Monitor for entry of active managers or hedge funds as a stronger conviction signal. The all-passive buying cluster is likely index/completion fund rebalancing, not alpha-seeking conviction. Given KYMR's poor post-report drift track record, treat the cluster as noise unless follow-on 13F filings reveal activist or value-fund accumulators.
Executive Summary
A cluster of four mega-passive institutions (State Street, Morgan Stanley, Wells Fargo, BofA) added a combined $62.8M to their KYMR positions in Q3 2025, while T. Rowe Price trimmed a tiny position. All buying is passive/index-driven, with no active or activist fund participation. Despite the net $62.8M inflow, the purely passive nature of the buying and KYMR's heavy history of negative post-report drift (14% win rate at T+20) suggest the signal lacks genuine conviction.
Key Financial Metrics
Institutional Positions
Net institutional flow: $62.8M
▲ Buyers (4)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| State Street | ADD | +29.9% | $114.3M | $46.5M |
| Morgan Stanley | ADD | +59% | $21.4M | $11.0M |
| BofA | ADD | +38% | $10.5M | $4.7M |
| Wells Fargo | ADD | +25.4% | $1.8M | $699.0K |
▼ Sellers (1)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| T. Rowe Price | TRIM | -25.7% | $299.0K | -$10.8K |
Key Facts
- 4 mega-passive institutions accumulated $62.8M in KYMR during Q3 2025.
- State Street added the most: +29.9% shares, value increasing $46.5M to $114.3M.
- No active managers, hedge funds, or family offices participated in the cluster.
- T. Rowe Price trimmed a minimal position (value drop of ~$10.8K, $289K → $289K).
- KYMR has a 93% bullish analyst consensus but the stock has historically performed poorly following past reports (14% win rate T+20).
Financial Impact
$62.8M net institutional buying concentrated among passive index funds in Q3 2025.
Risk Factors
- Passive buying may reverse on next index rebalance; no active manager signal to provide support.
- Historical reports on KYMR have a 14% T+20 win rate with average alpha of -9.46%, suggesting the stock tends to sell off after filing events.
- No fundamental catalyst provided — the cluster could represent end-of-quarter portfolio alignment rather than a directional thesis.
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-KYMR-2025-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 5, 2026 8w ago | 8-K | $105.48 $118.63 | ▲ +12.47% | ▲ +13.07% | — |
Jul 8, 2026 12w ago | Insider Cluster | $114.16 $105.48 | ▲ +7.60% | ▲ +10.88% | — |
Jul 2, 2026 13w ago | Insider Cluster | $113.51 $107.01 | ▲ +5.73% | ▲ +5.31% | — |
Jul 2, 2026 13w ago | Insider Cluster | $113.51 $107.01 | ▲ +5.73% | ▲ +5.31% | — |
Jun 30, 2026 13w ago | 144 | $114.20 $105.25 | ▲ +7.84% | ▲ +5.65% | — |
Jun 29, 2026 13w ago | 144 | $114.67 $110.05 | ▼ −4.03% | ▼ −3.00% | — |
Jun 26, 2026 13w ago | Insider Cluster | $109.32 $110.57 | ▼ −1.14% | ▼ −1.42% | — |
Jun 26, 2026 13w ago | 144 | $109.32 $110.57 | ▼ −1.14% | ▼ −1.42% | — |
Jun 26, 2026 13w ago | 144 | $109.32 $110.57 | ▼ −1.14% | ▼ −1.42% | — |
Jun 24, 2026 14w ago | 144 | $116.46 $110.38 | ▼ −5.22% | ▼ −5.75% | — |
US Market Status
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