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 | |
|---|---|---|---|---|---|---|
|
AMRS
3501
PUT
DELISTED
Amyris Inc.
AMRS
| $403K | ﹤0.01% |
296,800
+90,700
| +44% | +$130K |
|
|
HUYA
3502
CALL
Huya Inc
HUYA
$558M
| $401K | ﹤0.01% |
111,300
+4,400
| +4% | +$20.7K |
|
3503
PUT
Tidewater
TDW
$3.91B
| $401K | ﹤0.01% |
9,100
+8,300
| +1,038% | +$357K |
|
3504
monday.com
MNDY
$3.47B
| $400K | ﹤0.01% |
+2,806
| New | +$379K |
|
3505
PUT
New Fortress Energy
NFE
$96.4M
| $400K | ﹤0.01% |
13,600
-71,000
| -84% | -$2.5M |
|
3506
CALL
Sabra Healthcare REIT
SBRA
$5.65B
| $400K | ﹤0.01% |
34,800
+7,700
| +28% | +$95.3K |
|
3507
CALL
INNOVATE Corp
VATE
$116M
| $400K | ﹤0.01% |
13,470
+13,050
| +3,107% | +$381K |
|
3508
Aspen Aerogels
ASPN
$385M
| $399K | ﹤0.01% |
53,586
+36,667
| +217% | +$364K |
|
3509
CALL
Pulmonx
LUNG
$51.5M
| $399K | ﹤0.01% |
+35,700
| New | +$352K |
|
3510
Costamare
CMRE
$1.89B
| $398K | ﹤0.01% |
42,356
-30,749
| -42% | -$303K |
|
3511
CALL
Equitable Holdings
EQH
$13.3B
| $398K | ﹤0.01% |
15,700
-44,800
| -74% | -$1.32M |
|
|
RWT
3512
CALL
Redwood Trust
RWT
$619M
| $398K | ﹤0.01% |
59,100
-609,100
| -91% | -$4.56M |
|
3513
CALL
Beyond Air
XAIR
$3.87M
| $398K | ﹤0.01% |
148
+62
| +72% | +$158K |
|
|
ACLX
3514
PUT
DELISTED
Arcellx
ACLX
| $397K | ﹤0.01% |
12,900
+12,500
| +3,125% | +$379K |
|
3515
CALL
Copa Holdings
CPA
$5.65B
| $397K | ﹤0.01% |
4,300
+4,100
| +2,050% | +$372K |
|
3516
CALL
Gevo
GEVO
$380M
| $397K | ﹤0.01% |
258,000
-295,600
| -53% | -$560K |
|
3517
Opendoor
OPEN
$3.71B
| $397K | ﹤0.01% |
233,623
+221,016
| +1,753% | +$364K |
|
3518
Star Bulk Carriers
SBLK
$3.02B
| $396K | ﹤0.01% |
+18,783
| New | +$411K |
|
|
CVAC
3519
CALL
DELISTED
CureVac
CVAC
| $395K | ﹤0.01% |
56,800
+38,700
| +214% | +$337K |
|
3520
CALL
Hims & Hers Health
HIMS
$7B
| $395K | ﹤0.01% |
39,900
-87,800
| -69% | -$769K |
|
|
ACCD
3521
DELISTED
Accolade Inc
ACCD
| $395K | ﹤0.01% |
27,538
+13,416
| +95% | +$152K |
|
|
CANO
3522
CALL
DELISTED
Cano Health, Inc.
CANO
| $395K | ﹤0.01% |
4,347
-2,775
| -39% | -$377K |
|
3523
CALL
BRC Group Holdings
RILY
$273M
| $394K | ﹤0.01% |
13,900
+2,900
| +26% | +$110K |
|
3524
CALL
Vroom Inc
VRM
$37.5M
| $393K | ﹤0.01% |
5,475
-6,531
| -54% | -$528K |
|
3525
PUT
Wyndham Hotels & Resorts
WH
$5.58B
| $393K | ﹤0.01% |
5,800
+5,100
| +729% | +$376K |
|
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.