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 | |
|---|---|---|---|---|---|---|
2501
CALL
Equinox Gold
EQX
$7.32B
| $1.45M | ﹤0.01% |
287,900
+72,400
| +34% | +$405K |
|
2502
First Majestic Silver
AG
$8.05B
| $1.44M | ﹤0.01% |
263,192
+96,518
| +58% | +$623K |
|
2503
Morgan Stanley
MS
$337B
| $1.44M | ﹤0.01% |
+11,472
| New | +$1.41M |
|
2504
Teladoc Health
TDOC
$1.58B
| $1.44M | ﹤0.01% |
158,080
+83,024
| +111% | +$802K |
|
2505
CALL
M/I Homes
MHO
$3.83B
| $1.44M | ﹤0.01% |
10,800
+3,200
| +42% | +$504K |
|
2506
PUT
Sphere Entertainment
SPHR
$4.88B
| $1.44M | ﹤0.01% |
35,600
-168,600
| -83% | -$7.05M |
|
2507
CALL
Cogent Communications
CCOI
$594M
| $1.43M | ﹤0.01% |
18,600
-111,300
| -86% | -$8.87M |
|
2508
PUT
Verisk Analytics
VRSK
$26.4B
| $1.43M | ﹤0.01% |
5,200
+2,200
| +73% | +$612K |
|
2509
CALL
Aurinia Pharmaceuticals
AUPH
$1.97B
| $1.43M | ﹤0.01% |
159,200
-6,300
| -4% | -$51.4K |
|
2510
PUT
Casey's General Stores
CASY
$31.9B
| $1.43M | ﹤0.01% |
3,600
-5,100
| -59% | -$2.05M |
|
2511
CALL
Viatris
VTRS
$20.1B
| $1.43M | ﹤0.01% |
114,600
-41,500
| -27% | -$510K |
|
|
AMED
2512
PUT
DELISTED
Amedisys
AMED
| $1.43M | ﹤0.01% |
15,700
+9,400
| +149% | +$863K |
|
2513
CALL
Globalstar
GSAT
$10.2B
| $1.42M | ﹤0.01% |
45,873
+25,353
| +124% | +$627K |
|
2514
GSK
GSK
$103B
| $1.42M | ﹤0.01% |
+42,113
| New | +$1.52M |
|
2515
Scholar Rock
SRRK
$5.71B
| $1.42M | ﹤0.01% |
+32,955
| New | +$1.07M |
|
2516
CALL
Newell Brands
NWL
$2.16B
| $1.42M | ﹤0.01% |
142,800
-17,700
| -11% | -$161K |
|
2517
CALL
Roivant Sciences
ROIV
$25.2B
| $1.42M | ﹤0.01% |
120,000
+1,700
| +1% | +$20.1K |
|
2518
PUT
Magnite
MGNI
$2.65B
| $1.42M | ﹤0.01% |
89,100
+35,600
| +67% | +$522K |
|
2519
PUT
Sterling Infrastructure
STRL
$20.3B
| $1.41M | ﹤0.01% |
8,400
+4,300
| +105% | +$743K |
|
2520
CALL
TAL Education Group
TAL
$5.71B
| $1.41M | ﹤0.01% |
141,100
-32,400
| -19% | -$341K |
|
2521
Veralto
VLTO
$22.6B
| $1.41M | ﹤0.01% |
+13,869
| New | +$1.48M |
|
|
VISN
2522
PUT
Vistance Networks Inc
VISN
$2.66B
| $1.41M | ﹤0.01% |
270,600
-43,000
| -14% | -$241K |
|
2523
CALL
Trimble
TRMB
$12.3B
| $1.41M | ﹤0.01% |
19,900
-33,100
| -62% | -$2.25M |
|
|
VSXY
2524
Victoria's Secret
VSXY
$6.64B
| $1.41M | ﹤0.01% |
33,963
-125,627
| -79% | -$4.44M |
|
|
TPC
2525
CALL
Tutor Perini Cor
TPC
$4.57B
| $1.41M | ﹤0.01% |
58,100
-22,000
| -27% | -$598K |
|
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.