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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.34% |
| 2 | Technology | 0.38% |
| 3 | Healthcare | 0.28% |
| 4 | Consumer Discretionary | 0.25% |
| 5 | Industrials | 0.17% |
| 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
| $30.6B | 17.68% |
59,050,900
+8,275,200
| +16% | +$4.12B |
2015 Q1
36 quarters
|
|
|
2
CALL
State Street SPDR S&P 500 ETF Trust
SPY
$815B
| $10.1B | 5.84% |
19,820,600
+1,763,400
| +10% | +$878M |
2015 Q1
36 quarters
|
|
3
PUT
Invesco QQQ Trust
QQQ
$475B
| $7.82B | 4.52% |
17,607,100
+1,370,800
| +8% | +$588M |
2021 Q2
11 quarters
|
|
|
4
CALL
NVIDIA
NVDA
$5.12T
| $6.78B | 3.92% |
75,062,000
-926,000
| -1% | -$67.1M |
2021 Q2
11 quarters
|
|
|
5
PUT
NVIDIA
NVDA
$5.12T
| $5.76B | 3.33% |
64,818,000
+16,896,000
| +35% | +$1.22B |
2021 Q2
11 quarters
|
|
6
PUT
iShares S&P 100 ETF
OEF
$20.3B
| $5.37B | 3.1% |
35,871,600
-8,986,300
| -20% | -$2.12B |
2014 Q4
37 quarters
|
|
|
7
CALL
iShares S&P 100 ETF
OEF
$20.3B
| $4.55B | 2.63% |
33,053,000
-3,532,300
| -10% | -$834M |
2014 Q4
37 quarters
|
|
|
8
CALL
Invesco QQQ Trust
QQQ
$475B
| $4.24B | 2.45% |
9,559,000
+1,097,400
| +13% | +$471M |
2021 Q2
11 quarters
|
|
9
PUT
Tesla
TSLA
$1.48T
| $3.35B | 1.94% |
19,111,900
+5,252,000
| +38% | +$1.03B |
2021 Q2
11 quarters
|
|
10
CALL
Apple
AAPL
$5.08T
| $2.63B | 1.52% |
16,223,700
+3,522,000
| +28% | +$640M |
2015 Q1
36 quarters
|
|
|
11
CALL
Tesla
TSLA
$1.48T
| $2.39B | 1.38% |
13,586,000
+2,332,300
| +21% | +$456M |
2021 Q2
11 quarters
|
|
|
12
CALL
Meta Platforms (Facebook)
META
$1.65T
| $1.7B | 0.98% |
3,605,900
-1,034,700
| -22% | -$462M |
2014 Q4
37 quarters
|
|
13
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.18B
| $1.6B | 0.92% |
43,593,200
+84,200
| +0.2% | +$3.62M |
2015 Q1
36 quarters
|
|
14
CALL
Amazon
AMZN
$2.7T
| $1.54B | 0.89% |
8,523,000
-3,625,000
| -30% | -$605M |
2015 Q1
36 quarters
|
|
|
15
PUT
Apple
AAPL
$5.08T
| $1.43B | 0.83% |
8,328,100
-1,544,700
| -16% | -$281M |
2015 Q1
36 quarters
|
|
|
16
CALL
Alphabet (Google) Class A
GOOGL
$3.97T
| $1.35B | 0.78% |
8,930,800
-1,189,700
| -12% | -$170M |
2015 Q4
33 quarters
|
|
|
17
PUT
Meta Platforms (Facebook)
META
$1.65T
| $1.33B | 0.77% |
2,876,000
-137,300
| -5% | -$61.2M |
2014 Q4
37 quarters
|
|
18
CALL
Microsoft
MSFT
$3.87T
| $1.31B | 0.76% |
3,116,000
-900,100
| -22% | -$364M |
2014 Q4
37 quarters
|
|
|
19
PUT
Microsoft
MSFT
$3.87T
| $1.28B | 0.74% |
3,042,200
-1,065,800
| -26% | -$431M |
2014 Q4
37 quarters
|
|
20
CALL
SPDR Gold Trust
GLD
$136B
| $1.15B | 0.66% |
5,577,000
-3,145,200
| -36% | -$604M |
2015 Q1
36 quarters
|
|
|
21
CALL
State Street Materials Select Sector SPDR ETF
XLB
$8.18B
| $1.09B | 0.63% |
28,461,400
+2,643,800
| +10% | +$114M |
2015 Q1
36 quarters
|
|
|
22
PUT
Alphabet (Google) Class A
GOOGL
$3.97T
| $1.05B | 0.61% |
6,929,600
+19,800
| +0.3% | +$2.83M |
2015 Q4
33 quarters
|
|
|
23
PUT
Amazon
AMZN
$2.7T
| $923M | 0.53% |
5,167,100
-3,007,800
| -37% | -$502M |
2015 Q1
36 quarters
|
|
|
24
PUT
SPDR Gold Trust
GLD
$136B
| $897M | 0.52% |
4,361,300
+163,900
| +4% | +$31.5M |
2015 Q1
36 quarters
|
|
25
PUT
Booking.com
BKNG
$121B
| $839M | 0.48% |
5,785,000
-1,752,500
| -23% | -$250M |
2021 Q2
11 quarters
|
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,673 increased, 3,484 reduced and 1,504 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,504 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.