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 | |
|---|---|---|---|---|---|---|
5326
PUT
IAMGOLD
IAG
$8.12B
| $85K | ﹤0.01% |
31,600
+10,500
| +50% | +$26.7K |
|
5327
PUT
Icon
ICLR
$12.7B
| $85K | ﹤0.01% |
400
-100
| -20% | -$22.3K |
|
5328
Immunic
IMUX
$192M
| $85K | ﹤0.01% |
5,758
+1,557
| +37% | +$28.9K |
|
|
IPG
5329
PUT
DELISTED
Interpublic Group of Companies
IPG
| $85K | ﹤0.01% |
2,300
-2,700
| -54% | -$97K |
|
|
KW
5330
DELISTED
Kennedy-Wilson Holdings
KW
| $85K | ﹤0.01% |
+5,131
| New | +$87.4K |
|
|
ACH
5331
CALL
Accendra Health
ACH
$257M
| $85K | ﹤0.01% |
5,900
+4,700
| +392% | +$84.2K |
|
5332
CALL
RCM Technologies
RCMT
$202M
| $85K | ﹤0.01% |
7,400
+6,900
| +1,380% | +$90.9K |
|
5333
PUT
SiTime
SITM
$16.7B
| $85K | ﹤0.01% |
600
+400
| +200% | +$49.1K |
|
|
FIRY
5334
CALL
Firy Inc
FIRY
$148M
| $85K | ﹤0.01% |
7,185
-8,935
| -55% | -$118K |
|
5335
PUT
SouthState Bank Corp
SSB
$10.3B
| $85K | ﹤0.01% |
+1,200
| New | +$93.4K |
|
5336
Interface
TILE
$1.95B
| $85K | ﹤0.01% |
10,587
+2,161
| +26% | +$21.3K |
|
5337
Vital Farms
VITL
$537M
| $85K | ﹤0.01% |
5,573
+4,269
| +327% | +$67.6K |
|
|
CCEC
5338
CALL
Capital Clean Energy Carriers
CCEC
$1.32B
| $85K | ﹤0.01% |
6,400
+2,200
| +52% | +$30.3K |
|
|
TUP
5339
CALL
DELISTED
Tupperware Brands Corporation
TUP
| $85K | ﹤0.01% |
34,300
-2,100
| -6% | -$7.74K |
|
|
DCFC
5340
DELISTED
Tritium DCFC Limited Ordinary Shares
DCFC
| $85K | ﹤0.01% |
332
-41
| -11% | -$12K |
|
|
APPH
5341
CALL
DELISTED
AppHarvest, Inc. Common Stock
APPH
| $85K | ﹤0.01% |
140,400
-91,100
| -39% | -$109K |
|
5342
PUT
Cohu
COHU
$2.41B
| $84K | ﹤0.01% |
2,200
+1,100
| +100% | +$39.8K |
|
5343
CorMedix
CRMD
$584M
| $84K | ﹤0.01% |
20,295
+4,797
| +31% | +$19.6K |
|
5344
PUT
NexGen Energy
NXE
$6.11B
| $84K | ﹤0.01% |
22,000
+10,400
| +90% | +$44.7K |
|
5345
PUT
Repligen
RGEN
$8.03B
| $84K | ﹤0.01% |
500
-1,000
| -67% | -$178K |
|
|
SOL
5346
CALL
DELISTED
Emeren Group
SOL
| $84K | ﹤0.01% |
19,000
-7,400
| -28% | -$34.8K |
|
5347
PUT
Taboola.com
TBLA
$1.4B
| $84K | ﹤0.01% |
31,000
-6,800
| -18% | -$22.9K |
|
|
FREE
5348
PUT
DELISTED
Whole Earth Brands, Inc. Class A Common Stock
FREE
| $84K | ﹤0.01% |
+33,000
| New | +$113K |
|
5349
CALL
BancFirst
BANF
$3.81B
| $83K | ﹤0.01% |
+1,000
| New | +$86.2K |
|
5350
PUT
Century Communities
CCS
$1.95B
| $83K | ﹤0.01% |
1,300
-2,700
| -68% | -$161K |
|
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.