SIRI SIRIUS XM HOLDINGS INC.
Executive Summary
22 institutional buyers (including Berkshire Hathaway's massive $2.49B new stake) accumulated $2.81B in SIRI during Q3 2024, with zero selling activity—an extremely rare and bullish signal from the institutional community. Berkshire's entry as a top holder, along with new positions from Citadel, Norges Bank, Weitz, and others, suggests a consensus bet on significant undervaluation or a pending catalyst.
Key Financial Metrics
Institutional Positions
Net institutional flow: $2.8B
▲ Buyers (22)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Berkshire Hathaway | NEW | +100% | $2.5B | $2.5B |
| Citadel Advisors | NEW | +100% | $59.3M | $59.3M |
| Norges Bank Investment Management | NEW | +100% | $52.8M | $52.8M |
| Dimensional Fund Advisors | NEW | +100% | $60.6M | $60.6M |
| Weitz Investment Management | NEW | +100% | $29.8M | $29.8M |
Actionable Insight
The concentrated buying from high-conviction active managers like Berkshire, Weitz, and Pentwater implies a deep-value or free-cash-flow thesis. Traders should watch for further 13F filings to see if positions were held into Q4. The absence of any seller is a powerful confirmation of institutional enthusiasm, but the 45-day lag means some buying may have already been reversed. Monitor upcoming earnings for subscriber and ARPU trends that could justify the valuation.
Key Facts
- Berkshire Hathaway established a new $2.49B position (105.16M shares), becoming the largest disclosed buyer.
- 22 institutions were net buyers with $2.81B in total new holdings; 0 sellers.
- Other notable new buyers: Citadel ($59.3M), Norges Bank ($52.8M), Dimensional Fund Advisors ($60.6M), Weitz ($29.8M), and Gabelli ($21.7M).
- No institutional selling was recorded, indicating unanimous positive sentiment among reporting funds.
Financial Impact
22 institutions accumulated $2.81 billion in new positions, led by Berkshire Hathaway's $2.49 billion stake. No selling activity.
Risk Factors
- 13F data is 45 days old; positions may have been partially or fully unwound since quarter-end.
- Berkshire's stake dominates the cluster—any reduction by them would significantly alter the narrative.
- SIRI's subscriber base is mature; competitive threats from streaming services could pressure long-term growth.
Market Snapshot
Documents Analyzed
This report is based on 1 institutional 13F filing from SEC EDGAR.
| Document | Accession Number |
|---|---|
| INST-CLUSTER Data (Synthetic) | inst-cluster-SIRI-2024-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
|
Jun 12, 2026
2d ago
|
Institutional Cluster
| $27.12 awaiting T+20 | awaiting T+20 | — | — |
|
Apr 30, 2026
6w ago
|
8-K
| $26.67 $29.52 | ▲ +10.68% | ▲ +5.45% | — |
|
Apr 10, 2026
9w ago
|
DEFA14A
| $23.46 $26.75 | ▲ +14.01% | ▲ +5.48% | — |
|
Mar 4, 2026
14w ago
|
8-K
| $22.41 $23.41 | ▲ +4.44% | ▲ +8.86% | — |
|
Feb 26, 2026
15w ago
|
8-K
| $21.31 $22.95 | ▲ +7.72% | ▲ +14.12% | — |
US Market Status
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