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 | |
|---|---|---|---|---|---|---|
3751
Cirrus Logic
CRUS
$6.89B
| $323K | ﹤0.01% |
+2,958
| New | +$288K |
|
3752
CALL
MDU Resources
MDU
$4.34B
| $323K | ﹤0.01% |
27,877
-4,997
| -15% | -$58.1K |
|
|
RDUS
3753
DELISTED
Radius Recycling
RDUS
| $323K | ﹤0.01% |
+10,390
| New | +$337K |
|
3754
CALL
Radware
RDWR
$1.2B
| $323K | ﹤0.01% |
+15,000
| New | +$314K |
|
3755
CALL
Regal Rexnord
RRX
$13.5B
| $323K | ﹤0.01% |
2,300
-1,300
| -36% | -$188K |
|
3756
CALL
abrdn Physical Silver Shares ETF
SIVR
$3.97B
| $323K | ﹤0.01% |
14,000
+8,100
| +137% | +$175K |
|
3757
UroGen Pharma
URGN
$2B
| $323K | ﹤0.01% |
34,961
+31,661
| +959% | +$291K |
|
3758
CALL
Zimmer Biomet
ZBH
$18.5B
| $323K | ﹤0.01% |
2,500
-3,900
| -61% | -$490K |
|
3759
CALL
Genie Energy
GNE
$383M
| $322K | ﹤0.01% |
23,300
+8,900
| +62% | +$101K |
|
3760
CALL
Polestar Automotive Holding UK
PSNY
$2.04B
| $322K | ﹤0.01% |
2,833
-7,327
| -72% | -$1.11M |
|
|
LUCK
3761
CALL
Lucky Strike Entertainment
LUCK
$960M
| $322K | ﹤0.01% |
19,000
+18,600
| +4,650% | +$276K |
|
3762
PUT
National Beverage
FIZZ
$3.03B
| $321K | ﹤0.01% |
6,100
+600
| +11% | +$28K |
|
3763
PUT
iShares S&P GSCI Commodity-Indexed Trust
GSG
$969M
| $321K | ﹤0.01% |
16,000
-44,600
| -74% | -$907K |
|
3764
PUT
Pentair
PNR
$10.6B
| $320K | ﹤0.01% |
5,800
-6,100
| -51% | -$324K |
|
3765
PUT
Infosys
INFY
$49.9B
| $319K | ﹤0.01% |
18,300
-190,100
| -91% | -$3.46M |
|
3766
NextEra Energy
NEE
$186B
| $319K | ﹤0.01% |
4,150
-89,078
| -96% | -$6.85M |
|
|
PLL
3767
DELISTED
Piedmont Lithium
PLL
| $319K | ﹤0.01% |
+5,314
| New | +$322K |
|
3768
CALL
Revvity
RVTY
$12.5B
| $319K | ﹤0.01% |
2,400
+1,800
| +300% | +$237K |
|
|
SUPV
3769
CALL
Grupo Supervielle
SUPV
$826M
| $319K | ﹤0.01% |
141,800
+116,000
| +450% | +$301K |
|
|
SVC
3770
PUT
Service Properties Trust
SVC
$1.1B
| $319K | ﹤0.01% |
6,420
+3,420
| +114% | +$158K |
|
3771
Vista Energy
VIST
$7.16B
| $319K | ﹤0.01% |
+16,128
| New | +$276K |
|
3772
WisdomTree Emerging Markets High Dividend Fund
DEM
$3.85B
| $318K | ﹤0.01% |
8,412
-844
| -9% | -$31.8K |
|
3773
PUT
Edgewell Personal Care
EPC
$1.3B
| $318K | ﹤0.01% |
7,500
-12,400
| -62% | -$520K |
|
3774
CALL
Gogo Inc
GOGO
$542M
| $317K | ﹤0.01% |
21,900
-25,100
| -53% | -$391K |
|
3775
CALL
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.98B
| $317K | ﹤0.01% |
11,100
+8,300
| +296% | +$262K |
|
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.