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BIO in the 13F filings

Bio Rad Labs Inc · CUSIP 090572207

Sector · Medical devices and instrumentsTheme · Healthcare: biopharma and medtech· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 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
26
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 7 listed it in both
Shares listed
4,820,889
combined, among listed positions
Reported value
$1.3bn
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: 18 buyers (opened or added shares) and 14 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +480,790.

Managers listing BIO 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.

26 of 26 holders

ActionFiling
First Eagle Investment Management LLC2,602,772$726m1.23%Added+32,29914 May 2026 (the filing on sec.gov)
Capital World Investors450,000$125munder 0.1%Newnew13 May 2026 (the filing on sec.gov)
MFS Investment Management396,150$110munder 0.1%Trimmed-3,05714 May 2026 (the filing on sec.gov)
Capital Research Global Investors385,579$107munder 0.1%Trimmed-108,89313 May 2026 (the filing on sec.gov)
Southeastern Asset Management Inc162,804$45m2.23%Trimmed-64,82615 May 2026 (the filing on sec.gov)
Citadel Advisors LLC148,669$41munder 0.1%Added+139,18915 May 2026 (the filing on sec.gov)
Freestone Grove Partners LP147,605$41m0.29%Added+37,08115 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC102,800$29munder 0.1%Trimmed-17,83413 May 2026 (the filing on sec.gov)
AQR Capital Management LLC94,549$26munder 0.1%Added+54,35415 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc74,281$21munder 0.1%Trimmed-1,99015 May 2026 (the filing on sec.gov)
Man Group PLC67,436$19munder 0.1%Added+61,18515 May 2026 (the filing on sec.gov)
Invesco Ltd36,835$10munder 0.1%Added+1,77512 May 2026 (the filing on sec.gov)
Marshall Wace LLP33,217$9.3munder 0.1%Added+21,65715 May 2026 (the filing on sec.gov)
GAMCO Investors Inc26,750$7.5m0.07%Held014 May 2026 (the filing on sec.gov)
AllianceBernstein LP24,487$7.4munder 0.1%Added+1,20615 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP15,743$4.4munder 0.1%Newnew14 May 2026 (the filing on sec.gov)
Two Sigma Investments LP10,988$3.1munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.8,145$2.3munder 0.1%Added+3,31515 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd7,900$2.2munder 0.1%Held018 May 2026 (the filing on sec.gov)
Tudor Investment Corp5,161$1.4munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)4,198$1.2munder 0.1%Added+95915 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP3,875$1.1munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Millennium Management LLC3,294$918kunder 0.1%Trimmed-18,91215 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC3,029$844kunder 0.1%Added+1927 Oct 2026 (the filing on sec.gov)
Susquehanna International Group LLP2,938$819kunder 0.1%Newnew15 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 (7)

Exited (8)

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.
9 in Q3 2024 to 7 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.
BIO by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20135$24mn.a.n.a.
Q3 20134$22mn.a.n.a.
Q4 20132$13mn.a.n.a.
Q1 20143$34mn.a.n.a.
Q2 20144$33mn.a.n.a.
Q3 20145$22mn.a.n.a.
Q4 20145$41mn.a.n.a.
Q1 20158$145mn.a.n.a.
Q2 20156$170mn.a.n.a.
Q3 20157$201mn.a.n.a.
Q4 20157$186mn.a.n.a.
Q1 20166$182mn.a.n.a.
Q2 20164$188mn.a.n.a.
Q3 20164$224mn.a.n.a.
Q4 20167$317mn.a.n.a.
Q1 20179$340mn.a.n.a.
Q2 20178$298mn.a.n.a.
Q3 20174$294mn.a.n.a.
Q4 201713$478mn.a.n.a.
Q1 201813$524mn.a.n.a.
Q2 201815$657mn.a.n.a.
Q3 201816$686mn.a.n.a.
Q4 201816$498mn.a.n.a.
Q1 201915$689mn.a.n.a.
Q2 201914$614mn.a.n.a.
Q3 201916$801mn.a.n.a.
Q4 201912$585mn.a.n.a.
Q1 202012$695mn.a.n.a.
Q2 202019$1.3bnn.a.n.a.
Q3 202017$1.7bnn.a.n.a.
Q4 202013$2.2bnn.a.n.a.
Q1 202115$2.2bnn.a.n.a.
Q2 202118$2.7bnn.a.n.a.
Q3 202116$3.5bnn.a.n.a.
Q4 202119$3.3bnn.a.n.a.
Q1 202222$2.4bnn.a.n.a.
Q2 202215$1.2bnn.a.n.a.
Q3 202217$857mn.a.n.a.
Q4 202216$782mn.a.n.a.
Q1 202311$833mn.a.n.a.
Q2 202316$607mn.a.n.a.
Q3 202315$662mn.a.n.a.
Q4 202311$534m85
Q1 20247$342m46
Q2 20246$409m32
Q3 20249$708m71
Q4 202411$649m54
Q1 202510$612m63
Q2 20258$780m43
Q3 20258$983m43
Q4 20259$1.2bn1221
Q1 20268$1.2bn1814
Q2 20267$1.1bn1513

Compare with…

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

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

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