Bio-Rad Laboratories Class A
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.
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
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Capital Research Global Investors
Los Angeles,
California
|
+$114M |
| 2 |
UBS AM
Chicago,
Illinois
|
+$104M |
| 3 |
Fuller & Thaler Asset Management
San Mateo,
California
|
+$64.7M |
| 4 |
MP
Mangrove Partners
Greenwich,
Connecticut
|
+$34.5M |
| 5 |
BTW
Boston Trust Walden
Boston,
Massachusetts
|
+$26M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
-$61.9M |
| 2 |
Select Equity Group
New York
|
-$61.8M |
| 3 |
TSW
Thompson Siegel & Walmsley
Richmond,
Virginia
|
-$24.1M |
| 4 |
ECM
ExodusPoint Capital Management
New York
|
-$23.2M |
| 5 |
Goldman Sachs
New York
|
-$23M |
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.