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 | |
|---|---|---|---|---|---|---|
1926
CALL
Blackstone Secured Lending
BXSL
$5.41B
| $2.07M | ﹤0.01% |
83,100
+73,600
| +775% | +$1.8M |
|
1927
CALL
Roper Technologies
ROP
$36.3B
| $2.07M | ﹤0.01% |
4,700
+1,900
| +68% | +$821K |
|
1928
CALL
PVH
PVH
$3.71B
| $2.07M | ﹤0.01% |
23,200
-27,000
| -54% | -$2.2M |
|
1929
CALL
Abercrombie & Fitch
ANF
$4.17B
| $2.06M | ﹤0.01% |
74,400
-19,600
| -21% | -$546K |
|
|
PR
1930
PUT
Permian Resources
PR
$17.9B
| $2.06M | ﹤0.01% |
196,600
-23,600
| -11% | -$241K |
|
|
WCC
1931
WESCO International
WCC
$16.2B
| $2.06M | ﹤0.01% |
13,357
+11,362
| +570% | +$1.7M |
|
|
CHX
1932
PUT
DELISTED
ChampionX
CHX
| $2.06M | ﹤0.01% |
76,000
+33,900
| +81% | +$1.01M |
|
1933
PUT
Rockwell Automation
ROK
$51.4B
| $2.05M | ﹤0.01% |
7,000
-23,500
| -77% | -$6.68M |
|
1934
CALL
Vertiv
VRT
$112B
| $2.05M | ﹤0.01% |
143,600
+21,900
| +18% | +$322K |
|
1935
CALL
Duolingo
DUOL
$5.7B
| $2.05M | ﹤0.01% |
14,400
+11,400
| +380% | +$1.17M |
|
1936
CALL
East-West Bancorp
EWBC
$17.9B
| $2.05M | ﹤0.01% |
37,000
+30,900
| +507% | +$2.13M |
|
1937
CALL
Jack Henry & Associates
JKHY
$10.7B
| $2.05M | ﹤0.01% |
13,600
+13,500
| +13,500% | +$2.25M |
|
|
SWAV
1938
CALL
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $2.04M | ﹤0.01% |
9,400
-1,700
| -15% | -$331K |
|
1939
Ferrari
RACE
$63.3B
| $2.04M | ﹤0.01% |
+7,519
| New | +$1.92M |
|
1940
CALL
ING
ING
$93.8B
| $2.04M | ﹤0.01% |
171,500
+78,700
| +85% | +$1.04M |
|
1941
CALL
Ryan Specialty Holdings
RYAN
$5.41B
| $2.03M | ﹤0.01% |
50,500
+49,300
| +4,108% | +$2.03M |
|
|
ASRT
1942
CALL
DELISTED
Assertio
ASRT
| $2.03M | ﹤0.01% |
21,213
+12,473
| +143% | +$940K |
|
|
GAP
1943
The Gap Inc
GAP
$6.84B
| $2.03M | ﹤0.01% |
201,844
+152,860
| +312% | +$1.86M |
|
|
CPE
1944
PUT
DELISTED
Callon Petroleum Company
CPE
| $2.02M | ﹤0.01% |
60,500
-44,700
| -42% | -$1.68M |
|
1945
CALL
Atmos Energy
ATO
$29.9B
| $2.02M | ﹤0.01% |
18,000
+8,900
| +98% | +$1.01M |
|
1946
PUT
Huntsman Corp
HUN
$2.24B
| $2.02M | ﹤0.01% |
73,900
-81,800
| -53% | -$2.44M |
|
|
SWN
1947
CALL
DELISTED
Southwestern Energy Company
SWN
| $2.02M | ﹤0.01% |
404,000
+13,800
| +4% | +$73.2K |
|
|
DCP
1948
CALL
DELISTED
DCP Midstream, LP
DCP
| $2.02M | ﹤0.01% |
48,400
+25,400
| +110% | +$1.06M |
|
1949
CALL
Bausch Health
BHC
$1.65B
| $2.02M | ﹤0.01% |
248,800
-1,400
| -0.6% | -$11.2K |
|
1950
Marqeta
MQ
$1.8B
| $2.01M | ﹤0.01% |
110,178
+108,801
| +7,901% | +$2.43M |
|
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.