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 | |
|---|---|---|---|---|---|---|
2326
ICICI Bank
IBN
$106B
| $1.73M | ﹤0.01% |
+58,070
| New | +$1.75M |
|
2327
PUT
FS KKR Capital
FSK
$2.98B
| $1.73M | ﹤0.01% |
79,600
+13,800
| +21% | +$290K |
|
2328
Jack in the Box
JACK
$278M
| $1.73M | ﹤0.01% |
41,515
+34,267
| +473% | +$1.58M |
|
2329
PUT
JPMorgan Inflation Managed Bond ETF
JCPI
$865M
| $1.73M | ﹤0.01% |
30,600
-18,000
| -37% | -$850K |
|
2330
Annaly Capital Management
NLY
$16.9B
| $1.73M | ﹤0.01% |
94,292
-7,742
| -8% | -$151K |
|
2331
ProShares UltraShort Bloomberg Natural Gas
KOLD
$110M
| $1.72M | ﹤0.01% |
40,332
-45,498
| -53% | -$2.96M |
|
|
HIMX
2332
CALL
Himax Technologies
HIMX
$2.2B
| $1.72M | ﹤0.01% |
214,200
+183,700
| +602% | +$1.16M |
|
2333
CALL
Biomea Fusion
BMEA
$90.4M
| $1.72M | ﹤0.01% |
443,200
+236,300
| +114% | +$1.88M |
|
2334
PUT
Xerox
XRX
$337M
| $1.72M | ﹤0.01% |
203,800
+28,400
| +16% | +$262K |
|
2335
PUT
VeriSign
VRSN
$25.3B
| $1.72M | ﹤0.01% |
8,300
-27,700
| -77% | -$5.22M |
|
2336
CALL
Procept Biorobotics
PRCT
$950M
| $1.72M | ﹤0.01% |
21,300
+9,300
| +78% | +$795K |
|
2337
PUT
American Superconductor
AMSC
$1.48B
| $1.71M | ﹤0.01% |
69,600
+10,800
| +18% | +$298K |
|
2338
PUT
F5
FFIV
$22.1B
| $1.71M | ﹤0.01% |
6,800
-100
| -1% | -$23.9K |
|
2339
PUT
Northern Oil and Gas
NOG
$2.3B
| $1.71M | ﹤0.01% |
46,000
+28,800
| +167% | +$1.13M |
|
2340
CALL
MannKind Corp
MNKD
$1.28B
| $1.71M | ﹤0.01% |
265,300
+34,200
| +15% | +$229K |
|
2341
CALL
Xylem
XYL
$28.5B
| $1.71M | ﹤0.01% |
14,700
-1,600
| -10% | -$202K |
|
2342
Planet Fitness
PLNT
$4.23B
| $1.7M | ﹤0.01% |
17,242
+8,679
| +101% | +$792K |
|
2343
CorMedix
CRMD
$617M
| $1.7M | ﹤0.01% |
210,356
-10,961
| -5% | -$109K |
|
2344
CALL
Jefferies Financial Group
JEF
$12.9B
| $1.7M | ﹤0.01% |
21,700
-20,500
| -49% | -$1.47M |
|
2345
Darling Ingredients
DAR
$9.93B
| $1.7M | ﹤0.01% |
50,418
-659
| -1% | -$24.9K |
|
2346
CALL
Aehr Test Systems
AEHR
$2.48B
| $1.7M | ﹤0.01% |
102,000
+9,400
| +10% | +$125K |
|
|
LAC
2347
CALL
Lithium Americas
LAC
$986M
| $1.7M | ﹤0.01% |
581,300
+389,500
| +203% | +$1.35M |
|
2348
PUT
Scotiabank
BNS
$106B
| $1.69M | ﹤0.01% |
31,500
-94,000
| -75% | -$5.08M |
|
2349
Patterson-UTI
PTEN
$3.87B
| $1.69M | ﹤0.01% |
204,796
+127,747
| +166% | +$1.02M |
|
2350
Upwork
UPWK
$1.09B
| $1.69M | ﹤0.01% |
103,389
+49,615
| +92% | +$715K |
|
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.