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 | |
|---|---|---|---|---|---|---|
6126
CALL
Ardagh Metal Packaging
AMBP
$2.83B
| $41K | ﹤0.01% |
10,100
-11,200
| -53% | -$55K |
|
6127
CALL
A10 Networks
ATEN
$2.13B
| $41K | ﹤0.01% |
2,700
-6,500
| -71% | -$99.2K |
|
6128
CALL
BARK
BARK
$81.8M
| $41K | ﹤0.01% |
1,440
-555
| -28% | -$17.6K |
|
6129
PUT
Pathward Financial
CASH
$1.86B
| $41K | ﹤0.01% |
1,000
-1,800
| -64% | -$84.8K |
|
6130
Cue Biopharma
CUE
$113M
| $41K | ﹤0.01% |
+386
| New | +$36.8K |
|
6131
CALL
CuriosityStream
CURI
$145M
| $41K | ﹤0.01% |
30,800
-700
| -2% | -$1.11K |
|
6132
CALL
First Bancorp
FBP
$4.42B
| $41K | ﹤0.01% |
3,600
-17,600
| -83% | -$232K |
|
6133
PUT
First Interstate BancSystem
FIBK
$3.69B
| $41K | ﹤0.01% |
+1,400
| New | +$49.3K |
|
6134
PUT
FNB Corp
FNB
$6.73B
| $41K | ﹤0.01% |
3,600
+500
| +16% | +$6.67K |
|
6135
CALL
Genpact
G
$5.96B
| $41K | ﹤0.01% |
900
-1,000
| -53% | -$46.7K |
|
6136
WisdomTree Europe Hedged Equity Fund
HEDJ
$1.83B
| $41K | ﹤0.01% |
1,012
-1,478
| -59% | -$58K |
|
6137
CS Disco
LAW
$250M
| $41K | ﹤0.01% |
6,204
+5,905
| +1,975% | +$42K |
|
|
MTA
6138
CALL
Metalla Royalty & Streaming
MTA
$688M
| $41K | ﹤0.01% |
7,400
-5,300
| -42% | -$26.2K |
|
|
NAK
6139
CALL
Northern Dynasty Minerals
NAK
$784M
| $41K | ﹤0.01% |
174,500
-139,900
| -44% | -$32.2K |
|
|
NFGC
6140
CALL
New Found Gold
NFGC
$522M
| $41K | ﹤0.01% |
8,200
-2,600
| -24% | -$10.3K |
|
6141
PUT
Oshkosh
OSK
$8.79B
| $41K | ﹤0.01% |
500
-2,300
| -82% | -$209K |
|
6142
ProPetro Holding
PUMP
$1.36B
| $41K | ﹤0.01% |
5,794
-30,139
| -84% | -$273K |
|
6143
PUT
Qiagen
QGEN
$8.54B
| $41K | ﹤0.01% |
849
-3,489
| -80% | -$178K |
|
6144
CALL
Quince Therapeutics
QNCX
$22.9M
| $41K | ﹤0.01% |
132
+3
| +2% | +$587 |
|
6145
PUT
SES AI
SES
$203M
| $41K | ﹤0.01% |
14,100
+10,100
| +253% | +$31.8K |
|
|
FIRY
6146
PUT
Firy Inc
FIRY
$148M
| $41K | ﹤0.01% |
3,500
-365
| -9% | -$4.84K |
|
|
UMH
6147
PUT
UMH Properties
UMH
$1.29B
| $41K | ﹤0.01% |
2,800
+2,400
| +600% | +$39.4K |
|
|
TPC
6148
CALL
Tutor Perini Cor
TPC
$4.41B
| $41K | ﹤0.01% |
6,700
-8,000
| -54% | -$64.4K |
|
|
VGR
6149
DELISTED
Vector Group Ltd.
VGR
| $41K | ﹤0.01% |
+3,472
| New | +$43.8K |
|
|
DCPH
6150
CALL
DELISTED
Deciphera Pharmaceuticals, Inc. Common Stock
DCPH
| $41K | ﹤0.01% |
2,700
-14,400
| -84% | -$240K |
|
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.