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 | |
|---|---|---|---|---|---|---|
1451
CALL
Exelon
EXC
$48.6B
| $5.2M | ﹤0.01% |
138,200
-169,300
| -55% | -$6.57M |
|
1452
PUT
Polaris
PII
$4.15B
| $5.2M | ﹤0.01% |
90,200
+69,200
| +330% | +$4.81M |
|
1453
CALL
Noble Corp
NE
$6.9B
| $5.2M | ﹤0.01% |
165,500
+50,300
| +44% | +$1.66M |
|
|
COOP
1454
CALL
DELISTED
Mr. Cooper
COOP
| $5.19M | ﹤0.01% |
54,100
+34,100
| +171% | +$3.24M |
|
1455
PUT
Invesco S&P SmallCap Low Volatility ETF
XSLV
$249M
| $5.19M | ﹤0.01% |
164,000
-78,800
| -32% | -$3.85M |
|
1456
PUT
Globe Life
GL
$13.5B
| $5.16M | ﹤0.01% |
46,300
-54,200
| -54% | -$5.85M |
|
1457
CALL
Keysight
KEYS
$54.5B
| $5.16M | ﹤0.01% |
32,100
+27,100
| +542% | +$4.37M |
|
1458
PUT
QuantumScape Corp
QS
$3B
| $5.16M | ﹤0.01% |
993,600
+239,500
| +32% | +$1.26M |
|
1459
PUT
Carbon Collective Climate Solutions US Equity ETF
CCSO
$45.3M
| $5.15M | ﹤0.01% |
242,400
+40,600
| +20% | +$856K |
|
1460
PUT
General Mills
GIS
$19.2B
| $5.15M | ﹤0.01% |
80,700
-35,800
| -31% | -$2.4M |
|
1461
PUT
GSK
GSK
$103B
| $5.14M | ﹤0.01% |
152,100
-17,700
| -10% | -$637K |
|
1462
Biogen
BIIB
$29.9B
| $5.13M | ﹤0.01% |
33,542
-19,576
| -37% | -$3.3M |
|
1463
CALL
Avantor
AVTR
$7.81B
| $5.13M | ﹤0.01% |
243,300
+19,700
| +9% | +$443K |
|
1464
CALL
dLocal
DLO
$4.26B
| $5.13M | ﹤0.01% |
455,200
+48,900
| +12% | +$492K |
|
1465
CALL
Diageo
DEO
$46.2B
| $5.11M | ﹤0.01% |
40,200
+16,800
| +72% | +$2.14M |
|
1466
CALL
Honda
HMC
$36.5B
| $5.11M | ﹤0.01% |
178,900
+58,700
| +49% | +$1.66M |
|
|
VSXY
1467
CALL
Victoria's Secret
VSXY
$6.64B
| $5.1M | ﹤0.01% |
123,200
-3,300
| -3% | -$117K |
|
1468
PUT
Bumble
BMBL
$367M
| $5.08M | ﹤0.01% |
624,000
-47,600
| -7% | -$367K |
|
1469
PUT
ArcBest
ARCB
$3.44B
| $5.07M | ﹤0.01% |
54,300
+100
| +0.2% | +$10.6K |
|
1470
CALL
Fiverr
FVRR
$376M
| $5.06M | ﹤0.01% |
159,400
+29,100
| +22% | +$845K |
|
1471
Synchrony
SYF
$23.7B
| $5.06M | ﹤0.01% |
77,815
-11,312
| -13% | -$692K |
|
1472
CALL
Brinker International
EAT
$8.02B
| $5.05M | ﹤0.01% |
38,200
-52,200
| -58% | -$5.87M |
|
1473
PUT
Build-A-Bear
BBW
$423M
| $5.04M | ﹤0.01% |
109,500
+109,200
| +36,400% | +$4.24M |
|
1474
CALL
Klaviyo
KVYO
$4.91B
| $5.03M | ﹤0.01% |
121,900
-78,700
| -39% | -$3.01M |
|
1475
PUT
Floor & Decor
FND
$5.81B
| $5.02M | ﹤0.01% |
50,400
-118,700
| -70% | -$12.8M |
|
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.