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 | |
|---|---|---|---|---|---|---|
4451
Vita Coco
COCO
$3.86B
| $180K | ﹤0.01% |
5,880
+5,865
| +39,100% | +$209K |
|
4452
T-Rex 2X Long NVIDIA Daily Target ETF
NVDX
$391M
| $180K | ﹤0.01% |
23,141
-170
| -0.7% | -$1.97K |
|
4453
PUT
Peoples Bancorp
PEBO
$1.51B
| $180K | ﹤0.01% |
+6,100
| New | +$192K |
|
4454
PUT
Red Violet
RDVT
$957M
| $180K | ﹤0.01% |
4,800
| – | – |
|
4455
CALL
Banco Santander
SAN
$191B
| $180K | ﹤0.01% |
27,000
+22,700
| +528% | +$133K |
|
4456
CALL
Veritone
VERI
$92.9M
| $180K | ﹤0.01% |
77,600
-74,000
| -49% | -$215K |
|
|
LADR
4457
PUT
Ladder Capital
LADR
$1.24B
| $179K | ﹤0.01% |
15,700
-2,900
| -16% | -$33.1K |
|
4458
CALL
LifeMD
LFMD
$176M
| $179K | ﹤0.01% |
33,000
-9,700
| -23% | -$55K |
|
4459
Vicor
VICR
$8.33B
| $179K | ﹤0.01% |
+3,840
| New | +$204K |
|
4460
PUT
Barnes & Noble Education
BNED
$435M
| $178K | ﹤0.01% |
17,000
-250,600
| -94% | -$2.59M |
|
4461
Casey's General Stores
CASY
$32.1B
| $178K | ﹤0.01% |
411
-191
| -32% | -$78.3K |
|
4462
Seanergy Maritime Holdings
SHIP
$349M
| $178K | ﹤0.01% |
27,889
+20,616
| +283% | +$144K |
|
4463
PUT
Suburban Propane Partners
SPH
$1.21B
| $178K | ﹤0.01% |
8,500
+5,600
| +193% | +$114K |
|
4464
PUT
Healthpeak Properties
DOC
$15.5B
| $177K | ﹤0.01% |
8,800
+8,600
| +4,300% | +$174K |
|
4465
Direxion Daily Real Estate Bull 3X ETF
DRN
$48.5M
| $177K | ﹤0.01% |
17,171
+12,107
| +239% | +$125K |
|
4466
CALL
Five Point Holdings
FPH
$387M
| $177K | ﹤0.01% |
33,300
+32,300
| +3,230% | +$170K |
|
4467
KULR Technology Group
KULR
$112M
| $177K | ﹤0.01% |
16,802
+15,290
| +1,011% | +$239K |
|
|
PINE
4468
PUT
Alpine Income Property Trust
PINE
$336M
| $177K | ﹤0.01% |
10,600
+9,000
| +563% | +$149K |
|
4469
PUT
Scholastic
SCHL
$774M
| $177K | ﹤0.01% |
9,400
+8,100
| +623% | +$162K |
|
|
SHCO
4470
DELISTED
Soho House & Co
SHCO
| $177K | ﹤0.01% |
28,762
+13,310
| +86% | +$96.3K |
|
|
ANSS
4471
DELISTED
Ansys
ANSS
| $176K | ﹤0.01% |
+559
| New | +$188K |
|
4472
Viant Technology
DSP
$229M
| $176K | ﹤0.01% |
+14,215
| New | +$261K |
|
4473
PUT
Ingersoll Rand
IR
$33.1B
| $176K | ﹤0.01% |
2,200
+300
| +16% | +$26.1K |
|
4474
CALL
Ocean Power Technologies
OPTT
$41.5M
| $176K | ﹤0.01% |
386,700
+115,800
| +43% | +$83.3K |
|
4475
PUT
Patria Investments
PAX
$1.72B
| $176K | ﹤0.01% |
15,600
-5,900
| -27% | -$68.8K |
|
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.