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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 97.75% |
| 2 | Technology | 0.51% |
| 3 | Financials | 0.35% |
| 4 | Consumer Discretionary | 0.3% |
| 5 | Healthcare | 0.26% |
| 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
$812B
| $9.6B | 10.83% |
26,811,700
+5,608,900
| +26% | +$2.23B |
2015 Q1
30 quarters
|
|
|
2
CALL
State Street SPDR S&P 500 ETF Trust
SPY
$812B
| $5.66B | 6.39% |
15,833,100
-3,859,700
| -20% | -$1.53B |
2015 Q1
30 quarters
|
|
3
PUT
iShares S&P 100 ETF
OEF
$20.3B
| $3.42B | 3.87% |
30,335,900
+1,320,400
| +5% | +$240M |
2014 Q4
31 quarters
|
|
4
PUT
Invesco QQQ Trust
QQQ
$475B
| $3.18B | 3.6% |
11,904,600
+1,954,800
| +20% | +$590M |
2021 Q2
5 quarters
|
|
5
PUT
Tesla
TSLA
$1.48T
| $2.68B | 3.03% |
10,117,600
-314,300
| -3% | -$87.8M |
2021 Q2
5 quarters
|
|
|
6
CALL
Invesco QQQ Trust
QQQ
$475B
| $2.14B | 2.42% |
8,020,800
-2,297,000
| -22% | -$693M |
2021 Q2
5 quarters
|
|
|
7
CALL
Tesla
TSLA
$1.48T
| $1.97B | 2.23% |
7,434,300
-17,216,100
| -70% | -$4.81B |
2021 Q2
5 quarters
|
|
|
8
CALL
Apple
AAPL
$5.07T
| $1.73B | 1.95% |
12,594,400
+4,628,500
| +58% | +$726M |
2015 Q1
30 quarters
|
|
|
9
CALL
iShares S&P 100 ETF
OEF
$20.3B
| $1.69B | 1.91% |
19,655,700
+1,233,700
| +7% | +$224M |
2014 Q4
31 quarters
|
|
|
10
PUT
Apple
AAPL
$5.07T
| $1.62B | 1.83% |
11,804,800
+798,100
| +7% | +$125M |
2015 Q1
30 quarters
|
|
11
CALL
Amazon
AMZN
$2.68T
| $1.32B | 1.49% |
11,696,700
-2,022,600
| -15% | -$256M |
2015 Q1
30 quarters
|
|
12
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.14B
| $1.24B | 1.4% |
39,540,200
-561,000
| -1% | -$21.1M |
2015 Q1
30 quarters
|
|
|
13
PUT
Amazon
AMZN
$2.68T
| $1.01B | 1.15% |
8,972,800
-40,400
| -0.4% | -$5.11M |
2015 Q1
30 quarters
|
|
14
CALL
Alphabet (Google) Class A
GOOGL
$3.95T
| $814M | 0.92% |
8,500,000
-9,124,000
| -52% | -$1.01B |
2015 Q4
27 quarters
|
|
|
15
CALL
Microsoft
MSFT
$3.87T
| $745M | 0.84% |
3,198,300
-8,600
| -0.3% | -$2.27M |
2014 Q4
31 quarters
|
|
|
16
CALL
Meta Platforms (Facebook)
META
$1.63T
| $743M | 0.84% |
5,477,800
+339,100
| +7% | +$55M |
2014 Q4
31 quarters
|
|
|
17
CALL
State Street Materials Select Sector SPDR ETF
XLB
$8.14B
| $737M | 0.83% |
21,744,600
-5,298,000
| -20% | -$199M |
2015 Q1
30 quarters
|
|
|
18
PUT
Microsoft
MSFT
$3.87T
| $732M | 0.83% |
3,144,400
+413,400
| +15% | +$109M |
2014 Q4
31 quarters
|
|
19
CALL
SPDR Gold Trust
GLD
$136B
| $649M | 0.73% |
4,197,300
-294,200
| -7% | -$47.3M |
2015 Q1
30 quarters
|
|
|
20
PUT
Alphabet (Google) Class A
GOOGL
$3.95T
| $625M | 0.71% |
6,520,900
-5,321,100
| -45% | -$590M |
2015 Q4
27 quarters
|
|
|
21
PUT
SPDR Gold Trust
GLD
$136B
| $612M | 0.69% |
3,957,300
-110,700
| -3% | -$17.8M |
2015 Q1
30 quarters
|
|
22
PUT
Netflix
NFLX
$279B
| $596M | 0.67% |
25,322,000
+10,596,000
| +72% | +$235M |
2014 Q4
31 quarters
|
|
|
23
PUT
NVIDIA
NVDA
$5.11T
| $544M | 0.61% |
44,780,000
+10,709,000
| +31% | +$169M |
2021 Q2
5 quarters
|
|
|
24
PUT
Meta Platforms (Facebook)
META
$1.63T
| $482M | 0.54% |
3,552,100
+524,500
| +17% | +$85M |
2014 Q4
31 quarters
|
|
|
25
CALL
NVIDIA
NVDA
$5.11T
| $473M | 0.53% |
38,970,000
+2,394,000
| +7% | +$37.8M |
2021 Q2
5 quarters
|
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,566 new, 4,275 increased, 3,850 reduced and 1,574 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 97% a quarter earlier, followed by Technology and Financials.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,566 new positions and closed 1,574 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.