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 | |
|---|---|---|---|---|---|---|
3801
CALL
Capricor Therapeutics
CAPR
$380M
| $311K | ﹤0.01% |
73,700
-5,300
| -7% | -$22.8K |
|
3802
Western Midstream Partners
WES
$19.4B
| $311K | ﹤0.01% |
11,808
+9,840
| +500% | +$264K |
|
3803
Sysco
SYY
$40.7B
| $310K | ﹤0.01% |
+4,015
| New | +$308K |
|
3804
PUT
Stratasys
SSYS
$690M
| $309K | ﹤0.01% |
18,700
-75,400
| -80% | -$1.06M |
|
3805
Blink Charging
BLNK
$74.1M
| $308K | ﹤0.01% |
35,628
+33,728
| +1,775% | +$356K |
|
3806
PUT
The Greenbrier Companies
GBX
$1.6B
| $308K | ﹤0.01% |
9,600
+8,700
| +967% | +$263K |
|
3807
CALL
SIGA Technologies
SIGA
$240M
| $308K | ﹤0.01% |
53,700
-42,500
| -44% | -$284K |
|
3808
CALL
SkyWater Technology
SKYT
$1.53B
| $308K | ﹤0.01% |
27,100
-2,100
| -7% | -$23.5K |
|
3809
Terex
TEX
$7.84B
| $308K | ﹤0.01% |
+6,375
| New | +$326K |
|
|
TBCH
3810
CALL
Turtle Beach Corp
TBCH
$258M
| $308K | ﹤0.01% |
30,800
-33,600
| -52% | -$285K |
|
|
SP
3811
PUT
DELISTED
SP Plus Corporation
SP
| $308K | ﹤0.01% |
+9,000
| New | +$319K |
|
3812
PUT
IonQ
IONQ
$12.6B
| $307K | ﹤0.01% |
50,000
-41,500
| -45% | -$194K |
|
3813
CALL
Triumph Financial Inc
TFIN
$1.84B
| $307K | ﹤0.01% |
5,300
+5,200
| +5,200% | +$298K |
|
|
DNMR
3814
PUT
DELISTED
Danimer Scientific, Inc.
DNMR
| $307K | ﹤0.01% |
2,228
+1,285
| +136% | +$117K |
|
3815
CALL
Archer Aviation
ACHR
$3.68B
| $306K | ﹤0.01% |
107,100
-19,800
| -16% | -$53.4K |
|
3816
CALL
First Financial Bancorp
FFBC
$3.55B
| $306K | ﹤0.01% |
+14,100
| New | +$339K |
|
3817
CALL
GeoPark
GPRK
$601M
| $306K | ﹤0.01% |
27,000
+24,400
| +938% | +$324K |
|
|
HDSN
3818
PUT
Hudson Technologies
HDSN
$259M
| $306K | ﹤0.01% |
35,100
+25,500
| +266% | +$247K |
|
3819
Hydrofarm Holdings
HYFM
$3.17M
| $306K | ﹤0.01% |
17,710
+16,385
| +1,237% | +$290K |
|
|
NGD
3820
CALL
DELISTED
New Gold Inc
NGD
| $306K | ﹤0.01% |
278,900
-19,800
| -7% | -$20.2K |
|
3821
PUT
Public Service Enterprise Group
PEG
$39.3B
| $306K | ﹤0.01% |
4,900
+2,300
| +88% | +$139K |
|
3822
PUT
Revvity
RVTY
$12.4B
| $306K | ﹤0.01% |
2,300
+700
| +44% | +$92.2K |
|
3823
CALL
TriMas Corp
TRS
$1.44B
| $306K | ﹤0.01% |
+11,000
| New | +$323K |
|
|
GPP
3824
DELISTED
Green Plains Partners LP
GPP
| $306K | ﹤0.01% |
24,110
+20,052
| +494% | +$260K |
|
3825
PUT
Anavex Life Sciences
AVXL
$238M
| $304K | ﹤0.01% |
35,500
-92,800
| -72% | -$926K |
|
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.