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 | |
|---|---|---|---|---|---|---|
1826
CALL
First Majestic Silver
AG
$8.05B
| $2.39M | ﹤0.01% |
423,000
-284,400
| -40% | -$1.82M |
|
1827
PUT
RingCentral
RNG
$4.05B
| $2.39M | ﹤0.01% |
73,000
-112,900
| -61% | -$3.47M |
|
|
TBCH
1828
PUT
Turtle Beach Corp
TBCH
$239M
| $2.39M | ﹤0.01% |
205,100
+164,300
| +403% | +$1.83M |
|
1829
PUT
F5
FFIV
$22.1B
| $2.38M | ﹤0.01% |
16,300
+11,100
| +213% | +$1.58M |
|
1830
CALL
Halozyme
HALO
$9.72B
| $2.38M | ﹤0.01% |
66,100
-22,400
| -25% | -$764K |
|
1831
AstraZeneca
AZN
$263B
| $2.38M | ﹤0.01% |
+16,654
| New | +$2.45M |
|
1832
Domino's
DPZ
$11B
| $2.38M | ﹤0.01% |
+7,068
| New | +$2.23M |
|
1833
CALL
Kenvue
KVUE
$37B
| $2.38M | ﹤0.01% |
+90,000
| New | +$2.35M |
|
|
GAP
1834
CALL
The Gap Inc
GAP
$6.84B
| $2.38M | ﹤0.01% |
266,100
+5,500
| +2% | +$49.1K |
|
1835
CALL
JPMorgan Inflation Managed Bond ETF
JCPI
$865M
| $2.37M | ﹤0.01% |
49,100
+31,100
| +173% | +$1.46M |
|
1836
PUT
Henry Schein
HSIC
$9.74B
| $2.37M | ﹤0.01% |
29,200
+18,600
| +175% | +$1.47M |
|
1837
PUT
Nano X Imaging
NNOX
$62.4M
| $2.37M | ﹤0.01% |
152,900
+132,800
| +661% | +$1.84M |
|
1838
PUT
Burford Capital
BUR
$907M
| $2.37M | ﹤0.01% |
194,300
+176,900
| +1,017% | +$2.29M |
|
1839
CALL
Vail Resorts
MTN
$5.19B
| $2.37M | ﹤0.01% |
9,400
-11,300
| -55% | -$2.75M |
|
1840
PUT
2x Long VIX Futures ETF
UVIX
$286M
| $2.37M | ﹤0.01% |
71
-5
| -7% | -$97.3K |
|
1841
PUT
Valley National Bancorp
VLY
$7.93B
| $2.36M | ﹤0.01% |
305,100
+179,000
| +142% | +$1.42M |
|
1842
CALL
Lamar Advertising Co
LAMR
$16.2B
| $2.36M | ﹤0.01% |
23,800
-5,500
| -19% | -$534K |
|
1843
PUT
Vir Biotechnology
VIR
$1.47B
| $2.36M | ﹤0.01% |
96,300
+91,800
| +2,040% | +$2.31M |
|
1844
CALL
Ingersoll Rand
IR
$33B
| $2.36M | ﹤0.01% |
36,100
-19,100
| -35% | -$1.13M |
|
1845
PUT
BlackBerry
BB
$5.01B
| $2.36M | ﹤0.01% |
426,500
+179,200
| +72% | +$868K |
|
|
DQ
1846
PUT
Daqo New Energy
DQ
$790M
| $2.36M | ﹤0.01% |
59,400
-17,800
| -23% | -$742K |
|
1847
PUT
NCR Voyix
VYX
$1.06B
| $2.36M | ﹤0.01% |
152,405
+45,314
| +42% | +$654K |
|
1848
PUT
Royalty Pharma
RPRX
$26.1B
| $2.35M | ﹤0.01% |
76,600
+43,400
| +131% | +$1.47M |
|
|
FYBR
1849
DELISTED
Frontier Communications
FYBR
| $2.35M | ﹤0.01% |
+126,157
| New | +$2.37M |
|
1850
PUT
CSX Corp
CSX
$98.6B
| $2.34M | ﹤0.01% |
68,600
+19,200
| +39% | +$607K |
|
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.