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 | |
|---|---|---|---|---|---|---|
1151
CALL
Novavax
NVAX
$1.69B
| $6.35M | 0.01% |
915,800
+50,500
| +6% | +$465K |
|
1152
CALL
Gold Fields
GFI
$42.2B
| $6.34M | 0.01% |
476,400
+284,800
| +149% | +$3.17M |
|
1153
PUT
Veeva Systems
VEEV
$44.5B
| $6.32M | 0.01% |
34,400
-43,900
| -56% | -$7.49M |
|
1154
PUT
Whirlpool
WHR
$2.56B
| $6.31M | 0.01% |
47,800
+5,100
| +12% | +$726K |
|
1155
CALL
Genuine Parts
GPC
$19B
| $6.31M | 0.01% |
37,700
-7,900
| -17% | -$1.33M |
|
1156
CALL
T. Rowe Price
TROW
$23.4B
| $6.3M | 0.01% |
55,800
+11,800
| +27% | +$1.35M |
|
|
HCP
1157
PUT
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $6.28M | 0.01% |
214,400
+119,000
| +125% | +$3.55M |
|
1158
CALL
Realty Income
O
$58B
| $6.28M | 0.01% |
99,400
-99,400
| -50% | -$6.44M |
|
1159
PUT
Hormel Foods
HRL
$11.9B
| $6.27M | 0.01% |
157,200
+141,000
| +870% | +$6.09M |
|
1160
Invesco NASDAQ 100 ETF
QQQM
$105B
| $6.27M | 0.01% |
+47,489
| New | +$5.76M |
|
|
HZNP
1161
PUT
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $6.25M | 0.01% |
57,300
-296,600
| -84% | -$32.8M |
|
1162
PUT
Cadence Design Systems
CDNS
$80.6B
| $6.24M | 0.01% |
29,700
-44,700
| -60% | -$8.45M |
|
1163
PUT
Bank of Montreal
BMO
$122B
| $6.24M | 0.01% |
70,000
+28,500
| +69% | +$2.7M |
|
|
LAC
1164
CALL
DELISTED
Lithium Americas Corp. Common Shares
LAC
| $6.22M | 0.01% |
286,100
+119,500
| +72% | +$2.64M |
|
1165
PUT
BRC Group Holdings
RILY
$283M
| $6.22M | 0.01% |
219,200
+114,700
| +110% | +$4.34M |
|
|
UCD
1166
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $6.21M | 0.01% |
162,100
-91,500
| -36% | -$3.51M |
|
1167
PUT
Penske Automotive Group
PAG
$14.4B
| $6.2M | 0.01% |
43,700
-6,200
| -12% | -$825K |
|
1168
CALL
EPAM Systems
EPAM
$6.04B
| $6.19M | 0.01% |
20,700
-13,100
| -39% | -$4.22M |
|
1169
PUT
Marqeta
MQ
$1.73B
| $6.16M | 0.01% |
337,000
+301,825
| +858% | +$6.73M |
|
1170
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$302M
| $6.14M | 0.01% |
+219,663
| New | +$6.44M |
|
1171
CALL
Melco Resorts & Entertainment
MLCO
$1.98B
| $6.13M | 0.01% |
481,200
-95,400
| -17% | -$1.23M |
|
1172
CALL
Arthur J. Gallagher & Co
AJG
$67.3B
| $6.12M | 0.01% |
32,000
+8,100
| +34% | +$1.54M |
|
1173
CALL
Match Group
MTCH
$9.61B
| $6.12M | 0.01% |
159,300
-220,700
| -58% | -$9.63M |
|
1174
PUT
Ambarella
AMBA
$2.78B
| $6.1M | 0.01% |
78,800
-15,000
| -16% | -$1.28M |
|
1175
Shopify
SHOP
$187B
| $6.08M | 0.01% |
126,805
-95,495
| -43% | -$4.2M |
|
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.