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 | |
|---|---|---|---|---|---|---|
2101
LKQ Corp
LKQ
$6.58B
| $1.71M | ﹤0.01% |
29,368
+14,808
| +102% | +$824K |
|
2102
PUT
STAAR Surgical
STAA
$1.16B
| $1.71M | ﹤0.01% |
32,500
-2,700
| -8% | -$164K |
|
|
GOOS
2103
CALL
Canada Goose Holdings
GOOS
$868M
| $1.7M | ﹤0.01% |
95,700
-75,800
| -44% | -$1.36M |
|
2104
McCormick & Company Non-Voting
MKC
$13.4B
| $1.7M | ﹤0.01% |
19,514
-9,062
| -32% | -$801K |
|
|
TBCH
2105
Turtle Beach Corp
TBCH
$239M
| $1.7M | ﹤0.01% |
146,010
+98,342
| +206% | +$1.1M |
|
|
WW
2106
CALL
DELISTED
WW International
WW
| $1.7M | ﹤0.01% |
253,100
+118,100
| +87% | +$837K |
|
2107
Aurinia Pharmaceuticals
AUPH
$1.97B
| $1.7M | ﹤0.01% |
175,407
-86,163
| -33% | -$894K |
|
|
BCYC
2108
Bicycle Therapeutics
BCYC
$270M
| $1.7M | ﹤0.01% |
66,443
+40,555
| +157% | +$942K |
|
2109
PUT
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$263M
| $1.69M | ﹤0.01% |
22,800
-1,100
| -5% | -$57.1K |
|
2110
PUT
Natera
NTRA
$37.5B
| $1.69M | ﹤0.01% |
34,800
+32,500
| +1,413% | +$1.66M |
|
2111
Wyndham Hotels & Resorts
WH
$5.46B
| $1.69M | ﹤0.01% |
+24,685
| New | +$1.69M |
|
|
JMIA
2112
PUT
Jumia Technologies
JMIA
$726M
| $1.69M | ﹤0.01% |
494,200
-1,900
| -0.4% | -$5.83K |
|
2113
Extreme Networks
EXTR
$3.86B
| $1.68M | ﹤0.01% |
64,680
+64,621
| +109,527% | +$1.27M |
|
2114
Marathon Petroleum
MPC
$90.3B
| $1.68M | ﹤0.01% |
+14,431
| New | +$1.68M |
|
|
2115
PUT
Aurinia Pharmaceuticals
AUPH
$1.97B
| $1.68M | ﹤0.01% |
173,600
-5,200
| -3% | -$54K |
|
|
SIX
2116
CALL
DELISTED
Six Flags Entertainment Corp.
SIX
| $1.68M | ﹤0.01% |
64,700
-40,600
| -39% | -$1.05M |
|
2117
CALL
Concentrix
CNXC
$1.36B
| $1.68M | ﹤0.01% |
20,800
+10,100
| +94% | +$945K |
|
|
VTLE
2118
CALL
DELISTED
Vital Energy
VTLE
| $1.68M | ﹤0.01% |
37,200
-60,200
| -62% | -$2.72M |
|
2119
CALL
Black Stone Minerals
BSM
$3.11B
| $1.68M | ﹤0.01% |
105,200
-30,500
| -22% | -$488K |
|
2120
PUT
H&R Block
HRB
$5.18B
| $1.68M | ﹤0.01% |
52,600
+6,300
| +14% | +$204K |
|
2121
PUT
Nordic American Tanker
NAT
$1.37B
| $1.68M | ﹤0.01% |
456,900
+339,600
| +290% | +$1.23M |
|
2122
PUT
Equity Residential
EQR
$25.4B
| $1.68M | ﹤0.01% |
25,400
+4,000
| +19% | +$250K |
|
2123
CALL
Chegg
CHGG
$108M
| $1.67M | ﹤0.01% |
188,400
+140,800
| +296% | +$1.71M |
|
2124
PUT
LGI Homes
LGIH
$1.4B
| $1.67M | ﹤0.01% |
12,400
-2,900
| -19% | -$348K |
|
2125
CALL
Delek US
DK
$3.87B
| $1.67M | ﹤0.01% |
69,800
+19,900
| +40% | +$452K |
|
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.