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 | |
|---|---|---|---|---|---|---|
4676
Televisa
TV
$1.49B
| $170K | ﹤0.01% |
+101,517
| New | +$220K |
|
4677
CALL
ProFrac Holding
ACDC
$653M
| $169K | ﹤0.01% |
21,800
+10,900
| +100% | +$78.3K |
|
4678
CALL
APi Group
APG
$16.7B
| $169K | ﹤0.01% |
7,050
-300
| -4% | -$7.13K |
|
4679
Babcock & Wilcox
BW
$1.18B
| $169K | ﹤0.01% |
103,076
+75,391
| +272% | +$159K |
|
4680
Cooper Companies
COO
$14.2B
| $169K | ﹤0.01% |
1,846
-683
| -27% | -$69.6K |
|
4681
American Coastal Insurance
ACIC
$536M
| $168K | ﹤0.01% |
12,536
-4,508
| -26% | -$56.3K |
|
4682
Euronet Worldwide
EEFT
$3.19B
| $168K | ﹤0.01% |
1,643
+1,116
| +212% | +$114K |
|
4683
Trinity Capital Inc.
TRIN
$1.58B
| $168K | ﹤0.01% |
+11,646
| New | +$164K |
|
4684
Ares Management
ARES
$28.1B
| $167K | ﹤0.01% |
+946
| New | +$161K |
|
4685
PUT
Kodiak Gas Services
KGS
$5.55B
| $167K | ﹤0.01% |
4,100
-700
| -15% | -$25.3K |
|
4686
PUT
Insight Enterprises
NSIT
$3.85B
| $167K | ﹤0.01% |
+1,100
| New | +$197K |
|
|
LAR
4687
Lithium Argentina AG
LAR
$906M
| $167K | ﹤0.01% |
64,055
+42,355
| +195% | +$138K |
|
4688
CALL
CMS Energy
CMS
$23B
| $166K | ﹤0.01% |
2,500
+1,900
| +317% | +$131K |
|
4689
CALL
Compass Diversified
CODI
$752M
| $166K | ﹤0.01% |
7,200
-3,200
| -31% | -$71.8K |
|
|
EWCZ
4690
DELISTED
European Wax Center
EWCZ
| $166K | ﹤0.01% |
+24,901
| New | +$164K |
|
|
HIVE
4691
HIVE Digital Technologies
HIVE
$679M
| $166K | ﹤0.01% |
58,589
-54,626
| -48% | -$205K |
|
4692
Morgan Stanley Direct Lending Fund
MSDL
$1.25B
| $166K | ﹤0.01% |
8,064
+3,112
| +63% | +$63.7K |
|
4693
Perion Network
PERI
$380M
| $166K | ﹤0.01% |
+19,608
| New | +$165K |
|
4694
PUT
Target Hospitality
TH
$1.43B
| $166K | ﹤0.01% |
17,200
-3,500
| -17% | -$29.3K |
|
|
ALLK
4695
DELISTED
Allakos
ALLK
| $165K | ﹤0.01% |
136,848
+41,175
| +43% | +$43.2K |
|
4696
PUT
Capital Southwest
CSWC
$1.47B
| $165K | ﹤0.01% |
7,600
-1,600
| -17% | -$37.7K |
|
4697
Goldman Sachs BDC
GSBD
$997M
| $165K | ﹤0.01% |
+13,680
| New | +$180K |
|
|
LSEA
4698
DELISTED
Landsea Homes
LSEA
| $165K | ﹤0.01% |
+19,545
| New | +$211K |
|
|
LTC
4699
CALL
LTC Properties
LTC
$2.13B
| $165K | ﹤0.01% |
4,800
+1,300
| +37% | +$48K |
|
4700
PUT
Paysafe
PSFE
$443M
| $165K | ﹤0.01% |
12,400
-5,300
| -30% | -$107K |
|
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.