The cluster is small ($8.2M total) relative to MPLX's $59.7B market cap, representing less than 0.02% of shares outstanding. Without insider buying or larger institutional moves, this is a weak signal. Monitor next 13F filing for larger funds or activist involvement.
Executive Summary
Three asset managers (Truist Financial, Wealth Enhancement Advisory Services, Concurrent Investment Advisors) added to their MPLX positions in Q3 2026, increasing aggregate holdings by $2.3M to $8.2M. No institutional selling was reported, but the cluster is small in dollar terms and lacks insider buying corroboration.
Key Financial Metrics
Institutional Positions
Net institutional flow: $2.3M
▲ Buyers (3)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Truist Financial | ADD | +36.5% | $1.0M | $277.0K |
| Wealth Enhancement Advisory Services | ADD | +34.6% | $5.8M | $1.5M |
| Concurrent Investment Advisors | ADD | +66.5% | $1.3M | $527.0K |
Key Facts
- 3 institutional buyers added $2.3M in net new value, bringing total disclosed holdings to $8.2M
- No institutional sellers in the cluster
- All three buyers are asset managers making modest additions (34.6%-66.5% share increases)
- Insider buying confluence score is low at 19/100, with no open-market insider purchases
- 13F data is as of September 30, 2026, and positions may have changed since
Financial Impact
3 institutions accumulated $2.3M in net new positions, bringing total disclosed holdings to $8.2M
Risk Factors
- 13F data is 45+ days stale; positions may have been unwound since quarter-end
- No insider buying to corroborate the institutional thesis
- Cluster size is negligible relative to market cap
- All buyers are asset managers, not activist or event-driven funds
Market Snapshot
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-MPLX-2026-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 30, 2026 1d ago | Institutional Cluster | $60.31 | awaiting T+20 | awaiting T+20 | No price |
Oct 29, 2026 2d ago | 8-K | $59.50 | awaiting T+20 | awaiting T+20 | No price |
Oct 27, 2026 4d ago | Press Release | $58.11 | awaiting T+20 | awaiting T+20 | No price |
Sep 17, 2026 6w ago | Press Release | $59.44 | awaiting T+20 | awaiting T+20 | No price |
Aug 10, 2026 11w ago | Press Release | $59.30 $60.23 | ▲ +1.57% | ▲ +2.63% | No price |
Aug 10, 2026 11w ago | 424B5 | $58.70 $59.61 | ▲ +1.55% | ▲ +2.46% | No price |
Aug 4, 2026 12w ago | 8-K | $60.51 $59.09 | ▼ −2.35% | ▼ −1.11% | No price |
Mar 18, 2026 32w ago | 8-K | $57.16 $55.88 | ▼ −2.25% | ▼ −9.87% | No price |
US Market Status
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