The cluster is balanced with no clear directional signal — active buyers (Capital World, D.E. Shaw) are offset by active sellers (Capital International, Susquehanna). Monitor next 13F for whether these new positions were held or reversed, and watch for any insider buying/selling on Form 4 to corroborate conviction.
Executive Summary
A mixed institutional cluster in BRK-B during Q2 2026 shows 50 buyers accumulating $2.91B in new positions versus 37 sellers reducing $2.58B, resulting in a modest net inflow of ~$330M. The buying is concentrated among active asset managers (Capital World Investors new $1.36B stake, D.E. Shaw doubling to $961M, Jane Street and Mirae Asset each adding ~$200M+), while the selling is dominated by Fidelity's passive trim of $1.96B and several active trims (Capital International, Susquehanna, Wealth Enhancement). The net signal is neutral given the 45-day reporting lag and the offsetting flows.
Key Financial Metrics
Institutional Positions
Net institutional flow: $330.0M
▲ Buyers (50)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Capital World Investors | NEW | +0% | $1.4B | $1.4B |
| D.E. Shaw | DOUBLED | +310.2% | $961.0M | $736.7M |
| Jane Street Group | DOUBLED | +538.5% | $210.5M | $178.9M |
| Mirae Asset Global Investments Co. | DOUBLED | +143095.2% | $208.5M | $208.4M |
| Citigroup | ADD | +40.6% | $1.1B | $360.1M |
▼ Sellers (37)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Fidelity | TRIM | -30.5% | $7.2B | -$2.0B |
| Capital International Investors | TRIM | -35.2% | $404.7M | -$131.0M |
| Susquehanna International Group | TRIM | -48.8% | $314.5M | -$146.2M |
| Wealth Enhancement Advisory Services | TRIM | -27.1% | $465.6M | -$118.5M |
| Eurizon Capital Sgr S.p.a. | TRIM | -52% | $187.4M | -$93.6M |
Key Facts
- 50 institutional buyers added $2.91B in BRK-B positions during Q2 2026
- 37 institutional sellers reduced $2.58B in BRK-B positions during same period
- Net institutional inflow of approximately $330M
- Capital World Investors initiated a new $1.36B position, the largest single buy
- D.E. Shaw more than tripled its stake to $961M (+310% shares)
- Fidelity trimmed $1.96B, the largest single sell, likely passive rebalancing
- Active managers dominate both sides of the trade, suggesting divergent views
Financial Impact
Net institutional inflow of ~$330M, with $2.91B in buying vs $2.58B in selling across 87 funds
Risk Factors
- 13F data is 45+ days stale; positions may have been unwound since quarter-end
- Fidelity's $1.96B trim may reflect index rebalancing rather than fundamental view
- No insider buying reported to corroborate the institutional accumulation
Investment Themes
Documents Analyzed
This report is based on 1 institutional 13F filing from SEC EDGAR.
| Document | Accession Number |
|---|---|
| INST-CLUSTER Data (Synthetic) | inst-cluster-BRK-B-2026-Q2 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 16, 2026 10d ago | Institutional Cluster | $532.02 $548.56 | ▲ +3.11% | ▲ +3.25% | — |
Oct 12, 2026 15d ago | Institutional Cluster | $517.60 $532.23 | ▲ +2.83% | ▲ +4.32% | — |
Oct 7, 2026 20d ago | SC 13G/A | $511.05 $525.68 | ▲ +2.86% | ▲ +3.14% | — |
Sep 21, 2026 5w ago | 3 | $502.88 $502.31 | ▼ −0.11% | ▲ +1.07% | — |
Aug 11, 2026 10w ago | 8-K | $516.15 $503.09 | ▼ −2.53% | ▼ −2.13% | — |
Mar 13, 2026 32w ago | DEFA14A | $492.26 $480.00 | ▼ −2.49% | ▼ −0.45% | — |
Mar 13, 2026 32w ago | DEFA14A | $492.26 $480.00 | ▼ −2.49% | ▼ −0.45% | — |
Mar 5, 2026 33w ago | 8-K | $499.78 $491.74 | ▼ −1.61% | ▲ +0.63% | — |
US Market Status
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