8 institutions reported holding $5.8M of BIO RAD LABS INC (BIO.B) in SEC 13F filings for 2026-03-31. Largest institutional holders: SIMPLEX TRADING, LLC ($4.7M), FLOW TRADERS U.S. LLC ($274,000), CSS LLC/IL ($271,850), Focus Partners Wealth ($211,470), MORGAN STANLEY ($198,114). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $4.7M | 16,900 | Added |
| 2 | FLOW TRADERS U.S. LLC | $274,000 | 985 | New |
| 3 | CSS LLC/IL | $271,850 | 977 | Trimmed |
| 4 | Focus Partners Wealth | $211,470 | 760 | Hold |
| 5 | MORGAN STANLEY | $198,114 | 712 | Added |
| 6 | WELLS FARGO & COMPANY/MN | $47,303 | 170 | Hold |
| 7 | WHITTIER TRUST CO | $43,933 | 160 | Hold |
| 8 | UBS Group AG | $3,617 | 13 | Added |
Source: SEC Form 13F filings · as of 2026-03-31