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 | Miscellaneous | 98.27% |
| 2 | Technology | 0.53% |
| 3 | Consumer Discretionary | 0.29% |
| 4 | Healthcare | 0.21% |
| 5 | Financials | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
1
PUT
State Street SPDR S&P 500 ETF Trust
SPY
$815B
| $28.5B | 17.59% |
52,594,500
-6,456,400
| -11% | -$3.38B |
2015 Q1
37 quarters
|
|
|
2
CALL
State Street SPDR S&P 500 ETF Trust
SPY
$815B
| $10.4B | 6.43% |
19,401,400
-419,200
| -2% | -$219M |
2015 Q1
37 quarters
|
|
3
PUT
Invesco QQQ Trust
QQQ
$478B
| $8.98B | 5.55% |
18,739,700
+1,132,600
| +6% | +$509M |
2021 Q2
12 quarters
|
|
|
4
CALL
NVIDIA
NVDA
$5.15T
| $6.26B | 3.87% |
51,092,500
-23,969,500
| -32% | -$2.42B |
2021 Q2
12 quarters
|
|
5
PUT
iShares S&P 100 ETF
OEF
$20.4B
| $5.57B | 3.44% |
37,203,300
+1,331,700
| +4% | +$333M |
2014 Q4
38 quarters
|
|
|
6
PUT
NVIDIA
NVDA
$5.15T
| $5.34B | 3.3% |
43,206,800
-21,611,200
| -33% | -$2.18B |
2021 Q2
12 quarters
|
|
|
7
CALL
Invesco QQQ Trust
QQQ
$478B
| $4.7B | 2.9% |
9,813,900
+254,900
| +3% | +$115M |
2021 Q2
12 quarters
|
|
|
8
CALL
iShares S&P 100 ETF
OEF
$20.4B
| $3.98B | 2.46% |
30,937,600
-2,115,400
| -6% | -$529M |
2014 Q4
38 quarters
|
|
9
PUT
Tesla
TSLA
$1.5T
| $3.73B | 2.3% |
18,931,500
-180,400
| -0.9% | -$31.5M |
2021 Q2
12 quarters
|
|
10
CALL
Apple
AAPL
$5.05T
| $3.42B | 2.11% |
16,254,400
+30,700
| +0.2% | +$5.73M |
2015 Q1
37 quarters
|
|
|
11
CALL
Tesla
TSLA
$1.5T
| $2.21B | 1.37% |
11,188,500
-2,397,500
| -18% | -$419M |
2021 Q2
12 quarters
|
|
|
12
PUT
Apple
AAPL
$5.05T
| $1.87B | 1.15% |
9,195,900
+867,800
| +10% | +$162M |
2015 Q1
37 quarters
|
|
13
CALL
Meta Platforms (Facebook)
META
$1.65T
| $1.45B | 0.9% |
2,885,400
-720,500
| -20% | -$350M |
2014 Q4
38 quarters
|
|
14
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.14B
| $1.3B | 0.8% |
37,963,400
-5,629,800
| -13% | -$254M |
2015 Q1
37 quarters
|
|
15
CALL
Amazon
AMZN
$2.72T
| $1.28B | 0.79% |
6,637,000
-1,886,000
| -22% | -$346M |
2015 Q1
37 quarters
|
|
16
CALL
Microsoft
MSFT
$3.9T
| $1.27B | 0.78% |
2,833,900
-282,100
| -9% | -$119M |
2014 Q4
38 quarters
|
|
17
CALL
SPDR Gold Trust
GLD
$137B
| $1.22B | 0.76% |
5,688,000
+111,000
| +2% | +$24M |
2015 Q1
37 quarters
|
|
|
18
PUT
Microsoft
MSFT
$3.9T
| $1.21B | 0.74% |
2,727,600
-314,600
| -10% | -$133M |
2014 Q4
38 quarters
|
|
|
19
PUT
Amazon
AMZN
$2.72T
| $1.17B | 0.72% |
6,065,900
+898,800
| +17% | +$165M |
2015 Q1
37 quarters
|
|
20
CALL
Alphabet (Google) Class A
GOOGL
$4T
| $1.17B | 0.72% |
6,571,000
-2,359,800
| -26% | -$398M |
2015 Q4
34 quarters
|
|
|
21
CALL
State Street Materials Select Sector SPDR ETF
XLB
$8.14B
| $1000M | 0.62% |
28,440,400
-21,000
| -0.1% | -$949K |
2015 Q1
37 quarters
|
|
|
22
PUT
Meta Platforms (Facebook)
META
$1.65T
| $967M | 0.6% |
2,049,800
-826,200
| -29% | -$402M |
2014 Q4
38 quarters
|
|
|
23
PUT
SPDR Gold Trust
GLD
$137B
| $954M | 0.59% |
4,435,000
+73,700
| +2% | +$15.9M |
2015 Q1
37 quarters
|
|
|
24
PUT
Alphabet (Google) Class A
GOOGL
$4T
| $900M | 0.56% |
4,974,300
-1,955,300
| -28% | -$330M |
2015 Q4
34 quarters
|
|
|
25
CALL
Broadcom
AVGO
$1.55T
| $865M | 0.53% |
5,385,000
-557,000
| -9% | -$78.1M |
2021 Q2
12 quarters
|
|
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's Q2 2024 filing shows 1,357 new, 3,195 increased, 4,061 reduced and 1,430 closed positions. Its largest new stake was Citigroup: 1,213,247 shares worth $77M. The largest sale was State Street Energy Select Sector SPDR ETF, an estimated $94.5M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 1,357 new positions and closed 1,430 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.