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 | |
|---|---|---|---|---|---|---|
751
PUT
Microchip Technology
MCHP
$46.2B
| $13.9M | 0.01% |
165,700
-17,600
| -10% | -$1.4M |
|
|
P
752
CALL
Everpure Inc
P
$24.8B
| $13.8M | 0.01% |
541,800
+192,000
| +55% | +$5.18M |
|
753
PUT
Robinhood
HOOD
$93.8B
| $13.8M | 0.01% |
1,418,400
-501,500
| -26% | -$4.78M |
|
|
WWE
754
CALL
DELISTED
World Wrestling Entertainment
WWE
| $13.8M | 0.01% |
150,700
+24,600
| +20% | +$2.1M |
|
755
PUT
Simon Property Group
SPG
$73.4B
| $13.7M | 0.01% |
122,600
-3,600
| -3% | -$430K |
|
756
PUT
Cencora
COR
$58.5B
| $13.7M | 0.01% |
85,700
+54,400
| +174% | +$8.63M |
|
757
PUT
First Citizens BancShares
FCNCA
$24.1B
| $13.7M | 0.01% |
14,100
+7,400
| +110% | +$5.5M |
|
758
PUT
Constellation Energy
CEG
$98.2B
| $13.7M | 0.01% |
174,700
+143,200
| +455% | +$11.6M |
|
759
PUT
Kroger
KR
$35.3B
| $13.7M | 0.01% |
276,700
+69,400
| +33% | +$3.17M |
|
760
CALL
Mondelez International
MDLZ
$78.1B
| $13.7M | 0.01% |
195,800
+72,900
| +59% | +$4.83M |
|
761
CALL
International Flavors & Fragrances
IFF
$19.7B
| $13.6M | 0.01% |
148,100
+15,300
| +12% | +$1.52M |
|
762
CALL
HP
HPQ
$23B
| $13.5M | 0.01% |
461,600
+107,800
| +30% | +$3.09M |
|
|
DISH
763
PUT
DELISTED
DISH Network Corp.
DISH
| $13.5M | 0.01% |
1,450,000
+850,300
| +142% | +$10.7M |
|
764
VanEck Gold Miners ETF
GDX
$23.4B
| $13.5M | 0.01% |
416,884
+300,083
| +257% | +$9.08M |
|
|
CTRA
765
CALL
DELISTED
Coterra Energy
CTRA
| $13.4M | 0.01% |
548,100
-273,700
| -33% | -$6.73M |
|
|
766
PUT
HP
HPQ
$23B
| $13.4M | 0.01% |
458,100
-164,200
| -26% | -$4.71M |
|
|
PXD
767
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $13.4M | 0.01% |
65,700
-24,000
| -27% | -$5.16M |
|
768
PUT
Canadian Natural Resources
CNQ
$95.5B
| $13.3M | 0.01% |
482,400
+58,800
| +14% | +$1.67M |
|
769
Delta Air Lines
DAL
$54.9B
| $13.3M | 0.01% |
381,394
+361,090
| +1,778% | +$13.4M |
|
770
CALL
Celsius Holdings
CELH
$7.28B
| $13.3M | 0.01% |
429,000
+232,200
| +118% | +$7.33M |
|
771
CALL
Vanguard FTSE Europe ETF
VGK
$30.2B
| $13.3M | 0.01% |
182,000
-145,000
| -44% | -$8.66M |
|
772
PUT
Progressive
PGR
$119B
| $13.2M | 0.01% |
92,600
-59,400
| -39% | -$8.19M |
|
773
CALL
Lucid Motors
LCID
$2.65B
| $13.2M | 0.01% |
164,750
-69,920
| -30% | -$6.21M |
|
774
CALL
O'Reilly Automotive
ORLY
$71.7B
| $13.2M | 0.01% |
234,000
+25,500
| +12% | +$1.4M |
|
775
CALL
Ross Stores
ROST
$76.4B
| $13.2M | 0.01% |
124,200
+12,100
| +11% | +$1.36M |
|
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.