Ticker · CUSIP 090572207

BIO

BIO RAD LABS INC

Healthcare·Medical Devices

···Share

Holders (tracked)

Combined shares

4,048,163

Combined value

$1.23B

Last close

$299.02

Quarter

2025Q4

Price is -1.3% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$299.02+60.84 (+25.54%)H $339.75 · L $216.56 · Avg Vol 275K

Tracked holders · last 8 quarters

-1 vs previous quarter over the last 8.

SEC event timeline

25 events

Jonathan Auerbach (Hound Partners) trimmed2026-02-17
−60,695 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) trimmed2026-02-17
−40,826 shares · 2025Q4
Position
D.E. Shaw & Co. added2026-02-17
+1,530 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−2,249 shares · 2025Q4
Position
AQR Capital Management added2026-02-17
+8,224 shares · 2025Q4
Position
Steve Cohen (Point72) exited2026-02-17
−10,195 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+794 shares · 2025Q4
Position
Southeastern Asset (Longleaf) trimmed2026-02-13
−9,624 shares · 2025Q4
Position
Ray Dalio (Bridgewater Associates) exited2026-02-13
−10,632 shares · 2025Q4
Position
John Rogers (Ariel Investments) trimmed2026-02-13
−44,808 shares · 2025Q4
Position
Norges Bank (Norway SWF) opened position2026-02-10
+114,194 shares · 2025Q4
Position
Ken Fisher (Fisher Asset Mgmt) trimmed2026-02-09
−2,371 shares · 2025Q4
Position
First Eagle Investment Management added2026-02-04
+50,154 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2025-11-14
−227,393 shares · 2025Q3
Position
Steve Cohen (Point72) opened position2025-11-14
+10,195 shares · 2025Q3
Position
AQR Capital Management added2025-11-14
+3,782 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+38,654 shares · 2025Q3
Position
Southeastern Asset (Longleaf) trimmed2025-11-14
−78,031 shares · 2025Q3
Position
Jonathan Auerbach (Hound Partners) trimmed2025-11-14
−77,973 shares · 2025Q3
Position
John Rogers (Ariel Investments) trimmed2025-11-14
−9,144 shares · 2025Q3
Position
Ray Dalio (Bridgewater Associates) opened position2025-11-13
+10,632 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-13
−128,408 shares · 2025Q3
Position
Ken Fisher (Fisher Asset Mgmt) trimmed2025-11-12
−4,277 shares · 2025Q3
Position
Norges Bank (Norway SWF) trimmed2025-11-12
−32,045 shares · 2024Q3
Position
First Eagle Investment Management added2025-11-12
+3,006 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for BIO →

Follow-the-investor returns

If you'd copied each holder of BIO…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Mario Gabelli (GAMCO)	2016Q1	$136.72	+118.7%	$8.0M
Ken Fisher (Fisher Asset Mgmt)	2016Q1	$217.14	+37.7%	$39.2M
Norges Bank (Norway SWF)	2016Q1	$253.48	+18.0%	$34.1M
First Eagle Investment Management	2023Q2	$254.04	+17.7%	$768.6M
Jonathan Auerbach (Hound Partners)	2020Q1	$284.06	+5.3%	$12.9M
Ken Griffin (Citadel Advisors)	2016Q1	$297.83	+0.4%	$2.8M
Ken Griffin (Citadel Advisors)	2016Q1	$297.83	+0.4%	$2.8M
John Rogers (Ariel Investments)	2016Q1	$301.80	-0.9%	$228.7M
D.E. Shaw & Co.	2016Q1	$311.43	-4.0%	$1.4M
AQR Capital Management	2016Q1	$313.14	-4.5%	$12.0M
T. Rowe Price	2016Q1	$319.77	-6.5%	$22.8M
Izzy Englander (Millennium Mgmt)	2016Q1	$320.25	-6.6%	$6.6M
Izzy Englander (Millennium Mgmt)	2016Q1	$320.25	-6.6%	$6.6M
Southeastern Asset (Longleaf)	2023Q2	$367.08	-18.5%	$68.1M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions1

Norges Bank (Norway SWF)
+114,194
$34.6M

Added to4

First Eagle Investment Management
+50,154
$15.2M
AQR Capital Management
+8,224
$2.5M
D.E. Shaw & Co.
+1,530
$464K
T. Rowe Price
+794
$241

Trimmed6

Jonathan Auerbach (Hound Partners)
−60,695
$18.4M
John Rogers (Ariel Investments)
−44,808
$13.6M
Ken Griffin (Citadel Advisors)
−40,826
$12.4M
Southeastern Asset (Longleaf)
−9,624
$2.9M
Ken Fisher (Fisher Asset Mgmt)
−2,371
$718K
Izzy Englander (Millennium Mgmt)
−2,249
$681K

Exited2

Ray Dalio (Bridgewater Associates)
−10,632
$3.0M
Steve Cohen (Point72)
−10,195
$2.9M

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	23	3,619,451	$119.80B	—
2022Q2	21	3,256,963	$99.40B	-2
2022Q3	22	3,307,696	$1.38B	+1
2022Q4	23	3,187,889	$1.34B	+1
2023Q1	24	3,080,216	$1.48B	+1
2023Q2	23	3,132,350	$1.19B	-1
2023Q3	21	3,059,680	$1.10B	-2
2023Q4	18	2,952,333	$953.3M	-3
2024Q1	19	2,879,860	$996.1M	+1
2024Q2	18	3,400,823	$928.8M	-1
2024Q3	20	2,830,054	$946.8M	+2
2024Q4	19	2,679,310	$880.2M	-1
2025Q1	15	3,454,419	$841.3M	-4
2025Q2	14	4,473,336	$1.08B	-1
2025Q3	15	4,041,567	$1.13B	+1
2025Q4	14	4,048,163	$1.23B	-1

Who owns BIO

14 super-investors · 2025Q4

Tracked stake

4.05M

Combined value

$1.23B

% of shares outstanding

—

shares-out unknown

Quarter action mix

New1Added4Trim8Held1

#	Manager	Shares	Value	% of book	Last action
1	First Eagle Investment Management	2.57M	$779M	1.4%	Added+50.2K
2	John Rogers Ariel Investments	764.7K	$232M	2.5%	Trim−44.8K
3	Southeastern Asset Longleaf	227.6K	$69M	3.1%	Trim−9.6K
4	Ken Fisher Fisher Asset Mgmt	131.1K	$40M	0.0%	Trim−2.4K
5	Norges Bank Norway SWF	114.2K	$35M	0.0%	New+114.2K
6	T. Rowe Price	76.3K	$23M	0.0%	Added+794
7	Jonathan Auerbach Hound Partners	43.3K	$13M	1.8%	Trim−60.7K
8	AQR Capital Management	40.2K	$12M	0.0%	Added+8.2K
9	Mario Gabelli GAMCO	26.8K	$8M	0.1%	Held
10	Izzy Englander Millennium Mgmt	22.2K	$7M	0.0%	Trim−2.2K
11	Izzy Englander Millennium Mgmt	15.0K	$5M	0.0%	Trim−2.2K
12	Ken Griffin Citadel Advisors	9.5K	$3M	0.0%	Trim−40.8K
13	D.E. Shaw & Co.	4.8K	$1M	0.0%	Added+1.5K
14	Ken Griffin Citadel Advisors	2.1K	$636K	0.0%	Trim−40.8K

Recent moves

20 transactions

TRIMIzzy Englander (Millennium Mgmt)
−2,249 · 2025Q4
ADDAQR Capital Management
+8,224 · 2025Q4
TRIMJonathan Auerbach (Hound Partners)
−60,695 · 2025Q4
SOLDSteve Cohen (Point72)
−10,195 · 2025Q4
ADDD.E. Shaw & Co.
+1,530 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−40,826 · 2025Q4
ADDT. Rowe Price
+794 · 2025Q4
SOLDRay Dalio (Bridgewater Associates)
−10,632 · 2025Q4
TRIMJohn Rogers (Ariel Investments)
−44,808 · 2025Q4
TRIMSoutheastern Asset (Longleaf)
−9,624 · 2025Q4
NEWNorges Bank (Norway SWF)
+114,194 · 2025Q4
TRIMKen Fisher (Fisher Asset Mgmt)
−2,371 · 2025Q4
ADDFirst Eagle Investment Management
+50,154 · 2025Q4
TRIMJonathan Auerbach (Hound Partners)
−77,973 · 2025Q3
ADDT. Rowe Price
+38,654 · 2025Q3
TRIMIzzy Englander (Millennium Mgmt)
−227,393 · 2025Q3
TRIMSoutheastern Asset (Longleaf)
−78,031 · 2025Q3
NEWSteve Cohen (Point72)
+10,195 · 2025Q3
TRIMJohn Rogers (Ariel Investments)
−9,144 · 2025Q3
ADDAQR Capital Management
+3,782 · 2025Q3

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