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 | |
|---|---|---|---|---|---|---|
901
PUT
Emerson Electric
EMR
$81.2B
| $12.3M | 0.01% |
99,400
-15,000
| -13% | -$1.82M |
|
902
CALL
Samsara
IOT
$18.3B
| $12.3M | 0.01% |
281,500
-27,200
| -9% | -$1.34M |
|
903
CALL
Starwood Property Trust
STWD
$6.05B
| $12.3M | 0.01% |
647,700
+126,300
| +24% | +$2.5M |
|
904
PUT
Lattice Semiconductor
LSCC
$18.9B
| $12.3M | 0.01% |
216,300
+95,200
| +79% | +$5.23M |
|
905
PUT
Nutrien
NTR
$32.9B
| $12.2M | 0.01% |
273,400
+59,200
| +28% | +$2.81M |
|
906
CALL
Williams-Sonoma
WSM
$25.7B
| $12.2M | 0.01% |
65,800
+8,900
| +16% | +$1.41M |
|
|
SCIU
907
PUT
DELISTED
Global X Scientific Beta US ETF
SCIU
| $12.2M | 0.01% |
424,000
-14,000
| -3% | -$401K |
|
908
CALL
Peabody Energy
BTU
$2.9B
| $12.1M | 0.01% |
580,200
-387,700
| -40% | -$9.58M |
|
909
CALL
Applied Optoelectronics
AAOI
$8.99B
| $12.1M | 0.01% |
327,500
+207,800
| +174% | +$5.59M |
|
910
CALL
Quanta Services
PWR
$98.1B
| $12M | 0.01% |
38,100
-19,700
| -34% | -$6.34M |
|
911
PUT
Corning
GLW
$134B
| $12M | 0.01% |
253,100
-228,900
| -47% | -$10.8M |
|
912
CALL
Crocs
CROX
$6.58B
| $12M | 0.01% |
109,700
+31,300
| +40% | +$3.64M |
|
913
CALL
Albertsons Companies
ACI
$5.6B
| $12M | 0.01% |
611,700
+420,700
| +220% | +$7.98M |
|
914
CALL
Eos Energy Enterprises
EOSE
$1.32B
| $12M | 0.01% |
2,470,200
+1,019,300
| +70% | +$3.3M |
|
915
PUT
Urban Outfitters
URBN
$5.96B
| $12M | 0.01% |
218,500
+167,800
| +331% | +$7.16M |
|
916
PUT
Motorola Solutions
MSI
$67.6B
| $12M | 0.01% |
25,900
+18,700
| +260% | +$8.87M |
|
917
PUT
BILL Holdings
BILL
$4.11B
| $12M | 0.01% |
141,100
-32,300
| -19% | -$2.41M |
|
|
X
918
DELISTED
US Steel
X
| $11.9M | 0.01% |
350,448
-136,818
| -28% | -$5.05M |
|
919
CALL
Ferrari
RACE
$63.2B
| $11.9M | 0.01% |
28,000
-2,900
| -9% | -$1.31M |
|
920
CALL
Carpenter Technology
CRS
$29.9B
| $11.8M | 0.01% |
69,800
-4,700
| -6% | -$806K |
|
921
CALL
Prologis
PLD
$135B
| $11.8M | 0.01% |
111,900
-83,200
| -43% | -$9.56M |
|
922
CALL
Cinemark Holdings
CNK
$3.82B
| $11.8M | 0.01% |
381,400
-167,500
| -31% | -$5.18M |
|
923
CALL
GE HealthCare
GEHC
$28.2B
| $11.8M | 0.01% |
150,900
-122,500
| -45% | -$10.4M |
|
924
PUT
Suncor Energy
SU
$78.4B
| $11.8M | 0.01% |
330,300
+20,700
| +7% | +$796K |
|
925
CALL
Prudential Financial
PRU
$40.9B
| $11.8M | 0.01% |
99,400
-93,800
| -49% | -$11.6M |
|
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.