The passive-heavy buying (BlackRock, State Street, BofA, Schwab all doubling) likely reflects index rebalancing or ETF inflows rather than a fundamental catalyst. However, Franklin Resources' $5.0M add signals some active conviction. Monitor next 13F for unwinding risk — the 45-day lag means this cluster may already be stale. The lack of insider buying reduces conviction; treat this as a moderate bullish signal, not a strong one.
Executive Summary
A strong institutional buying cluster formed in AMBQ during 2026-Q1, with 17 buyers accumulating $29.1M net versus just 1 seller trimming $416K. The buying is dominated by mega-passive funds (BlackRock, State Street, BofA, Schwab) doubling their positions, alongside active asset managers like Franklin Resources adding $5.0M. The absence of insider buying and the passive-heavy composition temper the signal, but the sheer breadth and dollar scale suggest a shared positive thesis on Ambiq's semiconductor positioning.
Key Financial Metrics
Institutional Positions
Net institutional flow: $29.1M
▲ Buyers (17)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| BlackRock | DOUBLED | +229.1% | $25.7M | $17.0M |
| Franklin Resources | ADD | +76.1% | $13.8M | $5.0M |
| State Street | DOUBLED | +207.9% | $6.6M | $4.2M |
| Schwab | DOUBLED | +139.6% | $2.1M | $1.1M |
| BofA | DOUBLED | +632.3% | $1.2M | $1.0M |
▼ Sellers (1)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Mirae Asset Global Etfs Holdin | TRIM | -61.7% | $632.0K | -$416.3K |
Key Facts
- 17 institutional buyers vs 1 seller in 2026-Q1
- Net buying of $29.1M across all tracked institutions
- BlackRock doubled its stake to $25.7M (+$17.0M), the largest single buyer
- Franklin Resources added $5.0M to reach $13.8M
- State Street doubled to $6.6M (+$4.2M)
- Only 1 seller: Mirae Asset trimmed $416K (-61.7%)
- No open-market insider buying (confluence score 20/100, divergent)
- Cluster is 5 mega-passive + 5 active asset managers — passive-dominated
Financial Impact
17 institutions accumulated $51.4M in current holdings, net change of +$29.1M; 1 seller reduced by $416K
Risk Factors
- 45-day 13F reporting lag — positions may already be unwound
- Passive-dominated cluster (5 of 10 tracked funds are mega-passive) weakens signal
- No insider buying to corroborate 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-AMBQ-2026-Q1 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 16, 2026 10d ago | Insider Cluster | $49.62 | awaiting T+20 | — | — |
Sep 17, 2026 5w ago | Insider Cluster | $65.46 $49.88 | ▲ +23.80% | ▲ +24.01% | — |
Sep 15, 2026 5w ago | Insider Cluster | $59.90 $51.55 | ▲ +13.94% | ▲ +16.00% | — |
Sep 9, 2026 6w ago | Insider Cluster | $60.66 $58.90 | ▼ −2.90% | ▼ −5.28% | — |
Sep 2, 2026 7w ago | Insider Cluster | $56.43 $68.18 | ▲ +20.82% | ▲ +22.01% | — |
Aug 18, 2026 9w ago | Insider Cluster | $59.19 $62.35 | ▲ +5.34% | ▲ +6.18% | — |
Aug 15, 2026 10w ago | Institutional Cluster | $67.86 $60.85 | ▼ −10.33% | ▼ −8.35% | — |
Aug 11, 2026 10w ago | 8-K | $65.29 $63.77 | ▼ −2.33% | ▼ −1.27% | — |
Jul 30, 2026 12w ago | 8-K | $63.23 $60.09 | ▼ −4.97% | ▼ −8.93% | — |
Jun 24, 2026 17w ago | EFFECT | $81.18 $77.55 | ▼ −4.47% | ▼ −6.40% | — |
US Market Status
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