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 | |
|---|---|---|---|---|---|---|
4326
CALL
Citius Pharmaceuticals
CTXR
$14M
| $198K | ﹤0.01% |
6,776
-5,200
| -43% | -$150K |
|
4327
CALL
Jefferies Financial Group
JEF
$13B
| $198K | ﹤0.01% |
7,900
+1,519
| +24% | +$54.9K |
|
4328
PUT
LSB Industries
LXU
$837M
| $198K | ﹤0.01% |
19,200
+14,500
| +309% | +$177K |
|
|
SAND
4329
PUT
DELISTED
Sandstorm Gold
SAND
| $198K | ﹤0.01% |
34,100
+11,000
| +48% | +$60.2K |
|
4330
CALL
Sibanye-Stillwater
SBSW
$6.02B
| $198K | ﹤0.01% |
23,800
-55,500
| -70% | -$538K |
|
4331
PUT
Bentley Systems
BSY
$11.2B
| $197K | ﹤0.01% |
4,600
-19,300
| -81% | -$767K |
|
4332
Citi Trends
CTRN
$561M
| $197K | ﹤0.01% |
+10,398
| New | +$286K |
|
4333
Invesco DB Energy Fund
DBE
$89.8M
| $197K | ﹤0.01% |
9,630
-1,100
| -10% | -$23.3K |
|
4334
PUT
Ribbon Communications
RBBN
$382M
| $197K | ﹤0.01% |
+57,700
| New | +$211K |
|
4335
PUT
Beyond Air
XAIR
$3.88M
| $197K | ﹤0.01% |
73
+10
| +16% | +$25.6K |
|
4336
PUT
Eve Holding
EVEX
$843M
| $196K | ﹤0.01% |
27,100
+4,000
| +17% | +$26.3K |
|
|
GES
4337
PUT
DELISTED
Guess Inc
GES
| $196K | ﹤0.01% |
10,100
-19,000
| -65% | -$408K |
|
4338
CALL
PLAYSTUDIOS Inc
MYPS
$78.4M
| $196K | ﹤0.01% |
53,200
-33,600
| -39% | -$136K |
|
|
TTM.RT
4339
PUT
DELISTED
TATA MOTORS LIMITED RT PUR ADR
TTM.RT
| $196K | ﹤0.01% |
28,400
-95,700
| -77% | -$660K |
|
|
4340
PUT
Citi Trends
CTRN
$561M
| $195K | ﹤0.01% |
10,300
+6,600
| +178% | +$181K |
|
|
DOO
4341
PUT
Bombardier Recreational Products
DOO
$4.52B
| $195K | ﹤0.01% |
2,500
+1,800
| +257% | +$148K |
|
4342
PUT
Equitable Holdings
EQH
$13.4B
| $195K | ﹤0.01% |
7,700
+4,000
| +108% | +$118K |
|
4343
PUT
Kimco Realty
KIM
$17.7B
| $195K | ﹤0.01% |
10,000
| – | – |
|
4344
Planet Labs
PL
$7.28B
| $195K | ﹤0.01% |
49,632
+24,739
| +99% | +$111K |
|
4345
CALL
Thomson Reuters
TRI
$45.3B
| $195K | ﹤0.01% |
1,424
+1,139
| +400% | +$145K |
|
4346
PUT
CDW
CDW
$18.8B
| $194K | ﹤0.01% |
1,000
-1,200
| -55% | -$236K |
|
4347
CALL
CleanSpark
CLSK
$3.29B
| $194K | ﹤0.01% |
69,800
-146,400
| -68% | -$402K |
|
4348
PUT
Eagle Bancorp
EGBN
$870M
| $194K | ﹤0.01% |
5,800
+5,700
| +5,700% | +$244K |
|
4349
PUT
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.91B
| $194K | ﹤0.01% |
6,800
-4,700
| -41% | -$149K |
|
4350
PUT
Hims & Hers Health
HIMS
$6.6B
| $194K | ﹤0.01% |
19,600
+7,800
| +66% | +$68.4K |
|
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.