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 | |
|---|---|---|---|---|---|---|
776
PUT
XPeng
XPEV
$12B
| $13.2M | 0.01% |
1,186,300
+484,700
| +69% | +$4.68M |
|
|
DFS
777
CALL
DELISTED
Discover Financial Services
DFS
| $13.1M | 0.01% |
132,700
+46,400
| +54% | +$4.97M |
|
778
CALL
NXP Semiconductors
NXPI
$68.9B
| $13.1M | 0.01% |
70,300
-19,200
| -21% | -$3.42M |
|
779
CALL
Dropbox
DBX
$6.52B
| $13.1M | 0.01% |
604,200
-101,800
| -14% | -$2.23M |
|
780
PUT
iShares Core MSCI Emerging Markets ETF
IEMG
$151B
| $13.1M | 0.01% |
292,100
+189,600
| +185% | +$9.3M |
|
|
DFS
781
PUT
DELISTED
Discover Financial Services
DFS
| $13M | 0.01% |
131,600
+64,500
| +96% | +$6.9M |
|
782
PUT
BioNTech
BNTX
$23.2B
| $12.9M | 0.01% |
103,700
-16,800
| -14% | -$2.31M |
|
783
CALL
Archer Daniels Midland
ADM
$42.3B
| $12.8M | 0.01% |
161,300
-72,900
| -31% | -$5.95M |
|
784
PUT
Stellantis
STLA
$16.5B
| $12.8M | 0.01% |
705,100
+381,300
| +118% | +$6.37M |
|
785
CALL
AB InBev
BUD
$155B
| $12.8M | 0.01% |
192,100
+85,000
| +79% | +$5.14M |
|
786
PUT
TJX Companies
TJX
$169B
| $12.8M | 0.01% |
163,500
-155,300
| -49% | -$12.2M |
|
787
PUT
Agnico Eagle Mines
AEM
$71.5B
| $12.8M | 0.01% |
251,200
-23,400
| -9% | -$1.2M |
|
|
SCHW
788
Charles Schwab
SCHW
$178B
| $12.7M | 0.01% |
+242,679
| New | +$17.8M |
|
789
CALL
Lyft
LYFT
$5.2B
| $12.6M | 0.01% |
1,360,400
-589,500
| -30% | -$7.12M |
|
790
CALL
Whirlpool
WHR
$2.31B
| $12.5M | 0.01% |
94,900
-79,100
| -45% | -$11.3M |
|
|
VMW
791
PUT
DELISTED
VMware, Inc
VMW
| $12.5M | 0.01% |
99,900
+47,000
| +89% | +$5.65M |
|
|
BNY
792
PUT
Bank of New York Mellon
BNY
$108B
| $12.4M | 0.01% |
273,600
+171,000
| +167% | +$8.29M |
|
793
CALL
Capri Holdings
CPRI
$1.79B
| $12.4M | 0.01% |
264,300
+208,100
| +370% | +$11.2M |
|
794
PUT
Post Holdings
POST
$4.04B
| $12.4M | 0.01% |
137,500
+38,900
| +39% | +$3.54M |
|
795
PUT
Wingstop
WING
$3.67B
| $12.3M | 0.01% |
67,100
+29,100
| +77% | +$4.78M |
|
796
CALL
Transocean
RIG
$5.93B
| $12.3M | 0.01% |
1,935,400
+321,800
| +20% | +$2.07M |
|
797
CALL
GE HealthCare
GEHC
$28.1B
| $12.3M | 0.01% |
+149,800
| New | +$10.7M |
|
|
AY
798
CALL
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $12.3M | 0.01% |
415,500
+391,100
| +1,603% | +$10.6M |
|
799
Newmont
NEM
$99.6B
| $12.3M | 0.01% |
249,993
+222,418
| +807% | +$10.8M |
|
|
XYZ
800
Block Inc
XYZ
$45.3B
| $12.3M | 0.01% |
178,503
-47,434
| -21% | -$3.55M |
|
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.