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 | |
|---|---|---|---|---|---|---|
|
FITB
976
CALL
Fifth Third Bancorp
FITB
$51.8B
| $10.9M | 0.01% |
257,200
+7,200
| +3% | +$323K |
|
977
Meta Platforms (Facebook)
META
$1.54T
| $10.9M | 0.01% |
+18,551
| New | +$10.9M |
|
978
Albemarle
ALB
$13.8B
| $10.9M | 0.01% |
126,075
-44,141
| -26% | -$4.4M |
|
979
Las Vegas Sands
LVS
$30.5B
| $10.8M | 0.01% |
210,436
+17,864
| +9% | +$926K |
|
980
CALL
Bath & Body Works
BBWI
$3.9B
| $10.8M | 0.01% |
278,600
+93,700
| +51% | +$3.13M |
|
981
CALL
Maplebear
CART
$10B
| $10.8M | 0.01% |
260,200
+63,400
| +32% | +$2.75M |
|
982
CALL
Enovix
ENVX
$947M
| $10.8M | 0.01% |
1,131,314
+2,285
| +0.2% | +$20.1K |
|
983
PUT
Cadence Design Systems
CDNS
$91.1B
| $10.8M | 0.01% |
35,800
-48,800
| -58% | -$14.2M |
|
984
PUT
CME Group
CME
$91.9B
| $10.8M | 0.01% |
46,300
-16,600
| -26% | -$3.82M |
|
985
JD.com
JD
$40.6B
| $10.7M | 0.01% |
309,667
+277,804
| +872% | +$10.8M |
|
986
CALL
NRG Energy
NRG
$30.2B
| $10.7M | 0.01% |
118,900
-212,900
| -64% | -$19.7M |
|
987
PUT
Carrier Global
CARR
$57.4B
| $10.7M | 0.01% |
157,000
+126,600
| +416% | +$9.55M |
|
988
PUT
Trane Technologies
TT
$106B
| $10.7M | 0.01% |
29,000
+20,900
| +258% | +$8.3M |
|
989
PUT
FTAI Aviation
FTAI
$22.2B
| $10.7M | 0.01% |
74,300
-45,400
| -38% | -$6.69M |
|
990
CALL
Global Payments
GPN
$21.3B
| $10.7M | 0.01% |
95,500
-345,900
| -78% | -$37.8M |
|
991
CALL
Cardinal Health
CAH
$52.9B
| $10.7M | 0.01% |
90,200
-12,100
| -12% | -$1.41M |
|
992
CALL
Biogen
BIIB
$29.6B
| $10.7M | 0.01% |
69,700
+16,500
| +31% | +$2.78M |
|
993
VanEck Gold Miners ETF
GDX
$22.9B
| $10.7M | 0.01% |
314,070
-149,035
| -32% | -$5.72M |
|
994
PUT
Williams Companies
WMB
$92B
| $10.7M | 0.01% |
196,800
+65,700
| +50% | +$3.54M |
|
995
CALL
TC Energy
TRP
$72.9B
| $10.6M | 0.01% |
241,300
+204,200
| +550% | +$9.66M |
|
996
CALL
Schwab US Broad Market ETF
SCHB
$42.7B
| $10.6M | 0.01% |
396,600
-289,800
| -42% | -$6.62M |
|
997
PUT
Nice
NICE
$5.09B
| $10.6M | 0.01% |
62,200
-21,900
| -26% | -$3.9M |
|
998
PUT
Johnson Controls International
JCI
$87.4B
| $10.6M | 0.01% |
133,700
-56,400
| -30% | -$4.52M |
|
999
Marathon Digital Holdings
MARA
$4.87B
| $10.6M | 0.01% |
629,246
-11,919
| -2% | -$241K |
|
1000
PUT
Cencora
COR
$59.4B
| $10.5M | 0.01% |
46,900
-80,200
| -63% | -$18.9M |
|
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.