L3VLUP
Quarter end
31 Dec 2025
the date the book describes
Filed
19 Feb 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
30
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 4 listed it in both
Shares listed
31,707,823
combined, among listed positions
Reported value
$247m
combined, at the quarter end

Among the 92 comparable managers: 13 buyers (opened or added shares) and 22 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -23,320.

Managers listing BCRX in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

30 of 30 holders

ActionFiling
Janus Henderson Group Ltd7,404,386$58munder 0.1%Added+7,310,74517 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP4,515,317$35munder 0.1%Added+95,68817 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP4,089,112$32m0.06%Trimmed-151,60017 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC2,128,821$17munder 0.1%Trimmed-11,71312 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC1,659,192$13munder 0.1%Added+550,53213 Feb 2026 (the filing on sec.gov)
Invesco Ltd1,354,897$11munder 0.1%Added+392,52119 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC1,298,902$10munder 0.1%Trimmed-60,98017 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,247,466$9.7munder 0.1%Trimmed-461,87017 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP1,213,576$9.5munder 0.1%Added+975,38917 Feb 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP1,017,374$7.9munder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC704,291$5.5munder 0.1%Trimmed-295,49417 Feb 2026 (the filing on sec.gov)
PDT Partners LLC683,416$5.3m0.35%Held017 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP671,693$5.2munder 0.1%Added+425,93217 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC649,357$5.1munder 0.1%Trimmed-1,198,98912 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)560,182$4.4munder 0.1%Trimmed-93,63217 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC449,743$3.5munder 0.1%Trimmed-507,27817 Feb 2026 (the filing on sec.gov)
Man Group PLC407,850$3.2munder 0.1%Added+53,36617 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP278,190$2.2munder 0.1%Trimmed-14317 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC251,670$2.0munder 0.1%Added+24,60613 Feb 2026 (the filing on sec.gov)
Bridgewater Associates LP235,572$1.8munder 0.1%Trimmed-175,93113 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc177,392$1.4munder 0.1%Added+16,04417 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC141,449$1.1munder 0.1%Trimmed-25,39217 Feb 2026 (the filing on sec.gov)
Millennium Management LLC137,626$1.1munder 0.1%Trimmed-323,32117 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp114,541$893kunder 0.1%Added+16,36617 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP86,520$675kunder 0.1%Trimmed-7,01017 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, 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.

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.
3 in Q3 2024 to 7 in Q2 2026

Tracked managers listing it, at least.

0246820142017201820192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
BCRX by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20131$692kn.a.n.a.
Q1 20141$632kn.a.n.a.
Q2 20142$34mn.a.n.a.
Q2 20153$165mn.a.n.a.
Q3 20152$114mn.a.n.a.
Q3 20161$714kn.a.n.a.
Q4 20161$828kn.a.n.a.
Q1 20173$28mn.a.n.a.
Q2 20171$718kn.a.n.a.
Q1 20181$2.7mn.a.n.a.
Q2 20181$64mn.a.n.a.
Q3 20182$95mn.a.n.a.
Q4 20181$99mn.a.n.a.
Q1 20191$100mn.a.n.a.
Q2 20191$8.5mn.a.n.a.
Q3 20193$20mn.a.n.a.
Q4 20193$39mn.a.n.a.
Q1 20204$15mn.a.n.a.
Q2 20204$53mn.a.n.a.
Q3 20202$4.8mn.a.n.a.
Q4 20203$33mn.a.n.a.
Q1 20211$31mn.a.n.a.
Q2 20213$88mn.a.n.a.
Q3 20216$119mn.a.n.a.
Q4 20214$79mn.a.n.a.
Q1 20225$83mn.a.n.a.
Q2 20224$60mn.a.n.a.
Q3 20227$85mn.a.n.a.
Q4 20228$111mn.a.n.a.
Q1 20236$59mn.a.n.a.
Q2 20234$53mn.a.n.a.
Q3 20234$44mn.a.n.a.
Q4 20232$15m11
Q1 20243$16m30
Q2 20243$30m12
Q3 20243$34m21
Q4 20242$23m20
Q1 20254$50m40
Q2 20257$170m61
Q3 20255$74m40
Q4 20256$138m1322
Q1 20266$170m1716
Q2 20267$187m2212

Compare with…

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

BCRX and GILD →BCRX and AMGN →BCRX and ARGX →Choose a stock to compare with BCRX →

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 BCRX, latest filings →Back to the 13F Explorer →