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 | Miscellaneous | 98.51% |
| 2 | Technology | 0.42% |
| 3 | Consumer Discretionary | 0.2% |
| 4 | Healthcare | 0.17% |
| 5 | Industrials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
876
PUT
Franco-Nevada
FNV
$51.3B
| $10.4M | 0.01% |
71,500
+19,900
| +39% | +$2.77M |
|
877
PUT
Capri Holdings
CPRI
$1.54B
| $10.4M | 0.01% |
221,700
+104,500
| +89% | +$5.61M |
|
878
CALL
Hasbro
HAS
$13.1B
| $10.4M | 0.01% |
193,400
+24,600
| +15% | +$1.41M |
|
|
SCIU
879
PUT
DELISTED
Global X Scientific Beta US ETF
SCIU
| $10.4M | 0.01% |
451,500
+178,500
| +65% | +$4.1M |
|
|
P
880
PUT
Everpure Inc
P
$33.1B
| $10.4M | 0.01% |
406,400
-4,000
| -1% | -$108K |
|
881
CALL
Microchip Technology
MCHP
$40.3B
| $10.4M | 0.01% |
123,700
-43,200
| -26% | -$3.44M |
|
882
CALL
Wolfspeed
WOLF
$1.47B
| $10.4M | 0.01% |
159,400
+6,600
| +4% | +$482K |
|
883
PUT
SoFi Technologies
SOFI
$23.5B
| $10.3M | 0.01% |
1,703,900
+416,100
| +32% | +$2.52M |
|
884
CALL
WillScot Mobile Mini Holdings
WSC
$3.62B
| $10.3M | 0.01% |
220,400
+130,200
| +144% | +$6.27M |
|
885
CALL
Madrigal Pharmaceuticals
MDGL
$12.5B
| $10.3M | 0.01% |
42,600
-6,800
| -14% | -$1.85M |
|
886
PUT
Cummins
CMI
$77.2B
| $10.3M | 0.01% |
43,200
+1,200
| +3% | +$293K |
|
887
ARK Innovation ETF
ARKK
$6.44B
| $10.3M | 0.01% |
255,782
+249,670
| +4,085% | +$9.57M |
|
888
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$446M
| $10.3M | 0.01% |
146,900
-101,000
| -41% | -$7.11M |
|
889
CALL
VICI Properties
VICI
$28B
| $10.3M | 0.01% |
315,700
+109,300
| +53% | +$3.62M |
|
890
PUT
ArcelorMittal
MT
$59.4B
| $10.3M | 0.01% |
340,400
+183,300
| +117% | +$5.46M |
|
891
PUT
HubSpot
HUBS
$12.3B
| $10.2M | 0.01% |
23,900
-17,800
| -43% | -$6.5M |
|
892
CALL
Robinhood
HOOD
$110B
| $10.2M | 0.01% |
1,052,000
-623,600
| -37% | -$5.95M |
|
893
PUT
AB InBev
BUD
$158B
| $10.2M | 0.01% |
152,900
+23,600
| +18% | +$1.43M |
|
894
Advanced Micro Devices
AMD
$780B
| $10.2M | 0.01% |
103,993
+100,395
| +2,790% | +$8.17M |
|
895
PUT
United States Natural Gas Fund
UNG
$572M
| $10.2M | 0.01% |
367,150
+258,500
| +238% | +$9.39M |
|
896
PUT
Knight Transportation
KNX
$11.7B
| $10.2M | 0.01% |
179,400
+900
| +0.5% | +$51.5K |
|
|
GTM
897
PUT
ZoomInfo Technologies
GTM
$1.2B
| $10.2M | 0.01% |
410,800
+296,500
| +259% | +$7.61M |
|
898
CALL
Cadence Design Systems
CDNS
$80.6B
| $10.1M | 0.01% |
48,200
+4,300
| +10% | +$813K |
|
899
CALL
Kroger
KR
$35.9B
| $10.1M | 0.01% |
204,600
-77,600
| -27% | -$3.55M |
|
900
Apollo Global Management
APO
$78.9B
| $10.1M | 0.01% |
+159,704
| New | +$10.7M |
|
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's Q1 2023 filing shows 1,536 new, 3,663 increased, 3,631 reduced and 1,728 closed positions. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M. The largest sale was Amazon, an estimated $189M.
By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 1,728 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.