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 | |
|---|---|---|---|---|---|---|
6176
PUT
Vanguard FTSE Developed Markets ETF
VEA
$229B
| $40K | ﹤0.01% |
900
-3,800
| -81% | -$169K |
|
6177
State Street SPDR S&P Oil & Gas Equipment & Services ETF
XES
$374M
| $40K | ﹤0.01% |
545
-923
| -63% | -$75.8K |
|
6178
CALL
Astrana Health
ASTH
$1.76B
| $40K | ﹤0.01% |
1,100
-1,900
| -63% | -$66.5K |
|
|
EBET
6179
CALL
DELISTED
EBET, INC. Common Stock
EBET
| $40K | ﹤0.01% |
3,317
+2,604
| +365% | +$43.7K |
|
6180
BARK
BARK
$81.8M
| $39K | ﹤0.01% |
1,357
-145
| -10% | -$4.6K |
|
6181
PUT
Bruker
BRKR
$9.57B
| $39K | ﹤0.01% |
500
+200
| +67% | +$14.4K |
|
|
BURU
6182
PUT
DELISTED
NUBURU INC
BURU
| $39K | ﹤0.01% |
75
+16
| +27% | +$20K |
|
6183
CALL
Camtek
CAMT
$6.18B
| $39K | ﹤0.01% |
1,400
-1,200
| -46% | -$32K |
|
|
CIO
6184
PUT
DELISTED
City Office REIT
CIO
| $39K | ﹤0.01% |
5,700
+5,400
| +1,800% | +$45.6K |
|
6185
CALL
Commault Systems
CVLT
$4.88B
| $39K | ﹤0.01% |
+700
| New | +$41.7K |
|
6186
PUT
Douglas Elliman
DOUG
$154M
| $39K | ﹤0.01% |
13,440
+5,460
| +68% | +$21.8K |
|
6187
CALL
Diana Shipping
DSX
$302M
| $39K | ﹤0.01% |
15,294
-25,949
| -63% | -$83.8K |
|
6188
FirstService
FSV
$6.48B
| $39K | ﹤0.01% |
+277
| New | +$38.2K |
|
|
GAN
6189
CALL
DELISTED
GAN Ltd
GAN
| $39K | ﹤0.01% |
30,600
+16,200
| +113% | +$29.5K |
|
6190
PUT
Gentex
GNTX
$4.97B
| $39K | ﹤0.01% |
1,400
+1,200
| +600% | +$33.8K |
|
6191
PUT
InvenTrust Properties
IVT
$2.76B
| $39K | ﹤0.01% |
1,700
+1,600
| +1,600% | +$37.8K |
|
6192
iShares US Consumer Discretionary ETF
IYC
$1.17B
| $39K | ﹤0.01% |
612
+412
| +206% | +$25.8K |
|
6193
CALL
MasterCraft Boat Holdings
MCFT
$579M
| $39K | ﹤0.01% |
1,300
+300
| +30% | +$9.32K |
|
6194
MillerKnoll
MLKN
$1.53B
| $39K | ﹤0.01% |
1,928
-5,565
| -74% | -$125K |
|
6195
CALL
MakeMyTrip
MMYT
$5.36B
| $39K | ﹤0.01% |
1,600
-200
| -11% | -$5.32K |
|
|
NFGC
6196
New Found Gold
NFGC
$522M
| $39K | ﹤0.01% |
7,941
+603
| +8% | +$2.39K |
|
6197
CALL
Nomad Foods
NOMD
$1.66B
| $39K | ﹤0.01% |
2,100
+1,200
| +133% | +$21.2K |
|
6198
PUT
OFS Capital
OFS
$45M
| $39K | ﹤0.01% |
3,800
+2,300
| +153% | +$23.2K |
|
6199
CALL
Paylocity
PCTY
$7.38B
| $39K | ﹤0.01% |
200
-200
| -50% | -$39.4K |
|
6200
Procept Biorobotics
PRCT
$1.06B
| $39K | ﹤0.01% |
+1,404
| New | +$49.5K |
|
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.