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 | |
|---|---|---|---|---|---|---|
5301
PUT
Methode Electronics
MEI
$486M
| $87K | ﹤0.01% |
2,000
+1,900
| +1,900% | +$88K |
|
5302
PUT
National Health Investors
NHI
$3.69B
| $87K | ﹤0.01% |
1,700
-500
| -23% | -$27.3K |
|
5303
Outdoor Holding Co
POWW
$247M
| $87K | ﹤0.01% |
44,207
+1,939
| +5% | +$4.01K |
|
|
SCPH
5304
PUT
DELISTED
scPharmaceuticals
SCPH
| $87K | ﹤0.01% |
9,600
+3,600
| +60% | +$26.4K |
|
|
TSVT
5305
CALL
DELISTED
2seventy bio
TSVT
| $87K | ﹤0.01% |
8,600
+4,800
| +126% | +$54.9K |
|
|
ME
5306
DELISTED
23andMe Holding Co
ME
| $87K | ﹤0.01% |
1,923
-2,027
| -51% | -$97.8K |
|
5307
CALL
Anika Therapeutics
ANIK
$242M
| $86K | ﹤0.01% |
+3,000
| New | +$89.3K |
|
5308
Arvinas
ARVN
$536M
| $86K | ﹤0.01% |
+3,177
| New | +$100K |
|
5309
CALL
Compass
COMP
$8.56B
| $86K | ﹤0.01% |
26,800
-40,100
| -60% | -$138K |
|
5310
Establishment Labs
ESTA
$2.75B
| $86K | ﹤0.01% |
+1,270
| New | +$87.1K |
|
5311
CALL
Gates Industrial Corporation Ltd.
GTES
$6.53B
| $86K | ﹤0.01% |
6,200
+5,200
| +520% | +$69.3K |
|
|
BINI
5312
PUT
DELISTED
Bollinger Innovations
BINI
| – | – |
0
| – | – |
|
5313
Neonode
NEON
$13.4M
| $86K | ﹤0.01% |
+11,387
| New | +$93.9K |
|
|
NOTV
5314
DELISTED
Inotiv
NOTV
| $86K | ﹤0.01% |
20,022
-45,943
| -70% | -$293K |
|
5315
CALL
Ocular Therapeutix
OCUL
$1.85B
| $86K | ﹤0.01% |
16,500
+12,000
| +267% | +$57K |
|
5316
PUT
Revolution Medicines
RVMD
$40.9B
| $86K | ﹤0.01% |
+4,000
| New | +$98.5K |
|
5317
Senseonics Holdings Inc
SENS
$265M
| $86K | ﹤0.01% |
6,088
+1,581
| +35% | +$31.8K |
|
|
UCTT
5318
PUT
Ultra Clean Holdings
UCTT
$3.73B
| $86K | ﹤0.01% |
2,600
-4,000
| -61% | -$132K |
|
5319
UFP Industries
UFPI
$4.87B
| $86K | ﹤0.01% |
1,090
+99
| +10% | +$8.47K |
|
|
EVBG
5320
CALL
DELISTED
Everbridge, Inc. Common Stock
EVBG
| $86K | ﹤0.01% |
2,500
+1,800
| +257% | +$57.5K |
|
5321
AbCellera Biologics
ABCL
$1.74B
| $85K | ﹤0.01% |
11,347
-89,144
| -89% | -$809K |
|
5322
PUT
Cheniere Energy
CQP
$31.5B
| $85K | ﹤0.01% |
1,800
-1,200
| -40% | -$61.3K |
|
5323
PUT
CorMedix
CRMD
$588M
| $85K | ﹤0.01% |
20,700
-100
| -0.5% | -$409 |
|
|
DAWN
5324
DELISTED
Day One Biopharmaceuticals
DAWN
| $85K | ﹤0.01% |
+6,413
| New | +$125K |
|
5325
Hubbell
HUBB
$25B
| $85K | ﹤0.01% |
353
+185
| +110% | +$44.3K |
|
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.