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 | |
|---|---|---|---|---|---|---|
4576
PUT
Lifestance Health
LFST
$4.15B
| $161K | ﹤0.01% |
21,800
+16,800
| +336% | +$93.2K |
|
4577
CALL
QuinStreet
QNST
$927M
| $161K | ﹤0.01% |
10,200
+8,900
| +685% | +$141K |
|
4578
CALL
Thryv Holdings
THRY
$184M
| $161K | ﹤0.01% |
7,000
-9,700
| -58% | -$217K |
|
4579
PUT
Essential Utilities
WTRG
$11.5B
| $161K | ﹤0.01% |
3,700
-2,100
| -36% | -$94.7K |
|
|
ALEX
4580
CALL
DELISTED
Alexander & Baldwin
ALEX
| $160K | ﹤0.01% |
8,500
+3,000
| +55% | +$56.9K |
|
4581
PUT
Bakkt Inc
BKKT
$306M
| $160K | ﹤0.01% |
3,728
-1,264
| -25% | -$49.2K |
|
4582
CALL
Chefs' Warehouse
CHEF
$4.31B
| $160K | ﹤0.01% |
4,700
-20,400
| -81% | -$717K |
|
4583
Guidewire Software
GWRE
$13.9B
| $160K | ﹤0.01% |
1,952
+1,498
| +330% | +$109K |
|
4584
Waters Corp
WAT
$37.3B
| $160K | ﹤0.01% |
+518
| New | +$168K |
|
4585
Yelp
YELP
$1.54B
| $160K | ﹤0.01% |
+5,225
| New | +$157K |
|
|
SYNH
4586
PUT
DELISTED
Syneos Health, Inc. Class A Common Stock
SYNH
| $160K | ﹤0.01% |
4,500
+4,300
| +2,150% | +$156K |
|
|
AMRN
4587
CALL
Amarin Corp
AMRN
$297M
| $159K | ﹤0.01% |
5,325
-5,800
| -52% | -$203K |
|
4588
CALL
Century Communities
CCS
$1.98B
| $159K | ﹤0.01% |
2,500
-10,200
| -80% | -$608K |
|
4589
Eagle Bancorp
EGBN
$850M
| $159K | ﹤0.01% |
+4,760
| New | +$203K |
|
4590
PUT
Expensify
EXFY
$174M
| $159K | ﹤0.01% |
19,600
+19,300
| +6,433% | +$172K |
|
4591
CALL
First Financial Bankshares
FFIN
$5.05B
| $159K | ﹤0.01% |
+5,000
| New | +$174K |
|
|
ADAM
4592
Adamas Trust
ADAM
$777M
| $159K | ﹤0.01% |
15,997
+15,272
| +2,106% | +$165K |
|
|
ORC
4593
CALL
Orchid Island Capital
ORC
$1.31B
| $159K | ﹤0.01% |
17,000
-19,700
| -54% | -$222K |
|
4594
CALL
Travere Therapeutics
TVTX
$5.17B
| $159K | ﹤0.01% |
7,100
+4,400
| +163% | +$93.5K |
|
4595
PUT
Utz Brands
UTZ
$1.24B
| $159K | ﹤0.01% |
9,700
| – | – |
|
4596
PUT
Vital Farms
VITL
$586M
| $159K | ﹤0.01% |
10,400
+5,900
| +131% | +$93.4K |
|
4597
CALL
Oil States International
OIS
$466M
| $158K | ﹤0.01% |
19,000
+16,000
| +533% | +$136K |
|
4598
CALL
Redwire
RDW
$1.86B
| $158K | ﹤0.01% |
52,200
-65,300
| -56% | -$193K |
|
4599
SKYX Platforms
SKYX
$143M
| $158K | ﹤0.01% |
45,929
+43,061
| +1,501% | +$142K |
|
4600
CALL
UFP Industries
UFPI
$4.95B
| $158K | ﹤0.01% |
2,000
| – | – |
|
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.