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 | |
|---|---|---|---|---|---|---|
4701
PUT
Takeda Pharmaceutical
TAK
$56.7B
| $146K | ﹤0.01% |
8,900
+6,800
| +324% | +$108K |
|
4702
PUT
Valvoline
VVV
$5.06B
| $146K | ﹤0.01% |
4,200
+3,500
| +500% | +$122K |
|
|
RAD
4703
PUT
DELISTED
Rite Aid Corporation
RAD
| $146K | ﹤0.01% |
65,200
-47,900
| -42% | -$159K |
|
4704
Acadia Healthcare
ACHC
$2.52B
| $145K | ﹤0.01% |
+2,013
| New | +$157K |
|
4705
CALL
Ametek
AME
$53.9B
| $145K | ﹤0.01% |
1,000
-300
| -23% | -$42.6K |
|
4706
Credicorp
BAP
$30.5B
| $145K | ﹤0.01% |
1,100
+858
| +355% | +$115K |
|
|
4707
PUT
Credicorp
BAP
$30.5B
| $145K | ﹤0.01% |
1,100
+1,000
| +1,000% | +$134K |
|
|
CCC
4708
CALL
CCC Intelligent Solutions
CCC
$3.55B
| $145K | ﹤0.01% |
16,200
+4,000
| +33% | +$35.6K |
|
4709
Carriage Services
CSV
$647M
| $145K | ﹤0.01% |
4,757
-21,506
| -82% | -$682K |
|
4710
ProShares UltraShort Euro
EUO
$35.2M
| $145K | ﹤0.01% |
5,016
-17,832
| -78% | -$526K |
|
|
EXK
4711
CALL
Endeavour Silver
EXK
$2.24B
| $145K | ﹤0.01% |
37,600
+21,300
| +131% | +$70.6K |
|
4712
CALL
Fox Factory Holding Corp
FOXF
$794M
| $145K | ﹤0.01% |
1,200
+400
| +50% | +$45.9K |
|
4713
Griffon
GFF
$4.02B
| $145K | ﹤0.01% |
4,535
-47,659
| -91% | -$1.75M |
|
4714
Netflix
NFLX
$307B
| $145K | ﹤0.01% |
4,200
-9,000
| -68% | -$298K |
|
|
ACH
4715
PUT
Accendra Health
ACH
$254M
| $145K | ﹤0.01% |
10,000
+7,900
| +376% | +$142K |
|
4716
RenaissanceRe
RNR
$13.8B
| $145K | ﹤0.01% |
724
-242
| -25% | -$48.7K |
|
4717
CALL
Root
ROOT
$895M
| $145K | ﹤0.01% |
32,200
-20,400
| -39% | -$103K |
|
|
SII
4718
PUT
Sprott
SII
$2.68B
| $145K | ﹤0.01% |
4,000
-700
| -15% | -$26.2K |
|
4719
PUT
W&T Offshore
WTI
$525M
| $145K | ﹤0.01% |
28,700
+3,400
| +13% | +$19K |
|
4720
PUT
Assurant
AIZ
$13.9B
| $144K | ﹤0.01% |
1,200
+1,000
| +500% | +$125K |
|
4721
Alta Equipment Group
ALTG
$194M
| $144K | ﹤0.01% |
9,104
-25,611
| -74% | -$430K |
|
4722
PUT
Columbia Sportswear
COLM
$3.25B
| $144K | ﹤0.01% |
1,600
+1,400
| +700% | +$125K |
|
4723
Denali Therapeutics
DNLI
$3.79B
| $144K | ﹤0.01% |
6,293
+4,911
| +355% | +$135K |
|
|
HOUS
4724
PUT
DELISTED
Anywhere Real Estate
HOUS
| $144K | ﹤0.01% |
27,400
+15,400
| +128% | +$105K |
|
4725
Iovance Biotherapeutics
IOVA
$2.04B
| $144K | ﹤0.01% |
+23,576
| New | +$163K |
|
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.