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 | |
|---|---|---|---|---|---|---|
|
51
PUT
Boeing
BA
$161B
| $369M | 0.21% |
2,085,000
+491,800
| +31% | +$77.2M |
|
52
PUT
Walmart Inc
WMT
$878B
| $346M | 0.19% |
4,067,800
+986,700
| +32% | +$85.6M |
|
|
53
CALL
Walmart Inc
WMT
$878B
| $337M | 0.19% |
3,735,400
-513,400
| -12% | -$44.6M |
|
54
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $327M | 0.18% |
4,134,600
+1,425,400
| +53% | +$118M |
|
55
CALL
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $325M | 0.18% |
4,517,000
-346,000
| -7% | -$70.6M |
|
56
CALL
Eli Lilly
LLY
$1.02T
| $325M | 0.18% |
420,400
+148,000
| +54% | +$123M |
|
57
CALL
JPMorgan Chase
JPM
$901B
| $311M | 0.17% |
1,298,200
-66,300
| -5% | -$15.4M |
|
58
PUT
Goldman Sachs
GS
$320B
| $310M | 0.17% |
540,600
+37,100
| +7% | +$20.7M |
|
59
CALL
Coinbase
COIN
$46.3B
| $303M | 0.17% |
1,221,500
-68,600
| -5% | -$17.4M |
|
60
PUT
Super Micro Computer
SMCI
$16.5B
| $291M | 0.16% |
9,883,100
+2,574,100
| +35% | +$93.6M |
|
|
61
PUT
JPMorgan Chase
JPM
$901B
| $289M | 0.16% |
1,357,800
+53,700
| +4% | +$12.5M |
|
|
KFYP
62
CALL
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $288M | 0.16% |
9,867,900
+2,273,500
| +30% | +$66.4M |
|
|
63
PUT
Coinbase
COIN
$46.3B
| $286M | 0.16% |
1,151,600
+208,600
| +22% | +$53M |
|
|
64
PUT
Eli Lilly
LLY
$1.02T
| $285M | 0.16% |
399,000
+69,300
| +21% | +$57.4M |
|
65
PUT
Salesforce
CRM
$139B
| $284M | 0.16% |
850,900
+122,100
| +17% | +$39M |
|
66
PUT
Palo Alto Networks
PANW
$279B
| $276M | 0.15% |
1,515,000
-73,200
| -5% | -$13.8M |
|
|
67
CALL
Salesforce
CRM
$139B
| $269M | 0.15% |
804,700
+221,000
| +38% | +$70.5M |
|
68
PUT
Alibaba
BABA
$283B
| $267M | 0.15% |
3,154,600
-1,123,800
| -26% | -$106M |
|
69
CALL
UnitedHealth
UNH
$396B
| $259M | 0.15% |
512,200
+225,500
| +79% | +$128M |
|
70
PUT
CrowdStrike
CRWD
$195B
| $251M | 0.14% |
2,940,000
-969,200
| -25% | -$80.6M |
|
71
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $251M | 0.14% |
590,500
-703,100
| -54% | -$304M |
|
72
CALL
Citigroup
C
$216B
| $248M | 0.14% |
3,529,400
-2,430,900
| -41% | -$164M |
|
73
CALL
IBM
IBM
$198B
| $248M | 0.14% |
1,129,400
+353,000
| +45% | +$78.6M |
|
74
PUT
Oracle
ORCL
$366B
| $240M | 0.13% |
1,439,500
-153,500
| -10% | -$27.3M |
|
75
CALL
PayPal
PYPL
$49.3B
| $230M | 0.13% |
3,263,200
-67,100
| -2% | -$5.64M |
|
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.