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 | |
|---|---|---|---|---|---|---|
1476
CALL
ZipRecruiter
ZIP
$318M
| $3.79M | ﹤0.01% |
237,700
+90,400
| +61% | +$1.63M |
|
1477
CALL
Invesco S&P SmallCap Low Volatility ETF
XSLV
$249M
| $3.79M | ﹤0.01% |
53,500
-26,900
| -33% | -$1.22M |
|
1478
Unity
U
$12.5B
| $3.77M | ﹤0.01% |
116,322
+107,731
| +1,254% | +$3.46M |
|
1479
The Mosaic Company
MOS
$7.09B
| $3.77M | ﹤0.01% |
82,184
+71,589
| +676% | +$3.47M |
|
1480
United States Oil Fund
USO
$2.45B
| $3.76M | ﹤0.01% |
56,667
-95,866
| -63% | -$6.39M |
|
|
PACW
1481
PUT
DELISTED
PacWest Bancorp
PACW
| $3.76M | ﹤0.01% |
386,500
+358,900
| +1,300% | +$7.98M |
|
1482
ServiceNow
NOW
$102B
| $3.75M | ﹤0.01% |
+40,405
| New | +$3.52M |
|
|
FTCH
1483
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $3.75M | ﹤0.01% |
764,805
+406,992
| +114% | +$2.21M |
|
1484
PUT
Dutch Bros
BROS
$8.78B
| $3.74M | ﹤0.01% |
118,300
+52,400
| +80% | +$1.77M |
|
1485
CALL
BridgeBio Pharma
BBIO
$16.5B
| $3.74M | ﹤0.01% |
225,400
+146,200
| +185% | +$1.7M |
|
1486
CALL
Hyatt Hotels
H
$17.6B
| $3.73M | ﹤0.01% |
33,400
+29,500
| +756% | +$3.23M |
|
1487
PUT
Consolidated Edison
ED
$41.6B
| $3.73M | ﹤0.01% |
39,000
-8,900
| -19% | -$833K |
|
1488
CALL
State Street
STT
$50.9B
| $3.72M | ﹤0.01% |
49,200
+17,400
| +55% | +$1.47M |
|
1489
CALL
Sun Communities
SUI
$15B
| $3.72M | ﹤0.01% |
26,400
+24,200
| +1,100% | +$3.54M |
|
1490
Rio Tinto
RIO
$148B
| $3.72M | ﹤0.01% |
54,173
+45,364
| +515% | +$3.29M |
|
|
VMW
1491
DELISTED
VMware, Inc
VMW
| $3.71M | ﹤0.01% |
29,705
+25,088
| +543% | +$3.01M |
|
1492
CALL
TripAdvisor
TRIP
$1.59B
| $3.71M | ﹤0.01% |
186,600
-17,900
| -9% | -$383K |
|
1493
CALL
Vistra
VST
$55.1B
| $3.69M | ﹤0.01% |
153,700
-61,300
| -29% | -$1.42M |
|
1494
PUT
Enovix
ENVX
$862M
| $3.68M | ﹤0.01% |
282,171
-87,886
| -24% | -$722K |
|
1495
PUT
Starwood Property Trust
STWD
$6.12B
| $3.66M | ﹤0.01% |
207,000
+123,100
| +147% | +$2.38M |
|
1496
PUT
Samsara
IOT
$19.3B
| $3.64M | ﹤0.01% |
184,400
+137,600
| +294% | +$2.18M |
|
1497
CALL
Aptiv
APTV
$12B
| $3.63M | ﹤0.01% |
32,400
+12,600
| +64% | +$1.39M |
|
1498
Direxion Daily 20+ Year Treasury Bull 3X ETF
TMF
$2.22B
| $3.63M | ﹤0.01% |
40,912
+2,337
| +6% | +$203K |
|
1499
CALL
Corsair Gaming
CRSR
$1.05B
| $3.63M | ﹤0.01% |
197,900
+18,700
| +10% | +$304K |
|
|
DQ
1500
PUT
Daqo New Energy
DQ
$790M
| $3.62M | ﹤0.01% |
77,200
+6,500
| +9% | +$299K |
|
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.