MGNI MAGNITE, INC.
Executive Summary
An institutional cluster in MGNI shows mixed signals: three mega-passive funds (Morgan Stanley, T. Rowe Price, BofA) added $23.8M in aggregate holdings, while two other mega-passive funds (Capital Group, UBS) sold $192.1M. The net selling pressure is nearly 8x the buying, driven primarily by Capital Group's 46% reduction of a $311.6M position. This is a notable divergence among passive managers, not an active-fund conviction signal.
Key Financial Metrics
Institutional Positions
Net institutional flow: -$168.3M
▲ Buyers (3)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Morgan Stanley | ADD | +74.8% | $44.6M | $16.3M |
| T. Rowe Price | DOUBLED | +2066.2% | $55.0K | $53.0K |
| BofA | ADD | +92.6% | $17.3M | $7.4M |
▼ Sellers (2)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Capital Group | TRIM | -46% | $311.6M | -$159.5M |
| UBS | NEAR_EXIT | -75.5% | $41.8M | -$32.5M |
Actionable Insight
The cluster is dominated by passive rebalancing, not active conviction. Capital Group's large trim is the most material signal, but without active-fund participation, the read-through is weak. Monitor upcoming 13F filings for active hedge fund positioning and next earnings for fundamental catalyst. The 90% analyst bullish consensus provides a contrarian backdrop.
Key Facts
- 3 buyers added $23.8M net; 2 sellers reduced $192.1M net
- Capital Group alone sold $159.5M (46% of its prior stake)
- All 5 institutions are mega-passive managers — no active hedge funds or activists involved
- T. Rowe Price doubled its tiny position from $3K to $55K (negligible dollar impact)
- Net institutional flow is heavily negative: -$168.3M across the cluster
Financial Impact
Net institutional selling of approximately $168.3M across 5 mega-passive funds in Q3 2025
Risk Factors
- Passive fund flows may reflect index rebalancing, not fundamental thesis
- 13F data is 45+ days stale; positions may have already reversed
- Capital Group's large trim could signal fundamental concerns not yet public
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-MGNI-2025-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
|
Jun 11, 2026
1d ago
|
Institutional Cluster
| $15.69 awaiting T+1 | awaiting T+1 | — | — |
|
Jun 11, 2026
2d ago
|
Insider Cluster
| $15.69 awaiting T+1 | awaiting T+1 | — | — |
|
Jun 10, 2026
2d ago
|
144
| $15.69 awaiting T+1 | awaiting T+1 | — | — |
|
Jun 4, 2026
9d ago
|
Press Release
| $14.86 $14.68 | ▼ −1.21% | ▲ +1.39% | — |
|
Jun 3, 2026
10d ago
|
Press Release
| $14.45 $14.86 | ▲ +2.84% | ▲ +2.44% | — |
|
Apr 21, 2026
7w ago
|
Press Release
| $13.08 $13.39 | ▲ +2.37% | ▲ +1.35% | — |
|
Apr 20, 2026
7w ago
|
8-K
| $13.08 $13.39 | ▲ +2.37% | ▲ +1.35% | — |
|
Apr 10, 2026
9w ago
|
8-K
| $12.09 $12.46 | ▲ +3.06% | ▲ +1.85% | — |
|
Apr 6, 2026
9w ago
|
Press Release
| $12.16 $12.05 | ▼ −0.90% | ▼ −0.97% | — |
|
Mar 11, 2026
13w ago
|
Press Release
| $12.29 $11.88 | ▼ −3.34% | ▼ −2.74% | — |
US Market Status
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