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 | |
|---|---|---|---|---|---|---|
4101
CALL
Getty Images
GETY
$171M
| $243K | ﹤0.01% |
47,800
+1,000
| +2% | +$5.55K |
|
4102
CALL
Griffon
GFF
$4.29B
| $243K | ﹤0.01% |
7,600
-62,600
| -89% | -$2.29M |
|
|
MITT
4103
PUT
TPG Mortgage Investment Trust
MITT
$230M
| $243K | ﹤0.01% |
42,400
-1,200
| -3% | -$7.26K |
|
4104
CALL
Cogent Communications
CCOI
$649M
| $242K | ﹤0.01% |
3,800
+3,700
| +3,700% | +$238K |
|
4105
PUT
CVRx
CVRX
$131M
| $242K | ﹤0.01% |
26,000
+25,900
| +25,900% | +$343K |
|
4106
Sprinklr
CXM
$1.48B
| $242K | ﹤0.01% |
18,721
+11,139
| +147% | +$113K |
|
4107
PUT
PennantPark Floating Rate Capital
PFLT
$705M
| $242K | ﹤0.01% |
22,900
+20,200
| +748% | +$221K |
|
|
JBGS
4108
JBG SMITH
JBGS
$837M
| $241K | ﹤0.01% |
16,037
+4,020
| +33% | +$71.3K |
|
4109
CALL
Everspin Technologies
MRAM
$328M
| $241K | ﹤0.01% |
35,500
-28,800
| -45% | -$192K |
|
4110
PUT
AbCellera Biologics
ABCL
$1.62B
| $240K | ﹤0.01% |
31,900
-90,000
| -74% | -$817K |
|
4111
PUT
Delek US
DK
$3.85B
| $240K | ﹤0.01% |
10,500
-1,800
| -15% | -$45.1K |
|
4112
Mohawk Industries
MHK
$7.14B
| $240K | ﹤0.01% |
2,404
+136
| +6% | +$14.8K |
|
|
CERE
4113
DELISTED
Cerevel Therapeutics Holdings, Inc. Common Stock
CERE
| $240K | ﹤0.01% |
+9,848
| New | +$289K |
|
|
APRN
4114
PUT
DELISTED
Blue Apron Holdings, Inc. Class A Common Stock
APRN
| $240K | ﹤0.01% |
29,625
+28,075
| +1,811% | +$308K |
|
4115
Aaon
AAON
$7.68B
| $239K | ﹤0.01% |
3,719
+2,864
| +335% | +$157K |
|
4116
PUT
Federal Agricultural Mortgage Class A
AGM.A
$1.62B
| $239K | ﹤0.01% |
+1,800
| New | +$202K |
|
|
CGC
4117
Canopy Growth
CGC
$377M
| $239K | ﹤0.01% |
13,708
+13,399
| +4,336% | +$318K |
|
4118
iShares Russell 3000 ETF
IWV
$19.5B
| $239K | ﹤0.01% |
1,016
-1,085
| -52% | -$250K |
|
4119
PUT
Grand Canyon Education
LOPE
$3.99B
| $239K | ﹤0.01% |
+2,100
| New | +$236K |
|
4120
M&T Bank
MTB
$36.6B
| $239K | ﹤0.01% |
2,000
-8,759
| -81% | -$1.27M |
|
4121
PUT
Atkore
ATKR
$2.62B
| $238K | ﹤0.01% |
1,700
-5,200
| -75% | -$705K |
|
4122
CALL
GoodRx Holdings
GDRX
$1.06B
| $238K | ﹤0.01% |
38,100
-30,200
| -44% | -$168K |
|
4123
CALL
Home BancShares
HOMB
$6.31B
| $238K | ﹤0.01% |
11,000
+900
| +9% | +$20.8K |
|
4124
CALL
Immunocore
IMCR
$1.7B
| $237K | ﹤0.01% |
4,800
+3,600
| +300% | +$202K |
|
4125
PUT
Kontoor Brands
KTB
$4.87B
| $237K | ﹤0.01% |
4,900
+3,500
| +250% | +$166K |
|
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.