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 | |
|---|---|---|---|---|---|---|
3326
CALL
FuboTV Inc
FUBO
$256M
| $606K | ﹤0.01% |
40,083
-56,117
| -58% | -$1.03M |
|
3327
CALL
Liberty Energy
LBRT
$2.75B
| $606K | ﹤0.01% |
30,500
+14,800
| +94% | +$274K |
|
3328
ProShares Ultra Bitcoin ETF
BITU
$362M
| $606K | ﹤0.01% |
12,275
+8,084
| +193% | +$345K |
|
3329
PUT
ImmunityBio
IBRX
$7.32B
| $604K | ﹤0.01% |
236,000
+51,400
| +28% | +$214K |
|
3330
CALL
MaxLinear
MXL
$5.88B
| $603K | ﹤0.01% |
30,500
+4,900
| +19% | +$78.6K |
|
3331
CALL
Porch Group
PRCH
$1.39B
| $603K | ﹤0.01% |
122,700
+63,800
| +108% | +$205K |
|
|
HELP
3332
PUT
Cybin Inc
HELP
$477M
| $600K | ﹤0.01% |
+68,100
| New | +$692K |
|
|
EWCZ
3333
CALL
DELISTED
European Wax Center
EWCZ
| $600K | ﹤0.01% |
90,100
+17,700
| +24% | +$116K |
|
|
HSAI
3334
Hesai Group
HSAI
$2.42B
| $600K | ﹤0.01% |
+43,484
| New | +$306K |
|
3335
PUT
Onto Innovation
ONTO
$13B
| $600K | ﹤0.01% |
3,600
+1,100
| +44% | +$201K |
|
|
TDAY
3336
CALL
USA Today Co
TDAY
$1.22B
| $599K | ﹤0.01% |
118,500
+91,000
| +331% | +$483K |
|
3337
PUT
Smith & Wesson
SWBI
$666M
| $598K | ﹤0.01% |
59,200
+27,700
| +88% | +$347K |
|
3338
CALL
Tandem Diabetes Care
TNDM
$1.18B
| $597K | ﹤0.01% |
16,600
-7,100
| -30% | -$240K |
|
3339
PUT
VEON
VEON
$3.58B
| $597K | ﹤0.01% |
+14,900
| New | +$495K |
|
3340
Beazer Homes USA
BZH
$903M
| $596K | ﹤0.01% |
21,715
+20,056
| +1,209% | +$641K |
|
|
TGNA
3341
CALL
DELISTED
TEGNA Inc
TGNA
| $596K | ﹤0.01% |
32,600
-51,200
| -61% | -$896K |
|
3342
PUT
Vir Biotechnology
VIR
$1.48B
| $596K | ﹤0.01% |
81,300
+76,600
| +1,630% | +$604K |
|
|
AMPS
3343
CALL
DELISTED
Altus Power
AMPS
| $596K | ﹤0.01% |
146,500
+109,100
| +292% | +$399K |
|
3344
PUT
Mistras Group
MG
$495M
| $594K | ﹤0.01% |
+65,600
| New | +$646K |
|
3345
PUT
Flutter Entertainment
FLUT
$18.4B
| $594K | ﹤0.01% |
2,300
-9,500
| -81% | -$2.4M |
|
3346
CALL
Atomera
ATOM
$203M
| $593K | ﹤0.01% |
51,200
+40,100
| +361% | +$231K |
|
3347
Marvell Technology
MRVL
$170B
| $593K | ﹤0.01% |
5,375
-31,725
| -86% | -$2.95M |
|
3348
CALL
OppFi
OPFI
$804M
| $593K | ﹤0.01% |
77,500
-28,700
| -27% | -$181K |
|
3349
CALL
SelectQuote
SLQT
$128M
| $593K | ﹤0.01% |
159,600
| – | – |
|
3350
Noble Corp
NE
$6.88B
| $592K | ﹤0.01% |
+18,872
| New | +$625K |
|
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.