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 | |
|---|---|---|---|---|---|---|
|
AXON
576
CALL
Axon Enterprise
AXON
$39.6B
| $18.1M | 0.01% |
34,400
-4,300
| -11% | -$2.52M |
|
577
PUT
Truist Financial
TFC
$63.2B
| $18M | 0.01% |
437,600
+248,900
| +132% | +$11.1M |
|
|
ZVOL
578
CALL
Volatility Premium Plus ETF
ZVOL
$13.1M
| $18M | 0.01% |
957,200
-34,500
| -3% | -$612K |
|
579
PUT
Halliburton
HAL
$27.6B
| $18M | 0.01% |
708,200
-6,100
| -0.9% | -$160K |
|
580
PUT
2x Long VIX Futures ETF
UVIX
$269M
| $17.9M | 0.01% |
28,045
+25,385
| +954% | +$16.6M |
|
581
PUT
Atlassian
TEAM
$21.7B
| $17.9M | 0.01% |
84,300
-124,900
| -60% | -$33M |
|
582
PUT
EOG Resources
EOG
$76.7B
| $17.7M | 0.01% |
138,000
-51,700
| -27% | -$6.65M |
|
583
PUT
British American Tobacco
BTI
$134B
| $17.5M | 0.01% |
423,200
-43,500
| -9% | -$1.71M |
|
584
PUT
Lyft
LYFT
$5.57B
| $17.5M | 0.01% |
1,472,000
-241,400
| -14% | -$3.14M |
|
585
PUT
Hershey
HSY
$35B
| $17.4M | 0.01% |
101,900
-150,900
| -60% | -$24.7M |
|
586
CALL
Howmet Aerospace
HWM
$112B
| $17.4M | 0.01% |
133,800
+50,200
| +60% | +$6.38M |
|
587
CALL
Cencora
COR
$58.5B
| $17.3M | 0.01% |
62,100
+13,500
| +28% | +$3.39M |
|
588
PUT
Global Payments
GPN
$21.6B
| $17.2M | 0.01% |
175,800
-119,600
| -40% | -$12.5M |
|
589
PUT
Snap
SNAP
$7.52B
| $17.2M | 0.01% |
1,973,500
+288,200
| +17% | +$3M |
|
590
CALL
Kenvue
KVUE
$36.7B
| $17.2M | 0.01% |
716,200
-31,000
| -4% | -$686K |
|
591
CALL
Zillow
Z
$7.18B
| $17.2M | 0.01% |
250,500
-276,900
| -53% | -$21.2M |
|
592
CALL
Cadence Design Systems
CDNS
$93B
| $17.1M | 0.01% |
67,400
-53,900
| -44% | -$15M |
|
593
CALL
S&P Global
SPGI
$127B
| $17.1M | 0.01% |
33,700
-15,400
| -31% | -$7.87M |
|
594
CALL
Cognizant
CTSH
$20.4B
| $16.9M | 0.01% |
220,900
+92,400
| +72% | +$7.52M |
|
595
CALL
Elevance Health
ELV
$84.4B
| $16.9M | 0.01% |
38,800
-37,700
| -49% | -$15.1M |
|
596
PUT
Cheniere Energy
LNG
$56B
| $16.9M | 0.01% |
72,900
-51,000
| -41% | -$11.5M |
|
597
CALL
Sempra
SRE
$60.8B
| $16.8M | 0.01% |
235,800
+234,100
| +13,771% | +$18.2M |
|
598
CALL
Willis Towers Watson
WTW
$27.1B
| $16.8M | 0.01% |
49,600
+49,100
| +9,820% | +$16M |
|
599
CALL
TKO Group
TKO
$13.6B
| $16.7M | 0.01% |
109,600
-148,800
| -58% | -$22.7M |
|
600
CALL
Southwest Airlines
LUV
$23.3B
| $16.7M | 0.01% |
497,800
-271,500
| -35% | -$8.6M |
|
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.