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 | |
|---|---|---|---|---|---|---|
|
HOUS
4601
DELISTED
Anywhere Real Estate
HOUS
| $183K | ﹤0.01% |
55,605
+26,203
| +89% | +$112K |
|
4602
The Bancorp
TBBK
$2.81B
| $183K | ﹤0.01% |
+3,494
| New | +$191K |
|
|
CRDL
4603
CALL
Cardiol Therapeutics
CRDL
$133M
| $182K | ﹤0.01% |
142,700
+91,300
| +178% | +$154K |
|
4604
CALL
Lloyds Banking Group
LYG
$85.2B
| $182K | ﹤0.01% |
67,100
+61,300
| +1,057% | +$175K |
|
4605
Prospect Capital
PSEC
$1.08B
| $182K | ﹤0.01% |
42,409
+27,531
| +185% | +$132K |
|
4606
SkyWater Technology
SKYT
$1.5B
| $182K | ﹤0.01% |
13,231
+8,609
| +186% | +$85.5K |
|
4607
CALL
TPG
TPG
$6.76B
| $182K | ﹤0.01% |
2,900
+700
| +32% | +$46K |
|
4608
CALL
Westlake Chemical Partners
WLKP
$772M
| $182K | ﹤0.01% |
7,900
-9,300
| -54% | -$213K |
|
4609
Argan
AGX
$6.9B
| $181K | ﹤0.01% |
+1,323
| New | +$182K |
|
4610
PUT
Astec Industries
ASTE
$1.17B
| $181K | ﹤0.01% |
5,400
+3,800
| +238% | +$131K |
|
4611
PUT
Porch Group
PRCH
$1.35B
| $181K | ﹤0.01% |
36,900
-4,500
| -11% | -$14.4K |
|
4612
PUT
Cardiff Oncology
CRDF
$63M
| $180K | ﹤0.01% |
41,700
+11,100
| +36% | +$34.7K |
|
|
CUK
4613
CALL
DELISTED
Carnival PLC
CUK
| $180K | ﹤0.01% |
8,000
+500
| +7% | +$10.6K |
|
4614
CALL
First Industrial Realty Trust
FR
$8.66B
| $180K | ﹤0.01% |
+3,600
| New | +$191K |
|
4615
CALL
FS KKR Capital
FSK
$3.01B
| $180K | ﹤0.01% |
8,300
-52,300
| -86% | -$1.1M |
|
|
GB
4616
PUT
DELISTED
Global Blue Group Holding
GB
| $180K | ﹤0.01% |
26,000
+13,800
| +113% | +$79.2K |
|
4617
Philips
PHG
$25.5B
| $180K | ﹤0.01% |
7,712
-125,811
| -94% | -$3.25M |
|
4618
CVR Energy
CVI
$3.48B
| $179K | ﹤0.01% |
+9,577
| New | +$194K |
|
4619
Dine Brands
DIN
$462M
| $179K | ﹤0.01% |
5,976
-11,839
| -66% | -$381K |
|
4620
CALL
Extra Space Storage
EXR
$32.3B
| $179K | ﹤0.01% |
1,200
-6,200
| -84% | -$1.02M |
|
4621
CALL
National Beverage
FIZZ
$3.06B
| $179K | ﹤0.01% |
4,200
-4,700
| -53% | -$220K |
|
4622
PUT
NNN REIT
NNN
$9.29B
| $179K | ﹤0.01% |
4,400
+3,800
| +633% | +$168K |
|
4623
CALL
Rhythm Pharmaceuticals
RYTM
$7.31B
| $179K | ﹤0.01% |
3,200
-14,400
| -82% | -$795K |
|
4624
PUT
Boston Beer
SAM
$1.95B
| $179K | ﹤0.01% |
600
-900
| -60% | -$272K |
|
4625
Spire Global
SPIR
$408M
| $179K | ﹤0.01% |
+12,728
| New | +$155K |
|
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.