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 | |
|---|---|---|---|---|---|---|
2726
The GEO Group
GEO
$4.13B
| $1.12M | ﹤0.01% |
+40,049
| New | +$888K |
|
2727
PUT
iQIYI
IQ
$1.18B
| $1.12M | ﹤0.01% |
557,600
+88,700
| +19% | +$210K |
|
2728
Beyond Meat
BYND
$288M
| $1.12M | ﹤0.01% |
297,844
+236,382
| +385% | +$1.26M |
|
2729
Clearwater Paper
CLW
$271M
| $1.12M | ﹤0.01% |
37,536
+34,695
| +1,221% | +$941K |
|
|
AIOT
2730
CALL
PowerFleet Inc
AIOT
$500M
| $1.12M | ﹤0.01% |
167,800
+121,300
| +261% | +$728K |
|
|
FFAI
2731
PUT
Faraday Future Intelligent Electric
FFAI
$15.8M
| $1.12M | ﹤0.01% |
3,067
+1,591
| +108% | +$422K |
|
2732
CALL
EPR Properties
EPR
$4.86B
| $1.11M | ﹤0.01% |
25,200
+7,900
| +46% | +$362K |
|
2733
TripAdvisor
TRIP
$1.59B
| $1.11M | ﹤0.01% |
75,515
+31,782
| +73% | +$464K |
|
|
CALY
2734
CALL
Callaway Golf Company
CALY
$3.26B
| $1.11M | ﹤0.01% |
141,700
-9,300
| -6% | -$84.5K |
|
2735
PUT
J.M. Smucker
SJM
$12.6B
| $1.11M | ﹤0.01% |
10,100
-112,200
| -92% | -$12.9M |
|
2736
Hawaiian Electric Industries
HE
$2.33B
| $1.11M | ﹤0.01% |
114,249
-94,965
| -45% | -$960K |
|
2737
PUT
Protagonist Therapeutics
PTGX
$8.75B
| $1.11M | ﹤0.01% |
28,800
+28,600
| +14,300% | +$1.25M |
|
2738
CALL
KB Financial Group
KB
$41.2B
| $1.11M | ﹤0.01% |
19,500
+13,500
| +225% | +$872K |
|
2739
PUT
W.P. Carey
WPC
$17.1B
| $1.11M | ﹤0.01% |
24,400
-28,700
| -54% | -$1.64M |
|
2740
CALL
Coeur Mining
CDE
$15.6B
| $1.11M | ﹤0.01% |
193,400
+43,800
| +29% | +$284K |
|
2741
PUT
HDFC Bank
HDB
$119B
| $1.1M | ﹤0.01% |
34,600
-83,000
| -71% | -$2.65M |
|
|
PARA
2742
DELISTED
Paramount Global Class B
PARA
| $1.1M | ﹤0.01% |
105,614
-239,278
| -69% | -$2.57M |
|
2743
Transocean
RIG
$5.92B
| $1.1M | ﹤0.01% |
294,560
-1,216,407
| -81% | -$5.05M |
|
2744
Rockwell Automation
ROK
$51.4B
| $1.1M | ﹤0.01% |
3,865
+583
| +18% | +$164K |
|
2745
PUT
Mettler-Toledo International
MTD
$26.8B
| $1.1M | ﹤0.01% |
900
+100
| +13% | +$130K |
|
2746
CALL
Camping World
CWH
$363M
| $1.1M | ﹤0.01% |
52,100
-28,500
| -35% | -$650K |
|
2747
CALL
Gevo
GEVO
$397M
| $1.09M | ﹤0.01% |
523,600
+454,700
| +660% | +$862K |
|
|
2748
Microsoft
MSFT
$2.84T
| $1.09M | ﹤0.01% |
2,596
-96,144
| -97% | -$41M |
|
2749
CALL
Neurocrine Biosciences
NBIX
$17.7B
| $1.09M | ﹤0.01% |
8,000
-19,900
| -71% | -$2.46M |
|
2750
PUT
Allegiant Air
ALGT
$2.64B
| $1.09M | ﹤0.01% |
11,600
+400
| +4% | +$29.2K |
|
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.