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 | |
|---|---|---|---|---|---|---|
2401
PNC Financial Services
PNC
$100B
| $1.58M | ﹤0.01% |
+8,219
| New | +$1.62M |
|
2402
D-Wave Quantum
QBTS
$6B
| $1.58M | ﹤0.01% |
187,924
+83,108
| +79% | +$249K |
|
2403
DHT Holdings
DHT
$2.97B
| $1.58M | ﹤0.01% |
169,823
+144,061
| +559% | +$1.48M |
|
2404
CALL
Forward Air
FWRD
$482M
| $1.58M | ﹤0.01% |
48,900
-166,600
| -77% | -$5.81M |
|
2405
Shopify
SHOP
$148B
| $1.57M | ﹤0.01% |
14,814
+14,247
| +2,513% | +$1.39M |
|
2406
CALL
Rentokil
RTO
$14.3B
| $1.57M | ﹤0.01% |
62,200
-78,600
| -56% | -$1.99M |
|
2407
Liberty Global Class A
LBTYA
$3.31B
| $1.57M | ﹤0.01% |
123,139
+58,050
| +89% | +$968K |
|
2408
Corning
GLW
$126B
| $1.57M | ﹤0.01% |
33,029
+23,777
| +257% | +$1.13M |
|
2409
CALL
Penumbra
PEN
$12.5B
| $1.57M | ﹤0.01% |
6,600
-19,600
| -75% | -$4.46M |
|
2410
CALL
Flowserve
FLS
$9.25B
| $1.56M | ﹤0.01% |
27,200
+14,700
| +118% | +$844K |
|
2411
CALL
Unum
UNM
$13.8B
| $1.56M | ﹤0.01% |
21,400
+4,400
| +26% | +$303K |
|
|
MAGN
2412
CALL
Magnera Corp
MAGN
$488M
| $1.56M | ﹤0.01% |
86,000
+83,292
| +3,076% | +$1.7M |
|
2413
CALL
Waters Corp
WAT
$36.8B
| $1.56M | ﹤0.01% |
4,200
-4,200
| -50% | -$1.54M |
|
2414
CALL
United Natural Foods
UNFI
$3.01B
| $1.56M | ﹤0.01% |
57,000
-44,400
| -44% | -$1.02M |
|
2415
American Tower
AMT
$77.7B
| $1.55M | ﹤0.01% |
+8,471
| New | +$1.76M |
|
|
DQ
2416
CALL
Daqo New Energy
DQ
$790M
| $1.55M | ﹤0.01% |
79,900
-7,000
| -8% | -$143K |
|
2417
FirstCash
FCFS
$8.55B
| $1.55M | ﹤0.01% |
14,977
-919
| -6% | -$99K |
|
|
OPTU
2418
Optimum Communications Inc
OPTU
$316M
| $1.55M | ﹤0.01% |
642,399
-2,249
| -0.3% | -$5.61K |
|
2419
CALL
Neumora Therapeutics
NMRA
$276M
| $1.55M | ﹤0.01% |
146,100
+63,700
| +77% | +$763K |
|
2420
PUT
Weibo
WB
$1.9B
| $1.55M | ﹤0.01% |
162,000
+4,000
| +3% | +$38.3K |
|
2421
Harley-Davidson
HOG
$2.68B
| $1.54M | ﹤0.01% |
+51,287
| New | +$1.7M |
|
2422
CALL
1st Source
SRCE
$2.07B
| $1.54M | ﹤0.01% |
26,400
-2,700
| -9% | -$167K |
|
|
SA
2423
CALL
Seabridge Gold
SA
$2.8B
| $1.54M | ﹤0.01% |
135,000
+25,400
| +23% | +$391K |
|
2424
CALL
Core & Main
CNM
$8.17B
| $1.54M | ﹤0.01% |
30,200
+22,100
| +273% | +$1.04M |
|
2425
CALL
Host Hotels & Resorts
HST
$16.8B
| $1.54M | ﹤0.01% |
87,700
-47,400
| -35% | -$851K |
|
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.