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 | |
|---|---|---|---|---|---|---|
6351
PUT
Covenant Logistics
CVLG
$1.04B
| $26K | ﹤0.01% |
+1,200
| New | +$30.9K |
|
6352
Deluxe
DLX
$1.25B
| $26K | ﹤0.01% |
+1,662
| New | +$31.5K |
|
|
ETNB
6353
DELISTED
89bio
ETNB
| $26K | ﹤0.01% |
+3,686
| New | +$32.2K |
|
6354
PUT
Funko
FNKO
$346M
| $26K | ﹤0.01% |
3,900
-106,000
| -96% | -$1.23M |
|
6355
CALL
Galectin Therapeutics
GALT
$230M
| $26K | ﹤0.01% |
21,500
-64,900
| -75% | -$91K |
|
6356
Genworth Financial
GNW
$3.86B
| $26K | ﹤0.01% |
3,740
-100,094
| -96% | -$696K |
|
|
GP
6357
CALL
GreenPower Motor Co
GP
$10.5M
| $26K | ﹤0.01% |
5,360
-10
| -0.2% | -$69 |
|
6358
PUT
Harmony Biosciences
HRMY
$2.08B
| $26K | ﹤0.01% |
800
-200
| -20% | -$7.17K |
|
6359
CALL
Hancock Whitney
HWC
$6.19B
| $26K | ﹤0.01% |
+500
| New | +$28.1K |
|
6360
CALL
Intellicheck
IDN
$75.2M
| $26K | ﹤0.01% |
8,900
+6,900
| +345% | +$18.2K |
|
6361
IDT Corp
IDT
$1.67B
| $26K | ﹤0.01% |
510
-5,682
| -92% | -$275K |
|
6362
ARK Israel Innovative Technology ETF
IZRL
$137M
| $26K | ﹤0.01% |
+1,216
| New | +$28.5K |
|
6363
CALL
J&J Snack Foods
JJSF
$1.49B
| $26K | ﹤0.01% |
200
-200
| -50% | -$26.9K |
|
|
TBHC
6364
PUT
DELISTED
The Brand House Collective
TBHC
| $26K | ﹤0.01% |
21,200
-67,700
| -76% | -$98.6K |
|
6365
CALL
Laser Photonics
LASE
$48.5M
| $26K | ﹤0.01% |
8,600
-22,000
| -72% | -$92.3K |
|
|
MRC
6366
CALL
DELISTED
MRC Global
MRC
| $26K | ﹤0.01% |
2,300
+2,100
| +1,050% | +$27.1K |
|
|
NOTE
6367
PUT
DELISTED
FiscalNote
NOTE
| $26K | ﹤0.01% |
2,683
+1,108
| +70% | +$16.7K |
|
6368
CALL
NET Power
NPWR
$120M
| $26K | ﹤0.01% |
9,900
-36,300
| -79% | -$256K |
|
|
OBE
6369
Obsidian Energy
OBE
$656M
| $26K | ﹤0.01% |
4,592
-11,733
| -72% | -$64.7K |
|
|
OPRA
6370
Opera Ltd
OPRA
$1.68B
| $26K | ﹤0.01% |
+1,635
| New | +$30.3K |
|
6371
PUT
Prairie Operating Co
PROP
$68.4M
| $26K | ﹤0.01% |
+5,000
| New | +$36.5K |
|
6372
CALL
SOPHiA GENETICS
SOPH
$466M
| $26K | ﹤0.01% |
+8,100
| New | +$28.5K |
|
6373
SoundThinking
SSTI
$108M
| $26K | ﹤0.01% |
1,558
+1,394
| +850% | +$20.6K |
|
6374
PUT
Telecom Argentina
TEO
$5.84B
| $26K | ﹤0.01% |
2,600
+200
| +8% | +$2.36K |
|
6375
PUT
TFS Financial
TFSL
$5.11B
| $26K | ﹤0.01% |
2,100
+1,400
| +200% | +$17.9K |
|
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.