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 | |
|---|---|---|---|---|---|---|
5201
CXApp
CXAI
$13.4M
| $96K | ﹤0.01% |
+53,239
| New | +$85.3K |
|
5202
FLEX LNG
FLNG
$1.69B
| $96K | ﹤0.01% |
4,186
+942
| +29% | +$22.8K |
|
5203
PUT
Gates Industrial Corporation Ltd.
GTES
$7.08B
| $96K | ﹤0.01% |
4,700
+3,400
| +262% | +$68.6K |
|
5204
Home BancShares
HOMB
$6.23B
| $96K | ﹤0.01% |
+3,426
| New | +$98.9K |
|
5205
Innovative Industrial Properties
IIPR
$1.71B
| $96K | ﹤0.01% |
+1,453
| New | +$164K |
|
5206
PUT
LiveWire
LVWR
$371M
| $96K | ﹤0.01% |
20,000
| – | – |
|
5207
PUT
Shoals Technologies Group
SHLS
$1.47B
| $96K | ﹤0.01% |
17,500
-72,500
| -81% | -$368K |
|
5208
CALL
SkinHealth Systems
SKIN
$88.8M
| $96K | ﹤0.01% |
60,800
+13,900
| +30% | +$21.8K |
|
5209
PUT
USA Compression Partners
USAC
$3.79B
| $96K | ﹤0.01% |
4,100
-16,800
| -80% | -$384K |
|
|
ATSG
5210
CALL
DELISTED
Air Transport Services Group
ATSG
| $96K | ﹤0.01% |
4,400
-1,900
| -30% | -$37.6K |
|
5211
Central Garden & Pet Co
CENT
$2.69B
| $95K | ﹤0.01% |
2,467
-5,303
| -68% | -$197K |
|
5212
CALL
Enova International
ENVA
$6.33B
| $95K | ﹤0.01% |
1,000
+200
| +25% | +$19.1K |
|
|
RAPT
5213
CALL
DELISTED
RAPT Therapeutics
RAPT
| $95K | ﹤0.01% |
7,575
+7,387
| +3,929% | +$93.8K |
|
5214
PUT
SLR Investment Corp
SLRC
$686M
| $95K | ﹤0.01% |
5,900
+5,800
| +5,800% | +$92.2K |
|
|
VLRS
5215
PUT
Controladora Vuela Compania de Aviacion
VLRS
$900M
| $95K | ﹤0.01% |
+12,900
| New | +$96.6K |
|
5216
PUT
Aaon
AAON
$7.3B
| $94K | ﹤0.01% |
800
-10,700
| -93% | -$1.31M |
|
5217
CALL
ADT
ADT
$5.6B
| $94K | ﹤0.01% |
13,700
+3,300
| +32% | +$24K |
|
5218
CALL
Asure Software
ASUR
$230M
| $94K | ﹤0.01% |
+10,000
| New | +$92K |
|
5219
Mission Produce
AVO
$1.11B
| $94K | ﹤0.01% |
+6,582
| New | +$85K |
|
5220
China Automotive Systems
CAAS
$136M
| $94K | ﹤0.01% |
23,106
+10,637
| +85% | +$46.5K |
|
5221
CALL
Clean Energy Fuels
CLNE
$427M
| $94K | ﹤0.01% |
37,800
+7,700
| +26% | +$21.8K |
|
5222
CALL
Fortress Biotech
FBIO
$104M
| $94K | ﹤0.01% |
46,900
+9,400
| +25% | +$17K |
|
5223
LKQ Corp
LKQ
$5.72B
| $94K | ﹤0.01% |
2,563
-31,032
| -92% | -$1.19M |
|
5224
PUT
Northwest Natural Holdings
NWN
$2.06B
| $94K | ﹤0.01% |
2,400
+2,100
| +700% | +$85.7K |
|
|
OBE
5225
Obsidian Energy
OBE
$716M
| $94K | ﹤0.01% |
16,325
+7,511
| +85% | +$42.8K |
|
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.