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 | |
|---|---|---|---|---|---|---|
3651
CALL
RXO
RXO
$3.73B
| $358K | ﹤0.01% |
15,800
+8,700
| +123% | +$175K |
|
|
TPH
3652
PUT
DELISTED
Tri Pointe Homes
TPH
| $358K | ﹤0.01% |
10,900
-3,600
| -25% | -$105K |
|
|
TERN
3653
DELISTED
Terns Pharmaceuticals
TERN
| $357K | ﹤0.01% |
+40,885
| New | +$477K |
|
3654
PUT
Xponential Fitness
XPOF
$282M
| $357K | ﹤0.01% |
20,700
+12,900
| +165% | +$365K |
|
|
EMBK
3655
DELISTED
Embark Technology, Inc. Common Stock
EMBK
| $357K | ﹤0.01% |
124,983
+55,650
| +80% | +$156K |
|
3656
CALL
Hudbay
HBM
$9.67B
| $356K | ﹤0.01% |
74,300
+36,000
| +94% | +$176K |
|
3657
Oshkosh
OSK
$9.51B
| $356K | ﹤0.01% |
+4,118
| New | +$324K |
|
3658
CALL
Applied Optoelectronics
AAOI
$7.07B
| $355K | ﹤0.01% |
59,700
+54,500
| +1,048% | +$143K |
|
3659
Copa Holdings
CPA
$5.71B
| $355K | ﹤0.01% |
+3,214
| New | +$322K |
|
3660
UroGen Pharma
URGN
$1.99B
| $355K | ﹤0.01% |
34,339
-622
| -2% | -$6.86K |
|
3661
Roundhill Generative AI & Technology ETF
CHAT
$1.66B
| $354K | ﹤0.01% |
+12,327
| New | +$346K |
|
3662
Fortuna Silver Mines
FSM
$2.55B
| $354K | ﹤0.01% |
109,484
-20,244
| -16% | -$72.2K |
|
3663
PUT
Full Truck Alliance
YMM
$9.64B
| $354K | ﹤0.01% |
57,000
-9,600
| -14% | -$61.9K |
|
|
NEX
3664
CALL
DELISTED
NexTier Oilfield Solutions Inc.
NEX
| $354K | ﹤0.01% |
39,700
-6,300
| -14% | -$52K |
|
|
BBBY
3665
PUT
DELISTED
Bed Bath & Beyond Inc
BBBY
| $354K | ﹤0.01% |
1,289,400
-1,916,300
| -60% | -$488K |
|
|
ARVL
3666
PUT
DELISTED
Arrival Ordinary Shares
ARVL
| $354K | ﹤0.01% |
137,400
+134,660
| +4,915% | +$426K |
|
3667
PUT
Westrock Coffee
WEST
$803M
| $353K | ﹤0.01% |
32,500
-3,600
| -10% | -$41.7K |
|
3668
CALL
Amprius Technologies
AMPX
$1.29B
| $352K | ﹤0.01% |
49,100
-119,200
| -71% | -$1.02M |
|
3669
PUT
BrightView Holdings
BV
$1.3B
| $352K | ﹤0.01% |
49,100
-9,600
| -16% | -$60.7K |
|
|
DMC
3670
PUT
Del Monte Corp
DMC
$1.37B
| $352K | ﹤0.01% |
13,700
+11,900
| +661% | +$328K |
|
3671
PUT
Arthur J. Gallagher & Co
AJG
$68.2B
| $351K | ﹤0.01% |
1,600
-2,900
| -64% | -$603K |
|
|
IPG
3672
PUT
DELISTED
Interpublic Group of Companies
IPG
| $351K | ﹤0.01% |
9,100
+6,800
| +296% | +$257K |
|
3673
CALL
Arhaus
ARHS
$1.12B
| $350K | ﹤0.01% |
33,600
+3,900
| +13% | +$31.8K |
|
|
SNV
3674
PUT
DELISTED
Synovus
SNV
| $350K | ﹤0.01% |
11,600
-29,600
| -72% | -$866K |
|
|
NVTA
3675
CALL
DELISTED
Invitae Corporation
NVTA
| $350K | ﹤0.01% |
310,600
-181,200
| -37% | -$228K |
|
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.