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
XENE by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20141$12mn.a.n.a.
Q1 20151$11mn.a.n.a.
Q3 20151$8.5mn.a.n.a.
Q4 20151$8.3mn.a.n.a.
Q1 20161$7.2mn.a.n.a.
Q2 20161$6.1mn.a.n.a.
Q3 20161$8.3mn.a.n.a.
Q4 20161$9.4mn.a.n.a.
Q1 20171$5.7mn.a.n.a.
Q2 20172$4.9mn.a.n.a.
Q3 20172$5.0mn.a.n.a.
Q4 20172$5.1mn.a.n.a.
Q1 20182$8.9mn.a.n.a.
Q2 20183$17mn.a.n.a.
Q3 20185$21mn.a.n.a.
Q4 20183$9.5mn.a.n.a.
Q1 20194$24mn.a.n.a.
Q2 20193$19mn.a.n.a.
Q3 20193$17mn.a.n.a.
Q4 20193$25mn.a.n.a.
Q1 20202$18mn.a.n.a.
Q2 20203$21mn.a.n.a.
Q1 20211$14mn.a.n.a.
Q2 20211$17mn.a.n.a.
Q3 20212$20mn.a.n.a.
Q4 20214$205mn.a.n.a.
Q1 20226$215mn.a.n.a.
Q2 20227$230mn.a.n.a.
Q3 20227$330mn.a.n.a.
Q4 20228$303mn.a.n.a.
Q1 20239$259mn.a.n.a.
Q2 20235$222mn.a.n.a.
Q3 20237$220mn.a.n.a.
Q4 202311$590m83
Q1 20246$396m05
Q2 20247$383m32
Q3 20247$428m32
Q4 20246$400m23
Q1 20255$343m22
Q2 20255$224m41
Q3 20255$415m40
Q4 20256$501m1212
Q1 20268$1.3bn229
Q2 20269$1.2bn1715

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

XENE and LLY →XENE and JNJ →XENE and VRTX →Choose a stock to compare with XENE →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own XENE, latest filings →Back to the 13F Explorer →