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 | |
|---|---|---|---|---|---|---|
5101
Kinetik
KNTK
$3.68B
| $98K | ﹤0.01% |
2,806
+685
| +32% | +$21.7K |
|
5102
CALL
Life Time Group Holdings
LTH
$9.84B
| $98K | ﹤0.01% |
5,000
-154,500
| -97% | -$2.95M |
|
5103
MacroGenics
MGNX
$240M
| $98K | ﹤0.01% |
18,437
-521
| -3% | -$3.21K |
|
|
ODP
5104
CALL
DELISTED
ODP
ODP
| $98K | ﹤0.01% |
2,100
+300
| +17% | +$12.9K |
|
5105
PUT
Red Rock Resorts
RRR
$3.8B
| $98K | ﹤0.01% |
2,100
+1,300
| +163% | +$60.4K |
|
|
SNBR
5106
CALL
DELISTED
Sleep Number
SNBR
| $98K | ﹤0.01% |
3,600
-4,000
| -53% | -$91.3K |
|
5107
PUT
TE Connectivity
TEL
$59.9B
| $98K | ﹤0.01% |
700
+600
| +600% | +$75.9K |
|
5108
CALL
TFS Financial
TFSL
$5.06B
| $98K | ﹤0.01% |
7,800
+3,800
| +95% | +$46.1K |
|
5109
PUT
Tandem Diabetes Care
TNDM
$1.3B
| $98K | ﹤0.01% |
4,000
+800
| +25% | +$25.7K |
|
5110
CALL
Vital Farms
VITL
$536M
| $98K | ﹤0.01% |
8,200
+2,300
| +39% | +$32.1K |
|
5111
PUT
Vanguard S&P 500 Growth ETF
VOOG
$25.5B
| $98K | ﹤0.01% |
7,200
+6,000
| +500% | +$239K |
|
|
SUM
5112
CALL
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $98K | ﹤0.01% |
2,600
+2,200
| +550% | +$68.1K |
|
5113
PUT
AerSale
ASLE
$291M
| $97K | ﹤0.01% |
6,600
-13,500
| -67% | -$217K |
|
5114
Build-A-Bear
BBW
$442M
| $97K | ﹤0.01% |
4,572
+1,011
| +28% | +$22.1K |
|
5115
CALL
CorMedix
CRMD
$588M
| $97K | ﹤0.01% |
24,700
-3,400
| -12% | -$16.8K |
|
5116
PUT
Excelerate Energy
EE
$1.22B
| $97K | ﹤0.01% |
4,800
-200
| -4% | -$4.18K |
|
5117
eHealth
EHTH
$43.8M
| $97K | ﹤0.01% |
12,159
-22,768
| -65% | -$182K |
|
|
GOOD
5118
CALL
Gladstone Commercial Corp
GOOD
$606M
| $97K | ﹤0.01% |
7,900
+3,200
| +68% | +$38.4K |
|
5119
Neonode
NEON
$13.4M
| $97K | ﹤0.01% |
12,015
+628
| +6% | +$4.69K |
|
5120
Pampa Energía
PAM
$4.77B
| $97K | ﹤0.01% |
+2,248
| New | +$83.3K |
|
5121
PTC Therapeutics
PTCT
$6.26B
| $97K | ﹤0.01% |
+2,403
| New | +$118K |
|
5122
CALL
Perella Weinberg Partners
PWP
$1.09B
| $97K | ﹤0.01% |
11,700
-2,900
| -20% | -$23.9K |
|
|
RPTX
5123
PUT
DELISTED
Repare Therapeutics
RPTX
| $97K | ﹤0.01% |
9,200
+5,200
| +130% | +$53.6K |
|
5124
Tarsus Pharmaceuticals
TARS
$2.6B
| $97K | ﹤0.01% |
+5,383
| New | +$85.6K |
|
5125
PUT
Bio-Techne
TECH
$11.2B
| $97K | ﹤0.01% |
1,200
-1,000
| -45% | -$80.4K |
|
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.