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 | |
|---|---|---|---|---|---|---|
2201
PUT
Chord Energy
CHRD
$7.79B
| $1.52M | ﹤0.01% |
9,900
-48,600
| -83% | -$7.05M |
|
2202
PUT
Meritage Homes
MTH
$4.87B
| $1.52M | ﹤0.01% |
21,400
+14,400
| +206% | +$904K |
|
2203
CALL
Westrock Coffee
WEST
$741M
| $1.52M | ﹤0.01% |
140,100
-94,300
| -40% | -$1.09M |
|
2204
Vista Energy
VIST
$7.75B
| $1.52M | ﹤0.01% |
62,962
+46,834
| +290% | +$1.02M |
|
2205
CALL
Metropolitan Bank Holding Corp
MCB
$1.13B
| $1.52M | ﹤0.01% |
43,700
-30,900
| -41% | -$930K |
|
2206
CALL
BioCryst Pharmaceuticals
BCRX
$2.37B
| $1.52M | ﹤0.01% |
215,400
+64,200
| +42% | +$515K |
|
|
ENLC
2207
CALL
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $1.51M | ﹤0.01% |
142,800
+60,200
| +73% | +$600K |
|
2208
US Bancorp
USB
$99.6B
| $1.51M | ﹤0.01% |
+45,739
| New | +$1.48M |
|
|
ARCH
2209
CALL
DELISTED
Arch Resources, Inc.
ARCH
| $1.51M | ﹤0.01% |
13,400
-5,300
| -28% | -$635K |
|
|
MRSH
2210
PUT
Marsh
MRSH
$86.3B
| $1.5M | ﹤0.01% |
8,000
+1,900
| +31% | +$337K |
|
2211
CALL
Otis Worldwide
OTIS
$27.4B
| $1.5M | ﹤0.01% |
16,900
-62,100
| -79% | -$5.23M |
|
2212
CALL
Alcon
ALC
$33.1B
| $1.5M | ﹤0.01% |
18,300
-37,800
| -67% | -$2.89M |
|
2213
Clorox
CLX
$11.6B
| $1.5M | ﹤0.01% |
+9,433
| New | +$1.52M |
|
2214
PUT
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.2M
| $1.5M | ﹤0.01% |
20,300
-47,200
| -70% | -$3.44M |
|
2215
CALL
SPS Commerce
SPSC
$2.25B
| $1.5M | ﹤0.01% |
+7,800
| New | +$1.26M |
|
2216
TriNet
TNET
$2.84B
| $1.5M | ﹤0.01% |
15,743
+15,348
| +3,886% | +$1.4M |
|
2217
iShares iBoxx $ Investment Grade Corporate Bond ETF
LQD
$34.7B
| $1.49M | ﹤0.01% |
+13,790
| New | +$1.49M |
|
|
RCM
2218
CALL
DELISTED
R1 RCM Inc. Common Stock
RCM
| $1.49M | ﹤0.01% |
80,600
-190,800
| -70% | -$3.1M |
|
|
CYBR
2219
PUT
DELISTED
CyberArk
CYBR
| $1.49M | ﹤0.01% |
9,500
-6,100
| -39% | -$873K |
|
2220
PUT
HF Sinclair
DINO
$15.9B
| $1.49M | ﹤0.01% |
33,300
+5,800
| +21% | +$253K |
|
2221
CALL
Republic Services
RSG
$66.7B
| $1.49M | ﹤0.01% |
9,700
+2,700
| +39% | +$386K |
|
2222
Intellia Therapeutics
NTLA
$1.5B
| $1.48M | ﹤0.01% |
36,386
+30,490
| +517% | +$1.24M |
|
2223
PUT
Universal Health Services
UHS
$9.43B
| $1.48M | ﹤0.01% |
9,400
+2,800
| +42% | +$391K |
|
2224
CALL
First Horizon
FHN
$12.1B
| $1.48M | ﹤0.01% |
131,300
+85,400
| +186% | +$1.14M |
|
2225
PUT
Zebra Technologies
ZBRA
$12.4B
| $1.48M | ﹤0.01% |
5,000
-27,900
| -85% | -$7.83M |
|
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.