Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6076
PUT
One Stop Systems
OSS
$303M
| $41K | ﹤0.01% |
12,400
+8,900
| +254% | +$22.6K |
|
6077
PUT
Pacer Trendpilot US Large Cap ETF
PTLC
$3.26B
| $41K | ﹤0.01% |
900
-200
| -18% | -$10.8K |
|
6078
Universal Technical Institute
UTI
$2.16B
| $41K | ﹤0.01% |
1,596
-3,772
| -70% | -$78.5K |
|
|
6079
PUT
Universal Technical Institute
UTI
$2.16B
| $41K | ﹤0.01% |
1,600
-1,900
| -54% | -$39.5K |
|
6080
Wrap Technologies
WRAP
$103M
| $41K | ﹤0.01% |
+19,429
| New | +$32K |
|
6081
PUT
Arq
ARQ
$84.6M
| $41K | ﹤0.01% |
5,500
+3,400
| +162% | +$22.4K |
|
|
ACRE
6082
Ares Commercial Real Estate
ACRE
$236M
| $40K | ﹤0.01% |
6,930
+2,748
| +66% | +$18.5K |
|
|
ARI
6083
PUT
Apollo Commercial Real Estate
ARI
$867M
| $40K | ﹤0.01% |
4,700
-38,900
| -89% | -$350K |
|
|
DCH
6084
PUT
Dauch Corp
DCH
$1.34B
| $40K | ﹤0.01% |
6,900
-36,200
| -84% | -$227K |
|
6085
PUT
CG Oncology
CGON
$6.28B
| $40K | ﹤0.01% |
1,400
+200
| +17% | +$6.84K |
|
6086
Capital Group Core Equity ETF
CGUS
$11.4B
| $40K | ﹤0.01% |
+1,159
| New | +$40.6K |
|
6087
PUT
China Yuchai International
CYD
$1.77B
| $40K | ﹤0.01% |
+4,200
| New | +$44.1K |
|
6088
PUT
GFL Environmental
GFL
$14.9B
| $40K | ﹤0.01% |
900
-13,900
| -94% | -$605K |
|
|
GOOD
6089
PUT
Gladstone Commercial Corp
GOOD
$605M
| $40K | ﹤0.01% |
2,500
-500
| -17% | -$8.28K |
|
6090
CALL
Ivanhoe Electric
IE
$1.45B
| $40K | ﹤0.01% |
5,300
+200
| +4% | +$1.85K |
|
|
ODP
6091
PUT
DELISTED
ODP
ODP
| $40K | ﹤0.01% |
1,800
-1,500
| -45% | -$41.7K |
|
6092
Precigen
PGEN
$2.24B
| $40K | ﹤0.01% |
36,333
+34,339
| +1,722% | +$29.3K |
|
|
REFI
6093
CALL
Chicago Atlantic Real Estate Finance
REFI
$248M
| $40K | ﹤0.01% |
2,600
-3,400
| -57% | -$53.5K |
|
6094
CALL
Regenxbio
RGNX
$620M
| $40K | ﹤0.01% |
5,200
-1,400
| -21% | -$13.1K |
|
6095
ReNew
RNW
$2.27B
| $40K | ﹤0.01% |
+5,969
| New | +$36.3K |
|
6096
Trex
TREX
$4.51B
| $40K | ﹤0.01% |
590
+319
| +118% | +$22.5K |
|
6097
UDR
UDR
$12.3B
| $40K | ﹤0.01% |
+937
| New | +$41.4K |
|
|
PRMB
6098
PUT
Primo Brands
PRMB
$8.24B
| $40K | ﹤0.01% |
+1,300
| New | +$38.5K |
|
6099
CALL
Amneal Pharmaceuticals
AMRX
$5.85B
| $39K | ﹤0.01% |
5,000
+4,200
| +525% | +$35.2K |
|
|
JBIO
6100
CALL
Jade Biosciences
JBIO
$1.2B
| $39K | ﹤0.01% |
426
+397
| +1,369% | +$34.2K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.