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 | |
|---|---|---|---|---|---|---|
4176
Beam Global
BEEM
$23.1M
| $226K | ﹤0.01% |
14,206
+374
| +3% | +$6.18K |
|
4177
CALL
Safe Bulkers
SB
$761M
| $226K | ﹤0.01% |
61,300
-54,900
| -47% | -$184K |
|
4178
Allegiant Air
ALGT
$2.73B
| $225K | ﹤0.01% |
+2,447
| New | +$220K |
|
|
APLS
4179
DELISTED
Apellis Pharmaceuticals
APLS
| $225K | ﹤0.01% |
+3,423
| New | +$198K |
|
|
KYNB
4180
PUT
Kyntra Bio
KYNB
$28.2M
| $225K | ﹤0.01% |
484
-60
| -11% | -$31.7K |
|
4181
PUT
1-800-Flowers.com
FLWS
$254M
| $225K | ﹤0.01% |
19,600
+18,700
| +2,078% | +$191K |
|
|
TWO
4182
PUT
Two Harbors Investment
TWO
$1.27B
| $225K | ﹤0.01% |
15,300
-19,000
| -55% | -$309K |
|
|
PETQ
4183
CALL
DELISTED
PetIQ, Inc. Class A Common Stock
PETQ
| $225K | ﹤0.01% |
19,700
-6,400
| -25% | -$71.1K |
|
|
CTIC
4184
CALL
DELISTED
CTI BioPharma Corp. (DE) Common Stock
CTIC
| $225K | ﹤0.01% |
53,600
-27,300
| -34% | -$142K |
|
4185
Alkami Technology
ALKT
$1.94B
| $224K | ﹤0.01% |
+17,706
| New | +$261K |
|
4186
PUT
Arvinas
ARVN
$529M
| $224K | ﹤0.01% |
8,200
+4,800
| +141% | +$152K |
|
4187
PUT
Graphic Packaging
GPK
$3.45B
| $224K | ﹤0.01% |
8,800
-23,900
| -73% | -$562K |
|
4188
PUT
Opendoor
OPEN
$3.8B
| $224K | ﹤0.01% |
131,957
+109,740
| +494% | +$181K |
|
|
4189
PUT
Safe Bulkers
SB
$761M
| $224K | ﹤0.01% |
60,800
+12,100
| +25% | +$40.6K |
|
4190
Trinity Capital Inc.
TRIN
$1.59B
| $224K | ﹤0.01% |
17,623
+14,842
| +534% | +$194K |
|
4191
PUT
California Resources
CRC
$4.38B
| $223K | ﹤0.01% |
5,800
+3,900
| +205% | +$161K |
|
4192
Navigator Holdings
NVGS
$1.34B
| $223K | ﹤0.01% |
15,944
+9,118
| +134% | +$118K |
|
4193
CALL
Banco Macro
BMA
$5.81B
| $222K | ﹤0.01% |
12,500
+3,500
| +39% | +$69.4K |
|
4194
PUT
Harmony Biosciences
HRMY
$2.07B
| $222K | ﹤0.01% |
6,800
+5,600
| +467% | +$255K |
|
4195
CALL
Perrigo
PRGO
$1.43B
| $222K | ﹤0.01% |
6,200
+5,400
| +675% | +$195K |
|
4196
PUT
Westlake Chemical Partners
WLKP
$776M
| $222K | ﹤0.01% |
10,100
+3,200
| +46% | +$75K |
|
|
USX
4197
PUT
DELISTED
U.S. Xpress Enterprises, Inc. Class A Common Stock
USX
| $222K | ﹤0.01% |
+37,500
| New | +$87.7K |
|
4198
PUT
ADMA Biologics
ADMA
$2.04B
| $221K | ﹤0.01% |
67,000
-47,800
| -42% | -$165K |
|
4199
CALL
Gain Therapeutics
GANX
$73.8M
| $221K | ﹤0.01% |
+46,000
| New | +$188K |
|
4200
CALL
POET Technologies
POET
$1.17B
| $221K | ﹤0.01% |
57,000
+56,300
| +8,043% | +$243K |
|
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.