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 | |
|---|---|---|---|---|---|---|
|
ZUO
4651
CALL
DELISTED
Zuora, Inc.
ZUO
| $152K | ﹤0.01% |
15,400
-13,900
| -47% | -$116K |
|
|
RUTH
4652
PUT
DELISTED
Ruth's Hospitality Group, Inc.
RUTH
| $152K | ﹤0.01% |
9,300
+5,900
| +174% | +$102K |
|
|
EB
4653
CALL
DELISTED
Eventbrite
EB
| $151K | ﹤0.01% |
17,700
+17,200
| +3,440% | +$142K |
|
|
ESPR
4654
DELISTED
Esperion Therapeutics
ESPR
| $151K | ﹤0.01% |
95,594
-43,833
| -31% | -$226K |
|
4655
Exelixis
EXEL
$13.9B
| $151K | ﹤0.01% |
+7,792
| New | +$136K |
|
4656
PUT
Global Partners
GLP
$1.65B
| $151K | ﹤0.01% |
4,900
| – | – |
|
4657
Greenlight Captial
GLRE
$579M
| $151K | ﹤0.01% |
16,154
+12,736
| +373% | +$120K |
|
4658
CALL
Goldman Sachs BDC
GSBD
$997M
| $151K | ﹤0.01% |
11,100
+1,200
| +12% | +$17.9K |
|
4659
PUT
Leslie's
LESL
$8.33M
| $151K | ﹤0.01% |
690
+625
| +962% | +$162K |
|
4660
PUT
La-Z-Boy
LZB
$1.64B
| $151K | ﹤0.01% |
5,200
+3,900
| +300% | +$111K |
|
4661
PUT
Ryder
R
$9.9B
| $151K | ﹤0.01% |
1,700
+400
| +31% | +$36.8K |
|
4662
CALL
Tootsie Roll Industries
TR
$2.97B
| $151K | ﹤0.01% |
3,691
+1,102
| +43% | +$43.9K |
|
4663
PUT
Advanced Drainage Systems
WMS
$10.6B
| $151K | ﹤0.01% |
1,800
+500
| +38% | +$44K |
|
4664
CALL
Adecoagro
AGRO
$1.4B
| $150K | ﹤0.01% |
18,600
+4,800
| +35% | +$38.6K |
|
4665
PUT
Lennox International
LII
$15B
| $150K | ﹤0.01% |
+600
| New | +$151K |
|
|
MRUS
4666
CALL
DELISTED
Merus
MRUS
| $150K | ﹤0.01% |
8,200
+7,200
| +720% | +$125K |
|
|
NOTV
4667
PUT
DELISTED
Inotiv
NOTV
| $150K | ﹤0.01% |
34,700
-109,100
| -76% | -$695K |
|
4668
CALL
Navitas Semiconductor
NVTS
$2.54B
| $150K | ﹤0.01% |
20,600
+17,600
| +587% | +$98.7K |
|
|
DCP
4669
PUT
DELISTED
DCP Midstream, LP
DCP
| $150K | ﹤0.01% |
3,600
-186,000
| -98% | -$7.75M |
|
4670
CALL
AMC Global Media
AMCX
$450M
| $149K | ﹤0.01% |
8,500
+900
| +12% | +$16.8K |
|
4671
PUT
Asure Software
ASUR
$242M
| $149K | ﹤0.01% |
+10,300
| New | +$122K |
|
4672
Cars.com
CARS
$722M
| $149K | ﹤0.01% |
+7,749
| New | +$132K |
|
4673
Golar LNG
GLNG
$4.82B
| $149K | ﹤0.01% |
6,936
-17,411
| -72% | -$390K |
|
4674
PUT
Intrepid Potash
IPI
$476M
| $149K | ﹤0.01% |
5,400
-128,700
| -96% | -$3.92M |
|
4675
Direxion Daily S&P Biotech Bear 3X ETF
LABD
$70.3M
| $149K | ﹤0.01% |
+728
| New | +$124K |
|
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.