The cluster is mixed with net selling of $7.1M, but the strong earnings beat and raised guidance provide a fundamental tailwind. The lack of insider buying and the selling by large holders (Congress, Citigroup) suggest caution. Monitor next 8-K for order backlog and ECP/advanced packaging growth trajectory to confirm the thesis.
Executive Summary
Q2 2026 institutional 13F cluster for ACMR shows a mixed picture: 5 buyers added $25M in new positions (led by Russell Investments Group adding $21.8M), while 4 sellers trimmed $32.1M (led by Congress Asset Management and New York State Common Retirement Fund). The cluster follows a strong Q2 earnings beat (revenue +36% YoY, EPS +79% vs consensus) and raised FY2026 guidance, but the selling side is larger in dollar terms, suggesting profit-taking after the stock's recent run. The cross-filing context (earnings + offering) amplifies the signal, but the divergent insider activity (score 20/100, no open-market insider buying) tempers conviction.
Key Financial Metrics
Institutional Positions
Net institutional flow: -$7.1M
▲ Buyers (5)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Russell Investments Group | ADD | +37.8% | $28.1M | $21.8M |
| Fifth Third Bancorp | DOUBLED | +102.1% | $2.9M | $2.5M |
| Pnc Financial Services Group | ADD | +63.2% | $282.0K | $228.0K |
| Walleye Capital | DOUBLED | +148.8% | $275.0K | $241.0K |
| Farther Finance Advisors | DOUBLED | +266.9% | $253.0K | $231.0K |
▼ Sellers (4)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Congress Asset Management | TRIM | -34.1% | $13.4M | -$15.0M |
| New York State Common Retirement Fund | TRIM | -26.2% | $10.2M | -$14.1M |
| Citigroup | TRIM | -66.1% | $24.4M | -$2.2M |
| State Of New Jersey Common Pension Fund D | TRIM | -51.5% | $1.4M | -$763.0K |
Key Facts
- 5 institutional buyers added $25.0M in new ACMR positions during Q2 2026
- 4 institutional sellers trimmed $32.1M, led by Congress Asset Management (-34.1%) and Citigroup (-66.1%)
- Russell Investments Group was the largest buyer, adding $21.8M (+37.8% shares)
- Filing follows a strong Q2 2026 earnings beat: revenue $292.9M (+36% YoY), non-GAAP EPS $0.61 (+79% vs consensus $0.34)
- Full-year 2026 revenue guidance raised to $1.125B-$1.175B
- No open-market insider buying during the quarter (confluence score 20/100, divergent)
Financial Impact
5 buyers accumulated $25.0M in new positions while 4 sellers reduced holdings by $32.1M, net selling of $7.1M
Risk Factors
- Profit-taking by large institutional holders (Congress, Citigroup) may cap near-term upside
- No insider open-market buying to corroborate the bullish earnings narrative
- 13F data is 45+ days stale; positions may have been unwound since quarter-end
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-ACMR-2026-Q2 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 22, 2026 5w ago | Insider Cluster | $77.35 $75.80 | ▼ −2.00% | ▼ −3.30% | — |
Aug 8, 2026 7w ago | Institutional Cluster | $79.41 $77.20 | ▼ −2.78% | ▼ −1.87% | — |
Aug 7, 2026 8w ago | 8-K | $83.80 $74.44 | ▼ −11.17% | ▼ −10.77% | — |
Jul 18, 2026 10w ago | Institutional Cluster | $82.52 $85.64 | ▲ +3.78% | ▼ −0.34% | — |
Jun 11, 2026 16w ago | Institutional Cluster | $91.70 $106.04 | ▲ +15.64% | ▲ +13.75% | — |
Jun 6, 2026 16w ago | Insider Cluster | $80.57 $98.52 | ▲ +22.28% | ▲ +20.65% | — |
May 29, 2026 17w ago | 8-K | $82.05 $126.89 | ▲ +54.65% | ▲ +55.95% | — |
May 22, 2026 19w ago | 8-K | $73.35 $95.80 | ▲ +30.61% | ▲ +32.02% | — |
May 15, 2026 19w ago | 8-K | $63.25 $91.18 | ▲ +44.16% | ▲ +42.58% | — |
May 12, 2026 20w ago | 424B5 | $64.75 $91.70 | ▼ −41.62% | ▼ −42.23% | — |
US Market Status
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