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 | |
|---|---|---|---|---|---|---|
2601
Vital Farms
VITL
$558M
| $1.29M | ﹤0.01% |
34,275
-19,813
| -37% | -$705K |
|
2602
CALL
Halozyme
HALO
$9.72B
| $1.29M | ﹤0.01% |
27,000
-22,500
| -45% | -$1.15M |
|
2603
Intellia Therapeutics
NTLA
$1.5B
| $1.29M | ﹤0.01% |
110,531
+31,537
| +40% | +$492K |
|
2604
CALL
QuidelOrtho
QDEL
$1.09B
| $1.29M | ﹤0.01% |
28,900
+7,000
| +32% | +$286K |
|
2605
CALL
Flywire
FLYW
$1.96B
| $1.28M | ﹤0.01% |
62,300
-24,700
| -28% | -$483K |
|
2606
Cal-Maine
CALM
$4.28B
| $1.28M | ﹤0.01% |
+12,429
| New | +$1.17M |
|
2607
CALL
Rapid7
RPD
$634M
| $1.28M | ﹤0.01% |
31,800
-10,000
| -24% | -$406K |
|
|
QXO
2608
CALL
QXO Inc
QXO
$14.2B
| $1.28M | ﹤0.01% |
80,500
+60,100
| +295% | +$946K |
|
2609
CALL
Compass
COMP
$8.27B
| $1.28M | ﹤0.01% |
218,600
-346,400
| -61% | -$2.19M |
|
2610
PUT
Listed Funds Trust Roundhill Magnificent Seven ETF
MAGS
$3.91B
| $1.28M | ﹤0.01% |
23,500
-1,600
| -6% | -$82.1K |
|
2611
PUT
Sun Communities
SUI
$15B
| $1.28M | ﹤0.01% |
10,400
+8,400
| +420% | +$1.08M |
|
2612
PUT
Unum
UNM
$13.8B
| $1.28M | ﹤0.01% |
17,500
+7,400
| +73% | +$510K |
|
|
JKS
2613
PUT
JinkoSolar
JKS
$775M
| $1.28M | ﹤0.01% |
51,300
+23,300
| +83% | +$569K |
|
2614
CALL
Rithm Capital
RITM
$5.09B
| $1.27M | ﹤0.01% |
117,800
+38,400
| +48% | +$416K |
|
2615
CALL
DoubleVerify
DV
$1.62B
| $1.27M | ﹤0.01% |
66,100
-18,300
| -22% | -$345K |
|
2616
CALL
Cooper Companies
COO
$13.7B
| $1.27M | ﹤0.01% |
13,800
-8,800
| -39% | -$896K |
|
2617
CALL
Cerence
CRNC
$382M
| $1.27M | ﹤0.01% |
161,500
+67,500
| +72% | +$339K |
|
|
ORC
2618
PUT
Orchid Island Capital
ORC
$1.31B
| $1.27M | ﹤0.01% |
162,900
-4,600
| -3% | -$36.2K |
|
2619
CALL
Warby Parker
WRBY
$3.01B
| $1.27M | ﹤0.01% |
52,300
+6,600
| +14% | +$135K |
|
|
PTIR
2620
GraniteShares 2x Long PLTR Daily ETF
PTIR
$253M
| $1.27M | ﹤0.01% |
+144,855
| New | +$833K |
|
|
AZUL
2621
CALL
DELISTED
Azul
AZUL
| $1.26M | ﹤0.01% |
756,900
+559,700
| +284% | +$1.46M |
|
2622
Organon & Co
OGN
$3.55B
| $1.26M | ﹤0.01% |
84,541
-7,606
| -8% | -$124K |
|
2623
CALL
Inspire Medical Systems
INSP
$1.42B
| $1.26M | ﹤0.01% |
6,800
-24,900
| -79% | -$4.83M |
|
2624
CALL
Vanguard FTSE Developed Markets ETF
VEA
$226B
| $1.26M | ﹤0.01% |
26,300
-30,700
| -54% | -$1.54M |
|
2625
CALL
Ardelyx
ARDX
$1.24B
| $1.26M | ﹤0.01% |
247,900
-54,300
| -18% | -$300K |
|
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.