Thompson Siegel & Walmsley LLC / BIO
Thompson Siegel & Walmsley LLC’s Bio Rad Labs Inc Position
Does Thompson Siegel & Walmsley LLC own Bio Rad Labs Inc (BIO)? Yes — 176.5K shares worth $49M (+0.86% of its 13F portfolio) as of Q1 2026, down from 192.0K shares the prior filed quarter.
Position Value
$49M
Q1 2026
Shares
176.5K
% of Portfolio
+0.86%
Quarters Held
15
currently held
Position History BIO
Reported value by quarter
| Quarter | Shares | Value | % of Portfolio |
|---|---|---|---|
| Q1 2026 | 176.5K | $49M | +0.86% |
| Q4 2025 | 192.0K | $58M | +0.98% |
| Q3 2025 | 217.6K | $61M | +0.99% |
| Q2 2025 | 306.1K | $74M | +1.23% |
| Q1 2025 | 279.5K | $68M | +1.14% |
| Q4 2024 | 258.2K | $85M | +1.32% |
| Q3 2024 | 306.8K | $103M | +1.53% |
| Q2 2024 | 390.0K | $107M | +1.71% |
| Q1 2024 | 350.0K | $121M | +1.86% |
| Q4 2023 | 348.5K | $113M | +1.82% |
| Q3 2023 | 312.6K | $112M | +1.86% |
| Q2 2023 | 294.2K | $112M | +1.78% |
| Q1 2023 | 203.2K | $97M | +1.57% |
| Q4 2022 | 201.2K | $85M | +1.37% |
| Q3 2022 | 19.0K | $8M | +0.14% |
Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Thompson Siegel & Walmsley LLC’s full portfolio or all institutional holders of BIO.