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US INSIDER PROFILE · NON-SCORING RESEARCH
Guerrero Ramiro
Director
Identity: SEC reporting-owner CIK · Reporting-owner CIK: 0001913253
Purchase history
- Companies traded
- 1
- Purchases · 12M
- 4
- Purchases · 24M
- 10
- Average purchase
- $87.5K
- Median purchase
- $74.9K
- Gross purchase value
- $874.5K
Companies: MAIA Biotechnology, Inc.
10 SEC accession(s) · 0 joint-owner event(s). Values are reported Form 4 transaction values in USD.
Qualifying purchase disclosures
| Published | Company | Ticker | Role | Reported value | SEC source |
|---|---|---|---|---|---|
| 2026-09-14 | MAIA Biotechnology, Inc. | MAIA | Director | $49.6K | Open filing |
| 2026-09-01 | MAIA Biotechnology, Inc. | MAIA | Director | $184.1K | Open filing |
| 2026-08-26 | MAIA Biotechnology, Inc. | MAIA | Director | $2.4K | Open filing |
| 2026-08-24 | MAIA Biotechnology, Inc. | MAIA | Director | $16.3K | Open filing |
| 2025-05-12 | MAIA Biotechnology, Inc. | MAIA | Director | $30.0K | Open filing |
| 2025-03-05 | MAIA Biotechnology, Inc. | MAIA | Director | $110.0K | Open filing |
| 2025-03-05 | MAIA Biotechnology, Inc. | MAIA | Director | $50.0K | Open filing |
| 2025-02-25 | MAIA Biotechnology, Inc. | MAIA | Director | $110.0K | Open filing |
| 2024-12-13 | MAIA Biotechnology, Inc. | MAIA | Director | $99.9K | Open filing |
| 2024-11-04 | MAIA Biotechnology, Inc. | MAIA | Director | $222.2K | Open filing |
Post-purchase outcomes
Excess return = stock return − S&P 500 ETF (SPY adjusted close) return. Returns start on the first shared trading session on or after publication.
| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 10Developing | 100.0% (10/10) | 20.0% (2/10) | -1.8% | -2.9% | -13.8% |
| 20D | 10Developing | 100.0% (10/10) | 10.0% (1/10) | -8.2% | -7.7% | -29.6% |
| 60D | 6Developing | 100.0% (6/6) | 50.0% (3/6) | -7.2% | -12.3% | -39.6% |
| 120D | 6Developing | 100.0% (6/6) | 0.0% (0/6) | -18.6% | -22.8% | -53.1% |
Research patterns
- First purchase in 12M
- 1/9
- Large purchase ≥ $100k
- 4/10
- Cluster buying · 15D
- 6/10
- Buying the dip
- 10/10
Routine / opportunistic: Not classifiable. These labels never affect the score or ranking.
Small samples remain visible but are not scored. This research enrichment never affects US-v1.1.