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 | |
|---|---|---|---|---|---|---|
2626
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $1.09M | ﹤0.01% |
10,900
-18,900
| -63% | -$1.84M |
|
|
HBI
2627
PUT
DELISTED
Hanesbrands
HBI
| $1.09M | ﹤0.01% |
188,600
+25,700
| +16% | +$180K |
|
2628
PUT
Xylem
XYL
$28.5B
| $1.09M | ﹤0.01% |
9,100
-5,400
| -37% | -$669K |
|
2629
Elanco Animal Health
ELAN
$12.4B
| $1.09M | ﹤0.01% |
103,437
+58,998
| +133% | +$667K |
|
2630
PUT
Ashland
ASH
$3.04B
| $1.08M | ﹤0.01% |
18,300
+17,300
| +1,730% | +$1.1M |
|
2631
CALL
The RealReal
REAL
$1.34B
| $1.08M | ﹤0.01% |
201,100
-40,600
| -17% | -$308K |
|
2632
CALL
NOV
NOV
$7.45B
| $1.08M | ﹤0.01% |
71,100
-7,800
| -10% | -$117K |
|
2633
PUT
Sherwin-Williams
SHW
$78.3B
| $1.08M | ﹤0.01% |
3,100
-16,500
| -84% | -$5.79M |
|
2634
Direxion Daily Homebuilders & Supplies Bull 3X ETF
NAIL
$580M
| $1.08M | ﹤0.01% |
+17,377
| New | +$1.36M |
|
2635
AeroVironment
AVAV
$7.57B
| $1.08M | ﹤0.01% |
9,064
+5,875
| +184% | +$902K |
|
2636
CALL
WIX.com
WIX
$2.15B
| $1.08M | ﹤0.01% |
6,600
-29,200
| -82% | -$6.07M |
|
2637
PUT
Cullen/Frost Bankers
CFR
$10.3B
| $1.08M | ﹤0.01% |
8,600
-8,700
| -50% | -$1.17M |
|
|
TGNA
2638
DELISTED
TEGNA Inc
TGNA
| $1.08M | ﹤0.01% |
59,065
+44,103
| +295% | +$798K |
|
2639
PUT
Hecla Mining
HL
$10.2B
| $1.07M | ﹤0.01% |
193,400
-50,100
| -21% | -$278K |
|
2640
CALL
IQVIA
IQV
$34.7B
| $1.07M | ﹤0.01% |
6,100
-12,300
| -67% | -$2.39M |
|
|
GOOS
2641
CALL
Canada Goose Holdings
GOOS
$868M
| $1.07M | ﹤0.01% |
135,100
-1,800
| -1% | -$17.8K |
|
2642
CALL
Boston Beer
SAM
$1.88B
| $1.07M | ﹤0.01% |
4,500
+3,400
| +309% | +$828K |
|
2643
Conagra Brands
CAG
$7.07B
| $1.07M | ﹤0.01% |
40,234
+10,309
| +34% | +$266K |
|
2644
CALL
CDW
CDW
$17.1B
| $1.07M | ﹤0.01% |
6,700
-9,200
| -58% | -$1.67M |
|
2645
PUT
Global E Online
GLBE
$6.08B
| $1.07M | ﹤0.01% |
30,100
+3,500
| +13% | +$172K |
|
2646
PUT
Pitney Bowes
PBI
$2.42B
| $1.07M | ﹤0.01% |
118,500
-5,300
| -4% | -$48K |
|
2647
CALL
XP
XP
$8.62B
| $1.07M | ﹤0.01% |
78,000
+47,500
| +156% | +$654K |
|
2648
CALL
Cellebrite
CLBT
$3.54B
| $1.07M | ﹤0.01% |
55,100
+21,000
| +62% | +$442K |
|
2649
PUT
Paycom
PAYC
$6.78B
| $1.07M | ﹤0.01% |
4,900
-32,800
| -87% | -$6.92M |
|
2650
CALL
Stratasys
SSYS
$697M
| $1.07M | ﹤0.01% |
109,200
+48,900
| +81% | +$503K |
|
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.