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 | |
|---|---|---|---|---|---|---|
2451
Gold Fields
GFI
$29.2B
| $1.51M | ﹤0.01% |
114,605
+54,823
| +92% | +$835K |
|
2452
CALL
Autoliv
ALV
$8.6B
| $1.51M | ﹤0.01% |
16,100
+5,000
| +45% | +$481K |
|
|
PBT
2453
PUT
Permian Basin Royalty Trust
PBT
$1.36B
| $1.5M | ﹤0.01% |
135,900
+133,500
| +5,563% | +$1.6M |
|
2454
Under Armour
UAA
$3B
| $1.5M | ﹤0.01% |
181,541
+6,059
| +3% | +$55.4K |
|
2455
Citizens Financial Group
CFG
$30.4B
| $1.5M | ﹤0.01% |
34,340
-45,701
| -57% | -$2.02M |
|
2456
CALL
Fluence Energy
FLNC
$1.78B
| $1.5M | ﹤0.01% |
94,500
-47,800
| -34% | -$936K |
|
2457
PUT
Ginkgo Bioworks
DNA
$481M
| $1.5M | ﹤0.01% |
152,700
+1,500
| +1% | +$12.9K |
|
|
PDCO
2458
CALL
DELISTED
Patterson Companies, Inc.
PDCO
| $1.5M | ﹤0.01% |
48,500
+37,700
| +349% | +$876K |
|
2459
CALL
Caleres
CAL
$396M
| $1.49M | ﹤0.01% |
64,400
-11,700
| -15% | -$343K |
|
|
VISN
2460
CALL
Vistance Networks Inc
VISN
$2.66B
| $1.49M | ﹤0.01% |
286,200
-108,100
| -27% | -$605K |
|
|
HCP
2461
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $1.49M | ﹤0.01% |
43,581
+6,540
| +18% | +$222K |
|
2462
CALL
CVR Energy
CVI
$3.36B
| $1.49M | ﹤0.01% |
79,400
-35,300
| -31% | -$714K |
|
2463
CALL
Ericsson
ERIC
$30.7B
| $1.49M | ﹤0.01% |
184,400
+12,700
| +7% | +$103K |
|
2464
SoundHound AI
SOUN
$2.68B
| $1.48M | ﹤0.01% |
+74,731
| New | +$720K |
|
|
2465
PUT
Autoliv
ALV
$8.6B
| $1.48M | ﹤0.01% |
15,800
+4,800
| +44% | +$461K |
|
2466
PUT
Sundial Growers
SNDL
$325M
| $1.48M | ﹤0.01% |
824,900
+132,900
| +19% | +$261K |
|
2467
Parsons
PSN
$6.28B
| $1.48M | ﹤0.01% |
+15,991
| New | +$1.63M |
|
2468
PUT
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $1.48M | ﹤0.01% |
31,200
+12,100
| +63% | +$490K |
|
2469
PUT
Sempra
SRE
$60.8B
| $1.47M | ﹤0.01% |
16,800
+2,600
| +18% | +$228K |
|
2470
Comstock Resources
CRK
$3.97B
| $1.47M | ﹤0.01% |
80,836
+43,608
| +117% | +$604K |
|
2471
PUT
InterDigital
IDCC
$6.68B
| $1.47M | ﹤0.01% |
7,600
-9,800
| -56% | -$1.71M |
|
|
ALTR
2472
CALL
DELISTED
Altair Engineering Inc
ALTR
| $1.47M | ﹤0.01% |
13,500
+9,300
| +221% | +$959K |
|
|
HTGCR
2473
CALL
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $1.47M | ﹤0.01% |
73,300
-52,900
| -42% | -$1.06M |
|
2474
PUT
Funko
FNKO
$323M
| $1.47M | ﹤0.01% |
109,900
-6,900
| -6% | -$81.1K |
|
2475
CALL
Chemours
CC
$2.59B
| $1.47M | ﹤0.01% |
87,000
-48,800
| -36% | -$949K |
|
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.