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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

Rank Fund Capital Flow
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

Rank Fund Capital Flow
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
XT
401
XTX Topco
Cayman Islands
– -$3.08M -12,774 Closed
SP
402
SIH Partners
Delaware
– -$2.41M -10,000 Closed
CM
403
Capula Management
Cayman Islands
– -$2M -8,287 Closed
DC
404
Davenport & Co
Virginia
– -$1.14M -4,719 Closed
OTPPB
405
Ontario Teachers' Pension Plan Board
Ontario, Canada
– -$1.13M -4,702 Closed
ET
406
Entropy Technologies
New York
– -$1.06M -4,400 Closed
PL
407
Polianta Ltd
Jersey
– -$965K -4,000 Closed
Jacobs Levy Equity Management
408
Jacobs Levy Equity Management
New Jersey
– -$808K -3,349 Closed
JFG
409
Jefferies Financial Group
New York
– -$796K -3,300 Closed
GH
410
GAM Holding
Switzerland
– -$724K -3,000 Closed
QC
411
Quantessence Capital
New York
– -$564K -2,336 Closed
UWS
412
Unique Wealth Strategies
Illinois
– -$460K -1,907 Closed
QT
413
Quantbot Technologies
New York
– -$433K -1,794 Closed
SC
414
SummitTX Capital
Texas
– -$375K -1,553 Closed
PTC
415
Petrus Trust Company
Texas
– -$364K -1,510 Closed
Mackenzie Financial
416
Mackenzie Financial
Ontario, Canada
– -$338K -1,402 Closed
PIM
417
Plato Investment Management
Australia
– -$317K -1,317 Closed
FAM
418
Fred Alger Management
New York
– -$261K -1,083 Closed
CGH
419
Crossmark Global Holdings
Texas
– -$242K -1,003 Closed
LIM
420
Leavell Investment Management
Alabama
– -$241K -1,000 Closed
BC
421
Bridgefront Capital
Texas
– -$234K -971 Closed
LCM
422
Laurion Capital Management
New York
– -$214K -886 Closed
BC
423
Brio Consultants
California
– -$208K -863 Closed
GWM
424
Gitterman Wealth Management
New Jersey
– -$160K -664 Closed
Group One Trading
425
Group One Trading
Illinois
– -$155K -570 Closed
14 15 16
17
18

BIO Hedge Fund Activity: Q3 2025 in Review

396 of the 7,620 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.