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 | |
|---|---|---|---|---|---|---|
726
PUT
Teradyne
TER
$57.8B
| $16.7M | 0.01% |
132,900
+85,000
| +177% | +$10.1M |
|
727
CALL
Antero Resources
AR
$10.9B
| $16.7M | 0.01% |
477,100
+65,100
| +16% | +$1.97M |
|
728
CALL
United States Oil Fund
USO
$2.36B
| $16.7M | 0.01% |
220,500
+155,900
| +241% | +$11.4M |
|
729
PUT
AutoZone
AZO
$48.5B
| $16.6M | 0.01% |
5,200
+800
| +18% | +$2.53M |
|
730
PUT
SL Green Realty
SLG
$3.56B
| $16.6M | 0.01% |
245,000
+41,200
| +20% | +$3.05M |
|
731
CALL
Viking Therapeutics
VKTX
$4.33B
| $16.6M | 0.01% |
413,500
-160,200
| -28% | -$9.13M |
|
732
PUT
Nu Holdings
NU
$70.1B
| $16.6M | 0.01% |
1,602,500
+406,900
| +34% | +$5.41M |
|
733
CALL
Mondelez International
MDLZ
$78.1B
| $16.6M | 0.01% |
277,900
+45,900
| +20% | +$3.04M |
|
734
CALL
Nutanix
NTNX
$14.4B
| $16.6M | 0.01% |
270,600
+10,100
| +4% | +$660K |
|
735
PUT
Pultegroup
PHM
$24.1B
| $16.6M | 0.01% |
152,000
-6,400
| -4% | -$831K |
|
736
PUT
KLA
KLAC
$280B
| $16.5M | 0.01% |
262,000
+45,000
| +21% | +$3.04M |
|
737
Devon Energy
DVN
$51.8B
| $16.5M | 0.01% |
+503,840
| New | +$19M |
|
738
PUT
PNC Financial Services
PNC
$101B
| $16.5M | 0.01% |
85,500
-20,200
| -19% | -$3.97M |
|
739
CALL
Electronic Arts
EA
$52.4B
| $16.4M | 0.01% |
112,300
-29,100
| -21% | -$4.48M |
|
740
CALL
Diamondback Energy
FANG
$57.1B
| $16.4M | 0.01% |
100,200
+35,800
| +56% | +$6.31M |
|
741
CALL
Synchrony
SYF
$23.7B
| $16.4M | 0.01% |
252,300
+48,900
| +24% | +$2.99M |
|
742
PUT
Rigetti Computing
RGTI
$5.06B
| $16.4M | 0.01% |
1,074,200
+1,057,400
| +6,294% | +$3.94M |
|
743
PUT
LyondellBasell Industries
LYB
$20.1B
| $16.4M | 0.01% |
220,700
+149,500
| +210% | +$12.6M |
|
|
744
PUT
Electronic Arts
EA
$52.4B
| $16.4M | 0.01% |
111,900
+13,700
| +14% | +$2.11M |
|
745
PUT
KB Home
KBH
$3.46B
| $16.4M | 0.01% |
248,800
-71,700
| -22% | -$5.58M |
|
746
CALL
Fidelity National Information Services
FIS
$21B
| $16.3M | 0.01% |
202,400
+52,000
| +35% | +$4.48M |
|
747
PUT
Hilton Worldwide
HLT
$73.8B
| $16.3M | 0.01% |
66,100
-20,400
| -24% | -$4.99M |
|
748
CALL
American Tower
AMT
$77.4B
| $16.3M | 0.01% |
88,900
-34,700
| -28% | -$7.19M |
|
749
CALL
Sysco
SYY
$39.3B
| $16.3M | 0.01% |
213,000
-46,400
| -18% | -$3.55M |
|
750
CALL
Toyota
TM
$213B
| $16.2M | 0.01% |
83,300
+21,400
| +35% | +$3.76M |
|
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.