Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionRock Point Advisors, LLC
Latest Disclosed Ownership1,220 shares
Latest Disclosed Value $ 584,624
Rock Point Advisors, LLC reports 5.90% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 14, 2026 - Rock Point Advisors, LLC filed a 13F-HR form disclosing ownership of 1,220 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $584,624 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 1,152 shares of Berkshire Hathaway Inc.. This represents a change in shares of 5.90% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,220 68 5.90 585 0.86 0.1582
2026-02-04 2025-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,152 0 0.00 579 0.00 0.1450
2025-11-12 2025-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,152 0 0.00 579 3.58 0.1535
2025-08-14 2025-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,152 0 0.00 560 -8.81 0.1579
2025-04-30 2025-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,152 0 0.00 614 17.43 0.1892
2025-02-13 2024-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,152 -359 -23.76 522 -24.89 0.1522
2024-11-13 2024-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,511 -475 -23.92 695 -13.88 0.1899
2024-08-08 2024-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,986 95 5.02 808 1.51 0.2423
2024-05-10 2024-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,891 234 14.12 795 34.75 0.2362
2024-02-08 2023-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,657 -50 -2.93 591 -1.17 0.1792
2023-11-09 2023-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,707 250 17.16 598 20.36 0.2069
2023-08-10 2023-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,457 190 15.00 497 0.1631
2023-05-10 2023-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,267 -22 -1.71 0 0.1329
2023-02-09 2022-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,289 0 0.00 0 -100.00 0.1378
2022-11-10 2022-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,289 100 8.41 344 5.85 0.1279
2022-08-10 2022-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,189 0 0.00 325 -22.62 0.1110
2022-05-10 2022-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,189 -101 -7.83 420 8.81 0.1252
2022-02-09 2021-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,290 0 0.00 386 9.66 0.1087
2021-11-05 2021-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,290 0 0.00 352 -1.95 0.1031
2021-08-05 2021-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,290 0 0.00 359 8.79 0.1034
2021-05-12 2021-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,290 84 6.97 330 17.86 0.1028
2021-02-08 2020-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,206 -5 -0.41 280 8.53 0.0962
2020-11-10 2020-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,211 1,211 258 0.1142
2020-08-12 2020-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 0 -1,116 -100.00 0 -100.00
2020-05-07 2020-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,116 -25 -2.19 204 -20.93 0.1210
2020-02-06 2019-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,141 -10 -0.87 258 7.95 0.1048
2019-11-08 2019-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,151 0 0.00 239 -2.45 0.1079
2019-08-12 2019-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,151 0 0.00 245 6.06 0.1115
2019-05-08 2019-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,151 -200 -14.80 231 -16.30 0.1087
2019-01-31 2018-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,351 0 0.00 276 -4.50 0.1416
2018-11-07 2018-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,351 -48 -3.43 289 10.73 0.1287
2018-08-09 2018-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 1,399 1,399 261 0.1263
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.