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 | |
|---|---|---|---|---|---|---|
2701
CALL
IMAX
IMAX
$2.38B
| $898K | ﹤0.01% |
52,900
+2,300
| +5% | +$43.6K |
|
2702
NOV
NOV
$7.45B
| $898K | ﹤0.01% |
+56,018
| New | +$913K |
|
2703
PUT
Vermilion Energy
VET
$1.73B
| $898K | ﹤0.01% |
72,200
-26,500
| -27% | -$327K |
|
2704
PUT
Expeditors International
EXPD
$22.9B
| $896K | ﹤0.01% |
7,400
+1,300
| +21% | +$148K |
|
|
NEWR
2705
CALL
DELISTED
New Relic, Inc.
NEWR
| $896K | ﹤0.01% |
13,700
+3,200
| +30% | +$231K |
|
2706
PUT
Arrowhead Research
ARWR
$12.1B
| $895K | ﹤0.01% |
25,100
+17,300
| +222% | +$596K |
|
2707
PUT
SSR Mining
SSRM
$5.57B
| $893K | ﹤0.01% |
63,000
+5,400
| +9% | +$81.7K |
|
2708
CALL
Bankunited
BKU
$3.38B
| $892K | ﹤0.01% |
41,400
+36,700
| +781% | +$755K |
|
2709
PUT
Blue Owl Capital
OWL
$6.39B
| $892K | ﹤0.01% |
76,600
-47,400
| -38% | -$510K |
|
2710
CALL
WEX
WEX
$6.11B
| $892K | ﹤0.01% |
4,900
-1,400
| -22% | -$248K |
|
|
TUZ
2711
PUT
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $892K | ﹤0.01% |
9,700
+8,900
| +1,113% | +$818K |
|
2712
CALL
ESAB
ESAB
$5.25B
| $891K | ﹤0.01% |
+13,400
| New | +$813K |
|
2713
CALL
Jacobs Solutions
J
$15.9B
| $891K | ﹤0.01% |
9,067
-17,409
| -66% | -$1.66M |
|
2714
CALL
AerCap
AER
$23.9B
| $889K | ﹤0.01% |
14,000
-2,200
| -14% | -$127K |
|
2715
CALL
Iridium Communications
IRDM
$4.85B
| $888K | ﹤0.01% |
14,300
-31,700
| -69% | -$1.96M |
|
2716
Direxion Daily Junior Gold Miners Index Bear 2X ETF
JDST
$30.4M
| $888K | ﹤0.01% |
627
+149
| +31% | +$182K |
|
2717
State Street SPDR S&P Metals & Mining ETF
XME
$3.91B
| $888K | ﹤0.01% |
+17,479
| New | +$858K |
|
2718
Copart
CPRT
$25.9B
| $884K | ﹤0.01% |
19,402
+6,978
| +56% | +$289K |
|
2719
Nice
NICE
$5.29B
| $883K | ﹤0.01% |
4,277
-24,472
| -85% | -$5.05M |
|
|
TELL
2720
CALL
DELISTED
Tellurian Inc.
TELL
| $882K | ﹤0.01% |
625,600
-226,800
| -27% | -$305K |
|
2721
PUT
Zevra Therapeutics
ZVRA
$563M
| $881K | ﹤0.01% |
172,900
-55,900
| -24% | -$301K |
|
2722
CALL
Ternium
TX
$9.29B
| $880K | ﹤0.01% |
22,200
-19,300
| -47% | -$778K |
|
2723
KBR
KBR
$4.68B
| $879K | ﹤0.01% |
+13,514
| New | +$806K |
|
|
KDNY
2724
PUT
DELISTED
Chinook Therapeutics, Inc. Common Stock
KDNY
| $879K | ﹤0.01% |
22,900
+3,400
| +17% | +$87.3K |
|
|
SIX
2725
PUT
DELISTED
Six Flags Entertainment Corp.
SIX
| $878K | ﹤0.01% |
33,800
-64,500
| -66% | -$1.67M |
|
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.