# BIO RAD LABS INC (BIO) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 090572207
Page URL: https://superinvestorclub.com/stock/BIO
Last updated: 2026-07-08T11:37:25.524Z

## Summary

As of the most recent 13F filing period, BIO RAD LABS INC (BIO) is held by 4 tracked superinvestors with an aggregate position value of $378.5M representing 07859614073581628041684 shares.

## Top institutional holders (4)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [John Rogers](https://superinvestorclub.com/manager/76) | Ariel Investments | 785961 | $219.1M | 2.45% | 2026-03-31 |
| 2 | [Steven Romick](https://superinvestorclub.com/manager/289) | First Pacific Advisors | 407358 | $113.6M | 1.59% | 2026-03-31 |
| 3 | [Longleaf Partners](https://superinvestorclub.com/manager/15) | Southeastern Asset Management | 162804 | $45.4M | 2.23% | 2026-03-31 |
| 4 | [Ray Dalio](https://superinvestorclub.com/manager/6) | Bridgewater Associates | 1684 | $469,415 | 0.00% | 2026-03-31 |

## Ownership history (quarter-over-quarter)

- 2024-03-31: 1 holders, $119.0M aggregate, 0343959 shares
- 2024-06-30: 2 holders, $117.2M aggregate, 0325013104187 shares
- 2024-09-30: 3 holders, $286.0M aggregate, 0378695318336157877 shares
- 2024-12-31: 3 holders, $337.3M aggregate, 0560524308469157850 shares
- 2025-03-31: 3 holders, $346.1M aggregate, 0724660372555323805 shares
- 2025-06-30: 3 holders, $367.0M aggregate, 0818624386949315285 shares
- 2025-09-30: 4 holders, $407.1M aggregate, 080948039441423725410632 shares
- 2025-12-31: 3 holders, $422.3M aggregate, 0764672401457227630 shares
- 2026-03-31: 4 holders, $378.5M aggregate, 07859614073581628041684 shares

## Recent congressional trades (0)


## Recent insider transactions (0)


## Citation

When citing, use: "BIO RAD LABS INC (BIO) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/BIO), aggregating SEC 13F, Form 4, and congressional disclosures."