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 | |
|---|---|---|---|---|---|---|
901
CALL
CarGurus
CARG
$2.97B
| $10.1M | 0.01% |
538,400
+531,700
| +7,936% | +$9.05M |
|
902
DraftKings
DKNG
$11.4B
| $10M | 0.01% |
519,003
+518,915
| +589,676% | +$8.63M |
|
903
PUT
BJs Wholesale Club
BJ
$11.6B
| $10M | 0.01% |
132,000
+52,200
| +65% | +$3.79M |
|
904
CALL
Synchrony
SYF
$23.2B
| $10M | 0.01% |
344,100
+67,500
| +24% | +$2.27M |
|
905
PUT
Skyworks Solutions
SWKS
$8.99B
| $10M | 0.01% |
84,800
-184,300
| -68% | -$20.4M |
|
906
CALL
Enovix
ENVX
$964M
| $9.92M | 0.01% |
760,686
+44,457
| +6% | +$365K |
|
907
PUT
Live Nation Entertainment
LYV
$40.9B
| $9.92M | 0.01% |
141,700
+57,700
| +69% | +$4.23M |
|
908
CALL
Deckers Outdoor
DECK
$13.6B
| $9.89M | 0.01% |
132,000
+29,400
| +29% | +$2.05M |
|
909
CALL
Sherwin-Williams
SHW
$76.4B
| $9.89M | 0.01% |
44,000
-33,400
| -43% | -$7.64M |
|
910
CALL
VF Corp
VFC
$6.47B
| $9.89M | 0.01% |
431,600
+368,300
| +582% | +$9.68M |
|
911
CALL
HSBC
HSBC
$349B
| $9.87M | 0.01% |
289,200
-178,800
| -38% | -$6.42M |
|
912
Peabody Energy
BTU
$2.89B
| $9.87M | 0.01% |
385,446
+234,015
| +155% | +$6.22M |
|
|
FYBR
913
PUT
DELISTED
Frontier Communications
FYBR
| $9.86M | 0.01% |
433,100
+421,300
| +3,570% | +$11.3M |
|
|
MMP
914
CALL
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $9.83M | 0.01% |
181,200
+36,200
| +25% | +$1.92M |
|
915
CALL
Avis
CAR
$5.64B
| $9.82M | 0.01% |
50,400
+2,300
| +5% | +$462K |
|
916
CALL
Teck Resources
TECK
$29B
| $9.81M | 0.01% |
268,800
-280,200
| -51% | -$11.1M |
|
917
CALL
Allegro MicroSystems
ALGM
$9.39B
| $9.78M | 0.01% |
203,700
+9,400
| +5% | +$382K |
|
|
918
PUT
Synchrony
SYF
$23.2B
| $9.77M | 0.01% |
336,100
+159,700
| +91% | +$5.36M |
|
919
PUT
Molina Healthcare
MOH
$10.2B
| $9.76M | 0.01% |
36,500
-8,500
| -19% | -$2.44M |
|
920
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $9.73M | 0.01% |
30,900
-14,500
| -32% | -$4.35M |
|
921
CALL
Boston Scientific
BSX
$64.7B
| $9.71M | 0.01% |
194,200
-25,000
| -11% | -$1.18M |
|
922
CALL
Crocs
CROX
$6.57B
| $9.71M | 0.01% |
76,800
-83,000
| -52% | -$10M |
|
923
PUT
Thor Industries
THO
$3.9B
| $9.68M | 0.01% |
121,600
+16,900
| +16% | +$1.49M |
|
924
PUT
British American Tobacco
BTI
$128B
| $9.66M | 0.01% |
275,200
-53,800
| -16% | -$2.03M |
|
925
PUT
Idexx Laboratories
IDXX
$42.4B
| $9.65M | 0.01% |
19,300
-3,300
| -15% | -$1.58M |
|
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.