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 | |
|---|---|---|---|---|---|---|
1551
CALL
Harley-Davidson
HOG
$2.68B
| $3.39M | ﹤0.01% |
72,100
-900
| -1% | -$36.3K |
|
1552
PUT
M&T Bank
MTB
$36.2B
| $3.39M | ﹤0.01% |
23,000
+500
| +2% | +$69.3K |
|
1553
PUT
AngloGold Ashanti
AU
$40.3B
| $3.38M | ﹤0.01% |
181,300
-2,900
| -2% | -$50.2K |
|
1554
CALL
Baker Hughes
BKR
$56.8B
| $3.38M | ﹤0.01% |
143,600
-300
| -0.2% | -$6.68K |
|
1555
CALL
Ferrari
RACE
$63.3B
| $3.38M | ﹤0.01% |
16,600
+1,500
| +10% | +$322K |
|
|
MCFE
1556
PUT
DELISTED
McAfee Corp. Class A Common Stock
MCFE
| $3.37M | ﹤0.01% |
118,900
| – | – |
|
1557
PUT
Hewlett Packard
HPE
$63.2B
| $3.37M | ﹤0.01% |
229,300
| – | – |
|
1558
Qorvo
QRVO
$7.63B
| $3.37M | ﹤0.01% |
17,438
-1,678
| -9% | -$312K |
|
|
BLDP
1559
CALL
Ballard Power Systems
BLDP
$874M
| $3.36M | ﹤0.01% |
184,600
+200
| +0.1% | +$3.17K |
|
1560
CALL
10x Genomics
TXG
$5.87B
| $3.36M | ﹤0.01% |
17,700
| – | – |
|
1561
PUT
Sprouts Farmers Market
SFM
$7.04B
| $3.36M | ﹤0.01% |
132,200
+19,000
| +17% | +$463K |
|
1562
Berkshire Hathaway Class B
BRK.B
$1.07T
| $3.35M | ﹤0.01% |
11,976
+3,544
| +42% | +$995K |
|
1563
Blackrock
BLK
$164B
| $3.35M | ﹤0.01% |
3,809
+39
| +1% | +$34.9K |
|
1564
CALL
JB Hunt Transport Services
JBHT
$27.1B
| $3.34M | ﹤0.01% |
20,000
-500
| -2% | -$85.3K |
|
|
NEX
1565
DELISTED
NexTier Oilfield Solutions Inc.
NEX
| $3.34M | ﹤0.01% |
653,260
| – | – |
|
|
CS
1566
PUT
DELISTED
Credit Suisse Group
CS
| $3.33M | ﹤0.01% |
315,700
-1,500
| -0.5% | -$15.3K |
|
1567
CALL
Root
ROOT
$917M
| $3.33M | ﹤0.01% |
18,594
-850
| -4% | -$105K |
|
1568
CALL
Celsius Holdings
CELH
$6.93B
| $3.32M | ﹤0.01% |
137,100
-900
| -0.7% | -$23.1K |
|
|
JWN
1569
DELISTED
Nordstrom
JWN
| $3.31M | ﹤0.01% |
90,845
-6,728
| -7% | -$215K |
|
1570
Edwards Lifesciences
EW
$47.6B
| $3.31M | ﹤0.01% |
31,592
+15,066
| +91% | +$1.72M |
|
1571
iShares Russell 1000 Growth ETF
IWF
$122B
| $3.31M | ﹤0.01% |
48,632
+3,124
| +7% | +$221K |
|
1572
PUT
Public Storage
PSA
$60.2B
| $3.3M | ﹤0.01% |
11,000
+100
| +0.9% | +$31.4K |
|
1573
CALL
Invesco DB Commodity Index Tracking Fund
DBC
$1.73B
| $3.3M | ﹤0.01% |
170,800
+3,200
| +2% | +$61.4K |
|
1574
PUT
Unilever
UL
$131B
| $3.3M | ﹤0.01% |
49,867
+89
| +0.2% | +$5.67K |
|
1575
PUT
Digital Realty Trust
DLR
$73.7B
| $3.3M | ﹤0.01% |
22,000
+100
| +0.5% | +$15.7K |
|
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.