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 | |
|---|---|---|---|---|---|---|
|
SACH
5926
PUT
Sachem Capital Corp
SACH
$39.1M
| $50K | ﹤0.01% |
13,500
+12,600
| +1,400% | +$46.4K |
|
5927
CALL
TFS Financial
TFSL
$5.16B
| $50K | ﹤0.01% |
4,000
+2,600
| +186% | +$36.3K |
|
|
VMEO
5928
DELISTED
Vimeo
VMEO
| $50K | ﹤0.01% |
+13,228
| New | +$51.9K |
|
5929
PUT
Viridian Therapeutics
VRDN
$2.09B
| $50K | ﹤0.01% |
2,000
-23,200
| -92% | -$744K |
|
|
YALA
5930
PUT
Yalla Group
YALA
$818M
| $50K | ﹤0.01% |
12,700
-2,400
| -16% | -$10.5K |
|
|
CANO
5931
DELISTED
Cano Health, Inc.
CANO
| $50K | ﹤0.01% |
553
-1,104
| -67% | -$150K |
|
|
OIL
5932
DELISTED
iPath Pure Beta Crude Oil ETN
OIL
| $50K | ﹤0.01% |
1,741
-126
| -7% | -$3.65K |
|
5933
PUT
AZZ Inc
AZZ
$4.35B
| $49K | ﹤0.01% |
+1,200
| New | +$49.2K |
|
5934
CALL
CrossAmerica Partners
CAPL
$847M
| $49K | ﹤0.01% |
2,300
-6,800
| -75% | -$144K |
|
5935
Clene
CLNN
$64M
| $49K | ﹤0.01% |
2,199
-2,416
| -52% | -$62.7K |
|
5936
CALL
CPS Technologies
CPSH
$75.5M
| $49K | ﹤0.01% |
17,300
-200
| -1% | -$577 |
|
|
CUK
5937
DELISTED
Carnival PLC
CUK
| $49K | ﹤0.01% |
5,458
+588
| +12% | +$5.5K |
|
5938
PUT
Genmab
GMAB
$17.7B
| $49K | ﹤0.01% |
1,300
-4,200
| -76% | -$161K |
|
|
GOOD
5939
PUT
Gladstone Commercial Corp
GOOD
$605M
| $49K | ﹤0.01% |
3,900
-1,800
| -32% | -$27.3K |
|
5940
CALL
i3 Verticals
IIIV
$412M
| $49K | ﹤0.01% |
2,000
+800
| +67% | +$21K |
|
5941
CALL
Lifestance Health
LFST
$4B
| $49K | ﹤0.01% |
6,700
-21,500
| -76% | -$119K |
|
|
NOAH
5942
PUT
Noah Holdings
NOAH
$580M
| $49K | ﹤0.01% |
3,000
+1,900
| +173% | +$35.2K |
|
5943
CALL
Paymentus
PAY
$4.29B
| $49K | ﹤0.01% |
5,600
+5,100
| +1,020% | +$43K |
|
5944
Purple Innovation
PRPL
$35.3M
| $49K | ﹤0.01% |
747
+586
| +364% | +$65.4K |
|
5945
CALL
Parsons
PSN
$4.72B
| $49K | ﹤0.01% |
1,100
-33,700
| -97% | -$1.48M |
|
5946
Smart Sand
SND
$185M
| $49K | ﹤0.01% |
28,348
-25,002
| -47% | -$46.5K |
|
5947
CALL
Sterling Infrastructure
STRL
$18.3B
| $49K | ﹤0.01% |
1,300
+1,100
| +550% | +$40.2K |
|
5948
Upwork
UPWK
$1.13B
| $49K | ﹤0.01% |
4,329
-7,529
| -63% | -$89.6K |
|
5949
PUT
W.R. Berkley
WRB
$26.9B
| $49K | ﹤0.01% |
1,200
-300
| -20% | -$13.4K |
|
5950
PUT
World Acceptance Corp
WRLD
$838M
| $49K | ﹤0.01% |
600
-3,200
| -84% | -$279K |
|
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.