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 | |
|---|---|---|---|---|---|---|
|
CALY
5426
Callaway Golf Company
CALY
$3.32B
| $71K | ﹤0.01% |
+10,882
| New | +$79.9K |
|
5427
CALL
Ocugen
OCGN
$416M
| $71K | ﹤0.01% |
101,700
+29,900
| +42% | +$20.7K |
|
5428
CALL
Tarsus Pharmaceuticals
TARS
$2.58B
| $71K | ﹤0.01% |
1,400
-400
| -22% | -$19.8K |
|
5429
CALL
Turning Point Brands
TPB
$1.45B
| $71K | ﹤0.01% |
1,200
-1,200
| -50% | -$74.3K |
|
5430
CALL
Tootsie Roll Industries
TR
$2.93B
| $71K | ﹤0.01% |
2,334
-212
| -8% | -$6.32K |
|
5431
PUT
Veritone
VERI
$101M
| $71K | ﹤0.01% |
30,800
+9,400
| +44% | +$27.3K |
|
|
TBCH
5432
CALL
Turtle Beach Corp
TBCH
$243M
| $71K | ﹤0.01% |
5,000
-9,200
| -65% | -$153K |
|
|
ACRE
5433
Ares Commercial Real Estate
ACRE
$236M
| $70K | ﹤0.01% |
15,271
+8,341
| +120% | +$44.1K |
|
5434
Ametek
AME
$55.4B
| $70K | ﹤0.01% |
+411
| New | +$74.7K |
|
5435
CALL
Build-A-Bear
BBW
$425M
| $70K | ﹤0.01% |
1,900
-10,100
| -84% | -$402K |
|
5436
CALL
Bread Financial
BFH
$4.37B
| $70K | ﹤0.01% |
1,400
-5,100
| -78% | -$290K |
|
5437
Simplify Managed Futures Strategy ETF
CTA
$1.56B
| $70K | ﹤0.01% |
+2,369
| New | +$68.8K |
|
5438
CALL
Flywire
FLYW
$1.98B
| $70K | ﹤0.01% |
7,400
-54,900
| -88% | -$864K |
|
5439
CALL
Fulton Financial
FULT
$4.66B
| $70K | ﹤0.01% |
3,900
+3,800
| +3,800% | +$74.1K |
|
5440
Green Dot
GDOT
$743M
| $70K | ﹤0.01% |
8,373
+8,000
| +2,145% | +$67.9K |
|
5441
PUT
KB Financial Group
KB
$41.4B
| $70K | ﹤0.01% |
1,300
-300
| -19% | -$17.3K |
|
5442
PUT
908 Devices
MASS
$329M
| $70K | ﹤0.01% |
15,800
+15,000
| +1,875% | +$44.4K |
|
5443
CALL
Moelis & Co
MC
$4.97B
| $70K | ﹤0.01% |
1,200
-4,200
| -78% | -$296K |
|
5444
PUT
Neurogene
NGNE
$656M
| $70K | ﹤0.01% |
+6,000
| New | +$104K |
|
5445
PUT
Shoals Technologies Group
SHLS
$1.47B
| $70K | ﹤0.01% |
21,200
+3,700
| +21% | +$15.4K |
|
5446
VanEck Steel ETF
SLX
$169M
| $70K | ﹤0.01% |
1,140
+525
| +85% | +$32.4K |
|
|
SNV
5447
PUT
DELISTED
Synovus
SNV
| $70K | ﹤0.01% |
1,500
-5,200
| -78% | -$268K |
|
5448
CALL
Spire
SR
$4.72B
| $70K | ﹤0.01% |
+900
| New | +$65.8K |
|
|
SRDX
5449
DELISTED
Surmodics
SRDX
| $70K | ﹤0.01% |
2,300
+653
| +40% | +$22K |
|
5450
ProShares UltraPro Short Russell2000
SRTY
$79.9M
| $70K | ﹤0.01% |
+710
| New | +$56.8K |
|
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.