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 | |
|---|---|---|---|---|---|---|
2876
PUT
Warner Music
WMG
$13.8B
| $737K | ﹤0.01% |
22,100
-36,700
| -62% | -$1.24M |
|
|
HIBB
2877
CALL
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $737K | ﹤0.01% |
12,500
-100
| -0.8% | -$6.71K |
|
2878
Deckers Outdoor
DECK
$13.3B
| $736K | ﹤0.01% |
+9,828
| New | +$687K |
|
2879
PUT
Fiverr
FVRR
$376M
| $736K | ﹤0.01% |
21,100
+5,500
| +35% | +$201K |
|
2880
CALL
ONE Gas
OGS
$5.05B
| $736K | ﹤0.01% |
9,300
+2,800
| +43% | +$222K |
|
2881
PUT
Pinnacle West Capital
PNW
$12.9B
| $736K | ﹤0.01% |
9,300
-17,600
| -65% | -$1.33M |
|
2882
CALL
Roundhill Ball Metaverse ETF
METV
$210M
| $735K | ﹤0.01% |
76,200
-4,500
| -6% | -$38.4K |
|
2883
Teucrium Wheat Fund
WEAT
$314M
| $734K | ﹤0.01% |
20,813
-1,075
| -5% | -$39.7K |
|
2884
PUT
Synaptics
SYNA
$4.41B
| $733K | ﹤0.01% |
+6,600
| New | +$761K |
|
2885
Cullen/Frost Bankers
CFR
$10.3B
| $731K | ﹤0.01% |
6,944
+1,642
| +31% | +$204K |
|
2886
PUT
Cimpress
CMPR
$2.37B
| $731K | ﹤0.01% |
16,700
+16,200
| +3,240% | +$553K |
|
|
LENZ
2887
CALL
LENZ Therapeutics
LENZ
$172M
| $731K | ﹤0.01% |
42,657
+33,571
| +369% | +$543K |
|
2888
PUT
SIGA Technologies
SIGA
$223M
| $729K | ﹤0.01% |
126,800
+104,400
| +466% | +$698K |
|
2889
PUT
ACM Research
ACMR
$5.83B
| $728K | ﹤0.01% |
62,300
+51,200
| +461% | +$592K |
|
2890
Cincinnati Financial
CINF
$28.3B
| $728K | ﹤0.01% |
+6,499
| New | +$739K |
|
|
2891
PUT
Cincinnati Financial
CINF
$28.3B
| $728K | ﹤0.01% |
6,500
+6,100
| +1,525% | +$694K |
|
|
VRN
2892
PUT
DELISTED
Veren
VRN
| $727K | ﹤0.01% |
103,100
-23,400
| -18% | -$162K |
|
|
BZUN
2893
CALL
Baozun
BZUN
$144M
| $726K | ﹤0.01% |
120,700
+75,500
| +167% | +$498K |
|
2894
CALL
Jack in the Box
JACK
$278M
| $726K | ﹤0.01% |
8,300
+7,400
| +822% | +$585K |
|
2895
CALL
Suburban Propane Partners
SPH
$1.23B
| $726K | ﹤0.01% |
47,400
+7,600
| +19% | +$118K |
|
2896
PUT
CoreCivic
CXW
$3.1B
| $725K | ﹤0.01% |
78,900
-107,000
| -58% | -$1.1M |
|
2897
PUT
Transact Technologies
TACT
$51.7M
| $725K | ﹤0.01% |
117,200
+19,800
| +20% | +$137K |
|
2898
PUT
St. Joe Company
JOE
$3.57B
| $724K | ﹤0.01% |
17,400
+13,100
| +305% | +$561K |
|
|
LENZ
2899
PUT
LENZ Therapeutics
LENZ
$172M
| $724K | ﹤0.01% |
42,257
+32,386
| +328% | +$524K |
|
2900
iShares MBS ETF
MBB
$39B
| $723K | ﹤0.01% |
+7,640
| New | +$721K |
|
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.