AII American Integrity Insurance Group, Inc.
Executive Summary
Three mega-passive institutional investors (BlackRock, State Street, Morgan Stanley) collectively more than doubled their AII positions in Q3 2025, adding $10.2M in new holdings to a total of $12.7M. No sellers were detected. The buying is dominated by index/rebalancing flows rather than active fundamental conviction, and the stock's small $333M market cap means these additions likely reflect index inclusion or weighting adjustments rather than a shared alpha thesis.
Key Financial Metrics
Institutional Positions
Net institutional flow: $10.2M
▲ Buyers (3)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| BlackRock | DOUBLED | +253.7% | $9.8M | $7.5M |
| State Street | DOUBLED | +872.7% | $2.4M | $2.2M |
| Morgan Stanley | DOUBLED | +731.6% | $415.0K | $374.0K |
Actionable Insight
The cluster is entirely passive/index-driven, likely reflecting AII's inclusion in or rebalancing of Russell/other indices rather than fundamental conviction. Monitor next 13F for active manager interest — without that, the signal is weak. Historical calibration shows AII reports have underperformed by -3.49% at T+20, so avoid chasing this passive accumulation.
Key Facts
- 3 institutional buyers, 0 sellers in Q3 2025
- Aggregate institutional buying: $10.2M net new value (total holdings $12.7M)
- BlackRock doubled its stake (+253.7% shares), now holds $9.8M
- State Street nearly 10x'd its position (+872.7% shares), now holds $2.4M
- Morgan Stanley increased 7.3x (+731.6% shares), now holds $415K
- All three buyers are mega-passive index fund managers, not active hedge funds
- No institutional selling detected in the quarter
Financial Impact
3 institutions accumulated $10.2M in net new AII holdings during Q3 2025, bringing total disclosed institutional holdings to $12.7M
Risk Factors
- Passive buying provides no fundamental thesis — may reverse on next index rebalance
- Historical AII reports have averaged -3.49% T+20 returns, suggesting poor timing signals
- No active manager participation reduces conviction signal strength
Market Snapshot
Documents Analyzed
This report is based on 1 institutional 13F filing from SEC EDGAR.
| Document | Accession Number |
|---|---|
| INST-CLUSTER Data (Synthetic) | inst-cluster-AII-2025-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
|
Jun 11, 2026
7d ago
|
Insider Buy
| $17.01 $16.67 | ▼ −2.00% | ▼ −3.76% | — |
|
Jun 11, 2026
7d ago
|
Institutional Cluster
| $16.86 $17.01 | ▲ +0.89% | ▲ +0.35% | — |
|
May 27, 2026
22d ago
|
Insider Cluster
| $16.60 $16.36 | ▼ −1.45% | ▼ −1.69% | — |
|
May 27, 2026
22d ago
|
Insider Cluster
| $16.60 $16.36 | ▼ −1.45% | ▼ −1.69% | — |
|
May 20, 2026
29d ago
|
8-K
| $16.86 $17.01 | ▲ +0.89% | ▲ +0.44% | — |
|
Apr 17, 2026
8w ago
|
DEFA14A
| $19.26 $18.99 | ▼ −1.40% | ▼ −0.75% | — |
|
Feb 24, 2026
16w ago
|
8-K
| $19.01 $19.77 | ▲ +3.99% | ▲ +4.53% | — |
US Market Status
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