The overwhelming majority of institutional activity was bearish, led by large passive managers reducing exposure—often a sign of sector-wide risk-off behavior. Traders should watch for continued outflows or a potential contrarian signal if active managers begin accumulating.
Executive Summary
In Q4 2025, a bearish institutional cluster emerged in ARKK, with three major institutions selling $631.5M in holdings while only one—Two Sigma—increased its position by $13.1M. Morgan Stanley and BofA, both mega-passive firms, trimmed large portions of their stakes, and RenTech fully exited, signaling broad institutional de-risking despite a contrarian double by a quant fund.
Key Financial Metrics
Institutional Positions
Net institutional flow: -$617.3M
▲ Buyers (1)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Two Sigma | DOUBLED | +1282.5% | $14.2M | $13.1M |
▼ Sellers (3)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Morgan Stanley | TRIM | -38.1% | $750.5M | -$336.6M |
| BofA | TRIM | -44.7% | $576.6M | -$292.6M |
| RenTech | EXIT | -100% | $2.3M | -$2.3M |
Key Facts
- Two Sigma (quant) doubled its ARKK position, increasing value from $1.2M to $14.2M (+$13.1M).
- Morgan Stanley trimmed 38.1% of its stake, reducing holdings by $336.6M.
- BofA trimmed 44.7%, cutting $292.6M from its position.
- RenTech (quant) fully exited its $2.3M position.
- Net institutional outflow: $616.3M after accounting for Two Sigma's buy-in.
Financial Impact
3 institutions reduced ARKK holdings by $631.5M, while 1 added $13.1M, resulting in a net outflow of $618.4M
Risk Factors
- ARKK remains under pressure from broad institutional divestment, which could lead to further price declines.
- Two Sigma’s move may reflect a high-conviction, model-driven bet, but it is dwarfed by the scale of selling from mega-passive players.
Documents Analyzed
This report is based on 1 institutional 13F filing from SEC EDGAR.
| Document | Accession Number |
|---|---|
| INST-CLUSTER Data (Synthetic) | inst-cluster-ARKK-2025-Q4 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 15, 2026 6w ago | Institutional Cluster | $81.75 $83.49 | ▲ +2.13% | ▲ +4.11% | — |
Jul 18, 2026 10w ago | Institutional Cluster | $74.95 $81.75 | ▲ +9.07% | ▲ +4.95% | — |
Feb 28, 2026 30w ago | Institutional Cluster | $74.22 $63.52 | ▲ +14.42% | ▲ +6.48% | — |
US Market Status
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