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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6126
CALL
Health Catalyst
HCAT
$154M
| $37K | ﹤0.01% |
3,000
+2,900
| +2,900% | +$34.5K |
|
|
IPG
6127
DELISTED
Interpublic Group of Companies
IPG
| $37K | ﹤0.01% |
+963
| New | +$36.3K |
|
6128
CALL
LCI Industries
LCII
$2.5B
| $37K | ﹤0.01% |
+300
| New | +$34.4K |
|
6129
PUT
Olema Pharmaceuticals
OLMA
$1.03B
| $37K | ﹤0.01% |
4,200
+3,500
| +500% | +$21.1K |
|
6130
PUT
Rocket Pharmaceuticals
RCKT
$351M
| $37K | ﹤0.01% |
1,900
-5,900
| -76% | -$119K |
|
6131
PUT
Replimune Group
REPL
$455M
| $37K | ﹤0.01% |
+1,600
| New | +$31.3K |
|
6132
PUT
Ryman Hospitality Properties
RHP
$8.41B
| $37K | ﹤0.01% |
+400
| New | +$36.9K |
|
|
TSVT
6133
CALL
DELISTED
2seventy bio
TSVT
| $37K | ﹤0.01% |
3,700
-4,900
| -57% | -$51.9K |
|
6134
CALL
Verrica Pharmaceuticals
VRCA
$90.4M
| $37K | ﹤0.01% |
650
-4,350
| -87% | -$264K |
|
6135
Verastem
VSTM
$536M
| $37K | ﹤0.01% |
5,104
+3,771
| +283% | +$26.2K |
|
|
ASXC
6136
CALL
DELISTED
Asensus Surgical, Inc.
ASXC
| $37K | ﹤0.01% |
74,100
-15,100
| -17% | -$9.02K |
|
|
ICVX
6137
DELISTED
Icosavax, Inc. Common Stock
ICVX
| $37K | ﹤0.01% |
3,738
+2,373
| +174% | +$19K |
|
|
BBIG
6138
PUT
DELISTED
Vinco Ventures, Inc. Common Stock
BBIG
| $37K | ﹤0.01% |
21,000
+19,845
| +1,718% | +$60.9K |
|
6139
AudioEye
AEYE
$72.8M
| $36K | ﹤0.01% |
7,418
+7,357
| +12,061% | +$45K |
|
6140
ArcBest
ARCB
$3.17B
| $36K | ﹤0.01% |
374
-8,511
| -96% | -$761K |
|
|
AZEK
6141
DELISTED
The AZEK Co
AZEK
| $36K | ﹤0.01% |
+1,217
| New | +$31.5K |
|
6142
CALL
Columbia Banking Systems
COLB
$8.84B
| $36K | ﹤0.01% |
1,800
+700
| +64% | +$14.8K |
|
|
EB
6143
PUT
DELISTED
Eventbrite
EB
| $36K | ﹤0.01% |
3,800
-4,000
| -51% | -$31.5K |
|
6144
Enovix
ENVX
$912M
| $36K | ﹤0.01% |
2,286
-63,965
| -97% | -$744K |
|
6145
Evolent Health
EVH
$358M
| $36K | ﹤0.01% |
+1,200
| New | +$38.8K |
|
6146
PUT
EyePoint Inc
EYPT
$1.08B
| $36K | ﹤0.01% |
+4,200
| New | +$25.6K |
|
6147
PUT
Hyliion Holdings
HYLN
$646M
| $36K | ﹤0.01% |
22,000
-5,100
| -19% | -$8.6K |
|
6148
IDEX
IEX
$17.3B
| $36K | ﹤0.01% |
+169
| New | +$35.5K |
|
|
LTC
6149
PUT
LTC Properties
LTC
$2.06B
| $36K | ﹤0.01% |
1,100
-11,200
| -91% | -$374K |
|
|
NAK
6150
CALL
Northern Dynasty Minerals
NAK
$779M
| $36K | ﹤0.01% |
153,700
-20,800
| -12% | -$4.73K |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.