Form 13-F position report

BIO-RAD LABS CL A

Reported by RK Asset Management LLC

BIO CUSIP 090572207 Manager CIK 0001595686

Reported 14,573 shares, up 71 (0.5%) from the prior quarter.

Reported value 8.5%; share count 0.5% vs. the prior quarter.

Added
% of reported 13F value 4.17% This manager · Q4 2025
Shares 14,573 Quarter-end amount reported
Reported value $4,415,000 Fair value at quarter end
Consecutive quarters held 6 Through Q4 2025

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Reported position value by quarter
Date Holding Value
2024-09-30 5198000
2024-12-31 4805000
2025-03-31 3505000
2025-06-30 3501000
2025-09-30 4070000
2025-12-31 4415000

Quarterly position history

How this manager's reported quarter-end position changed over time.

6 quarters
Quarterly reported position history for BIO-RAD LABS CL A held by RK Asset Management LLC.
Quarter Activity Shares Change % of reported 13F Reported value Filed Source filing
Q4 2025 Added 14,573 +71 (0.5%) 4.17% $4,415,000 2026-01-05
Q3 2025 Unchanged 14,502 0 (0.0%) 3.7% $4,070,000 2025-10-14
Q2 2025 Added 14,502 +113 (0.8%) 3.37% $3,501,000 2025-07-18
Q1 2025 Reduced 14,389 -237 (-1.6%) 3.24% $3,505,000 2025-04-02
Q4 2024 Reduced 14,626 -911 (-5.9%) 3.93% $4,805,000 2025-01-03
Q3 2024 New 15,537 +15,537 (0.0%) 4.0% $5,198,000 2024-10-07

Who else reported the position

454 managers reported BIO-RAD LABS CL A for Q4 2025.

Managers reporting BIO-RAD LABS CL A in Q4 2025.
Manager Activity Shares Change % of reported 13F Reported value Tenure
First Eagle Investment Management LLC Added 2,570,473 +50,154 1.37% $778,827,760 11 qtrs
VANGUARD GROUP INC Reduced 1,774,263 -19,274 < 0.01% $537,583,947 51 qtrs
BlackRock Inc Reduced 1,680,948 -14,901 < 0.01% $509,310,344 6 qtrs
DIMENSIONAL FUND ADVISORS LP Added 1,077,072 +14,134 0.07% $326,343,765 51 qtrs
ARIEL INVESTMENTS LLC Reduced 764,672 -44,808 2.5% $231,687,970 51 qtrs
EARNEST PARTNERS LLC Reduced 603,594 -5,690 0.78% $182,882,946 49 qtrs
STATE STREET CORPORATION Reduced 559,604 -11,995 < 0.01% $169,554,416 41 qtrs
Veritas Asset Management LLP Reduced 543,335 -300,704 1.68% $164,625,072 15 qtrs
Capital Research Global Investors Added 494,472 +76,117 0.03% $149,820,071 2 qtrs
Bank of America Corporation Reduced 445,449 -14,438 < 0.01% $134,966,592 51 qtrs
Premium adds each manager's conviction percentile across reporting peers.
Filing details and methodology As reported
Report period
December 31, 2025
Filed
January 05, 2026
Filing type
13F-HR
Position type
COM

Voting authority reported

Sole
14,573
Shared
0
None
0

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.