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 | |
|---|---|---|---|---|---|---|
2176
CALL
Par Pacific Holdings
PARR
$3.88B
| $1.53M | ﹤0.01% |
52,600
-24,500
| -32% | -$655K |
|
2177
CALL
OneSpan
OSPN
$562M
| $1.53M | ﹤0.01% |
87,700
+87,100
| +14,517% | +$1.3M |
|
2178
Equinox Gold
EQX
$7.32B
| $1.53M | ﹤0.01% |
297,827
+109,351
| +58% | +$455K |
|
|
SBOW
2179
PUT
DELISTED
SilverBow Resources, Inc.
SBOW
| $1.53M | ﹤0.01% |
67,100
+39,200
| +141% | +$968K |
|
2180
PUT
Gogo Inc
GOGO
$515M
| $1.52M | ﹤0.01% |
105,200
+40,800
| +63% | +$636K |
|
2181
PUT
DHT Holdings
DHT
$2.97B
| $1.52M | ﹤0.01% |
140,700
+3,700
| +3% | +$37.2K |
|
2182
Range Resources
RRC
$9.11B
| $1.52M | ﹤0.01% |
+57,406
| New | +$1.45M |
|
2183
PUT
Restaurant Brands International
QSR
$25.1B
| $1.52M | ﹤0.01% |
22,600
-30,400
| -57% | -$1.98M |
|
|
FLNA
2184
PUT
Filana Therapeutics
FLNA
$43M
| $1.52M | ﹤0.01% |
62,900
-145,100
| -70% | -$4.02M |
|
2185
Renaissance IPO ETF
IPO
$154M
| $1.52M | ﹤0.01% |
51,826
+462
| +0.9% | +$12.8K |
|
2186
CALL
Albertsons Companies
ACI
$5.4B
| $1.51M | ﹤0.01% |
72,800
-24,200
| -25% | -$500K |
|
2187
Mattel
MAT
$4.17B
| $1.51M | ﹤0.01% |
82,138
+27,211
| +50% | +$506K |
|
2188
Zions Bancorporation
ZION
$10.1B
| $1.51M | ﹤0.01% |
+50,526
| New | +$2.31M |
|
|
OBE
2189
Obsidian Energy
OBE
$707M
| $1.51M | ﹤0.01% |
236,135
+210,854
| +834% | +$1.37M |
|
2190
PUT
Williams Companies
WMB
$90.5B
| $1.51M | ﹤0.01% |
50,600
-21,200
| -30% | -$655K |
|
2191
CALL
Graphic Packaging
GPK
$3.26B
| $1.51M | ﹤0.01% |
59,200
+21,000
| +55% | +$494K |
|
2192
CALL
Sundial Growers
SNDL
$325M
| $1.51M | ﹤0.01% |
943,700
-1,017,100
| -52% | -$2M |
|
2193
CALL
United States Brent Oil Fund
BNO
$815M
| $1.51M | ﹤0.01% |
56,700
-64,800
| -53% | -$1.75M |
|
2194
CALL
Rithm Capital
RITM
$5.09B
| $1.51M | ﹤0.01% |
188,300
-247,500
| -57% | -$2.18M |
|
2195
PUT
Rambus
RMBS
$10.4B
| $1.5M | ﹤0.01% |
29,300
+22,700
| +344% | +$975K |
|
|
SAVE
2196
PUT
DELISTED
Spirit Airlines, Inc.
SAVE
| $1.5M | ﹤0.01% |
87,400
+50,800
| +139% | +$949K |
|
2197
PUT
Acuity Brands
AYI
$9.88B
| $1.5M | ﹤0.01% |
8,200
+2,700
| +49% | +$498K |
|
2198
PUT
Innoviz Technologies
INVZ
$135M
| $1.49M | ﹤0.01% |
426,500
-31,200
| -7% | -$138K |
|
2199
CALL
Lightspeed Commerce
LSPD
$1.3B
| $1.49M | ﹤0.01% |
98,300
-5,300
| -5% | -$84K |
|
2200
Bloom Energy
BE
$52.6B
| $1.49M | ﹤0.01% |
74,723
+60,067
| +410% | +$1.32M |
|
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.