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 | |
|---|---|---|---|---|---|---|
|
NWECW
5176
CALL
DELISTED
NORTHWESTERN CORPORATION WARANTS
NWECW
| $98K | ﹤0.01% |
1,700
+1,500
| +750% | +$86.5K |
|
5177
PUT
Build-A-Bear
BBW
$442M
| $97K | ﹤0.01% |
4,200
-2,500
| -37% | -$58.1K |
|
5178
PUT
Compass
COMP
$8.56B
| $97K | ﹤0.01% |
30,200
+2,300
| +8% | +$7.89K |
|
5179
CALL
Extra Space Storage
EXR
$31.3B
| $97K | ﹤0.01% |
600
-5,000
| -89% | -$786K |
|
5180
iShares US Energy ETF
IYE
$1.73B
| $97K | ﹤0.01% |
+2,235
| New | +$101K |
|
5181
CALL
Champion Homes
SKY
$4.41B
| $97K | ﹤0.01% |
1,300
-700
| -35% | -$45.1K |
|
5182
CALL
Telephone and Data Systems
TDS
$3.82B
| $97K | ﹤0.01% |
9,300
+100
| +1% | +$1.17K |
|
|
ZIMV
5183
CALL
DELISTED
ZimVie
ZIMV
| $97K | ﹤0.01% |
13,500
+9,900
| +275% | +$84.3K |
|
|
VLD
5184
CALL
DELISTED
Velo3D, Inc.
VLD
| $97K | ﹤0.01% |
1,226
+1,109
| +948% | +$99.6K |
|
|
SRNE
5185
CALL
DELISTED
Sorrento Therapeutics, Inc.
SRNE
| $97K | ﹤0.01% |
272,200
-190,000
| -41% | -$170K |
|
|
AHRT
5186
PUT
AH Realty Trust
AHRT
$536M
| $96K | ﹤0.01% |
8,200
+4,100
| +100% | +$50.4K |
|
5187
PUT
Annexon
ANNX
$863M
| $96K | ﹤0.01% |
25,000
-150,900
| -86% | -$830K |
|
5188
CACI
CACI
$10.5B
| $96K | ﹤0.01% |
327
+176
| +117% | +$51.9K |
|
|
EFC
5189
PUT
Ellington Financial
EFC
$1.69B
| $96K | ﹤0.01% |
7,900
+1,200
| +18% | +$15.5K |
|
5190
Expensify
EXFY
$178M
| $96K | ﹤0.01% |
11,871
+11,758
| +10,405% | +$105K |
|
5191
PUT
Groupon
GRPN
$1.06B
| $96K | ﹤0.01% |
22,900
-19,400
| -46% | -$134K |
|
5192
CALL
Hawaiian Electric Industries
HE
$2.28B
| $96K | ﹤0.01% |
2,500
-3,300
| -57% | -$134K |
|
|
SCS
5193
DELISTED
Steelcase
SCS
| $96K | ﹤0.01% |
11,490
-19,119
| -62% | -$147K |
|
5194
CALL
Senseonics Holdings Inc
SENS
$265M
| $96K | ﹤0.01% |
6,790
-26,025
| -79% | -$523K |
|
5195
CALL
Zurn Elkay Water Solutions
ZWS
$8.31B
| $96K | ﹤0.01% |
4,500
+100
| +2% | +$2.2K |
|
5196
Alto Ingredients
ALTO
$358M
| $95K | ﹤0.01% |
63,550
-174,595
| -73% | -$478K |
|
5197
PUT
Bit Digital
BTBT
$502M
| $95K | ﹤0.01% |
61,900
+32,000
| +107% | +$40.8K |
|
5198
Cadiz
CDZI
$264M
| $95K | ﹤0.01% |
23,753
+4,642
| +24% | +$18.7K |
|
5199
PUT
GrafTech
EAF
$169M
| $95K | ﹤0.01% |
1,960
+1,770
| +932% | +$95.8K |
|
5200
Embecta
EMBC
$217M
| $95K | ﹤0.01% |
3,410
+640
| +23% | +$18.2K |
|
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.