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 | |
|---|---|---|---|---|---|---|
4351
CALL
Playboy Inc
PLBY
$141M
| $194K | ﹤0.01% |
98,200
-83,100
| -46% | -$207K |
|
|
EMBK
4352
DELISTED
Embark Technology, Inc. Common Stock
EMBK
| $194K | ﹤0.01% |
+69,333
| New | +$255K |
|
4353
PUT
ABM Industries
ABM
$2.91B
| $193K | ﹤0.01% |
4,300
+3,200
| +291% | +$148K |
|
4354
CALL
Broadstone Net Lease
BNL
$4.32B
| $193K | ﹤0.01% |
11,400
+6,800
| +148% | +$118K |
|
4355
CALL
Uranium Energy
UEC
$4.59B
| $193K | ﹤0.01% |
67,200
-161,500
| -71% | -$584K |
|
|
AEL
4356
PUT
DELISTED
American Equity Investment Life Holding Company
AEL
| $193K | ﹤0.01% |
5,300
+5,200
| +5,200% | +$221K |
|
|
EBIX
4357
DELISTED
Ebix Inc
EBIX
| $193K | ﹤0.01% |
14,688
-5,830
| -28% | -$101K |
|
4358
PUT
Burford Capital
BUR
$940M
| $192K | ﹤0.01% |
17,400
+16,800
| +2,800% | +$139K |
|
|
GRFS
4359
Grifois
GRFS
$5.59B
| $192K | ﹤0.01% |
26,180
+2,698
| +11% | +$23.4K |
|
|
NNDM
4360
PUT
Nano Dimension
NNDM
$316M
| $192K | ﹤0.01% |
66,600
+27,100
| +69% | +$72.9K |
|
|
RYZ
4361
PUT
Ryerson Holding Corp
RYZ
$1.59B
| $192K | ﹤0.01% |
5,300
+4,800
| +960% | +$174K |
|
4362
CALL
Banco Santander
SAN
$196B
| $192K | ﹤0.01% |
52,200
-82,700
| -61% | -$294K |
|
4363
CALL
CenterPoint Energy
CNP
$29.1B
| $191K | ﹤0.01% |
6,500
-15,600
| -71% | -$456K |
|
4364
GE Aerospace
GE
$372B
| $191K | ﹤0.01% |
2,506
-704
| -22% | -$47.1K |
|
4365
Infosys
INFY
$50B
| $191K | ﹤0.01% |
10,979
-188,902
| -95% | -$3.44M |
|
4366
PUT
Kosmos Energy
KOS
$1.44B
| $191K | ﹤0.01% |
25,700
-43,400
| -63% | -$318K |
|
4367
PUT
Leggett & Platt
LEG
$1.43B
| $191K | ﹤0.01% |
6,000
-6,800
| -53% | -$229K |
|
4368
CALL
NexGen Energy
NXE
$6.03B
| $191K | ﹤0.01% |
49,900
-49,600
| -50% | -$213K |
|
4369
Schwab Emerging Markets Equity ETF
SCHE
$12.2B
| $191K | ﹤0.01% |
7,791
+1,191
| +18% | +$29.5K |
|
|
TGNA
4370
CALL
DELISTED
TEGNA Inc
TGNA
| $191K | ﹤0.01% |
11,300
+6,900
| +157% | +$129K |
|
|
ERF
4371
CALL
DELISTED
Enerplus Corporation
ERF
| $191K | ﹤0.01% |
13,300
-41,600
| -76% | -$670K |
|
4372
CALL
Alignment Healthcare
ALHC
$3.76B
| $190K | ﹤0.01% |
30,000
-11,600
| -28% | -$111K |
|
4373
PUT
Ardagh Metal Packaging
AMBP
$2.99B
| $190K | ﹤0.01% |
46,600
+26,400
| +131% | +$130K |
|
4374
PUT
Celldex Therapeutics
CLDX
$2.84B
| $190K | ﹤0.01% |
5,300
-15,200
| -74% | -$656K |
|
4375
3D Systems Corp
DDD
$413M
| $190K | ﹤0.01% |
+17,761
| New | +$181K |
|
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.