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 | |
|---|---|---|---|---|---|---|
4476
PUT
AudioEye
AEYE
$72.1M
| $206K | ﹤0.01% |
13,600
+1,400
| +11% | +$32K |
|
4477
PUT
Brookfield Infrastructure Partners
BIP
$19.5B
| $206K | ﹤0.01% |
6,500
+500
| +8% | +$17.1K |
|
4478
United States Brent Oil Fund
BNO
$779M
| $206K | ﹤0.01% |
6,906
+5,528
| +401% | +$163K |
|
|
BBBY
4479
Bed Bath & Beyond
BBBY
$473M
| $206K | ﹤0.01% |
46,046
+5,981
| +15% | +$38.1K |
|
4480
Helmerich & Payne
HP
$3.34B
| $206K | ﹤0.01% |
+6,444
| New | +$219K |
|
4481
PUT
Inter&Co
INTR
$2.4B
| $206K | ﹤0.01% |
49,000
+38,500
| +367% | +$216K |
|
4482
Tradr 2X Long Innovation ETFShort Innovation Daily ETF
SARK
$45.1M
| $206K | ﹤0.01% |
4,911
+4,567
| +1,328% | +$277K |
|
4483
CALL
Synaptics
SYNA
$4.11B
| $206K | ﹤0.01% |
2,700
+2,500
| +1,250% | +$189K |
|
4484
CALL
Wolverine World Wide
WWW
$1.68B
| $206K | ﹤0.01% |
9,300
+1,800
| +24% | +$36.1K |
|
|
YALA
4485
PUT
Yalla Group
YALA
$817M
| $206K | ﹤0.01% |
50,800
-43,200
| -46% | -$186K |
|
4486
Ameren
AEE
$30.4B
| $205K | ﹤0.01% |
2,309
-3,497
| -60% | -$313K |
|
4487
CALL
Spire Global
SPIR
$408M
| $205K | ﹤0.01% |
14,600
-24,400
| -63% | -$298K |
|
4488
PUT
Tandem Diabetes Care
TNDM
$1.27B
| $205K | ﹤0.01% |
5,700
+200
| +4% | +$6.76K |
|
4489
Paysafe
PSFE
$443M
| $204K | ﹤0.01% |
+11,963
| New | +$242K |
|
4490
CALL
Stem
STEM
$44.4M
| $204K | ﹤0.01% |
16,995
-3,040
| -15% | -$26.2K |
|
4491
PUT
Tenable Holdings
TENB
$3.5B
| $204K | ﹤0.01% |
5,200
-600
| -10% | -$24.9K |
|
|
IRBT
4492
DELISTED
iRobot
IRBT
| $203K | ﹤0.01% |
+26,234
| New | +$210K |
|
4493
CALL
PennantPark Floating Rate Capital
PFLT
$697M
| $203K | ﹤0.01% |
18,600
-14,100
| -43% | -$158K |
|
4494
Sportradar
SRAD
$4.41B
| $203K | ﹤0.01% |
11,738
-30,394
| -72% | -$459K |
|
4495
CALL
Shutterstock
SSTK
$208M
| $203K | ﹤0.01% |
6,700
-8,500
| -56% | -$267K |
|
4496
VEON
VEON
$3.53B
| $203K | ﹤0.01% |
5,087
+5,013
| +6,774% | +$166K |
|
4497
PUT
Babcock & Wilcox
BW
$1.2B
| $202K | ﹤0.01% |
123,300
+5,700
| +5% | +$12.1K |
|
4498
PUT
Fortive
FTV
$18B
| $202K | ﹤0.01% |
3,583
+398
| +12% | +$22.8K |
|
4499
PUT
Jones Lang LaSalle
JLL
$15.8B
| $202K | ﹤0.01% |
800
| – | – |
|
|
LSEA
4500
PUT
DELISTED
Landsea Homes
LSEA
| $202K | ﹤0.01% |
23,900
-9,100
| -28% | -$98.1K |
|
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.