Form 13-F position report

BERKSHIRE HATHAWAY INC DEL

Reported by RK Asset Management LLC

BRK-B CUSIP 084670702 Manager CIK 0001595686

Reported 12,477 shares, down 923 (6.9%) from the prior quarter.

Reported value -6.9%; share count -6.9% vs. the prior quarter.

Reduced
% of reported 13F value 5.92% This manager · Q4 2025
Shares 12,477 Quarter-end amount reported
Reported value $6,272,000 Fair value at quarter end
Consecutive quarters held 13 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
2021-03-31 4360000
2021-06-30 4719000
2021-09-30 4559000
2021-12-31 4823000
2022-03-31 5293000
2022-12-31 4630000
2023-03-31 4534000
2023-06-30 4789000
2023-09-30 4837000
2023-12-31 5323000
2024-03-31 6120000
2024-06-30 5577000
2024-09-30 6644000
2024-12-31 6279000
2025-03-31 7127000
2025-06-30 6485000
2025-09-30 6737000
2025-12-31 6272000

Quarterly position history

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

18 quarters
Quarterly reported position history for BERKSHIRE HATHAWAY INC DEL held by RK Asset Management LLC.
Quarter Activity Shares Change % of reported 13F Reported value Filed Source filing
Q4 2025 Reduced 12,477 -923 (-6.9%) 5.92% $6,272,000 2026-01-05
Q3 2025 Added 13,400 +37 (0.3%) 6.13% $6,737,000 2025-10-14
Q2 2025 Reduced 13,363 -19 (-0.1%) 6.25% $6,485,000 2025-07-18
Q1 2025 Reduced 13,382 -471 (-3.4%) 6.58% $7,127,000 2025-04-02
Q4 2024 Reduced 13,853 -583 (-4.0%) 5.13% $6,279,000 2025-01-03
Q3 2024 Added 14,436 +727 (5.3%) 5.11% $6,644,000 2024-10-07
Q2 2024 Reduced 13,709 -845 (-5.8%) 4.82% $5,577,000 2024-08-02
Q1 2024 Reduced 14,554 -371 (-2.5%) 4.98% $6,120,000 2024-04-03
Q4 2023 Added 14,925 +1,116 (8.1%) 4.42% $5,323,000 2024-01-09
Q3 2023 Reduced 13,809 -235 (-1.7%) 4.53% $4,837,000 2023-10-10
Q2 2023 Reduced 14,044 -540 (-3.7%) 4.43% $4,789,000 2023-07-06
Q1 2023 Reduced 14,584 -404 (-2.7%) 4.49% $4,534,000 2023-04-03
Q4 2022 Reduced 14,988 -7 (0.0%) 4.44% $4,630,000 2023-01-03
Q1 2022 Reduced 14,995 -1,136 (-7.0%) 5.13% $5,293,000 2022-04-11
Q4 2021 Reduced 16,131 -574 (-3.4%) 4.26% $4,823,000 2022-01-05
Q3 2021 Reduced 16,705 -275 (-1.6%) 4.04% $4,559,000 2021-10-04
Q2 2021 Reduced 16,980 -88 (-0.5%) 4.08% $4,719,000 2021-07-07
Q1 2021 Reduced 17,068 -5,357 (-23.9%) 3.89% $4,360,000 2021-04-05
Five years are shown. A free account unlocks the complete reported history. Unlock full history

Who else reported the position

5051 managers reported BERKSHIRE HATHAWAY INC DEL for Q4 2025.

Managers reporting BERKSHIRE HATHAWAY INC DEL in Q4 2025.
Manager Activity Shares Change % of reported 13F Reported value Tenure
VANGUARD GROUP INC Added 157,103,196 +2,777,083 1.14% $78,967,921,468 51 qtrs
BlackRock Inc Added 121,193,733 +6,572,332 1.03% $60,918,030,137 6 qtrs
STATE STREET CORPORATION Added 73,925,068 +1,112,094 1.25% $37,158,435,430 41 qtrs
GEODE CAPITAL MANAGEMENT LLC Added 40,022,166 +61,224 1.24% $20,063,290,387 51 qtrs
MORGAN STANLEY Reduced 26,280,201 -292,324 0.79% $13,209,744,399 51 qtrs
BILL & MELINDA GATES FOUNDATION TRUST Reduced 19,406,764 -2,358,460 27.59% $9,754,809,925 51 qtrs
NORTHERN TRUST CORPORATION Reduced 15,528,328 -314,306 1.0% $7,805,314,069 51 qtrs
JPMorgan Chase & Co Added 12,883,585 +300,024 0.41% $6,475,935,032 51 qtrs
THE BANK OF NEW YORK MELLON CORPORATION Added 11,167,907 +49,958 0.99% $5,613,548,366 51 qtrs
CHARLES SCHWAB INVESTMENT MANAGEMENT INC Added 11,044,013 +76,080 0.86% $5,551,273,134 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
12,477
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.