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 | |
|---|---|---|---|---|---|---|
4976
PUT
Tecnoglass
TGLS
$1.99B
| $117K | ﹤0.01% |
2,800
+2,500
| +833% | +$89.6K |
|
4977
Expro Ltd
XPRO
$1.64B
| $117K | ﹤0.01% |
6,385
+5,992
| +1,525% | +$118K |
|
4978
CALL
Absci
ABSI
$1.17B
| $116K | ﹤0.01% |
+66,800
| New | +$162K |
|
|
AEVA
4979
PUT
Aeva Technologies
AEVA
$956M
| $116K | ﹤0.01% |
19,620
+2,260
| +13% | +$18.1K |
|
4980
CALL
APi Group
APG
$16.7B
| $116K | ﹤0.01% |
7,800
+7,350
| +1,633% | +$106K |
|
4981
CALL
CorMedix
CRMD
$564M
| $116K | ﹤0.01% |
28,100
+23,000
| +451% | +$94.1K |
|
4982
PUT
Essential Properties Realty Trust
EPRT
$6.92B
| $116K | ﹤0.01% |
4,700
-14,800
| -76% | -$365K |
|
4983
PUT
Comfort Systems
FIX
$53.5B
| $116K | ﹤0.01% |
+800
| New | +$104K |
|
|
GORV
4984
PUT
DELISTED
Lazydays
GORV
| $116K | ﹤0.01% |
333
+270
| +429% | +$102K |
|
4985
PUT
Goldman Sachs BDC
GSBD
$997M
| $116K | ﹤0.01% |
8,500
+8,400
| +8,400% | +$125K |
|
4986
Liberty Broadband Class C
LBRDK
$4.89B
| $116K | ﹤0.01% |
1,422
-40
| -3% | -$3.45K |
|
4987
PUT
Maravai LifeSciences
MRVI
$972M
| $116K | ﹤0.01% |
8,300
+7,400
| +822% | +$106K |
|
4988
CALL
NerdWallet
NRDS
$632M
| $116K | ﹤0.01% |
7,200
-5,700
| -44% | -$85.9K |
|
4989
Titan Machinery
TITN
$420M
| $116K | ﹤0.01% |
+3,816
| New | +$155K |
|
4990
PUT
Weave Communications
WEAV
$553M
| $116K | ﹤0.01% |
23,400
-500
| -2% | -$2.51K |
|
|
JOAN
4991
DELISTED
JOANN, Inc. Common Stock
JOAN
| $116K | ﹤0.01% |
72,967
+10,516
| +17% | +$33.8K |
|
4992
PUT
Algonquin Power & Utilities
AQN
$4.59B
| $115K | ﹤0.01% |
13,700
+3,400
| +33% | +$25.6K |
|
|
BPT
4993
PUT
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $115K | ﹤0.01% |
15,100
+10,900
| +260% | +$116K |
|
4994
CALL
Corporacion America
CAAP
$4.17B
| $115K | ﹤0.01% |
11,300
+10,500
| +1,313% | +$99.8K |
|
4995
PUT
CAE Inc. Common Shares
CAE
$8.44B
| $115K | ﹤0.01% |
+5,100
| New | +$111K |
|
4996
Genco Shipping & Trading
GNK
$1.1B
| $115K | ﹤0.01% |
7,366
-45,641
| -86% | -$782K |
|
4997
PUT
Nano X Imaging
NNOX
$61.1M
| $115K | ﹤0.01% |
20,100
-264,900
| -93% | -$2.03M |
|
4998
PUT
Sonoco
SON
$5.83B
| $115K | ﹤0.01% |
1,900
+300
| +19% | +$17.8K |
|
4999
PUT
Tenaya Therapeutics
TNYA
$160M
| $115K | ﹤0.01% |
40,400
+38,600
| +2,144% | +$108K |
|
|
UNIT
5000
PUT
Uniti Group
UNIT
$2.52B
| $115K | ﹤0.01% |
32,500
-126,200
| -80% | -$669K |
|
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.