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 | |
|---|---|---|---|---|---|---|
5476
PUT
Cooper-Standard Automotive
CPS
$523M
| $73K | ﹤0.01% |
5,400
+2,100
| +64% | +$30K |
|
5477
PUT
Invesco CurrencyShares Australian Dollar Trust
FXA
$97.6M
| $73K | ﹤0.01% |
+1,200
| New | +$77.6K |
|
5478
CALL
Kopin
KOPN
$652M
| $73K | ﹤0.01% |
54,100
-8,500
| -14% | -$8.16K |
|
5479
PUT
Seres Therapeutics
MCRB
$46.8M
| $73K | ﹤0.01% |
4,395
-1,010
| -19% | -$16.4K |
|
5480
CALL
Navient
NAVI
$789M
| $73K | ﹤0.01% |
5,500
-23,600
| -81% | -$353K |
|
|
SCS
5481
CALL
DELISTED
Steelcase
SCS
| $73K | ﹤0.01% |
6,200
-9,800
| -61% | -$126K |
|
5482
CALL
Universal Insurance Holdings
UVE
$1.22B
| $73K | ﹤0.01% |
3,500
+2,500
| +250% | +$52.3K |
|
5483
PUT
ASP Isotopes
ASPI
$504M
| $72K | ﹤0.01% |
+16,100
| New | +$85.7K |
|
5484
BellRing Brands
BRBR
$1.44B
| $72K | ﹤0.01% |
+960
| New | +$68.2K |
|
|
KW
5485
CALL
DELISTED
Kennedy-Wilson Holdings
KW
| $72K | ﹤0.01% |
7,300
+3,800
| +109% | +$41.5K |
|
5486
NGL Energy Partners
NGL
$2.05B
| $72K | ﹤0.01% |
14,507
+5,941
| +69% | +$26.6K |
|
5487
CALL
Odyssey Marine Exploration
OMEX
$34.9M
| $72K | ﹤0.01% |
100,200
+10,400
| +12% | +$5.27K |
|
5488
CALL
Pliant Therapeutics
PLRX
$64.4M
| $72K | ﹤0.01% |
5,500
-3,100
| -36% | -$42.3K |
|
5489
CALL
PTC Therapeutics
PTCT
$5.68B
| $72K | ﹤0.01% |
+1,600
| New | +$68.5K |
|
5490
Tidal Trust II Defiance Nasdaq 100 Weekly Distribution ETF
QQQY
$181M
| $72K | ﹤0.01% |
+2,342
| New | +$78.3K |
|
5491
Royal Gold
RGLD
$16.8B
| $72K | ﹤0.01% |
552
-3,775
| -87% | -$545K |
|
5492
United States Gasoline Fund
UGA
$142M
| $72K | ﹤0.01% |
+1,157
| New | +$71.5K |
|
5493
CALL
Aquestive Therapeutics
AQST
$463M
| $71K | ﹤0.01% |
20,200
-64,700
| -76% | -$298K |
|
5494
PUT
Ashland
ASH
$3.33B
| $71K | ﹤0.01% |
+1,000
| New | +$80K |
|
5495
PUT
Boise Cascade
BCC
$2.69B
| $71K | ﹤0.01% |
600
-3,200
| -84% | -$442K |
|
|
COOP
5496
DELISTED
Mr. Cooper
COOP
| $71K | ﹤0.01% |
743
-1,768
| -70% | -$168K |
|
5497
CALL
Golub Capital BDC
GBDC
$3.34B
| $71K | ﹤0.01% |
4,700
-10,700
| -69% | -$163K |
|
5498
Gaotu Techedu
GOTU
$434M
| $71K | ﹤0.01% |
32,627
-97,222
| -75% | -$283K |
|
5499
Ivanhoe Electric
IE
$1.45B
| $71K | ﹤0.01% |
9,499
-2,536
| -21% | -$23.4K |
|
5500
CALL
Koppers
KOP
$943M
| $71K | ﹤0.01% |
+2,200
| New | +$78.6K |
|
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.