L3VLUP
Quarter end
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
33
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 14 listed it in both
Shares listed
61,608,413
combined, among listed positions
Reported value
$4.7bn
combined, at the quarter end

Among the 92 comparable managers: 22 buyers (opened or added shares) and 12 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +6,175,914.

Managers listing BBIO 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.

33 of 33 holders

ActionFiling
Viking Global Investors LP14,393,934$1.1bn2.92%Trimmed-1,583,91517 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd11,000,457$841m0.38%Added+2,259,37817 Feb 2026 (the filing on sec.gov)
Farallon Capital Management LLC8,998,463$688m2.98%Added+806,46317 Feb 2026 (the filing on sec.gov)
Invesco Ltd4,831,305$370munder 0.1%Added+902,64819 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc3,828,746$293munder 0.1%Added+2,261,18117 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)2,390,362$183munder 0.1%Added+689,61517 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP2,348,731$180munder 0.1%Added+1,329,53717 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.2,214,031$169m0.09%Trimmed-38,73117 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP2,050,746$157munder 0.1%Trimmed-277,96917 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP1,947,047$149m0.21%Trimmed-381,89417 Feb 2026 (the filing on sec.gov)
Capital Research Global Investors1,934,698$148munder 0.1%Added+1,57211 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP1,401,035$107m0.21%Trimmed-261,72017 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC698,182$53munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC638,883$49m0.17%Added+505,05117 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP487,376$37munder 0.1%Added+145,51017 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC341,795$26munder 0.1%Trimmed-292,09112 Feb 2026 (the filing on sec.gov)
Woodline Partners LP300,912$23m0.09%Added+102,59417 Feb 2026 (the filing on sec.gov)
Artisan Partners LP279,067$21munder 0.1%Trimmed-52,23517 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC268,899$21munder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC234,389$18munder 0.1%Trimmed-780,28817 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC221,245$17munder 0.1%Added+2,54927 Oct 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP173,523$13m0.14%Added+121,10517 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC134,517$10munder 0.1%Added+35,69017 Feb 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP125,302$9.6m0.08%Added+94,87417 Feb 2026 (the filing on sec.gov)
Freestone Grove Partners LP125,201$9.6m0.07%Added+31,73217 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.
8 in Q3 2024 to 18 in Q2 2026

Tracked managers listing it, at least.

051015202020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
BBIO by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20192$719mn.a.n.a.
Q3 20191$572mn.a.n.a.
Q4 20192$1.0bnn.a.n.a.
Q1 20203$824mn.a.n.a.
Q2 20204$926mn.a.n.a.
Q3 20204$1.1bnn.a.n.a.
Q4 20205$2.0bnn.a.n.a.
Q1 20215$1.9bnn.a.n.a.
Q2 20215$1.8bnn.a.n.a.
Q3 20214$1.4bnn.a.n.a.
Q4 20212$452mn.a.n.a.
Q1 20222$276mn.a.n.a.
Q2 20222$246mn.a.n.a.
Q3 20223$271mn.a.n.a.
Q4 20222$204mn.a.n.a.
Q1 20234$477mn.a.n.a.
Q2 20232$463mn.a.n.a.
Q3 20239$898mn.a.n.a.
Q4 20239$1.3bn17
Q1 20247$1.1bn52
Q2 20244$826m20
Q3 20248$927m70
Q4 20247$1.2bn43
Q1 20259$1.6bn63
Q2 202515$2.3bn114
Q3 202514$2.3bn59
Q4 202518$4.3bn2212
Q1 202620$4.4bn2014
Q2 202618$4.5bn2415

Compare with…

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

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

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