The Q4 cluster is overwhelmingly bullish but stale (45-day lag). Watch for Q1 2026 13F filings in May to see if these positions were maintained or reduced. The presence of both mega-passive and quant funds suggests a catalyst-driven thesis — monitor upcoming pipeline data or partnership announcements for confirmation.
Executive Summary
A strong institutional cluster formed in INBX during Q4 2025, with 10 buyers accumulating $172.5M in net new holdings against just 1 seller trimming a trivial $59K. The buying is dominated by mega-passive funds (State Street, Morgan Stanley, Capital Group, Invesco) and quant funds (D.E. Shaw, RenTech), suggesting broad-based conviction in the company's pipeline or valuation. The cluster is overwhelmingly one-sided and large in scale relative to the $1.3B market cap, but the 45-day reporting lag means positions may have been partially unwound since quarter-end.
Key Financial Metrics
Institutional Positions
Net institutional flow: $172.5M
▲ Buyers (10)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Morgan Stanley | DOUBLED | +163.7% | $92.3M | $77.3M |
| Capital Group | NEW | — | $33.3M | $33.3M |
| State Street | ADD | +83.9% | $29.6M | $22.8M |
| Norges Bank | NEW | — | $10.5M | $10.5M |
| D.E. Shaw | DOUBLED | +956.9% | $9.6M | $9.3M |
▼ Sellers (1)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| AllianceBernstein | TRIM | -53.5% | $648.0K | $59.0K |
Key Facts
- 10 institutional buyers added $172.5M in net new INBX holdings during Q4 2025
- Morgan Stanley doubled its position to $92.3M, the largest single buyer
- Capital Group and Norges Bank initiated new positions worth $33.3M and $10.5M respectively
- Only 1 seller (AllianceBernstein) trimmed a small position, with net change of just $59K
- Total buyer holdings reached $197.0M, representing ~15% of INBX's $1.3B market cap
- Quant funds D.E. Shaw and RenTech both more than quintupled their positions
Financial Impact
10 institutions accumulated $172.5M in net new INBX positions during Q4 2025, with total buyer holdings of $197.0M. The sole seller reduced holdings by a negligible $59K.
Risk Factors
- 13F data is 45+ days stale; positions may have been partially or fully unwound since quarter-end
- Cluster is dominated by passive/index funds (State Street, BofA, Wells Fargo, Invesco, Capital Group, Morgan Stanley) which may reflect index rebalancing rather than active conviction
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-INBX-2025-Q4 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 14, 2026 12d ago | Insider Buy | $90.50 | awaiting T+60 | — | — |
Sep 28, 2026 28d ago | Insider Cluster | $104.83 | awaiting T+60 | — | — |
Sep 17, 2026 5w ago | Insider Cluster | $109.35 | awaiting T+60 | — | — |
Sep 15, 2026 5w ago | Insider Cluster | $101.77 | awaiting T+60 | — | — |
Sep 15, 2026 5w ago | 144 | $101.77 | awaiting T+60 | — | — |
Sep 14, 2026 6w ago | 144 | $105.61 | awaiting T+60 | — | — |
Sep 11, 2026 6w ago | 144 | $109.27 | awaiting T+60 | — | — |
Sep 10, 2026 6w ago | Insider Cluster | $109.27 | awaiting T+60 | — | — |
Sep 8, 2026 6w ago | Insider Cluster | $112.86 | awaiting T+60 | — | — |
Sep 8, 2026 6w ago | Insider Buy | $112.86 | awaiting T+60 | — | — |
US Market Status
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