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 | |
|---|---|---|---|---|---|---|
3226
PUT
Republic Services
RSG
$67B
| $684K | ﹤0.01% |
3,400
-2,200
| -39% | -$456K |
|
3227
PUT
Ambev
ABEV
$47.1B
| $683K | ﹤0.01% |
369,500
+17,200
| +5% | +$38K |
|
3228
Vanguard Long-Term Treasury ETF
VGLT
$10.2B
| $683K | ﹤0.01% |
12,342
+11,187
| +969% | +$648K |
|
3229
CALL
BBVA Argentina
BBAR
$3.88B
| $680K | ﹤0.01% |
35,700
-106,700
| -75% | -$1.62M |
|
3230
CALL
Inspired Entertainment
INSE
$189M
| $680K | ﹤0.01% |
+75,200
| New | +$712K |
|
3231
PUT
Western Midstream Partners
WES
$19.3B
| $680K | ﹤0.01% |
17,700
-6,200
| -26% | -$239K |
|
3232
CALL
Amcor
AMCR
$20.9B
| $679K | ﹤0.01% |
14,440
+6,720
| +87% | +$351K |
|
3233
CALL
Quest Diagnostics
DGX
$25.5B
| $678K | ﹤0.01% |
4,500
-3,600
| -44% | -$560K |
|
3234
PUT
Equinor
EQNR
$92.5B
| $677K | ﹤0.01% |
28,600
-50,600
| -64% | -$1.22M |
|
|
WOW
3235
CALL
DELISTED
WideOpenWest
WOW
| $677K | ﹤0.01% |
136,500
-2,000
| -1% | -$10.2K |
|
3236
PUT
Ferguson
FERG
$45.1B
| $676K | ﹤0.01% |
3,900
-16,300
| -81% | -$3.24M |
|
|
HPP
3237
CALL
Hudson Pacific Properties
HPP
$805M
| $675K | ﹤0.01% |
31,843
-1,286
| -4% | -$35.1K |
|
3238
CALL
Gaming and Leisure Properties
GLPI
$12.9B
| $674K | ﹤0.01% |
14,000
-42,300
| -75% | -$2.12M |
|
3239
CALL
Pinnacle Financial Partners Inc
PNFP
$15.5B
| $674K | ﹤0.01% |
5,900
-8,500
| -59% | -$958K |
|
3240
CALL
LiveRamp
RAMP
$2.3B
| $674K | ﹤0.01% |
22,200
-17,600
| -44% | -$492K |
|
|
FYBR
3241
CALL
DELISTED
Frontier Communications
FYBR
| $673K | ﹤0.01% |
19,400
-114,700
| -86% | -$4.02M |
|
|
MCW
3242
DELISTED
Mister Car Wash
MCW
| $673K | ﹤0.01% |
+92,417
| New | +$675K |
|
3243
PUT
Aecom
ACM
$9.15B
| $672K | ﹤0.01% |
6,300
-15,500
| -71% | -$1.69M |
|
3244
PUT
GDS Holdings
GDS
$6.23B
| $672K | ﹤0.01% |
28,300
-11,800
| -29% | -$249K |
|
3245
CALL
Structure Therapeutics
GPCR
$3.5B
| $672K | ﹤0.01% |
24,800
+16,800
| +210% | +$596K |
|
3246
CALL
Arcus Biosciences
RCUS
$3.54B
| $671K | ﹤0.01% |
45,100
+43,000
| +2,048% | +$702K |
|
3247
CALL
BioCryst Pharmaceuticals
BCRX
$2.48B
| $670K | ﹤0.01% |
89,200
-51,600
| -37% | -$392K |
|
3248
CALL
SkyWater Technology
SKYT
$1.54B
| $670K | ﹤0.01% |
48,600
+35,100
| +260% | +$349K |
|
3249
PUT
Incyte
INCY
$23.9B
| $669K | ﹤0.01% |
9,700
-27,900
| -74% | -$1.99M |
|
3250
CALL
Vulcan Materials
VMC
$36.8B
| $668K | ﹤0.01% |
2,600
-4,200
| -62% | -$1.13M |
|
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.