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 | |
|---|---|---|---|---|---|---|
676
CALL
Automatic Data Processing
ADP
$97.2B
| $18.6M | 0.01% |
63,700
+8,900
| +16% | +$2.63M |
|
677
CALL
Duke Energy
DUK
$99.7B
| $18.6M | 0.01% |
172,400
-35,200
| -17% | -$3.99M |
|
678
PUT
Okta
OKTA
$23.8B
| $18.5M | 0.01% |
235,000
+41,900
| +22% | +$3.25M |
|
679
CALL
Agnico Eagle Mines
AEM
$73.5B
| $18.5M | 0.01% |
236,600
-252,000
| -52% | -$20.8M |
|
680
CALL
Fluor
FLR
$7.21B
| $18.5M | 0.01% |
375,200
+24,800
| +7% | +$1.31M |
|
681
PUT
Petrobras
PBR
$122B
| $18.4M | 0.01% |
1,435,000
-4,900
| -0.3% | -$68.4K |
|
682
Warner Bros
WBD
$64.8B
| $18.4M | 0.01% |
1,741,939
+247,828
| +17% | +$2.3M |
|
|
P
683
CALL
Everpure Inc
P
$24.8B
| $18.4M | 0.01% |
299,300
+10,400
| +4% | +$579K |
|
684
PUT
Sprouts Farmers Market
SFM
$6.95B
| $18.3M | 0.01% |
144,200
+11,200
| +8% | +$1.49M |
|
685
PUT
Interactive Brokers
IBKR
$41.7B
| $18.3M | 0.01% |
414,400
-40,000
| -9% | -$1.68M |
|
686
CALL
Wayfair
W
$11.1B
| $18.2M | 0.01% |
410,200
-149,300
| -27% | -$7.04M |
|
687
PUT
Snap
SNAP
$7.52B
| $18.1M | 0.01% |
1,685,300
-1,646,100
| -49% | -$18.6M |
|
688
PUT
TransDigm Group
TDG
$66.8B
| $18.1M | 0.01% |
14,300
+11,200
| +361% | +$14.8M |
|
689
Bilibili
BILI
$7.4B
| $18.1M | 0.01% |
999,949
+455,712
| +84% | +$9.54M |
|
690
PUT
Li Auto
LI
$12B
| $18.1M | 0.01% |
754,700
-150,600
| -17% | -$3.73M |
|
691
CALL
Bloom Energy
BE
$62.1B
| $18.1M | 0.01% |
813,200
+267,500
| +49% | +$4.69M |
|
692
CALL
PENN Entertainment
PENN
$2.8B
| $18M | 0.01% |
910,600
-599,800
| -40% | -$11.8M |
|
693
CALL
Emerson Electric
EMR
$78.2B
| $18M | 0.01% |
145,500
+45,000
| +45% | +$5.46M |
|
694
PUT
AMC Entertainment Holdings
AMC
$2.01B
| $17.9M | 0.01% |
4,508,100
+828,800
| +23% | +$3.64M |
|
695
Booking.com
BKNG
$138B
| $17.9M | 0.01% |
89,975
-119,425
| -57% | -$23M |
|
696
PUT
Constellation Brands
STZ
$22.6B
| $17.8M | 0.01% |
80,700
-21,800
| -21% | -$5.18M |
|
697
CALL
C.H. Robinson
CHRW
$24.4B
| $17.8M | 0.01% |
171,800
-10,200
| -6% | -$1.1M |
|
|
698
PUT
Agnico Eagle Mines
AEM
$73.5B
| $17.7M | 0.01% |
226,500
-101,000
| -31% | -$8.33M |
|
699
CALL
Truist Financial
TFC
$63.2B
| $17.7M | 0.01% |
407,800
-173,500
| -30% | -$7.74M |
|
700
CALL
CF Industries
CF
$19.6B
| $17.7M | 0.01% |
206,900
+51,800
| +33% | +$4.48M |
|
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.