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 | |
|---|---|---|---|---|---|---|
976
PUT
Revolve Group
RVLV
$1.75B
| $8.68M | 0.01% |
330,200
+313,500
| +1,877% | +$8.09M |
|
977
PUT
Agilent Technologies
A
$39.5B
| $8.67M | 0.01% |
62,700
+32,700
| +109% | +$4.78M |
|
978
Fidelity National Information Services
FIS
$20.7B
| $8.67M | 0.01% |
+159,516
| New | +$10.4M |
|
979
CALL
Citizens Financial Group
CFG
$30.3B
| $8.62M | 0.01% |
283,900
+99,600
| +54% | +$3.9M |
|
980
CALL
Bunge Global
BG
$23.7B
| $8.58M | 0.01% |
89,800
+33,200
| +59% | +$3.23M |
|
|
RETA
981
CALL
DELISTED
Reata Pharmaceuticals, Inc. Class A Common Stock
RETA
| $8.57M | 0.01% |
94,300
+81,700
| +648% | +$4.79M |
|
982
PUT
Sysco
SYY
$39.1B
| $8.57M | 0.01% |
111,000
+61,600
| +125% | +$4.73M |
|
983
PUT
Otis Worldwide
OTIS
$27.2B
| $8.55M | 0.01% |
101,300
+79,700
| +369% | +$6.6M |
|
984
CALL
HubSpot
HUBS
$9.73B
| $8.53M | 0.01% |
19,900
-6,600
| -25% | -$2.41M |
|
|
EXAS
985
CALL
DELISTED
Exact Sciences
EXAS
| $8.52M | 0.01% |
125,700
-137,600
| -52% | -$8.84M |
|
986
CALL
Regions Financial
RF
$26.2B
| $8.5M | 0.01% |
458,200
+335,300
| +273% | +$7.3M |
|
|
PACW
987
CALL
DELISTED
PacWest Bancorp
PACW
| $8.5M | 0.01% |
873,600
+862,100
| +7,497% | +$19.2M |
|
988
PUT
Dolby
DLB
$4.65B
| $8.49M | 0.01% |
99,400
+83,700
| +533% | +$6.76M |
|
989
PUT
Sony
SONY
$122B
| $8.46M | 0.01% |
466,500
-53,500
| -10% | -$927K |
|
990
PUT
Toronto Dominion Bank
TD
$197B
| $8.42M | 0.01% |
140,600
-90,600
| -39% | -$5.85M |
|
991
CALL
Martin Marietta Materials
MLM
$32.8B
| $8.41M | 0.01% |
23,700
+20,800
| +717% | +$7.3M |
|
992
PUT
Wolfspeed
WOLF
$1.35B
| $8.37M | 0.01% |
128,900
-29,400
| -19% | -$2.15M |
|
993
PUT
Suncor Energy
SU
$78.4B
| $8.37M | 0.01% |
269,600
-235,900
| -47% | -$7.67M |
|
994
PUT
JB Hunt Transport Services
JBHT
$27.2B
| $8.35M | 0.01% |
47,600
+15,800
| +50% | +$2.87M |
|
995
PUT
Kohl's
KSS
$2.06B
| $8.31M | 0.01% |
353,000
-44,600
| -11% | -$1.26M |
|
|
SGEN
996
CALL
DELISTED
Seagen Inc. Common Stock
SGEN
| $8.3M | 0.01% |
41,000
+25,800
| +170% | +$4.14M |
|
997
CALL
Flex
FLEX
$46.9B
| $8.28M | 0.01% |
477,720
-194,140
| -29% | -$3.36M |
|
998
CALL
Chord Energy
CHRD
$7.82B
| $8.2M | 0.01% |
60,900
+30,400
| +100% | +$4.13M |
|
999
CALL
Viking Therapeutics
VKTX
$4.11B
| $8.2M | 0.01% |
492,200
+306,800
| +165% | +$3.17M |
|
1000
CALL
UBS Group
UBS
$169B
| $8.18M | 0.01% |
383,400
+12,400
| +3% | +$259K |
|
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.