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 | |
|---|---|---|---|---|---|---|
1576
Canadian Pacific Kansas City
CP
$82B
| $4.38M | ﹤0.01% |
+60,569
| New | +$4.67M |
|
1577
Restaurant Brands International
QSR
$25.1B
| $4.38M | ﹤0.01% |
67,247
+51,092
| +316% | +$3.54M |
|
1578
PUT
Doximity
DOCS
$3.67B
| $4.38M | ﹤0.01% |
82,000
-21,000
| -20% | -$1.03M |
|
|
SKX
1579
PUT
DELISTED
Skechers
SKX
| $4.38M | ﹤0.01% |
65,100
-5,200
| -7% | -$337K |
|
|
IPG
1580
CALL
DELISTED
Interpublic Group of Companies
IPG
| $4.37M | ﹤0.01% |
156,100
+4,100
| +3% | +$122K |
|
1581
PUT
Corebridge Financial
CRBG
$14.1B
| $4.36M | ﹤0.01% |
145,800
+104,500
| +253% | +$3.22M |
|
|
RDFN
1582
CALL
DELISTED
Redfin
RDFN
| $4.36M | ﹤0.01% |
553,800
-277,500
| -33% | -$2.69M |
|
1583
CALL
Alexandria Real Estate Equities
ARE
$8.88B
| $4.35M | ﹤0.01% |
44,600
-11,700
| -21% | -$1.28M |
|
1584
CAVA Group
CAVA
$7.22B
| $4.34M | ﹤0.01% |
+38,526
| New | +$5.14M |
|
1585
CALL
Universal Display
OLED
$3.71B
| $4.34M | ﹤0.01% |
29,700
+2,400
| +9% | +$427K |
|
1586
Mercado Libre
MELI
$91.3B
| $4.34M | ﹤0.01% |
+2,552
| New | +$4.97M |
|
1587
PUT
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.5M
| $4.33M | ﹤0.01% |
170,100
-205,300
| -55% | -$19.2M |
|
1588
Moderna
MRNA
$21.5B
| $4.33M | ﹤0.01% |
+104,203
| New | +$4.98M |
|
1589
PUT
Hasbro
HAS
$12.6B
| $4.33M | ﹤0.01% |
77,400
+3,800
| +5% | +$248K |
|
1590
CALL
Mirion Technologies
MIR
$4.05B
| $4.32M | ﹤0.01% |
247,700
+247,300
| +61,825% | +$3.84M |
|
1591
PUT
Fluor
FLR
$7.29B
| $4.32M | ﹤0.01% |
87,500
+12,500
| +17% | +$659K |
|
|
SUM
1592
CALL
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $4.31M | ﹤0.01% |
85,100
+83,700
| +5,979% | +$3.91M |
|
1593
CALL
Natera
NTRA
$37.5B
| $4.3M | ﹤0.01% |
27,200
+21,300
| +361% | +$3.1M |
|
1594
CALL
Matador Resources
MTDR
$6.31B
| $4.3M | ﹤0.01% |
76,500
-54,700
| -42% | -$3.01M |
|
1595
APA Corp
APA
$12.8B
| $4.28M | ﹤0.01% |
185,289
+107,769
| +139% | +$2.52M |
|
1596
ProShares UltraPro Short QQQ
SQQQ
$2.21B
| $4.27M | ﹤0.01% |
27,424
+9,283
| +51% | +$1.55M |
|
1597
PUT
Wheaton Precious Metals
WPM
$50.6B
| $4.27M | ﹤0.01% |
75,900
-10,500
| -12% | -$650K |
|
1598
PUT
Logitech
LOGI
$15.2B
| $4.26M | ﹤0.01% |
51,800
-8,000
| -13% | -$663K |
|
|
GPGI
1599
CALL
GPGI Inc
GPGI
$4.06B
| $4.25M | ﹤0.01% |
334,230
+121,242
| +57% | +$1.53M |
|
1600
PUT
Darling Ingredients
DAR
$9.93B
| $4.25M | ﹤0.01% |
126,200
-83,400
| -40% | -$3.15M |
|
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.