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 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.6M |
| 2 |
Shopify
SHOP
|
+$39.6M |
| 3 |
iShares China Large-Cap ETF
FXI
|
+$35.4M |
| 4 |
Verizon
VZ
|
+$34.1M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$34.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$49.5M |
| 2 |
GE Aerospace
GE
|
+$35.2M |
| 3 |
Carnival Corporation Ltd
CCL
|
+$30.5M |
| 4 |
Advanced Micro Devices
AMD
|
+$28.8M |
| 5 |
Micron Technology
MU
|
+$23.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 97.43% |
| 2 | Technology | 0.63% |
| 3 | Consumer Discretionary | 0.43% |
| 4 | Healthcare | 0.36% |
| 5 | Communication Services | 0.23% |
| 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
| $6.86B | 6.93% |
14,449,200
-15,013,400
| -51% | -$6.89B |
2015 Q1
27 quarters
|
|
2
CALL
Tesla
TSLA
$1.48T
| $4.3B | 4.34% |
12,208,500
-2,369,100
| -16% | -$795M |
2021 Q2
2 quarters
|
|
|
3
CALL
State Street SPDR S&P 500 ETF Trust
SPY
$815B
| $3.81B | 3.85% |
8,027,000
-4,867,400
| -38% | -$2.23B |
2015 Q1
27 quarters
|
|
|
4
PUT
Tesla
TSLA
$1.48T
| $3.79B | 3.82% |
10,747,200
-12,928,200
| -55% | -$4.34B |
2021 Q2
2 quarters
|
|
5
PUT
iShares S&P 100 ETF
OEF
$20.3B
| $2.95B | 2.98% |
19,976,500
-3,279,100
| -14% | -$695M |
2014 Q4
28 quarters
|
|
6
PUT
Invesco QQQ Trust
QQQ
$475B
| $2.81B | 2.84% |
7,073,900
-3,809,300
| -35% | -$1.47B |
2021 Q2
2 quarters
|
|
7
PUT
Amazon
AMZN
$2.7T
| $2.21B | 2.23% |
13,276,000
-946,000
| -7% | -$162M |
2015 Q1
27 quarters
|
|
|
8
CALL
Invesco QQQ Trust
QQQ
$475B
| $2.12B | 2.14% |
5,317,100
-1,444,200
| -21% | -$558M |
2021 Q2
2 quarters
|
|
9
CALL
Apple
AAPL
$5.08T
| $1.99B | 2.01% |
11,220,300
-3,364,800
| -23% | -$532M |
2015 Q1
27 quarters
|
|
|
10
PUT
Apple
AAPL
$5.08T
| $1.95B | 1.97% |
10,963,800
-1,761,600
| -14% | -$278M |
2015 Q1
27 quarters
|
|
|
11
CALL
iShares S&P 100 ETF
OEF
$20.3B
| $1.93B | 1.95% |
14,973,900
+2,188,600
| +17% | +$464M |
2014 Q4
28 quarters
|
|
|
12
CALL
Amazon
AMZN
$2.7T
| $1.8B | 1.81% |
10,770,000
-2,256,000
| -17% | -$386M |
2015 Q1
27 quarters
|
|
13
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.18B
| $1.5B | 1.51% |
40,390,000
+8,883,400
| +28% | +$384M |
2015 Q1
27 quarters
|
|
14
PUT
NVIDIA
NVDA
$5.12T
| $1.04B | 1.05% |
35,524,000
+23,332,000
| +191% | +$642M |
2021 Q2
2 quarters
|
|
15
CALL
Meta Platforms (Facebook)
META
$1.65T
| $941M | 0.95% |
2,797,100
+502,000
| +22% | +$167M |
2014 Q4
28 quarters
|
|
|
16
PUT
Meta Platforms (Facebook)
META
$1.65T
| $889M | 0.9% |
2,643,600
+215,700
| +9% | +$71.6M |
2014 Q4
28 quarters
|
|
|
17
CALL
NVIDIA
NVDA
$5.12T
| $818M | 0.83% |
27,811,000
+17,865,000
| +180% | +$492M |
2021 Q2
2 quarters
|
|
|
18
CALL
State Street Materials Select Sector SPDR ETF
XLB
$8.18B
| $802M | 0.81% |
20,038,400
-9,274,600
| -32% | -$401M |
2015 Q1
27 quarters
|
|
19
PUT
Alphabet (Google) Class A
GOOGL
$3.97T
| $770M | 0.78% |
5,320,000
-1,010,000
| -16% | -$145M |
2015 Q4
24 quarters
|
|
20
PUT
Microsoft
MSFT
$3.87T
| $765M | 0.77% |
2,274,000
-243,100
| -10% | -$78.8M |
2014 Q4
28 quarters
|
|
|
21
CALL
Alphabet (Google) Class A
GOOGL
$3.97T
| $692M | 0.7% |
4,780,000
-130,000
| -3% | -$18.7M |
2015 Q4
24 quarters
|
|
|
22
CALL
Microsoft
MSFT
$3.87T
| $649M | 0.66% |
1,928,800
-173,800
| -8% | -$56.3M |
2014 Q4
28 quarters
|
|
|
23
PUT
Advanced Micro Devices
AMD
$829B
| $636M | 0.64% |
4,416,300
-89,200
| -2% | -$12M |
2015 Q1
27 quarters
|
|
24
PUT
Netflix
NFLX
$279B
| $545M | 0.55% |
9,050,000
-503,000
| -5% | -$32.1M |
2014 Q4
28 quarters
|
|
25
CALL
Alibaba
BABA
$253B
| $501M | 0.51% |
4,216,400
+306,600
| +8% | +$44.7M |
2021 Q2
2 quarters
|
|
Similar funds
Simplex Trading's Q4 2021 Portfolio in Review
As of Q4 2021, Simplex Trading held 12,077 positions worth $99B, down 7.5% from $107B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q4 2021 filing shows 2,269 new, 3,785 increased, 4,257 reduced and 1,642 closed positions. Its largest new stake was iShares China Large-Cap ETF: 902,666 shares worth $33M. The largest sale was AMC Entertainment Holdings, an estimated $49.5M.
By sector, the portfolio is most concentrated in Miscellaneous at 97% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q4 2021 buy was iShares China Large-Cap ETF: 902,666 shares worth $33M.
- Simplex Trading added most to State Street Financial Select Sector SPDR ETF in Q4 2021, an estimated $42.6M increase.
- Simplex Trading's biggest Q4 2021 reduction was AMC Entertainment Holdings, cutting an estimated $49.5M.
- Simplex Trading fully exited Carnival Corporation Ltd in Q4 2021, selling an estimated $30.5M.
- Simplex Trading's ten largest holdings make up 33% of its $99B portfolio in Q4 2021.
- Simplex Trading opened 2,269 new positions and closed 1,642 in Q4 2021.
- Simplex Trading's portfolio value fell 7.5% quarter-over-quarter to $99B.
Based on Simplex Trading's 13F filing for Q4 2021, filed 4 Feb 2022.