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 | |
|---|---|---|---|---|---|---|
1376
PUT
IQVIA
IQV
$34.9B
| $4.46M | ﹤0.01% |
22,400
+9,000
| +67% | +$1.92M |
|
|
VTLE
1377
CALL
DELISTED
Vital Energy
VTLE
| $4.43M | ﹤0.01% |
97,400
+13,600
| +16% | +$679K |
|
1378
CALL
Fluor
FLR
$7.42B
| $4.43M | ﹤0.01% |
143,300
+59,800
| +72% | +$2.06M |
|
|
DAY
1379
PUT
DELISTED
Dayforce
DAY
| $4.43M | ﹤0.01% |
+60,500
| New | +$4.29M |
|
1380
PUT
Paycom
PAYC
$6.72B
| $4.41M | ﹤0.01% |
14,500
-19,000
| -57% | -$5.72M |
|
1381
PUT
Cardinal Health
CAH
$53.6B
| $4.4M | ﹤0.01% |
58,300
-51,900
| -47% | -$3.92M |
|
1382
PUT
ZTO Express
ZTO
$18.3B
| $4.38M | ﹤0.01% |
152,700
+117,200
| +330% | +$3.2M |
|
1383
PUT
Vornado Realty Trust
VNO
$7.55B
| $4.36M | ﹤0.01% |
283,700
+108,400
| +62% | +$2.19M |
|
1384
CALL
PAR Technology
PAR
$648M
| $4.35M | ﹤0.01% |
128,000
-45,300
| -26% | -$1.51M |
|
1385
PUT
Invesco S&P SmallCap Low Volatility ETF
XSLV
$249M
| $4.34M | ﹤0.01% |
77,500
-180,500
| -70% | -$8.18M |
|
|
JPGE
1386
CALL
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $4.34M | ﹤0.01% |
79,600
-2,700
| -3% | -$147K |
|
1387
CALL
Quest Diagnostics
DGX
$25.1B
| $4.34M | ﹤0.01% |
30,700
-10,000
| -25% | -$1.43M |
|
|
NOVA
1388
PUT
DELISTED
Sunnova Energy
NOVA
| $4.33M | ﹤0.01% |
277,500
+169,500
| +157% | +$2.96M |
|
1389
PUT
Pacific Biosciences
PACB
$416M
| $4.33M | ﹤0.01% |
374,300
-11,400
| -3% | -$113K |
|
1390
CALL
Pan American Silver
PAAS
$18.8B
| $4.33M | ﹤0.01% |
237,900
-91,900
| -28% | -$1.58M |
|
1391
CALL
Levi Strauss
LEVI
$9.49B
| $4.33M | ﹤0.01% |
237,400
+173,000
| +269% | +$2.97M |
|
1392
CALL
UiPath
PATH
$5.53B
| $4.33M | ﹤0.01% |
246,400
+172,700
| +234% | +$2.61M |
|
1393
CALL
DigitalOcean
DOCN
$15B
| $4.32M | ﹤0.01% |
110,400
-97,000
| -47% | -$3.05M |
|
1394
PUT
AngloGold Ashanti
AU
$40.7B
| $4.3M | ﹤0.01% |
177,800
-305,100
| -63% | -$6.18M |
|
|
FSR
1395
PUT
DELISTED
Fisker Inc.
FSR
| $4.3M | ﹤0.01% |
700,100
+142,800
| +26% | +$984K |
|
1396
Strategy Inc
MSTR
$34.1B
| $4.29M | ﹤0.01% |
146,940
+122,780
| +508% | +$3M |
|
|
JPGE
1397
PUT
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $4.29M | ﹤0.01% |
78,900
+57,000
| +260% | +$3.1M |
|
1398
CALL
Tilray
TLRY
$478M
| $4.29M | ﹤0.01% |
169,600
-236,250
| -58% | -$6.74M |
|
1399
CALL
iQIYI
IQ
$1.19B
| $4.29M | ﹤0.01% |
589,100
-297,800
| -34% | -$2.04M |
|
|
SPWR
1400
CALL
DELISTED
SunPower Corporation Common Stock
SPWR
| $4.28M | ﹤0.01% |
309,400
+57,600
| +23% | +$903K |
|
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.