The 3:1 buyer-to-seller ratio and $97.4M net inflow from diverse active managers (Dimensional, Bridgewater, a new active-value fund) signals broad institutional conviction. Monitor upcoming earnings for subscriber trends and free cash flow conversion, which likely drove this accumulation.
Executive Summary
In Q2 2026, 57 institutional buyers added $205.2M in SIRI positions while 18 sellers reduced $107.8M, resulting in net accumulation of $97.4M. The buying was led by Dimensional Fund Advisors ($165.1M increase) and Northern Trust ($21.5M increase), while major sellers included Ameriprise Financial ($34.2M reduction) and HSBC ($25.7M reduction). The strong net buying from large asset managers and a new active-value fund suggests growing institutional conviction in Sirius XM's cash flow generation and capital return story.
Key Financial Metrics
Institutional Positions
Net institutional flow: $97.4M
▲ Buyers (57)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Dimensional Fund Advisors | ADD | +66.8% | $310.5M | $165.1M |
| Northern Trust | ADD | +44.6% | $46.8M | $21.5M |
| Fund 1 | NEW | +100% | $10.3M | $10.3M |
| Wells Fargo | DOUBLED | +124.6% | $7.9M | $5.1M |
| Bridgewater | ADD | +62.3% | $4.4M | $2.3M |
▼ Sellers (18)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Millennium | EXIT | -100% | $11.7M | -$11.7M |
| Jane Street Group | NEAR_EXIT | -98.3% | $14.1M | -$13.8M |
| Ameriprise Financial | TRIM | -69.8% | $55.7M | -$34.2M |
| Hsbc Holdings | TRIM | -69.9% | $41.6M | -$25.7M |
| Barclays | TRIM | -57.5% | $16.6M | -$7.6M |
Key Facts
- 57 institutional buyers added $205.2M in net new value, while 18 sellers reduced $107.8M
- Dimensional Fund Advisors increased its stake by 66.8% to $310.5M, the largest buyer
- Millennium Management fully exited its $11.7M position
- Jane Street Group reduced by 98.3%, leaving only $311K
- Ameriprise Financial trimmed 69.8% of its position, selling $34.2M
- Bridgewater Associates added 62.3% to its position
Financial Impact
Net institutional accumulation of $97.4M in Q2 2026, with $205.2M in buying vs $107.8M in selling
Risk Factors
- 13F data has 45-day reporting lag; positions may have been unwound since quarter-end
- Satellite radio faces secular competition from streaming and connected car alternatives
- Heavy selling by Millennium, Jane Street, and HSBC suggests some sophisticated investors disagree with the bullish thesis
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-SIRI-2026-Q2 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 21, 2026 5d ago | Press Release | $27.54 | awaiting T+20 | — | — |
Oct 5, 2026 21d ago | Press Release | $26.31 | awaiting T+20 | — | — |
Sep 22, 2026 4w ago | Institutional Cluster | $26.53 $27.16 | ▲ +2.37% | ▲ +2.93% | — |
Jul 30, 2026 12w ago | 8-K | $30.97 $28.50 | ▼ −7.98% | ▼ −11.94% | — |
Jul 30, 2026 12w ago | 8-K | $30.97 $28.50 | ▼ −7.98% | ▼ −11.94% | — |
Jul 30, 2026 12w ago | Press Release | $30.97 $28.50 | ▲ +7.98% | ▲ +11.94% | — |
Jul 6, 2026 16w ago | Press Release | $30.71 $30.37 | ▼ −1.11% | ▼ −2.44% | — |
Jun 12, 2026 19w ago | Institutional Cluster | $27.52 $30.42 | ▲ +10.54% | ▲ +8.76% | — |
Apr 30, 2026 25w ago | 8-K | $26.67 $29.52 | ▲ +10.68% | ▲ +5.45% | — |
Apr 10, 2026 28w ago | DEFA14A | $23.46 $26.75 | ▲ +14.01% | ▲ +5.48% | — |
US Market Status
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