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 | |
|---|---|---|---|---|---|---|
2076
PUT
Zimmer Biomet
ZBH
$17.7B
| $1.71M | ﹤0.01% |
13,200
+4,400
| +50% | +$552K |
|
|
HOLX
2077
CALL
DELISTED
Hologic
HOLX
| $1.7M | ﹤0.01% |
21,100
-11,900
| -36% | -$958K |
|
2078
PUT
Leonardo DRS
DRS
$12.8B
| $1.7M | ﹤0.01% |
131,200
+34,800
| +36% | +$450K |
|
2079
AerCap
AER
$23.9B
| $1.7M | ﹤0.01% |
+30,195
| New | +$1.81M |
|
2080
CALL
XP
XP
$8.62B
| $1.7M | ﹤0.01% |
143,000
+81,300
| +132% | +$1.16M |
|
2081
CALL
Stem
STEM
$49.2M
| $1.69M | ﹤0.01% |
14,945
-240
| -2% | -$40.7K |
|
2082
CALL
F5
FFIV
$22.1B
| $1.69M | ﹤0.01% |
11,600
-5,100
| -31% | -$736K |
|
|
FLG
2083
Flagstar Bank National Association
FLG
$5.77B
| $1.69M | ﹤0.01% |
62,339
+35,077
| +129% | +$949K |
|
2084
CALL
Target Hospitality
TH
$1.61B
| $1.69M | ﹤0.01% |
128,600
+28,600
| +29% | +$458K |
|
2085
CALL
Eastman Chemical
EMN
$7.8B
| $1.69M | ﹤0.01% |
20,000
+10,800
| +117% | +$928K |
|
2086
PUT
Matador Resources
MTDR
$6.31B
| $1.69M | ﹤0.01% |
35,400
-45,600
| -56% | -$2.56M |
|
2087
CALL
Vulcan Materials
VMC
$36.3B
| $1.68M | ﹤0.01% |
9,800
+4,900
| +100% | +$870K |
|
2088
PUT
Yeti Holdings
YETI
$3.82B
| $1.68M | ﹤0.01% |
42,000
-116,800
| -74% | -$4.82M |
|
2089
CALL
StoneCo
STNE
$2.62B
| $1.68M | ﹤0.01% |
175,900
-93,000
| -35% | -$890K |
|
2090
CALL
Plains GP Holdings
PAGP
$5.23B
| $1.67M | ﹤0.01% |
127,400
+83,200
| +188% | +$1.09M |
|
2091
ReNew
RNW
$2.24B
| $1.67M | ﹤0.01% |
297,343
+61,166
| +26% | +$327K |
|
2092
Consolidated Edison
ED
$41.6B
| $1.67M | ﹤0.01% |
17,422
+3,263
| +23% | +$306K |
|
2093
PUT
Range Resources
RRC
$9.11B
| $1.66M | ﹤0.01% |
62,800
+24,200
| +63% | +$609K |
|
2094
PUT
Camtek
CAMT
$6.9B
| $1.66M | ﹤0.01% |
58,600
-16,500
| -22% | -$440K |
|
2095
CALL
Tidewater
TDW
$3.91B
| $1.66M | ﹤0.01% |
37,700
+31,600
| +518% | +$1.36M |
|
|
HES
2096
DELISTED
Hess
HES
| $1.66M | ﹤0.01% |
+12,547
| New | +$1.75M |
|
2097
JPMorgan Equity Premium Income ETF
JEPI
$45.3B
| $1.66M | ﹤0.01% |
+30,406
| New | +$1.65M |
|
2098
CALL
Comstock Resources
CRK
$3.97B
| $1.66M | ﹤0.01% |
153,800
-161,700
| -51% | -$1.92M |
|
2099
PUT
Valaris
VAL
$5.51B
| $1.66M | ﹤0.01% |
25,500
+21,200
| +493% | +$1.48M |
|
2100
CALL
Alamo Group
ALG
$2.01B
| $1.66M | ﹤0.01% |
+9,000
| New | +$1.48M |
|
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.