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Bio-Rad Laboratories Class A
BIO

396 hedge funds and large institutions have $5.46B invested in Bio-Rad Laboratories Class A in 2025 Q3 according to their latest regulatory filings, with 64 funds opening new positions, 120 increasing their positions, 139 reducing their positions, and 47 closing their positions.

New
Increased
Maintained
Reduced
Closed

115% more call options, than puts

Call options by funds: $1.99M | Put options by funds: $925K

36% more first-time investments, than exits

New positions opened: 64 | Existing positions closed: 47

18% more capital invested

Capital invested by funds: $4.63B → $5.46B (+$826M)

3% more funds holding

Funds holding: 383 → 396 (+13)

1.88% more ownership

Funds ownership: 86.68% → 88.56% (+1.9%)

0% more funds holding in top 10

Funds holding in top 10: 5 → 5 (0)

14% less repeat investments, than reductions

Existing positions increased: 120 | Existing positions reduced: 139

Holders
396
Holders Change
+13
Holders Change %
+3.39%
% of All Funds
5.2%
Holding in Top 10
5
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.07%
New
64
Increased
120
Reduced
139
Closed
47
Calls
$1.99M
Puts
$925K
Net Calls
+$1.06M
Net Calls Change
+$6.93M

Top Buyers

1
Capital Research Global Investors
Capital Research Global Investors
California
+$114M
2
UBS AM
UBS AM
Illinois
+$104M
3
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management
California
+$64.7M
4
MP
Mangrove Partners
Connecticut
+$34.5M
5
BTW
Boston Trust Walden
Massachusetts
+$26M

Top Sellers

1
Millennium Management
Millennium Management
New York
-$61.9M
2
Select Equity Group
Select Equity Group
New York
-$61.8M
3
TSW
Thompson Siegel & Walmsley
Virginia
-$24.1M
4
ECM
ExodusPoint Capital Management
New York
-$23.2M
5
Goldman Sachs
Goldman Sachs
New York
-$23M
Name Holding Trade Value Shares
Change 		Change in
Stake
First Eagle Investment Management
1
First Eagle Investment Management
New York
$707M +$818K +3,006 +0.1%
Vanguard Group
2
Vanguard Group
Pennsylvania
$503M -$14.4M -53,006 -3%
BlackRock
3
BlackRock
New York
$475M -$18.2M -66,810 -4%
Dimensional Fund Advisors
4
Dimensional Fund Advisors
Texas
$298M +$17.2M +63,370 +6%
VAM
5
Veritas Asset Management
United Kingdom
$237M -$5.2M -19,102 -2%
AI
6
Ariel Investments
Illinois
$227M -$2.49M -9,144 -1%
EARNEST Partners
7
EARNEST Partners
Georgia
$171M +$925K +3,398 +0.6%
State Street
8
State Street
Massachusetts
$160M -$3.47M -12,767 -2%
Bank of America
9
Bank of America
North Carolina
$129M +$2.11M +7,754 +2%
Capital Research Global Investors
10
Capital Research Global Investors
California
$117M +$114M +418,355 New
UBS AM
11
UBS AM
Illinois
$111M +$104M +380,422 +2,271%
FPA
12
First Pacific Advisors
California
$111M +$2.03M +7,465 +2%
Geode Capital Management
13
Geode Capital Management
Massachusetts
$98.2M +$4.38M +16,079 +5%
Parnassus Investments
14
Parnassus Investments
California
$88.4M -$514K -1,890 -0.6%
SEI Investments
15
SEI Investments
Pennsylvania
$79.2M +$4.65M +17,084 +6%
Mawer Investment Management
16
Mawer Investment Management
Alberta, Canada
$68.3M -$6.43M -23,640 -9%
Fuller & Thaler Asset Management
17
Fuller & Thaler Asset Management
California
$66.7M +$64.7M +237,903 New
SAM
18
Southeastern Asset Management
Tennessee
$66.5M -$21.2M -78,031 -25%
UBS Group
19
UBS Group
Switzerland
$64.7M +$8.15M +29,955 +15%
DM
20
Deerfield Management
New York
$63.4M – – –
Northern Trust
21
Northern Trust
Illinois
$63.4M -$136K -499 -0.2%
TSW
22
Thompson Siegel & Walmsley
Virginia
$61M -$24.1M -88,536 -29%
GKIM
23
GW&K Investment Management
Massachusetts
$51.5M +$9.97M +36,632 +25%
Charles Schwab
24
Charles Schwab
California
$50.5M -$4.8M -17,654 -9%
Royal Bank of Canada
25
Royal Bank of Canada
Ontario, Canada
$49.4M +$6.68M +24,533 +16%
1
2 3 4 5

BIO Hedge Fund Activity: Q3 2025 in Review

396 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Bio-Rad Laboratories Class A (BIO) for Q3 2025, worth a combined $5.46B — up 18% from $4.63B a quarter earlier.

Buyers outnumbered sellers: 64 funds opened new BIO positions and 47 closed out — a net gain of 17 holders — while 120 added to existing stakes and 139 trimmed.

The largest buyer was Capital Research Global Investors, opening a new position worth an estimated $114M. The largest seller was Millennium Management, cutting an estimated $61.9M.

  • 396 institutional investors held Bio-Rad Laboratories Class A (BIO) as of Q3 2025, up from 383 in Q2 2025.
  • Funds reported $5.46B of Bio-Rad Laboratories Class A stock for Q3 2025, up 18% quarter-over-quarter.
  • 64 funds opened new Bio-Rad Laboratories Class A positions in Q3 2025 and 47 closed out, a net change of +17 holders.
  • The largest Bio-Rad Laboratories Class A buyer in Q3 2025 was Capital Research Global Investors, an estimated $114M added.
  • The largest Bio-Rad Laboratories Class A seller in Q3 2025 was Millennium Management, an estimated $61.9M sold.

Based on aggregated 13F filings for Q3 2025.