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 | |
|---|---|---|---|---|---|---|
2276
CALL
Sphere Entertainment
SPHR
$4.88B
| $1.39M | ﹤0.01% |
51,100
+46,900
| +1,117% | +$1.55M |
|
2277
CALL
Invesco Mortgage Capital
IVR
$776M
| $1.39M | ﹤0.01% |
121,100
+34,100
| +39% | +$365K |
|
2278
PUT
Lumentum
LITE
$59.4B
| $1.39M | ﹤0.01% |
24,500
-8,200
| -25% | -$410K |
|
2279
CALL
Opko Health
OPK
$921M
| $1.39M | ﹤0.01% |
639,600
+181,000
| +39% | +$283K |
|
2280
CALL
FLEX LNG
FLNG
$1.67B
| $1.39M | ﹤0.01% |
45,400
+5,000
| +12% | +$160K |
|
2281
Academy Sports + Outdoors
ASO
$2.89B
| $1.39M | ﹤0.01% |
25,642
+18,111
| +240% | +$1.04M |
|
2282
Jacobs Solutions
J
$15.9B
| $1.39M | ﹤0.01% |
+14,085
| New | +$1.34M |
|
|
EMBK
2283
PUT
DELISTED
Embark Technology, Inc. Common Stock
EMBK
| $1.39M | ﹤0.01% |
484,300
+36,500
| +8% | +$102K |
|
2284
Revolve Group
RVLV
$1.79B
| $1.38M | ﹤0.01% |
+84,441
| New | +$1.57M |
|
2285
Generac Holdings
GNRC
$11.9B
| $1.38M | ﹤0.01% |
9,280
+3,797
| +69% | +$433K |
|
2286
CALL
Verra Mobility
VRRM
$615M
| $1.38M | ﹤0.01% |
70,100
-85,100
| -55% | -$1.5M |
|
|
TGH
2287
CALL
DELISTED
Textainer Group Holdings limited
TGH
| $1.38M | ﹤0.01% |
35,100
-48,200
| -58% | -$1.76M |
|
2288
PUT
Macerich
MAC
$7.32B
| $1.38M | ﹤0.01% |
122,600
-29,100
| -19% | -$296K |
|
2289
PUT
Omega Healthcare
OHI
$15.4B
| $1.38M | ﹤0.01% |
45,000
-400
| -0.9% | -$11.6K |
|
2290
CALL
Sweetgreen
SG
$713M
| $1.38M | ﹤0.01% |
107,800
+61,500
| +133% | +$569K |
|
2291
PUT
Plains All American Pipeline
PAA
$17.4B
| $1.37M | ﹤0.01% |
97,400
+9,300
| +11% | +$123K |
|
2292
CALL
Equity Residential
EQR
$25.4B
| $1.37M | ﹤0.01% |
20,800
-29,900
| -59% | -$1.87M |
|
|
MRTX
2293
PUT
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $1.37M | ﹤0.01% |
38,000
+700
| +2% | +$28.8K |
|
2294
CALL
Aecom
ACM
$9.07B
| $1.37M | ﹤0.01% |
16,200
+8,100
| +100% | +$664K |
|
2295
CALL
Asbury Automotive
ABG
$4.19B
| $1.37M | ﹤0.01% |
5,700
-2,500
| -30% | -$526K |
|
2296
PUT
RBC Bearings
RBC
$18.8B
| $1.37M | ﹤0.01% |
+6,300
| New | +$1.37M |
|
2297
CALL
LPL Financial
LPLA
$26.3B
| $1.37M | ﹤0.01% |
6,300
+700
| +13% | +$140K |
|
2298
PUT
Saia
SAIA
$11.3B
| $1.37M | ﹤0.01% |
4,000
-1,800
| -31% | -$521K |
|
2299
CALL
SiriusXM
SIRI
$10B
| $1.37M | ﹤0.01% |
30,210
+12,040
| +66% | +$455K |
|
2300
PUT
SBA Communications
SBAC
$18.4B
| $1.37M | ﹤0.01% |
5,900
+3,200
| +119% | +$765K |
|
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.