The cluster shows a net buying bias but the buying is dominated by passive rebalancing, not active conviction. Watch for a 2025-Q4 13F update to see if passive adds reverse; if active names join on the buy side, the signal strengthens.
Executive Summary
Two mega-passives (Morgan Stanley, Invesco) and two quants (D.E. Shaw, Two Sigma) added $31M in AMRX during Q3, while two asset managers (RenTech, UBS) cut $4M.
Key Financial Metrics
Institutional Positions
Net institutional flow: $27.0M
▲ Buyers (4)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Morgan Stanley | ADD | +40.3% | $35.1M | $14.9M |
| D.E. Shaw | ADD | +69.5% | $15.7M | $8.2M |
| Invesco | ADD | +43.5% | $16.9M | $7.4M |
| Two Sigma | DOUBLED | +291.9% | $696.0K | $552.0K |
▼ Sellers (2)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| RenTech | NEAR_EXIT | -79% | $3.5M | -$2.6M |
| Ubs Am, A Distinct Business Un | TRIM | -50.3% | $3.8M | -$1.5M |
Key Facts
- 4 buyers added $31.0M in aggregate; 2 sellers trimmed $4.0M — net buying bias but not overwhelming
- Morgan Stanley became the largest disclosed owner in the cluster at $35.1M (+40.3% shares, +$14.9M)
- Two Sigma nearly quadrupled a tiny position (+291.9%, to $696K) — a new stake exploration, not conviction
- RenTech exited 79% of its AMRX position (current $900K, down from $3.5M) — a signal of skepticism
- Active manager weight is low (UBS trim, RenTech near-exit); the buying side is almost entirely passive/quant
Financial Impact
4 institutions accumulated $31.0M in new AMRX positions while 2 institutions reduced holdings by $4.0M, net institutional accumulation of approximately $27M for the quarter
Risk Factors
- 45-day reporting lag means these Q3 positions may have been unwound in Q4
- Buying dominated by passive/quant funds with no active value or activist manager following up
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-AMRX-2025-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 23, 2026 4d ago | 8-K/A | $21.02 | awaiting T+60 | — | — |
Sep 18, 2026 5w ago | Press Release | $20.16 | awaiting T+60 | — | — |
Aug 16, 2026 10w ago | Institutional Cluster | $18.42 | awaiting T+60 | — | — |
Aug 14, 2026 10w ago | Insider Cluster | $18.42 | awaiting T+60 | — | — |
Aug 13, 2026 10w ago | Insider Cluster | $18.15 | awaiting T+60 | — | — |
Aug 10, 2026 11w ago | 8-K | $17.10 | awaiting T+60 | — | — |
Jul 30, 2026 12w ago | DEFA14A | $18.50 $20.38 | ▲ +10.16% | ▲ +7.70% | — |
Jul 17, 2026 14w ago | Press Release | $17.85 $20.03 | ▲ +12.21% | ▲ +7.53% | — |
Jun 29, 2026 17w ago | DEFM14A | $17.29 $19.50 | ▲ +12.78% | ▲ +8.40% | — |
Jun 29, 2026 17w ago | Press Release | $17.29 $19.50 | ▲ +12.78% | ▲ +8.40% | — |
US Market Status
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