Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in BIO held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | First Eagle Investment Management, LLC | 2.6M | $725.5M | +1.3% | 9.639% | 0.96% |
| 2 | BlackRock, Inc. | 1.7M | $468.3M | -0.1% | 6.222% | 0.01% |
| 3 | DIMENSIONAL FUND ADVISORS LP | 1.1M | $303.6M | +1.1% | 4.034% | 0.06% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 831K | $231.7M | β | 3.078% | 0.01% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 829K | $231.1M | β | 3.071% | 0.01% |
| 6 | ARIEL INVESTMENTS, LLC | 786K | $219.1M | +2.8% | 2.911% | 2.45% |
| 7 | EARNEST PARTNERS LLC | 589K | $164.1M | -2.5% | 2.180% | 0.68% |
| 8 | STATE STREET CORP | 560K | $156.0M | -0.0% | 2.072% | 0.01% |
| 9 | Capital World Investors | 450K | $125.4M | β | 1.666% | 0.02% |
| 10 | BANK OF AMERICA CORP /DE/ | 445K | $124.0M | -0.1% | 1.648% | 0.01% |
| 11 | UBS ASSET MANAGEMENT AMERICAS INC | 426K | $118.8M | +7.8% | 1.578% | 0.02% |
| 12 | First Pacific Advisors, LP | 407K | $113.6M | +1.5% | 1.509% | 1.59% |
| 13 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 396K | $110.4M | -0.8% | 1.467% | 0.04% |
| 14 | Capital Research Global Investors | 386K | $107.5M | -22.0% | 1.428% | 0.02% |
| 15 | GEODE CAPITAL MANAGEMENT, LLC | 365K | $101.7M | +7.8% | 1.351% | 0.01% |
| 16 | UBS Group AG | 354K | $98.8M | +63.9% | 1.312% | 0.01% |
| 17 | SEI INVESTMENTS CO | 288K | $80.3M | -1.4% | 1.066% | 0.07% |
| 18 | BARCLAYS PLC | 279K | $77.7M | +1038.4% | 1.033% | 0.03% |
| 19 | MORGAN STANLEY | 274K | $76.4M | +47.0% | 1.014% | 0.00% |
| 20 | PARNASSUS INVESTMENTS /CA | 254K | $70.9M | +0.9% | 0.942% | 0.21% |
| 21 | DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) | 226K | $63.0M | 0.0% | 0.837% | 0.74% |
| 22 | NORTHERN TRUST CORP | 218K | $60.9M | +1.1% | 0.809% | 0.01% |
| 23 | NOMURA HOLDINGS INC | 217K | $60.6M | β | 0.805% | 0.20% |
| 24 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 197K | $54.8M | +9.0% | 0.728% | 0.01% |
| 25 | Mawer Investment Management Ltd. | 189K | $52.6M | -19.3% | 0.699% | 0.34% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in BIO β a direct measure of their conviction.
Filings activity in BIO during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new BIO position in Q1 2026
Institutions that fully closed their BIO position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 386 | 0.5% | 68.55% | 3.91 pp | $5.29B | 5.4% |
| Q4 2025 | 388 | +1.0% | 72.46% | +5.33 pp | $5.59B | +7.9% |
| Q3 2025 | 384 | +0.8% | 67.13% | +1.77 pp | $5.18B | +2.7% |
| Q2 2025 | 381 | 9.5% | 65.36% | +9.20 pp | $5.05B | +16% |
| Q1 2025 | 421 | 4.5% | 56.16% | 16.09 pp | $4.34B | 22% |
| Q4 2024 | 441 | +4.0% | 72.25% | 1.83 pp | $5.58B | 2.5% |
| Q3 2024 | 424 | 1.6% | 74.08% | +7.49 pp | $5.72B | +11% |
| Q2 2024 | 431 | β | 66.59% | β | $5.14B | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying BIO stock.
Based on Q1 2026 13F filings, institutional ownership of Bio-Rad Laboratories, Inc. stands at 68.5%, held across 386 reporting institutions.
First Eagle Investment Management, LLC is the largest reported institutional holder of BIO, with approximately 2,602,772 shares worth $0.73B as of Q1 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of BIO.
Our composite Smart Money Score for BIO is 23 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
69 institutions opened new positions in BIO during Q1 2026, while 71 fully exited. 85 added to existing positions and 231 trimmed.
BIO institutional ownership fell by 3.91 percentage points quarter-over-quarter, with a net change of -2 holders.
The top 10 institutions account for 51.9% of all reported 13F value in BIO, and the top 25 account for 75.5%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Bio-Rad Laboratories, Inc. (BIO) Institutional Ownership