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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
26
PUT
Broadcom
AVGO
$1.84T
| $730M | 0.45% |
4,544,000
-98,000
| -2% | -$13.7M |
|
27
PUT
Strategy Inc
MSTR
$37B
| $706M | 0.44% |
5,128,000
+1,917,000
| +60% | +$276M |
|
28
CALL
Alibaba
BABA
$283B
| $684M | 0.42% |
9,493,100
+517,400
| +6% | +$39.7M |
|
29
PUT
Advanced Micro Devices
AMD
$888B
| $676M | 0.42% |
4,170,000
-283,700
| -6% | -$45.6M |
|
30
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $608M | 0.38% |
8,119,100
-1,055,400
| -12% | -$36.2M |
|
|
31
CALL
Advanced Micro Devices
AMD
$888B
| $593M | 0.37% |
4,230,500
+321,800
| +8% | +$51.8M |
|
|
32
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $583M | 0.36% |
5,353,700
+155,000
| +3% | +$5.31M |
|
33
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $483M | 0.3% |
7,666,900
-3,870,800
| -34% | -$709M |
|
|
34
CALL
Strategy Inc
MSTR
$37B
| $457M | 0.28% |
3,316,000
-937,000
| -22% | -$135M |
|
35
PUT
Netflix
NFLX
$286B
| $443M | 0.27% |
6,563,000
-3,261,000
| -33% | -$204M |
|
36
PUT
TSMC
TSM
$2.2T
| $443M | 0.27% |
2,548,200
-215,900
| -8% | -$32.7M |
|
37
PUT
Costco
COST
$412B
| $433M | 0.27% |
553,800
-188,500
| -25% | -$147M |
|
38
PUT
Booking.com
BKNG
$139B
| $427M | 0.26% |
2,695,000
-3,090,000
| -53% | -$458M |
|
39
CALL
Micron Technology
MU
$1.1T
| $408M | 0.25% |
3,100,400
-1,083,200
| -26% | -$137M |
|
40
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $392M | 0.24% |
1,003,400
+46,300
| +5% | +$18M |
|
|
41
CALL
TSMC
TSM
$2.2T
| $377M | 0.23% |
2,170,800
-1,910,700
| -47% | -$290M |
|
42
PUT
Eli Lilly
LLY
$1.02T
| $372M | 0.23% |
411,300
-13,700
| -3% | -$11M |
|
43
CALL
iShares Silver Trust
SLV
$28.4B
| $372M | 0.23% |
13,989,000
+6,706,400
| +92% | +$176M |
|
44
PUT
Super Micro Computer
SMCI
$16.5B
| $359M | 0.22% |
4,382,000
-2,333,000
| -35% | -$199M |
|
|
45
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $342M | 0.21% |
873,800
+233,400
| +36% | +$90.6M |
|
|
46
CALL
Citigroup
C
$216B
| $337M | 0.21% |
5,303,400
-70,000
| -1% | -$4.32M |
|
47
CALL
JPMorgan Chase
JPM
$918B
| $336M | 0.21% |
1,659,300
-216,500
| -12% | -$42.3M |
|
|
48
CALL
Boeing
BA
$161B
| $325M | 0.2% |
1,783,600
-383,300
| -18% | -$68.3M |
|
|
49
CALL
Costco
COST
$412B
| $321M | 0.2% |
377,800
-243,900
| -39% | -$190M |
|
50
CALL
Walt Disney
DIS
$167B
| $310M | 0.19% |
3,117,500
+280,100
| +10% | +$30.2M |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.