The heavy selling by two large asset managers (Boston Trust Walden and TD Asset Management) in the same quarter is notable, but the simultaneous accumulation by active quant and asset manager funds (D.E. Shaw, Jane Street, Goldman Sachs) creates a mixed signal without insider confirmation. Monitor for any upcoming 10-Q or 8-K filing that could explain the divergence.
Executive Summary
Institutional cluster for AMPH shows mixed conviction in Q2 2026: 12 buyers accumulated $13.1M in new positions, led by Goldman Sachs (+$3.7M), D.E. Shaw (+$4.9M), and Jane Street (+$1.8M), while 8 sellers liquidated $59.1M, including full exits by Boston Trust Walden ($18.5M) and TD Asset Management ($30.2M). The massive selling by two major asset managers outweighs the buying by active quant and asset manager funds, but the signals net to mixed as buyers include well-known active managers with potential alpha.
Key Financial Metrics
Institutional Positions
Net institutional flow: -$46.0M
▲ Buyers (12)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| D.E. Shaw | ADD | +33.3% | $17.9M | $4.9M |
| Goldman Sachs | ADD | +53.4% | $10.2M | $3.7M |
| Jane Street Group | ADD | +93.3% | $3.6M | $1.8M |
▼ Sellers (8)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| TD Asset Management | EXIT | -100% | $30.2M | -$30.2M |
| Boston Trust Walden | EXIT | -100% | $18.5M | -$18.5M |
| Millennium | NEAR_EXIT | -91.4% | $7.3M | -$6.6M |
Key Facts
- 12 institutional buyers added $13.1M in net new positions, led by D.E. Shaw (+$4.9M), Goldman Sachs (+$3.7M), and Jane Street (+$1.8M)
- 8 institutional sellers reduced holdings by $59.1M, with two full exits: TD Asset Management ($30.2M) and Boston Trust Walden ($18.5M)
- Sellers include 2 quant funds (Citadel near-exit, Millennium near-exit -91.4%) and 2 mega-passive managers
- Active managers dominate the buying side (D.E. Shaw, Jane Street, Susquehanna, Citigroup, Russell Investments), but passive asset managers (Goldman Sachs, Wells Fargo) also added modestly
- No insider open-market buying to corroborate the institutional accumulation
- 13F data is as of June 30, 2026 with a 45-day lag; positions may have changed since quarter-end
Financial Impact
Net institutional activity: $13.1M in buying vs $59.1M in selling – net selling of approximately $46.0M. The selling is driven primarily by two full-exit funds ($48.7M) that were top-10 holders, representing a significant reduction in institutional ownership
Risk Factors
- 13F data is 45+ days stale; cluster may have been partially or fully unwound
- Full exits by two top-10 holders ($48.7M combined) suggest fundamental thesis concerns
- No insider buying to corroborate institutional accumulation — signals are divergent per 13F × Form 4 confluence score
- 13F does not capture short positions or options overlays, which could mask the true institutional 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-AMPH-2026-Q2 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 23, 2026 4w ago | Insider Cluster | $26.27 | awaiting T+60 | — | — |
Sep 21, 2026 4w ago | 144 | $24.32 | awaiting T+60 | — | — |
Aug 21, 2026 9w ago | Institutional Cluster | $21.60 | awaiting T+60 | — | — |
Aug 12, 2026 10w ago | Insider Cluster | $20.18 | awaiting T+60 | — | — |
Aug 11, 2026 10w ago | 144 | $20.31 | awaiting T+60 | — | — |
Jul 13, 2026 15w ago | 8-K | $19.29 $25.91 | ▲ +34.32% | ▲ +30.32% | — |
Jul 7, 2026 15w ago | 8-K | $18.88 $25.35 | ▼ −34.27% | ▼ −31.78% | — |
Apr 13, 2026 27w ago | DEFA14A | $21.38 $19.02 | ▼ −11.04% | ▼ −19.56% | — |
US Market Status
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