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 |
GE Aerospace
GE
|
+$36M |
| 2 |
Advanced Micro Devices
AMD
|
+$19.4M |
| 3 |
iShares MSCI EAFE ETF
EFA
|
+$10.2M |
| 4 |
Micron Technology
MU
|
+$6.31M |
| 5 |
Alibaba
BABA
|
+$6.19M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$25.9M |
| 2 |
SPDR Gold Trust
GLD
|
+$15.3M |
| 3 |
Amazon
AMZN
|
+$9.53M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$9.03M |
| 5 |
State Street Technology Select Sector SPDR ETF
XLK
|
+$7.73M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.25% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1526
PUT
Evercore
EVR
$13.1B
| $3.48M | ﹤0.01% |
24,500
| – | – |
|
1527
CALL
Vertiv
VRT
$112B
| $3.47M | ﹤0.01% |
126,300
+14,100
| +13% | +$375K |
|
1528
CALL
Teucrium Soybean Fund
SOYB
$57.2M
| $3.46M | ﹤0.01% |
174,300
-3,200
| -2% | -$73.1K |
|
|
VTLE
1529
CALL
DELISTED
Vital Energy
VTLE
| $3.46M | ﹤0.01% |
36,200
-400
| -1% | -$24.5K |
|
|
CVAC
1530
CALL
DELISTED
CureVac
CVAC
| $3.46M | ﹤0.01% |
51,000
-4,500
| -8% | -$271K |
|
1531
CALL
Burlington
BURL
$22B
| $3.46M | ﹤0.01% |
10,600
+300
| +3% | +$95.9K |
|
1532
CALL
Cardinal Health
CAH
$53.4B
| $3.45M | ﹤0.01% |
59,600
+600
| +1% | +$32.5K |
|
1533
PUT
Alaska Air
ALK
$5.15B
| $3.45M | ﹤0.01% |
56,200
+5,000
| +10% | +$288K |
|
1534
Clean Energy Fuels
CLNE
$447M
| $3.45M | ﹤0.01% |
330,674
+1,296
| +0.4% | +$10.3K |
|
1535
PUT
Ubiquiti
UI
$31.8B
| $3.44M | ﹤0.01% |
11,000
| – | – |
|
1536
PUT
Air Products & Chemicals
APD
$66.3B
| $3.44M | ﹤0.01% |
11,900
+200
| +2% | +$55.3K |
|
1537
PUT
Chemours
CC
$2.59B
| $3.44M | ﹤0.01% |
96,900
+400
| +0.4% | +$12.9K |
|
|
LNW
1538
CALL
DELISTED
Light & Wonder
LNW
| $3.43M | ﹤0.01% |
44,700
-100
| -0.2% | -$7.05K |
|
1539
PUT
Travelers Companies
TRV
$80.8B
| $3.43M | ﹤0.01% |
22,600
+10,500
| +87% | +$1.63M |
|
|
BIG
1540
CALL
DELISTED
Big Lots, Inc.
BIG
| $3.43M | ﹤0.01% |
52,300
+400
| +0.8% | +$21.8K |
|
1541
CALL
Whirlpool
WHR
$2.42B
| $3.42M | ﹤0.01% |
15,600
+2,300
| +17% | +$504K |
|
1542
CALL
Progyny
PGNY
$2.44B
| $3.41M | ﹤0.01% |
56,500
| – | – |
|
1543
CALL
ZIM Integrated Shipping Services
ZIM
$3B
| $3.41M | ﹤0.01% |
80,400
+800
| +1% | +$37.4K |
|
|
JNPR
1544
CALL
DELISTED
Juniper Networks
JNPR
| $3.41M | ﹤0.01% |
124,900
| – | – |
|
1545
PUT
Zebra Technologies
ZBRA
$12.4B
| $3.4M | ﹤0.01% |
6,400
+100
| +2% | +$55.7K |
|
1546
CALL
Consolidated Edison
ED
$41.6B
| $3.4M | ﹤0.01% |
46,900
+300
| +0.6% | +$22.4K |
|
1547
PUT
Sony
SONY
$123B
| $3.4M | ﹤0.01% |
173,000
+7,500
| +5% | +$157K |
|
|
DEN
1548
CALL
DELISTED
Denbury Inc.
DEN
| $3.39M | ﹤0.01% |
43,400
-100
| -0.2% | -$6.9K |
|
1549
Apple
AAPL
$4.89T
| $3.39M | ﹤0.01% |
24,700
| – | – |
|
1550
PUT
AST SpaceMobile
ASTS
$16.8B
| $3.39M | ﹤0.01% |
261,600
+8,300
| +3% | +$93.1K |
|
Similar funds
Simplex Trading's Q3 2021 Portfolio in Review
As of Q3 2021, Simplex Trading held 10,062 positions worth $107B, up 3.4% from $104B the previous quarter. Its ten largest holdings account for 41% of the portfolio.
Trading was light in Q3 2021: portfolio turnover was 3.5%. Simplex Trading opened 86 new positions and exited 271, leaving the 10,062-position portfolio largely intact.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, up from 0.47% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q3 2021 buy was Olo Inc: 143,230 shares worth $4.91M.
- Simplex Trading added most to GE Aerospace in Q3 2021, an estimated $36M increase.
- Simplex Trading's biggest Q3 2021 reduction was NVIDIA, cutting an estimated $25.9M.
- Simplex Trading fully exited Amazon in Q3 2021, selling an estimated $9.53M.
- Simplex Trading's ten largest holdings make up 41% of its $107B portfolio in Q3 2021.
- Simplex Trading opened 86 new positions and closed 271 in Q3 2021.
- Simplex Trading's portfolio value rose 3.4% quarter-over-quarter to $107B.
Based on Simplex Trading's 13F filing for Q3 2021, filed 28 Oct 2021.