L3VLUP
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
33
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 15 listed it in both
Shares listed
53,262,334
combined, among listed positions
Reported value
$3.0bn
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: 14 buyers (opened or added shares) and 26 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +5,086,170.

Managers listing BMRN 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.

33 of 33 holders

ActionFiling
Dodge & Cox14,561,759$823m0.45%Trimmed-10,62514 May 2026 (the filing on sec.gov)
AQR Capital Management LLC7,676,541$429m0.20%Added+989,62515 May 2026 (the filing on sec.gov)
Viking Global Investors LP7,062,077$399m1.12%Added+1,025,14115 May 2026 (the filing on sec.gov)
Citadel Advisors LLC4,512,634$255munder 0.1%Added+3,147,94315 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)3,567,031$202munder 0.1%Added+1,729,96015 May 2026 (the filing on sec.gov)
Capital Research Global Investors3,491,386$197munder 0.1%Added+944,09913 May 2026 (the filing on sec.gov)
Millennium Management LLC3,010,308$170m0.07%Trimmed-27,30815 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC1,362,752$77m0.10%Newnew15 May 2026 (the filing on sec.gov)
Point72 Asset Management LP1,199,206$68m0.09%Added+760,38915 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC1,024,871$58m0.09%Trimmed-300,10014 May 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP974,776$55m0.19%Added+304,77413 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd857,010$48munder 0.1%Added+580,68018 May 2026 (the filing on sec.gov)
Wellington Management Group LLP716,523$40munder 0.1%Trimmed-68,57215 May 2026 (the filing on sec.gov)
Freestone Grove Partners LP606,187$34m0.24%Added+114,28515 May 2026 (the filing on sec.gov)
Invesco Ltd419,411$24munder 0.1%Trimmed-38,19312 May 2026 (the filing on sec.gov)
Walleye Capital LLC364,246$21m0.09%Added+141,77913 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC359,702$20munder 0.1%Trimmed-1,468,64215 May 2026 (the filing on sec.gov)
Man Group PLC309,659$17munder 0.1%Trimmed-51,83615 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.282,460$16munder 0.1%Trimmed-721,56915 May 2026 (the filing on sec.gov)
AllianceBernstein LP248,157$15munder 0.1%Trimmed-16,75915 May 2026 (the filing on sec.gov)
Bridgewater Associates LP206,911$12m0.05%Trimmed-23,05015 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc176,275$10.0munder 0.1%Added+18,69615 May 2026 (the filing on sec.gov)
Caxton Associates LLP49,308$2.8m0.06%Trimmed-103,44414 May 2026 (the filing on sec.gov)
Two Sigma Investments LP44,475$2.5munder 0.1%Trimmed-25,29115 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP44,179$2.5munder 0.1%Trimmed-148,17314 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.

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.
16 in Q3 2024 to 12 in Q2 2026

Tracked managers listing it, at least.

01020302014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
BMRN by quarter
QuarterHoldersReported valueBuyersSellers
Q2 201314$2.3bnn.a.n.a.
Q3 201314$2.8bnn.a.n.a.
Q4 201311$2.5bnn.a.n.a.
Q1 20148$2.1bnn.a.n.a.
Q2 20149$1.9bnn.a.n.a.
Q3 20148$2.5bnn.a.n.a.
Q4 201412$3.3bnn.a.n.a.
Q1 201515$5.4bnn.a.n.a.
Q2 201514$6.3bnn.a.n.a.
Q3 201520$5.1bnn.a.n.a.
Q4 201514$4.8bnn.a.n.a.
Q1 201610$3.4bnn.a.n.a.
Q2 201611$2.7bnn.a.n.a.
Q3 201617$3.7bnn.a.n.a.
Q4 201613$3.0bnn.a.n.a.
Q1 201711$3.2bnn.a.n.a.
Q2 201714$3.2bnn.a.n.a.
Q3 201716$3.9bnn.a.n.a.
Q4 201716$3.8bnn.a.n.a.
Q1 201817$3.3bnn.a.n.a.
Q2 201814$3.6bnn.a.n.a.
Q3 201814$3.6bnn.a.n.a.
Q4 201813$3.0bnn.a.n.a.
Q1 201915$3.1bnn.a.n.a.
Q2 201919$3.0bnn.a.n.a.
Q3 201913$2.1bnn.a.n.a.
Q4 201915$3.0bnn.a.n.a.
Q1 202014$2.5bnn.a.n.a.
Q2 202011$3.6bnn.a.n.a.
Q3 202012$3.0bnn.a.n.a.
Q4 202012$3.7bnn.a.n.a.
Q1 202110$3.1bnn.a.n.a.
Q2 202111$3.4bnn.a.n.a.
Q3 202114$3.0bnn.a.n.a.
Q4 202114$3.4bnn.a.n.a.
Q1 202219$3.0bnn.a.n.a.
Q2 202221$2.9bnn.a.n.a.
Q3 202225$3.1bnn.a.n.a.
Q4 202226$4.0bnn.a.n.a.
Q1 202320$3.3bnn.a.n.a.
Q2 202318$2.9bnn.a.n.a.
Q3 202318$2.9bnn.a.n.a.
Q4 202322$4.1bn148
Q1 202419$3.6bn164
Q2 202416$3.3bn106
Q3 202416$3.0bn98
Q4 202414$3.0bn112
Q1 202516$3.3bn123
Q2 202516$2.5bn125
Q3 202516$2.3bn105
Q4 202521$2.4bn2419
Q1 202615$2.6bn1426
Q2 202612$2.2bn1322

Compare with…

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

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

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