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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2051
PUT
Lumentum
LITE
$59.4B
| $1.77M | ﹤0.01% |
32,700
+11,800
| +56% | +$658K |
|
2052
PUT
Kornit Digital
KRNT
$706M
| $1.76M | ﹤0.01% |
91,200
-30,300
| -25% | -$684K |
|
2053
CALL
Exelixis
EXEL
$13.9B
| $1.76M | ﹤0.01% |
90,900
-55,000
| -38% | -$958K |
|
2054
PUT
Chefs' Warehouse
CHEF
$3.87B
| $1.76M | ﹤0.01% |
51,700
+48,600
| +1,568% | +$1.71M |
|
2055
CALL
Portillo's
PTLO
$315M
| $1.76M | ﹤0.01% |
82,400
+47,000
| +133% | +$987K |
|
2056
CALL
Alkermes
ALKS
$8.82B
| $1.76M | ﹤0.01% |
62,400
+27,800
| +80% | +$757K |
|
|
HZNP
2057
CALL
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $1.76M | ﹤0.01% |
16,100
-128,500
| -89% | -$14.2M |
|
2058
CALL
Allison Transmission
ALSN
$10.1B
| $1.75M | ﹤0.01% |
38,800
+2,200
| +6% | +$98.8K |
|
2059
PUT
Chemours
CC
$2.59B
| $1.75M | ﹤0.01% |
58,300
-11,000
| -16% | -$362K |
|
2060
PUT
LGI Homes
LGIH
$1.4B
| $1.74M | ﹤0.01% |
15,300
+14,400
| +1,600% | +$1.56M |
|
2061
CALL
Deutsche Bank
DB
$66.3B
| $1.74M | ﹤0.01% |
170,700
-206,900
| -55% | -$2.47M |
|
2062
CALL
Tencent Music
TME
$14.5B
| $1.74M | ﹤0.01% |
210,500
-254,200
| -55% | -$2.08M |
|
2063
CALL
Range Resources
RRC
$9.11B
| $1.74M | ﹤0.01% |
65,800
-146,400
| -69% | -$3.69M |
|
2064
PUT
Ericsson
ERIC
$30.7B
| $1.74M | ﹤0.01% |
296,600
-67,400
| -19% | -$384K |
|
2065
CALL
Ollie's Bargain Outlet
OLLI
$4.01B
| $1.73M | ﹤0.01% |
29,800
-117,600
| -80% | -$6.47M |
|
|
DEN
2066
PUT
DELISTED
Denbury Inc.
DEN
| $1.73M | ﹤0.01% |
19,700
+11,000
| +126% | +$925K |
|
2067
CALL
Asbury Automotive
ABG
$4.19B
| $1.72M | ﹤0.01% |
8,200
-10,000
| -55% | -$2.12M |
|
2068
PUT
DTE Energy
DTE
$31.1B
| $1.72M | ﹤0.01% |
15,700
+15,100
| +2,517% | +$1.69M |
|
2069
PUT
First Horizon
FHN
$12.1B
| $1.72M | ﹤0.01% |
96,700
-35,200
| -27% | -$782K |
|
2070
CALL
Amplify Junior Silver Miners ETF
SILJ
$3.27B
| $1.72M | ﹤0.01% |
136,600
-393,500
| -74% | -$4.16M |
|
2071
CALL
Kyndryl
KD
$2.66B
| $1.72M | ﹤0.01% |
116,400
+89,700
| +336% | +$1.27M |
|
2072
PUT
Beam Therapeutics
BEAM
$2.58B
| $1.72M | ﹤0.01% |
56,100
+38,000
| +210% | +$1.5M |
|
2073
PUT
Gold Fields
GFI
$29.2B
| $1.72M | ﹤0.01% |
128,800
-13,700
| -10% | -$153K |
|
2074
PUT
Vipshop
VIPS
$6.84B
| $1.71M | ﹤0.01% |
112,900
+85,000
| +305% | +$1.26M |
|
2075
CALL
Ternium
TX
$9.29B
| $1.71M | ﹤0.01% |
41,500
+35,800
| +628% | +$1.41M |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.