Among active 13F managers last quarter, 1 opened and 12 added, while 16 reduced; the largest holder to move was Mirae Asset Global Investments Co., Ltd. (new position). Over the last 180 days, 1 insider bought and none sold, a net +$501K in open-market trades.
The legs disagree, or only one of them leans.
1,276 tracked 13F filers disclose a position in BRK/A as of the latest SEC 13F filings, a combined $324.1B in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Mirae Asset Global Investments Co., Ltd. | 368K | $264.6B | ▲New +368K sh | Q1 2026 | |
| 2 | Vinva Investment Management Ltd | 78K | Withheld | ▲+13% Added · +9K sh | Q1 2026 | |
| 3 | FMR LLC | 17K | $12.2B | ▼−31% Reduced · −8K sh | Q1 2026 | |
| 4 | First Manhattan Co. LLC. | 14K | $10.0B | ▼−0.8% Reduced · −108 sh | Q1 2026 | |
| 5 | Norges Bank | 10K | $7.8B | ▲+2.6% Added · +260 sh | Q4 2025 | |
| 6 | Vista Capital Partners, Inc. | 7K | Withheld | ▲+26% Added · +1K sh | Q2 2026 | |
| 7 | McMill Wealth Management | 7K | Withheld | ▲2k× Added · +7K sh | Q2 2026 | |
| 8 | Shepherd Wealth Management Ltd Liability Co | 3K | Withheld | ▲New +3K sh | Q2 2026 | |
| 9 | Vanguard Portfolio Management LLC | 2K | $1.5B | →New filer Inherited book · not a new buyer | Q1 2026 | |
| 10 | HighTower Advisors, LLC | 2K | $1.4B | ▼−3.5% Reduced · −72 sh | Q1 2026 | |
| 11 | Gardner Russo & Quinn LLC | 1K | $1.0B | ▼−1.9% Reduced · −28 sh | Q1 2026 | |
| 12 | Everett Harris & Co | 1K | $1.0B | ▼−0.1% Reduced · −1 sh | Q1 2026 | |
| 13 | Vanguard Capital Management LLC | 1K | $990.3M | →New filer Inherited book · not a new buyer | Q1 2026 | |
| 14 | Hikari Tsushin, Inc. | 1K | $844.0M | —Held | Q2 2026 | |
| 15 | Markel Group Inc. | 1K | $834.2M | —Held | Q2 2026 | |
| 16 | Paralel Advisors LLC | 1K | $769.8M | —Held | Q2 2026 | |
| 17 | PNC Financial Services Group, Inc. | 984 | $706.6M | ▼−2.5% Reduced · −25 sh | Q1 2026 | |
| 18 | US Bancorp | 861 | $618.3M | ▲+0.2% Added · +2 sh | Q1 2026 | |
| 19 | Morgan Stanley | 755 | $542.2M | ▲+0.8% Added · +6 sh | Q1 2026 | |
| 20 | Bank Of America Corp | 744 | $534.3M | ▲+1.1% Added · +8 sh | Q1 2026 | |
| 21 | Wellcome Trust Ltd (THE) as trustee of the WELLCOME TRUST | 700 | $524.2M | —Held | Q2 2026 | |
| 22 | S&G Foundation | 665 | $498.0M | —Held | Q2 2026 | |
| 23 | Fiduciary Trust Co | 643 | $461.8M | ▼−0.1% Reduced · −1 sh | Q1 2026 | |
| 24 | First Eagle Investment Management, LLC | 565 | $423.1M | —Held | Q2 2026 | |
| 25 | Baldwin Investment Management, LLC | 555 | $415.6M | —Held | Q2 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership. 7 value rows are withheld because the reported units disagree with same-security peers; share counts are unchanged.
Last quarter, 1 fund opened a new position in BRK/A and 12 added to an existing one, while 16 reduced. Based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Their position there |
|---|---|---|
| Microsoft CorpMSFT | 810 funds | $243.5B |
| Apple IncAAPL | 805 funds | $266.3B |
| Alphabet Inc-CL AGOOGL | 789 funds | $153.2B |
| Berkshire Hathaway Inc-CL BBRK/B | 786 funds | $42.4B |
| Amazon.com IncAMZN | 781 funds | $172.7B |
| Alphabet Inc-CL CGOOG | 773 funds | $122.1B |
| Nvidia CorpNVDA | 760 funds | $320.9B |
| JPMorgan Chase & CoJPM | 743 funds | $65.0B |
| Johnson & JohnsonJNJ | 709 funds | $45.6B |
| Meta Platforms Inc-Class AMETA | 706 funds | $100.5B |
| Visa Inc-Class A SharesV | 697 funds | $62.8B |
| SS SPDR S&P 500 ETF Trust-USSPY | 691 funds | $31.5B |
Ranked by how many of BRK/A's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in BRK/A.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 12, 2026 | O'Sullivan Michael J. | See Remarks | Buy (P) 3 lots, same day | 488 | $250K |
| May 6, 2026 | O'Sullivan Michael J. | See Remarks | Buy (P) 2 lots, same day | 536 | $251K |
| Sep 26, 2025 | Jain Ajit | Vice Chairman, Director | Sell (S) | 15K | — |
| Aug 8, 2025 | Jain Ajit | Vice Chairman, Director | Sell (S) | 2K | $929K |
| Mar 3, 2025 | Witmer Meryl B | Director | Sell (S) | 2 | $1.6M |
| Aug 8, 2023 | Jain Ajit | Vice Chairman, Director | Sell (S) | 28K | $10.2M |
| Mar 2, 2023 | Jain Ajit | Vice Chairman, Director | Sell (S) | 7K | $2.0M |
| Nov 29, 2022 | Jain Ajit | Vice Chairman, Director | Sell (S) | 4K | $1.3M |
| Sep 29, 2022 | Abel Gregory | Vice Chair, Director | Buy (P) 39 lots, same day | 59 | $24.0M |
One row per insider, day and transaction code; shares and value are summed across the lots. Every lot is on the full insider page and in the filing.
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 25 | 37 | – |
Insiders Form 4 open-market | 1 | 0 | +$501K |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
Connected entities for BRK/A
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/BRK/A/capital-change-brief"
Use Arkolith's capital_change_brief for BRK/A. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + the live filing stream, joined for BRK/A. Filings are public domain, sourced to SEC EDGAR.