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 | |
|---|---|---|---|---|---|---|
|
BPMC
2076
CALL
DELISTED
Blueprint Medicines
BPMC
| $2.29M | ﹤0.01% |
26,200
-3,100
| -11% | -$284K |
|
2077
CALL
Finance of America Companies
FOA
$204M
| $2.28M | ﹤0.01% |
+81,200
| New | +$1.45M |
|
2078
CALL
Performance Food Group
PFGC
$17.5B
| $2.28M | ﹤0.01% |
27,000
+5,000
| +23% | +$422K |
|
2079
PUT
IQVIA
IQV
$34.7B
| $2.28M | ﹤0.01% |
11,600
+3,000
| +35% | +$633K |
|
2080
PUT
InMode
INMD
$872M
| $2.27M | ﹤0.01% |
136,100
-70,300
| -34% | -$1.25M |
|
|
GTLS
2081
DELISTED
Chart Industries
GTLS
| $2.27M | ﹤0.01% |
11,890
+7,541
| +173% | +$1.21M |
|
|
TEM
2082
CALL
Tempus AI
TEM
$7.69B
| $2.27M | ﹤0.01% |
67,200
+47,500
| +241% | +$2.35M |
|
2083
ProShares Short VIX Short-Term Futures ETF
SVXY
$220M
| $2.26M | ﹤0.01% |
45,228
+20,039
| +80% | +$1.01M |
|
2084
Rubrik
RBRK
$15.1B
| $2.26M | ﹤0.01% |
+34,641
| New | +$1.71M |
|
|
EMBJ
2085
CALL
Embraer S.A. ADS
EMBJ
$11.6B
| $2.26M | ﹤0.01% |
61,700
-179,400
| -74% | -$6.46M |
|
2086
SharkNinja
SN
$21B
| $2.26M | ﹤0.01% |
23,206
+15,153
| +188% | +$1.55M |
|
2087
Caesars Entertainment
CZR
$6.1B
| $2.26M | ﹤0.01% |
67,544
-21,435
| -24% | -$849K |
|
|
NOVA
2088
CALL
DELISTED
Sunnova Energy
NOVA
| $2.26M | ﹤0.01% |
658,100
+355,800
| +118% | +$1.78M |
|
2089
CALL
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $2.26M | ﹤0.01% |
47,200
+8,200
| +21% | +$332K |
|
2090
CALL
Baxter International
BAX
$11.6B
| $2.26M | ﹤0.01% |
77,400
-142,500
| -65% | -$4.8M |
|
2091
PUT
Hormel Foods
HRL
$13.9B
| $2.24M | ﹤0.01% |
71,400
-14,800
| -17% | -$464K |
|
2092
CALL
Omega Healthcare
OHI
$15.4B
| $2.24M | ﹤0.01% |
59,100
+15,000
| +34% | +$599K |
|
2093
PUT
CVR Partners
UAN
$1.3B
| $2.23M | ﹤0.01% |
29,400
+1,000
| +4% | +$72.4K |
|
2094
CALL
Hartford Financial Services
HIG
$38.5B
| $2.23M | ﹤0.01% |
20,400
-15,800
| -44% | -$1.83M |
|
2095
CALL
Illinois Tool Works
ITW
$81.4B
| $2.23M | ﹤0.01% |
8,800
-1,500
| -15% | -$398K |
|
2096
Regeneron Pharmaceuticals
REGN
$68.8B
| $2.23M | ﹤0.01% |
3,131
-618
| -16% | -$519K |
|
2097
CALL
Rockwell Automation
ROK
$51.4B
| $2.23M | ﹤0.01% |
7,800
-1,800
| -19% | -$506K |
|
2098
CALL
Lear
LEA
$7.19B
| $2.23M | ﹤0.01% |
23,500
-1,200
| -5% | -$120K |
|
2099
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$712M
| $2.22M | ﹤0.01% |
46,100
-3,100
| -6% | -$129K |
|
2100
PUT
Leidos
LDOS
$14.1B
| $2.22M | ﹤0.01% |
15,400
+6,500
| +73% | +$1.08M |
|
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.