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 | |
|---|---|---|---|---|---|---|
4176
CALL
3D Systems Corp
DDD
$395M
| $223K | ﹤0.01% |
22,500
-2,000
| -8% | -$18.3K |
|
4177
PUT
ADMA Biologics
ADMA
$2.04B
| $222K | ﹤0.01% |
60,200
-6,800
| -10% | -$25.2K |
|
|
API
4178
CALL
Agora
API
$331M
| $222K | ﹤0.01% |
+71,200
| New | +$231K |
|
4179
PUT
BRC Inc
BRCC
$123M
| $222K | ﹤0.01% |
43,100
+3,900
| +10% | +$20.6K |
|
|
UNIT
4180
PUT
Uniti Group
UNIT
$2.46B
| $222K | ﹤0.01% |
48,200
+15,700
| +48% | +$59K |
|
4181
CALL
Select Water Solutions
WTTR
$2.2B
| $222K | ﹤0.01% |
27,500
-9,000
| -25% | -$68K |
|
4182
PUT
Neogen
NEOG
$2B
| $221K | ﹤0.01% |
10,200
-800
| -7% | -$14.5K |
|
|
TIGR
4183
UP Fintech Holding
TIGR
$845M
| $221K | ﹤0.01% |
77,863
+77,698
| +47,090% | +$230K |
|
4184
CALL
AdaptHealth
AHCO
$1.49B
| $220K | ﹤0.01% |
18,100
-62,700
| -78% | -$699K |
|
4185
PUT
Arcturus Therapeutics
ARCT
$160M
| $220K | ﹤0.01% |
7,700
-6,100
| -44% | -$166K |
|
4186
PUT
DTE Energy
DTE
$30.2B
| $220K | ﹤0.01% |
2,000
-13,700
| -87% | -$1.53M |
|
4187
Brinker International
EAT
$8.84B
| $220K | ﹤0.01% |
6,037
+3,555
| +143% | +$134K |
|
|
TPH
4188
CALL
DELISTED
Tri Pointe Homes
TPH
| $220K | ﹤0.01% |
6,700
+3,400
| +103% | +$99.6K |
|
|
SCPL
4189
DELISTED
SciPlay Corporation Class A Common Stock
SCPL
| $220K | ﹤0.01% |
11,204
+10,729
| +2,259% | +$195K |
|
|
BDN
4190
CALL
Brandywine Realty Trust
BDN
$521M
| $219K | ﹤0.01% |
47,300
-4,500
| -9% | -$18.4K |
|
4191
CALL
Casey's General Stores
CASY
$32.5B
| $219K | ﹤0.01% |
+900
| New | +$204K |
|
4192
CALL
Procept Biorobotics
PRCT
$1.03B
| $219K | ﹤0.01% |
6,200
+5,800
| +1,450% | +$192K |
|
|
FREE
4193
CALL
DELISTED
Whole Earth Brands, Inc. Class A Common Stock
FREE
| $219K | ﹤0.01% |
54,500
+41,300
| +313% | +$115K |
|
4194
PUT
Equinox Gold
EQX
$6.92B
| $218K | ﹤0.01% |
47,800
-1,400
| -3% | -$7.02K |
|
4195
PUT
Global Partners
GLP
$1.68B
| $218K | ﹤0.01% |
7,100
+2,200
| +45% | +$67K |
|
4196
CALL
Recursion Pharmaceuticals
RXRX
$1.57B
| $218K | ﹤0.01% |
29,300
+19,100
| +187% | +$134K |
|
4197
CALL
System1
SST
$14.7M
| $218K | ﹤0.01% |
4,860
-3,910
| -45% | -$148K |
|
|
UDMY
4198
PUT
DELISTED
Udemy
UDMY
| $218K | ﹤0.01% |
20,400
-126,700
| -86% | -$1.21M |
|
4199
CALL
Wolverine World Wide
WWW
$1.68B
| $218K | ﹤0.01% |
14,900
-5,500
| -27% | -$84.1K |
|
4200
PUT
ZTO Express
ZTO
$18.3B
| $218K | ﹤0.01% |
8,700
-144,000
| -94% | -$3.96M |
|
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.