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 | |
|---|---|---|---|---|---|---|
851
Visa
V
$669B
| $8.06M | 0.01% |
34,291
+5,276
| +18% | +$1.24M |
|
852
CALL
Ally Financial
ALLY
$13.4B
| $8.05M | 0.01% |
159,900
-900
| -0.6% | -$46.6K |
|
853
PUT
Appian
APPN
$1.61B
| $8.05M | 0.01% |
59,200
+200
| +0.3% | +$22.2K |
|
854
PUT
Duke Energy
DUK
$101B
| $8.02M | 0.01% |
80,600
-400
| -0.5% | -$41.4K |
|
|
FL
855
PUT
DELISTED
Foot Locker
FL
| $7.98M | 0.01% |
127,800
-500
| -0.4% | -$27.8K |
|
856
PUT
Progressive
PGR
$120B
| $7.97M | 0.01% |
80,600
| – | – |
|
|
WBA
857
DELISTED
Walgreens Boots Alliance
WBA
| $7.95M | 0.01% |
163,260
+45,920
| +39% | +$2.21M |
|
858
CALL
GrowGeneration
GRWG
$83.5M
| $7.93M | 0.01% |
159,800
+22,500
| +16% | +$795K |
|
859
PUT
BioMarin Pharmaceuticals
BMRN
$11.4B
| $7.93M | 0.01% |
94,500
| – | – |
|
|
ABB
860
CALL
DELISTED
ABB Ltd
ABB
| $7.92M | 0.01% |
233,200
| – | – |
|
861
CALL
T. Rowe Price
TROW
$24.6B
| $7.9M | 0.01% |
39,500
-100
| -0.3% | -$21.1K |
|
862
PUT
Trip.com Group
TCOM
$27.1B
| $7.88M | 0.01% |
223,000
| – | – |
|
863
PUT
Northrop Grumman
NOC
$75.8B
| $7.87M | 0.01% |
21,400
-200
| -0.9% | -$72.3K |
|
864
CALL
Southern Company
SO
$109B
| $7.86M | 0.01% |
127,900
+200
| +0.2% | +$12.9K |
|
865
CALL
Boston Beer
SAM
$1.82B
| $7.83M | 0.01% |
8,100
+1,800
| +29% | +$1.22M |
|
866
CALL
Bread Financial
BFH
$4.19B
| $7.81M | 0.01% |
91,344
+33,455
| +58% | +$2.58M |
|
867
Simon Property Group
SPG
$73B
| $7.8M | 0.01% |
59,340
-1,014
| -2% | -$132K |
|
|
TIGR
868
PUT
UP Fintech Holding
TIGR
$870M
| $7.8M | 0.01% |
298,200
+17,500
| +6% | +$275K |
|
869
PUT
Diageo
DEO
$45.7B
| $7.79M | 0.01% |
40,600
+3,000
| +8% | +$581K |
|
870
CALL
StoneCo
STNE
$2.67B
| $7.79M | 0.01% |
113,900
-400
| -0.3% | -$20.8K |
|
871
Altria Group
MO
$120B
| $7.76M | 0.01% |
162,316
+3,119
| +2% | +$151K |
|
872
CALL
Apollo Global Management
APO
$68.6B
| $7.76M | 0.01% |
123,200
-35,200
| -22% | -$2.12M |
|
873
PUT
Kraft Heinz
KHC
$30.1B
| $7.76M | 0.01% |
191,700
-700
| -0.4% | -$26.4K |
|
|
ZNGA
874
CALL
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $7.76M | 0.01% |
720,400
+2,000
| +0.3% | +$18.2K |
|
875
PUT
Ollie's Bargain Outlet
OLLI
$3.94B
| $7.75M | 0.01% |
90,800
+200
| +0.2% | +$16.2K |
|
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.