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 | |
|---|---|---|---|---|---|---|
6501
PUT
Altisource Portfolio Solutions
ASPS
$63.6M
| $29K | ﹤0.01% |
813
-4,362
| -84% | -$211K |
|
6502
PUT
Atomera
ATOM
$200M
| $29K | ﹤0.01% |
4,700
-32,100
| -87% | -$217K |
|
6503
Bruker
BRKR
$9.57B
| $29K | ﹤0.01% |
+379
| New | +$27.4K |
|
6504
Cracker Barrel
CBRL
$1.26B
| $29K | ﹤0.01% |
261
-3,926
| -94% | -$429K |
|
6505
CALL
Columbus McKinnon
CMCO
$553M
| $29K | ﹤0.01% |
+800
| New | +$29K |
|
6506
CALL
iShares Core Dividend ETF
DIVB
$1.69B
| $29K | ﹤0.01% |
900
-4,700
| -84% | -$179K |
|
6507
8x8 Inc
EGHT
$269M
| $29K | ﹤0.01% |
+7,111
| New | +$35.6K |
|
6508
CALL
Gildan
GIL
$10.3B
| $29K | ﹤0.01% |
900
+800
| +800% | +$24.7K |
|
6509
PUT
Harmonic Inc
HLIT
$1.25B
| $29K | ﹤0.01% |
2,000
+900
| +82% | +$12.4K |
|
|
HPP
6510
PUT
Hudson Pacific Properties
HPP
$747M
| $29K | ﹤0.01% |
629
+472
| +301% | +$30.3K |
|
6511
CALL
Hancock Whitney
HWC
$6.2B
| $29K | ﹤0.01% |
800
| – | – |
|
|
6512
PUT
Hancock Whitney
HWC
$6.2B
| $29K | ﹤0.01% |
800
+700
| +700% | +$32.7K |
|
|
ILPT
6513
PUT
Industrial Logistics Properties Trust
ILPT
$575M
| $29K | ﹤0.01% |
9,600
+6,600
| +220% | +$25.8K |
|
6514
iShares Global Energy ETF
IXC
$2.79B
| $29K | ﹤0.01% |
779
+540
| +226% | +$20.9K |
|
6515
Kulicke & Soffa
KLIC
$4.67B
| $29K | ﹤0.01% |
566
-1,161
| -67% | -$60.4K |
|
6516
Kodiak Sciences
KOD
$2.6B
| $29K | ﹤0.01% |
+4,763
| New | +$33.3K |
|
|
LADR
6517
PUT
Ladder Capital
LADR
$1.21B
| $29K | ﹤0.01% |
3,100
+1,700
| +121% | +$18K |
|
6518
CALL
New Mountain Finance
NMFC
$651M
| $29K | ﹤0.01% |
2,400
+1,300
| +118% | +$16.4K |
|
|
ODP
6519
DELISTED
ODP
ODP
| $29K | ﹤0.01% |
658
+226
| +52% | +$11K |
|
6520
PUT
Purple Innovation
PRPL
$35.3M
| $29K | ﹤0.01% |
452
-32
| -7% | -$3.57K |
|
|
PVL
6521
CALL
Permianville Royalty Trust
PVL
$57.1M
| $29K | ﹤0.01% |
12,400
+600
| +5% | +$1.63K |
|
6522
Qiagen
QGEN
$8.54B
| $29K | ﹤0.01% |
613
-19,065
| -97% | -$970K |
|
6523
Rush Street Interactive
RSI
$2.77B
| $29K | ﹤0.01% |
9,602
-29,662
| -76% | -$114K |
|
|
OLOX
6524
PUT
Olenox Industries
OLOX
$6.74M
| $29K | ﹤0.01% |
5
| – | – |
|
|
NSLR
6525
Neostellar Capital Corp
NSLR
$269M
| $29K | ﹤0.01% |
8,105
+209
| +3% | +$804 |
|
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.