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 | |
|---|---|---|---|---|---|---|
1901
CALL
Tanger
SKT
$4.82B
| $2.2M | ﹤0.01% |
99,800
+28,800
| +41% | +$577K |
|
1902
PUT
YPF
YPF
$20.2B
| $2.2M | ﹤0.01% |
147,900
+40,400
| +38% | +$490K |
|
1903
PUT
Manchester United
MANU
$3.91B
| $2.2M | ﹤0.01% |
90,300
-219,800
| -71% | -$4.55M |
|
1904
PUT
Under Armour Class C
UA
$2.92B
| $2.2M | ﹤0.01% |
309,400
-367,500
| -54% | -$2.7M |
|
1905
PUT
Consolidated Edison
ED
$41.6B
| $2.2M | ﹤0.01% |
24,300
-14,700
| -38% | -$1.41M |
|
1906
CALL
US Foods
USFD
$21.4B
| $2.19M | ﹤0.01% |
49,900
-155,800
| -76% | -$6.18M |
|
1907
United States Oil Fund
USO
$2.45B
| $2.19M | ﹤0.01% |
34,543
-22,124
| -39% | -$1.44M |
|
1908
CALL
Yum China
YUMC
$14.9B
| $2.19M | ﹤0.01% |
38,800
-72,600
| -65% | -$4.38M |
|
1909
PUT
Rollins
ROL
$18.6B
| $2.19M | ﹤0.01% |
51,100
+8,900
| +21% | +$362K |
|
1910
PUT
First Horizon
FHN
$12.1B
| $2.19M | ﹤0.01% |
194,100
+97,400
| +101% | +$1.3M |
|
|
LKFT
1911
PUT
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.82B
| $2.19M | ﹤0.01% |
53,800
-19,200
| -26% | -$783K |
|
1912
PUT
First Majestic Silver
AG
$8.05B
| $2.18M | ﹤0.01% |
386,600
-6,400
| -2% | -$41K |
|
1913
CALL
FerroAtlántica
GSM
$628M
| $2.18M | ﹤0.01% |
457,500
-6,600
| -1% | -$30.3K |
|
1914
CALL
DigitalBridge
DBRG
$2.94B
| $2.18M | ﹤0.01% |
148,300
+64,900
| +78% | +$796K |
|
1915
CALL
CoStar Group
CSGP
$11.3B
| $2.18M | ﹤0.01% |
24,500
+2,200
| +10% | +$170K |
|
1916
CALL
Edison International
EIX
$30.7B
| $2.18M | ﹤0.01% |
31,400
+25,000
| +391% | +$1.76M |
|
1917
CALL
Aurinia Pharmaceuticals
AUPH
$1.97B
| $2.18M | ﹤0.01% |
225,000
-4,200
| -2% | -$43.6K |
|
1918
PUT
Motorola Solutions
MSI
$69.4B
| $2.17M | ﹤0.01% |
7,400
-400
| -5% | -$115K |
|
1919
PUT
Ecolab
ECL
$75.6B
| $2.17M | ﹤0.01% |
11,600
-4,500
| -28% | -$774K |
|
1920
PUT
McCormick & Company Non-Voting
MKC
$13.4B
| $2.16M | ﹤0.01% |
24,800
-15,100
| -38% | -$1.33M |
|
1921
CALL
Viatris
VTRS
$20.1B
| $2.16M | ﹤0.01% |
216,500
-20,400
| -9% | -$195K |
|
1922
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$105M
| $2.16M | ﹤0.01% |
80,700
-159,600
| -66% | -$3.58M |
|
|
1923
PUT
Yum China
YUMC
$14.9B
| $2.15M | ﹤0.01% |
38,100
-27,300
| -42% | -$1.65M |
|
1924
PUT
Omnicom Group
OMC
$22.7B
| $2.14M | ﹤0.01% |
22,500
+8,200
| +57% | +$761K |
|
1925
PUT
IDEAYA Biosciences
IDYA
$3.41B
| $2.14M | ﹤0.01% |
+91,000
| New | +$1.87M |
|
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.