# PROTAGENIC THERAPEUTICS INC (PTIX)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/PTIX/

- Reporting holders: 2
- Reported value: $25.4K
- Shares held by institutions: 66,783 of 1,810,208 outstanding
- Held through calls: 0.0%
- Held through puts: 0.0%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [DRW Securities, LLC](https://holderbook.com/funds/1481986-drw-securities-llc/) | $16.4K | 41,783 | 0.0% | 4 |
| [FNY Investment Advisers, LLC](https://holderbook.com/funds/1742998-fny-investment-advisers-llc/) | $9.0K | 25,000 | 0.0% | 4 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 2 | $25.4K |
| Q1 2026 | 4 | $44.4K |
| Q4 2025 | 11 | $150.9K |
| Q3 2025 | 10 | $344.4K |
| Q2 2025 | 10 | $258.1K |
| Q1 2025 | 8 | $65.9K |
| Q4 2024 | 8 | $75.0K |
| Q3 2024 | 10 | $104.3K |
| Q2 2024 | 10 | $145.7K |
| Q1 2024 | 9 | $205.6K |
| Q4 2023 | 9 | $106.8K |
| Q3 2023 | 8 | $179.5K |