# PARATEK PHARMACEUTICALS INC (PRTK)

> Institutional ownership reported to the SEC as of Q3 2023, from Form 13F filings. Source: https://holderbook.com/stocks/PRTK/

- Reporting holders: 1
- Reported value: $1.0K
- Held through calls: 0.0%
- Held through puts: 100.0%

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 |
|---|---|---|---|---|
| [SIMPLEX TRADING, LLC](https://holderbook.com/funds/1488542-simplex-trading-llc/) | $1.0K | 0 | 0.0% | 6 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q3 2023 | 1 | $1.0K |
| Q2 2023 | 68 | $47.6M |
| Q1 2023 | 65 | $59.3M |
| Q4 2022 | 76 | $68.9M |
| Q3 2022 | 70 | $60.4M |
| Q2 2022 | 82 | $44.7M |
| Q1 2022 | 97 | $82.3M |
| Q4 2021 | 99 | $116.5M |
| Q3 2021 | 102 | $118.5M |
| Q2 2021 | 116 | $169.6M |
| Q1 2021 | 110 | $171.6M |
| Q4 2020 | 110 | $153.4M |