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 | |
|---|---|---|---|---|---|---|
2251
CALL
EPAM Systems
EPAM
$4.69B
| $1.87M | ﹤0.01% |
8,000
+1,900
| +31% | +$423K |
|
2252
CALL
Sabre
SABR
$656M
| $1.87M | ﹤0.01% |
512,200
+9,300
| +2% | +$34.1K |
|
2253
Fair Isaac
FICO
$28.7B
| $1.87M | ﹤0.01% |
938
-854
| -48% | -$1.82M |
|
2254
CALL
Antero Midstream
AM
$10.8B
| $1.86M | ﹤0.01% |
123,500
+64,800
| +110% | +$987K |
|
2255
PUT
Nano X Imaging
NNOX
$62.4M
| $1.86M | ﹤0.01% |
258,300
+70,400
| +37% | +$451K |
|
2256
CALL
StoneCo
STNE
$2.62B
| $1.86M | ﹤0.01% |
233,200
-35,700
| -13% | -$362K |
|
2257
CALL
Labcorp
LH
$24.3B
| $1.86M | ﹤0.01% |
8,100
-12,200
| -60% | -$2.8M |
|
2258
Wolfspeed
WOLF
$1.2B
| $1.86M | ﹤0.01% |
278,767
-204,046
| -42% | -$2.08M |
|
2259
TriNet
TNET
$2.84B
| $1.85M | ﹤0.01% |
+20,438
| New | +$1.89M |
|
2260
CALL
Hawaiian Electric Industries
HE
$2.33B
| $1.85M | ﹤0.01% |
190,400
-52,700
| -22% | -$533K |
|
2261
PUT
iShares Convertible Bond ETF
ICVT
$7.23B
| $1.85M | ﹤0.01% |
57,200
-56,400
| -50% | -$4.85M |
|
2262
PUT
MannKind Corp
MNKD
$1.28B
| $1.85M | ﹤0.01% |
287,100
+12,200
| +4% | +$81.8K |
|
|
XIFR
2263
XPLR Infrastructure LP
XIFR
$1.18B
| $1.84M | ﹤0.01% |
103,529
+55,467
| +115% | +$1.11M |
|
2264
CALL
Mettler-Toledo International
MTD
$26.8B
| $1.83M | ﹤0.01% |
1,500
-400
| -21% | -$522K |
|
2265
CALL
Hertz
HTZ
$572M
| $1.83M | ﹤0.01% |
500,900
+106,000
| +27% | +$383K |
|
2266
McDonald's
MCD
$188B
| $1.83M | ﹤0.01% |
+6,320
| New | +$1.88M |
|
|
AKRO
2267
PUT
DELISTED
Akero Therapeutics
AKRO
| $1.83M | ﹤0.01% |
65,800
+43,900
| +200% | +$1.33M |
|
2268
CALL
Planet Fitness
PLNT
$4.23B
| $1.83M | ﹤0.01% |
18,500
-19,200
| -51% | -$1.75M |
|
2269
RUM Group Inc
RUM
$1.57B
| $1.83M | ﹤0.01% |
+140,519
| New | +$1,000K |
|
2270
PUT
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$263M
| $1.83M | ﹤0.01% |
16,000
+6,500
| +68% | +$422K |
|
|
ITOS
2271
CALL
DELISTED
iTeos Therapeutics
ITOS
| $1.83M | ﹤0.01% |
238,000
-36,200
| -13% | -$311K |
|
|
PR
2272
PUT
Permian Resources
PR
$17.9B
| $1.83M | ﹤0.01% |
134,500
+8,500
| +7% | +$123K |
|
2273
CALL
Veralto
VLTO
$22.6B
| $1.83M | ﹤0.01% |
87,900
+5,200
| +6% | +$554K |
|
2274
Kinross Gold
KGC
$28.5B
| $1.82M | ﹤0.01% |
196,671
-87,167
| -31% | -$859K |
|
2275
Navios Maritime Partners
NMM
$2.25B
| $1.82M | ﹤0.01% |
42,127
+1,756
| +4% | +$91.8K |
|
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.