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 | |
|---|---|---|---|---|---|---|
|
YALA
4401
Yalla Group
YALA
$814M
| $189K | ﹤0.01% |
36,309
-4,433
| -11% | -$19.1K |
|
|
DEA
4402
CALL
Easterly Government Properties
DEA
$1.16B
| $188K | ﹤0.01% |
7,120
-640
| -8% | -$17.6K |
|
4403
PUT
Option Care Health
OPCH
$3.76B
| $188K | ﹤0.01% |
5,400
+2,300
| +74% | +$72.2K |
|
4404
PUT
Sigma Lithium
SGML
$1.05B
| $188K | ﹤0.01% |
18,100
+11,800
| +187% | +$135K |
|
4405
Woodside Energy
WDS
$44.2B
| $188K | ﹤0.01% |
12,981
-12,484
| -49% | -$190K |
|
4406
PUT
Atlas Lithium Corp
ATLX
$75.5M
| $187K | ﹤0.01% |
36,200
+30,200
| +503% | +$180K |
|
4407
PUT
Buckle
BKE
$2.32B
| $187K | ﹤0.01% |
4,900
-1,500
| -23% | -$65K |
|
4408
Global X Cybersecurity ETF
BUG
$1.25B
| $187K | ﹤0.01% |
5,805
+390
| +7% | +$13.2K |
|
4409
CALL
F&G Annuities & Life
FG
$3.91B
| $187K | ﹤0.01% |
+5,200
| New | +$218K |
|
|
FPI
4410
CALL
Farmland Partners
FPI
$415M
| $187K | ﹤0.01% |
16,800
+13,200
| +367% | +$152K |
|
4411
PUT
Golub Capital BDC
GBDC
$3.33B
| $187K | ﹤0.01% |
12,400
-800
| -6% | -$12.3K |
|
4412
Green Brick Partners
GRBK
$3.09B
| $187K | ﹤0.01% |
3,211
+1,690
| +111% | +$99.9K |
|
4413
Grindr
GRND
$3.06B
| $187K | ﹤0.01% |
+10,484
| New | +$184K |
|
4414
CALL
IMAX
IMAX
$2.67B
| $187K | ﹤0.01% |
7,100
+2,800
| +65% | +$69.9K |
|
4415
CALL
ACI Worldwide
ACIW
$6.12B
| $186K | ﹤0.01% |
3,400
+2,400
| +240% | +$127K |
|
4416
Baytex Energy
BTE
$2.96B
| $186K | ﹤0.01% |
83,726
+45,973
| +122% | +$109K |
|
4417
CALL
Cemex
CX
$16.9B
| $186K | ﹤0.01% |
33,200
+29,200
| +730% | +$177K |
|
4418
PUT
MBIA
MBI
$275M
| $186K | ﹤0.01% |
+37,500
| New | +$232K |
|
4419
CALL
Neurogene
NGNE
$672M
| $186K | ﹤0.01% |
15,900
-4,300
| -21% | -$74.7K |
|
4420
Xerox
XRX
$345M
| $186K | ﹤0.01% |
+38,557
| New | +$289K |
|
4421
PUT
Build-A-Bear
BBW
$445M
| $185K | ﹤0.01% |
5,000
-104,500
| -95% | -$4.15M |
|
4422
Clean Harbors
CLH
$17.2B
| $185K | ﹤0.01% |
+942
| New | +$206K |
|
4423
Teucrium Corn Fund
CORN
$178M
| $185K | ﹤0.01% |
9,989
-4,223
| -30% | -$82K |
|
4424
PUT
Federal Realty Investment Trust
FRT
$10.9B
| $185K | ﹤0.01% |
1,900
-700
| -27% | -$72.7K |
|
|
GOGL
4425
PUT
DELISTED
Golden Ocean Group
GOGL
| $185K | ﹤0.01% |
23,200
-57,600
| -71% | -$512K |
|
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.