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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5601
Algonquin Power & Utilities
AQN
$4.49B
| $64K | ﹤0.01% |
14,508
-11,024
| -43% | -$53.2K |
|
5602
PUT
Arhaus
ARHS
$1.05B
| $64K | ﹤0.01% |
6,900
+5,100
| +283% | +$50K |
|
5603
CALL
BioAtla
BCAB
$5.46M
| $64K | ﹤0.01% |
+2,180
| New | +$183K |
|
5604
CALL
Bank of Hawaii
BOH
$3.15B
| $64K | ﹤0.01% |
900
-600
| -40% | -$43.3K |
|
5605
CALL
BuzzFeed
BZFD
$99M
| $64K | ﹤0.01% |
29,800
+22,200
| +292% | +$69.7K |
|
5606
CALL
Perspective Therapeutics
CATX
$332M
| $64K | ﹤0.01% |
+20,200
| New | +$165K |
|
5607
Gray Television
GTN
$415M
| $64K | ﹤0.01% |
+20,615
| New | +$96.2K |
|
|
LAND
5608
CALL
Gladstone Land Corp
LAND
$350M
| $64K | ﹤0.01% |
5,900
-9,400
| -61% | -$116K |
|
5609
CALL
Liberty Latin America Class C
LILAK
$1.63B
| $64K | ﹤0.01% |
11,110
-3,410
| -23% | -$24.8K |
|
|
MREO
5610
CALL
Mereo BioPharma
MREO
$54.7M
| $64K | ﹤0.01% |
18,300
-45,300
| -71% | -$178K |
|
5611
PUT
Red Rock Resorts
RRR
$3.77B
| $64K | ﹤0.01% |
1,400
-500
| -26% | -$25.4K |
|
5612
PUT
SiTime
SITM
$16B
| $64K | ﹤0.01% |
300
+200
| +200% | +$40.7K |
|
5613
CALL
Sportradar
SRAD
$4.3B
| $64K | ﹤0.01% |
+3,700
| New | +$55.9K |
|
5614
STAG Industrial
STAG
$7.38B
| $64K | ﹤0.01% |
+1,914
| New | +$70K |
|
|
GGRP
5615
CALL
Glimpse Group
GGRP
$18.8M
| $64K | ﹤0.01% |
+26,200
| New | +$29K |
|
|
AAT
5616
CALL
American Assets Trust
AAT
$1.45B
| $63K | ﹤0.01% |
+2,400
| New | +$65.5K |
|
5617
CALL
Abeona Therapeutics
ABEO
$366M
| $63K | ﹤0.01% |
11,400
-16,200
| -59% | -$99.7K |
|
5618
PUT
Allogene Therapeutics
ALLO
$649M
| $63K | ﹤0.01% |
29,800
+800
| +3% | +$1.97K |
|
|
API
5619
CALL
Agora
API
$338M
| $63K | ﹤0.01% |
+15,300
| New | +$62.8K |
|
5620
CALL
CEVA Inc
CEVA
$910M
| $63K | ﹤0.01% |
2,000
+1,600
| +400% | +$44.5K |
|
5621
CALL
Cheniere Energy
CQP
$31.9B
| $63K | ﹤0.01% |
1,200
-4,500
| -79% | -$236K |
|
5622
CALL
Corbus Pharmaceuticals
CRBP
$166M
| $63K | ﹤0.01% |
5,400
-52,700
| -91% | -$884K |
|
|
CVGW
5623
PUT
DELISTED
Calavo Growers
CVGW
| $63K | ﹤0.01% |
2,500
+800
| +47% | +$21.8K |
|
5624
Global E Online
GLBE
$6.6B
| $63K | ﹤0.01% |
+1,156
| New | +$52.3K |
|
|
HEES
5625
PUT
DELISTED
H&E Equipment Services
HEES
| $63K | ﹤0.01% |
+1,300
| New | +$70.8K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.