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 | |
|---|---|---|---|---|---|---|
51
CALL
Eli Lilly
LLY
$1.02T
| $306M | 0.19% |
338,400
-151,600
| -31% | -$121M |
|
52
CALL
Netflix
NFLX
$286B
| $296M | 0.18% |
4,386,000
-3,043,000
| -41% | -$190M |
|
53
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $294M | 0.18% |
3,936,100
-1,725,700
| -30% | -$130M |
|
54
PUT
Micron Technology
MU
$1.1T
| $290M | 0.18% |
2,206,700
-1,015,300
| -32% | -$128M |
|
55
CALL
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $279M | 0.17% |
4,671,500
-2,304,000
| -33% | -$422M |
|
|
56
PUT
Boeing
BA
$161B
| $277M | 0.17% |
1,577,900
+96,500
| +7% | +$17.2M |
|
57
CALL
Qualcomm
QCOM
$183B
| $276M | 0.17% |
1,386,700
+153,900
| +12% | +$29.1M |
|
58
CALL
Super Micro Computer
SMCI
$16.5B
| $267M | 0.17% |
3,260,000
-1,048,000
| -24% | -$89.6M |
|
59
PUT
JPMorgan Chase
JPM
$901B
| $266M | 0.16% |
1,314,400
-26,900
| -2% | -$5.26M |
|
60
CALL
ExxonMobil
XOM
$629B
| $265M | 0.16% |
2,360,800
-425,200
| -15% | -$49.5M |
|
61
PUT
Palo Alto Networks
PANW
$279B
| $262M | 0.16% |
1,544,200
-193,200
| -11% | -$28.9M |
|
62
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $252M | 0.16% |
620,000
-24,500
| -4% | -$10M |
|
|
63
PUT
Qualcomm
QCOM
$183B
| $246M | 0.15% |
1,234,900
+337,200
| +38% | +$63.7M |
|
|
64
PUT
Pinduoduo
PDD
$121B
| $229M | 0.14% |
1,724,600
+231,600
| +16% | +$31.4M |
|
65
PUT
Alibaba
BABA
$283B
| $229M | 0.14% |
3,174,700
+338,200
| +12% | +$25.9M |
|
66
PUT
Vanguard S&P 500 ETF
VOO
$981B
| $228M | 0.14% |
566,900
+54,800
| +11% | +$26.4M |
|
|
67
CALL
Palo Alto Networks
PANW
$279B
| $223M | 0.14% |
1,317,600
-527,400
| -29% | -$78.9M |
|
68
PUT
Arm
ARM
$309B
| $219M | 0.14% |
1,341,100
+167,600
| +14% | +$20.8M |
|
69
PUT
Coinbase
COIN
$46.3B
| $217M | 0.13% |
975,700
-460,000
| -32% | -$106M |
|
70
PUT
Adobe
ADBE
$90.3B
| $217M | 0.13% |
390,100
-123,000
| -24% | -$59.6M |
|
71
PUT
Goldman Sachs
GS
$320B
| $215M | 0.13% |
506,200
-98,200
| -16% | -$43.1M |
|
72
CALL
Chipotle Mexican Grill
CMG
$42.5B
| $215M | 0.13% |
3,430,400
+630,400
| +23% | +$39.2M |
|
|
73
CALL
PayPal
PYPL
$49.3B
| $214M | 0.13% |
4,337,100
+365,800
| +9% | +$23.3M |
|
74
CALL
Dell
DELL
$261B
| $210M | 0.13% |
1,735,100
+912,100
| +111% | +$122M |
|
|
75
PUT
Chipotle Mexican Grill
CMG
$42.5B
| $202M | 0.12% |
3,219,000
+329,000
| +11% | +$20.4M |
|
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.