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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
ARNC
1101
CALL
DELISTED
Arconic Corporation
ARNC
| $6.88M | 0.01% |
262,500
+252,400
| +2,499% | +$6.2M |
|
|
MMP
1102
PUT
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $6.87M | 0.01% |
126,600
+79,900
| +171% | +$4.23M |
|
1103
PUT
Manchester United
MANU
$3.85B
| $6.87M | 0.01% |
310,100
+79,200
| +34% | +$1.8M |
|
1104
PUT
Annaly Capital Management
NLY
$16.7B
| $6.85M | 0.01% |
358,600
-90,200
| -20% | -$1.9M |
|
1105
Take-Two Interactive
TTWO
$42.7B
| $6.82M | 0.01% |
+57,207
| New | +$6.38M |
|
1106
PUT
Hertz
HTZ
$603M
| $6.79M | 0.01% |
416,600
+279,000
| +203% | +$4.87M |
|
1107
CALL
PBF Energy
PBF
$7.33B
| $6.78M | 0.01% |
156,400
-34,800
| -18% | -$1.47M |
|
1108
PUT
TransDigm Group
TDG
$67.9B
| $6.78M | 0.01% |
9,200
+4,900
| +114% | +$3.5M |
|
1109
PUT
Air Products & Chemicals
APD
$65.5B
| $6.78M | 0.01% |
23,600
-66,700
| -74% | -$19.5M |
|
1110
GSK
GSK
$102B
| $6.75M | 0.01% |
189,576
-95,562
| -34% | -$3.34M |
|
1111
PUT
argenx
ARGX
$57.8B
| $6.74M | 0.01% |
18,100
+8,300
| +85% | +$3.07M |
|
1112
CALL
Dutch Bros
BROS
$8.78B
| $6.74M | 0.01% |
213,100
+160,900
| +308% | +$5.45M |
|
1113
Vanguard Information Technology ETF
VGT
$140B
| $6.73M | 0.01% |
139,592
+118,832
| +572% | +$5.25M |
|
1114
PUT
Pan American Silver
PAAS
$18.6B
| $6.72M | 0.01% |
369,200
+42,000
| +13% | +$722K |
|
1115
CALL
Henry Schein
HSIC
$9.63B
| $6.71M | 0.01% |
82,300
-3,100
| -4% | -$253K |
|
1116
PUT
Paychex
PAYX
$39.4B
| $6.69M | 0.01% |
58,400
-8,700
| -13% | -$990K |
|
1117
CALL
Huntsman Corp
HUN
$2.25B
| $6.68M | 0.01% |
244,300
+167,800
| +219% | +$5M |
|
1118
CALL
Dynatrace
DT
$11.8B
| $6.68M | 0.01% |
157,900
+42,300
| +37% | +$1.71M |
|
1119
PUT
Alexandria Real Estate Equities
ARE
$8.73B
| $6.67M | 0.01% |
53,100
+45,400
| +590% | +$6.67M |
|
1120
CALL
Otis Worldwide
OTIS
$27.2B
| $6.67M | 0.01% |
79,000
+67,500
| +587% | +$5.59M |
|
1121
PUT
Metropolitan Bank Holding Corp
MCB
$1.13B
| $6.66M | 0.01% |
196,500
+196,200
| +65,400% | +$10.2M |
|
1122
PUT
Canadian Solar
CSIQ
$997M
| $6.65M | 0.01% |
167,100
-98,800
| -37% | -$3.92M |
|
1123
CALL
Equinix
EQIX
$102B
| $6.63M | 0.01% |
9,200
+4,700
| +104% | +$3.31M |
|
1124
CALL
Carrier Global
CARR
$57.4B
| $6.61M | 0.01% |
144,500
+64,600
| +81% | +$2.89M |
|
1125
PUT
Aflac
AFL
$63.3B
| $6.61M | 0.01% |
102,400
-4,000
| -4% | -$274K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.