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 | |
|---|---|---|---|---|---|---|
1001
CALL
Madrigal Pharmaceuticals
MDGL
$12.5B
| $10.5M | 0.01% |
34,100
+6,400
| +23% | +$1.8M |
|
1002
Core Scientific
CORZ
$7.62B
| $10.5M | 0.01% |
746,953
+250,503
| +50% | +$3.7M |
|
1003
PUT
Sweetgreen
SG
$718M
| $10.4M | 0.01% |
325,400
+136,400
| +72% | +$5.08M |
|
|
P
1004
PUT
Everpure Inc
P
$25B
| $10.4M | 0.01% |
169,800
+77,000
| +83% | +$4.29M |
|
|
NBIS
1005
PUT
Nebius Group N.V.
NBIS
$56.1B
| $10.4M | 0.01% |
+376,400
| New | +$9.18M |
|
1006
PUT
Bank OZK
OZK
$5.47B
| $10.4M | 0.01% |
233,100
+35,900
| +18% | +$1.64M |
|
1007
CALL
BridgeBio Pharma
BBIO
$16.2B
| $10.4M | 0.01% |
377,800
+136,900
| +57% | +$3.54M |
|
1008
PUT
AngloGold Ashanti
AU
$39.7B
| $10.3M | 0.01% |
448,200
-11,700
| -3% | -$306K |
|
1009
iShares National Muni Bond ETF
MUB
$45B
| $10.3M | 0.01% |
96,654
-4,699
| -5% | -$505K |
|
1010
CALL
International Flavors & Fragrances
IFF
$18.8B
| $10.3M | 0.01% |
121,600
+12,000
| +11% | +$1.13M |
|
|
APLS
1011
CALL
DELISTED
Apellis Pharmaceuticals
APLS
| $10.3M | 0.01% |
321,700
+68,000
| +27% | +$2.04M |
|
1012
PUT
GitLab
GTLB
$5.1B
| $10.3M | 0.01% |
181,900
+28,400
| +19% | +$1.66M |
|
1013
PUT
Intuitive Machines
LUNR
$2.2B
| $10.2M | 0.01% |
564,100
-92,700
| -14% | -$1.03M |
|
|
MSTU
1014
T-Rex 2X Long MSTR Daily Target ETF
MSTU
$339M
| $10.2M | 0.01% |
134,542
+134,510
| +420,344% | +$14.6M |
|
1015
CALL
Chubb
CB
$137B
| $10.2M | 0.01% |
37,000
-32,000
| -46% | -$9.09M |
|
1016
PUT
ProShares UltraShort Health Care
RXD
$3.3M
| $10.2M | 0.01% |
139,450
+20,150
| +17% | +$428K |
|
1017
CALL
Aptiv
APTV
$11.9B
| $10.2M | 0.01% |
168,500
+89,800
| +114% | +$5.5M |
|
1018
PUT
Caesars Entertainment
CZR
$6.09B
| $10.2M | 0.01% |
304,700
-77,100
| -20% | -$3.05M |
|
1019
Chevron
CVX
$387B
| $10.2M | 0.01% |
70,250
+14,085
| +25% | +$2.16M |
|
1020
Iris Energy
IREN
$14.5B
| $10.2M | 0.01% |
1,035,800
-149,523
| -13% | -$1.59M |
|
1021
PUT
DaVita
DVA
$15B
| $10.2M | 0.01% |
68,000
+13,900
| +26% | +$2.18M |
|
1022
PUT
Sunrun
RUN
$2.48B
| $10.2M | 0.01% |
1,098,800
+184,200
| +20% | +$2.29M |
|
1023
VanEck Semiconductor ETF
SMH
$69.8B
| $10.2M | 0.01% |
+41,923
| New | +$10.4M |
|
1024
PUT
Novartis
NVS
$297B
| $10.1M | 0.01% |
116,300
-51,300
| -31% | -$5.47M |
|
1025
PUT
Builders FirstSource
BLDR
$7.59B
| $10.1M | 0.01% |
71,000
-15,700
| -18% | -$2.78M |
|
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.