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 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$272M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$99M |
| 3 |
NVIDIA
NVDA
|
+$89.9M |
| 4 |
TSMC
TSM
|
+$87.7M |
| 5 |
Amazon
AMZN
|
+$61M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$518M |
| 2 |
Strategy Inc
MSTR
|
+$81.2M |
| 3 |
Alibaba
BABA
|
+$66.7M |
| 4 |
Advanced Micro Devices
AMD
|
+$44.3M |
| 5 |
Uber
UBER
|
+$41.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Consumer Discretionary | 0.22% |
| 3 | Healthcare | 0.17% |
| 4 | Communication Services | 0.15% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6826
Crescent Energy
CRGY
$3.44B
| $14K | ﹤0.01% |
1,278
-10,873
| -89% | -$150K |
|
|
CTLP
6827
CALL
DELISTED
Cantaloupe
CTLP
| $14K | ﹤0.01% |
1,800
-400
| -18% | -$3.55K |
|
6828
Digi International
DGII
$2.53B
| $14K | ﹤0.01% |
+513
| New | +$15.8K |
|
6829
CALL
Healthpeak Properties
DOC
$15.7B
| $14K | ﹤0.01% |
+700
| New | +$14.2K |
|
6830
CALL
Excelerate Energy
EE
$1.19B
| $14K | ﹤0.01% |
500
-700
| -58% | -$20.9K |
|
6831
CALL
eHealth
EHTH
$43.2M
| $14K | ﹤0.01% |
2,200
-1,400
| -39% | -$12.7K |
|
6832
Entravision Communication
EVC
$1.01B
| $14K | ﹤0.01% |
+6,968
| New | +$15.2K |
|
|
KYNB
6833
PUT
Kyntra Bio
KYNB
$28.2M
| $14K | ﹤0.01% |
1,932
+12
| +0.6% | +$144 |
|
6834
Five Point Holdings
FPH
$395M
| $14K | ﹤0.01% |
2,806
+2,314
| +470% | +$12.2K |
|
|
FRSX
6835
Foresight Autonomous Holdings
FRSX
$3.58M
| $14K | ﹤0.01% |
1,080
-121
| -10% | -$2.48K |
|
6836
Flotek Industries
FTK
$856M
| $14K | ﹤0.01% |
+1,695
| New | +$14.6K |
|
6837
CALL
Gladstone Investment Corp
GAIN
$655M
| $14K | ﹤0.01% |
1,100
-1,200
| -52% | -$16.1K |
|
6838
Holley
HLLY
$336M
| $14K | ﹤0.01% |
5,833
+3,239
| +125% | +$9.09K |
|
6839
PUT
HUB Group
HUBG
$2.92B
| $14K | ﹤0.01% |
400
+300
| +300% | +$12.5K |
|
|
INZY
6840
DELISTED
Inozyme Pharma
INZY
| $14K | ﹤0.01% |
16,349
+16,022
| +4,900% | +$22.2K |
|
6841
State Street SPDR S&P Capital Markets ETF
KCE
$461M
| $14K | ﹤0.01% |
+111
| New | +$15.2K |
|
|
KNDI
6842
Kandi Technologies Group
KNDI
$63.5M
| $14K | ﹤0.01% |
9,926
+1,051
| +12% | +$1.35K |
|
|
LADR
6843
Ladder Capital
LADR
$1.26B
| $14K | ﹤0.01% |
1,298
-2,081
| -62% | -$23.8K |
|
6844
CALL
Lesaka Technologies
LSAK
$392M
| $14K | ﹤0.01% |
3,000
+1,000
| +50% | +$4.94K |
|
6845
PUT
LSB Industries
LXU
$822M
| $14K | ﹤0.01% |
2,200
+200
| +10% | +$1.56K |
|
6846
CALL
Manchester United
MANU
$4.03B
| $14K | ﹤0.01% |
1,100
-22,300
| -95% | -$337K |
|
6847
MediWound
MDWD
$188M
| $14K | ﹤0.01% |
932
+541
| +138% | +$9.68K |
|
|
MLNK
6848
CALL
DELISTED
MeridianLink
MLNK
| $14K | ﹤0.01% |
+800
| New | +$15.5K |
|
6849
Noodles & Co
NDLS
$88.2M
| $14K | ﹤0.01% |
1,673
+1,660
| +12,769% | +$16.3K |
|
|
NINE
6850
DELISTED
Nine Energy Service
NINE
| $14K | ﹤0.01% |
12,759
+6,085
| +91% | +$7.47K |
|
Similar funds
Simplex Trading's Q1 2025 Portfolio in Review
As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.
- Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
- Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
- Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
- Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
- Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
- Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
- Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.