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 | |
|---|---|---|---|---|---|---|
|
CIM
3826
CALL
Chimera Investment
CIM
$1.06B
| $304K | ﹤0.01% |
18,000
-18,767
| -51% | -$359K |
|
3827
PUT
WPP
WPP
$4.59B
| $303K | ﹤0.01% |
+5,100
| New | +$299K |
|
3828
PUT
BioXcel Therapeutics
BTAI
$26.1M
| $302K | ﹤0.01% |
1,013
+994
| +5,232% | +$424K |
|
|
CYBR
3829
DELISTED
CyberArk
CYBR
| $302K | ﹤0.01% |
2,043
-1,040
| -34% | -$145K |
|
3830
CALL
Encompass Health
EHC
$11.5B
| $302K | ﹤0.01% |
5,600
+5,200
| +1,300% | +$303K |
|
3831
Oppenheimer Holdings
OPY
$1.2B
| $302K | ﹤0.01% |
+7,726
| New | +$340K |
|
3832
PUT
Sportradar
SRAD
$4.38B
| $302K | ﹤0.01% |
26,000
+19,800
| +319% | +$230K |
|
3833
PUT
TH International
THCH
$52.5M
| $302K | ﹤0.01% |
14,880
+9,440
| +174% | +$190K |
|
|
ALTU
3834
PUT
DELISTED
Altitude Acquisition Corp
ALTU
| $302K | ﹤0.01% |
29,700
-8,700
| -23% | -$87.4K |
|
3835
CALL
Andersons Inc
ANDE
$2.49B
| $301K | ﹤0.01% |
7,300
+5,900
| +421% | +$233K |
|
3836
PUT
Editas Medicine
EDIT
$402M
| $301K | ﹤0.01% |
41,600
+20,100
| +93% | +$179K |
|
3837
CALL
Fidus Investment
FDUS
$766M
| $301K | ﹤0.01% |
15,800
+12,100
| +327% | +$241K |
|
3838
Vail Resorts
MTN
$5.6B
| $301K | ﹤0.01% |
+1,289
| New | +$311K |
|
3839
PUT
TaskUs
TASK
$568M
| $301K | ﹤0.01% |
20,900
+3,900
| +23% | +$67.9K |
|
3840
Bain Capital Specialty
BCSF
$833M
| $300K | ﹤0.01% |
25,222
-31,266
| -55% | -$400K |
|
3841
Herbalife
HLF
$1.3B
| $300K | ﹤0.01% |
18,644
+18,544
| +18,544% | +$328K |
|
3842
CALL
Exponent
EXPO
$3.15B
| $299K | ﹤0.01% |
3,000
+200
| +7% | +$20.4K |
|
3843
CALL
Helix Energy Solutions
HLX
$1.35B
| $299K | ﹤0.01% |
38,700
+29,800
| +335% | +$233K |
|
3844
CALL
Liberty Global Class C
LBTYK
$3.4B
| $299K | ﹤0.01% |
15,300
+11,900
| +350% | +$251K |
|
3845
CALL
Sportsman's Warehouse
SPWH
$45.7M
| $299K | ﹤0.01% |
35,300
+15,200
| +76% | +$139K |
|
3846
CALL
CGI
GIB
$15B
| $298K | ﹤0.01% |
3,100
-100
| -3% | -$8.99K |
|
3847
CALL
Idaho Strategic Resources
IDR
$456M
| $298K | ﹤0.01% |
61,200
+4,800
| +9% | +$25.7K |
|
3848
CALL
IonQ
IONQ
$12.6B
| $298K | ﹤0.01% |
48,500
-42,400
| -47% | -$198K |
|
3849
CALL
TFI International
TFII
$12.1B
| $298K | ﹤0.01% |
2,500
+1,700
| +213% | +$198K |
|
3850
Interactive Brokers
IBKR
$40.5B
| $297K | ﹤0.01% |
14,400
-9,836
| -41% | -$200K |
|
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.