Managers / Q1 2021 · view latest →
SIMPLEX TRADING, LLC
CIK 0001488542 · 230 S. LASALLE STREET, SUITE 08-500, CHICAGO, IL, 60604 · 312-360-2466
Reported Value
$55.7B
Q1 2021
Positions
10,782
Filings on Record
31
2019–present window
Filed
Apr 26, 2021
original filing
Summary
Simplex Trading, Llc reported $55.7B in U.S.-listed holdings across 10,782 positions for Q1 2021.
Compared with Q4 2020, the fund opened 2078 new positions and exited 1082.
Reported Value by Quarter
13F Reported Value
Portfolio Composition
By security type
- Other · 97.1% · $54.1B
- Common Stock · 2.0% · $1.1B
- ETP · 0.4% · $232M
- ADR · 0.3% · $190M
- REIT · 0.1% · $30M
- Other · 0.0% · $6M
Quarter-over-Quarter Changes full breakdown →
Holdings — Q1 2021
Filing History
| Quarter | Reported Value | Positions | Filed | Type | Links |
|---|---|---|---|---|---|
| Q1 2026 | $149.1B | 10,161 | May 14, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q4 2025 | $177.4B | 9,381 | Feb 11, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q3 2025 | $195M | 10,359 | Nov 12, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q2 2025 | $175M | 9,904 | Aug 5, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q1 2025 | $156M | 9,739 | May 12, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q4 2024 | $179M | 9,701 | Feb 11, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q3 2024 | $170M | 9,646 | Nov 8, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q2 2024 | $162M | 9,954 | Jul 25, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q1 2024 | $173M | 10,037 | Apr 25, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q4 2023 | $156M | 9,984 | Feb 2, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q3 2023 | $127M | 9,858 | Nov 1, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q2 2023 | $122M | 10,161 | Aug 4, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q1 2023 | $114M | 10,304 | Apr 27, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q4 2022 | $91.9B | 10,527 | Feb 2, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q3 2022 | $88.5B | 11,393 | Nov 4, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q2 2022 | $94.1B | 11,351 | Aug 3, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q1 2022 | $109.4B | 11,559 | May 2, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q4 2021 | $99.0B | 11,473 | Feb 23, 2022 | RESTATEMENT | changes · EDGAR ↗ |
| Q3 2021 | $107.1B | 10,900 | Oct 28, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q2 2021 | $103.5B | 11,103 | Aug 12, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q1 2021 | $55.7B | 10,782 | Apr 26, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q4 2020 | $77.2B | 9,759 | Feb 2, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q3 2020 | $73.5B | 9,133 | Oct 14, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q2 2020 | $62.7B | 8,797 | Jul 13, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q1 2020 | $56.7B | 8,558 | Apr 29, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q4 2019 | $45.7B | 8,124 | Feb 5, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q3 2019 | $35.2B | 8,137 | Oct 15, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q2 2019 | $36.6B | 7,921 | Jul 26, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q1 2019 | $36.0B | 7,930 | Apr 18, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q4 2018 | $34.1B | 7,843 | Jan 16, 2019 | 13F-HR | changes · EDGAR ↗ |
13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.