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 | |
|---|---|---|---|---|---|---|
2151
PUT
BRC Group Holdings
RILY
$277M
| $2.09M | ﹤0.01% |
455,800
-259,500
| -36% | -$1.35M |
|
2152
Tilray
TLRY
$479M
| $2.09M | ﹤0.01% |
157,368
+8,998
| +6% | +$132K |
|
2153
Schwab US Dividend Equity ETF
SCHD
$102B
| $2.09M | ﹤0.01% |
76,471
+34,420
| +82% | +$978K |
|
2154
PUT
Newell Brands
NWL
$2.16B
| $2.09M | ﹤0.01% |
209,500
+95,000
| +83% | +$862K |
|
2155
CALL
Children's Place
PLCE
$53.6M
| $2.08M | ﹤0.01% |
199,100
+12,300
| +7% | +$161K |
|
2156
PUT
OneMain Financial
OMF
$6.9B
| $2.08M | ﹤0.01% |
39,900
-53,500
| -57% | -$2.77M |
|
2157
CALL
Algoma Steel
ASTL
$455M
| $2.08M | ﹤0.01% |
212,300
+78,200
| +58% | +$807K |
|
2158
CALL
Perrigo
PRGO
$1.4B
| $2.07M | ﹤0.01% |
80,700
-36,800
| -31% | -$967K |
|
2159
PUT
Danaos Corp
DAC
$2.55B
| $2.07M | ﹤0.01% |
25,900
-13,100
| -34% | -$1.08M |
|
|
HOLX
2160
PUT
DELISTED
Hologic
HOLX
| $2.07M | ﹤0.01% |
28,700
+7,800
| +37% | +$609K |
|
2161
CALL
Sprott Junior Uranium Miners ETF
URNJ
$306M
| $2.06M | ﹤0.01% |
52,200
-44,600
| -46% | -$1.01M |
|
|
GTLS
2162
CALL
DELISTED
Chart Industries
GTLS
| $2.06M | ﹤0.01% |
10,800
+5,900
| +120% | +$948K |
|
2163
PUT
Immatics
IMTX
$1.24B
| $2.06M | ﹤0.01% |
290,000
-26,400
| -8% | -$227K |
|
2164
CALL
Corcept Therapeutics
CORT
$10.2B
| $2.06M | ﹤0.01% |
40,900
+16,500
| +68% | +$865K |
|
2165
Cleveland-Cliffs
CLF
$6.81B
| $2.06M | ﹤0.01% |
218,946
+38,610
| +21% | +$465K |
|
2166
PUT
Inspire Medical Systems
INSP
$1.42B
| $2.06M | ﹤0.01% |
11,100
+1,300
| +13% | +$252K |
|
2167
Warby Parker
WRBY
$3.01B
| $2.05M | ﹤0.01% |
84,800
+23,147
| +38% | +$473K |
|
2168
CALL
Stride
LRN
$3.69B
| $2.05M | ﹤0.01% |
19,700
-23,300
| -54% | -$2.22M |
|
2169
CALL
Vermilion Energy
VET
$1.73B
| $2.05M | ﹤0.01% |
217,800
+30,600
| +16% | +$298K |
|
2170
PUT
Delek Logistics
DKL
$3.04B
| $2.04M | ﹤0.01% |
48,400
+43,800
| +952% | +$1.75M |
|
2171
CALL
Camtek
CAMT
$6.9B
| $2.04M | ﹤0.01% |
25,300
-8,200
| -24% | -$645K |
|
2172
Tractor Supply
TSCO
$16.3B
| $2.04M | ﹤0.01% |
+38,489
| New | +$2.17M |
|
2173
PUT
Jefferies Financial Group
JEF
$12.9B
| $2.04M | ﹤0.01% |
26,200
-42,100
| -62% | -$3.03M |
|
2174
CALL
Annaly Capital Management
NLY
$16.9B
| $2.04M | ﹤0.01% |
124,900
+4,200
| +3% | +$82K |
|
|
HCP
2175
PUT
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $2.04M | ﹤0.01% |
59,500
-8,500
| -13% | -$288K |
|
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.