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 | |
|---|---|---|---|---|---|---|
2776
Targa Resources
TRGP
$60.4B
| $1.24M | ﹤0.01% |
27,600
+2,483
| +10% | +$109K |
|
2777
CALL
Invesco
IVZ
$13.3B
| $1.23M | ﹤0.01% |
45,800
| – | – |
|
|
WW
2778
DELISTED
WW International
WW
| $1.23M | ﹤0.01% |
34,294
+7,551
| +28% | +$197K |
|
2779
PUT
Gogo Inc
GOGO
$515M
| $1.23M | ﹤0.01% |
108,100
| – | – |
|
|
RFP
2780
CALL
DELISTED
Resolute Forest Products Inc.
RFP
| $1.23M | ﹤0.01% |
102,100
-100
| -0.1% | -$1.17K |
|
|
AGEN
2781
CALL
Agenus
AGEN
$249M
| $1.23M | ﹤0.01% |
11,291
+11
| +0.1% | +$1.24K |
|
2782
iShares MSCI China A ETF
CNYA
$221M
| $1.23M | ﹤0.01% |
28,016
+900
| +3% | +$38.5K |
|
2783
CALL
NOV
NOV
$7.45B
| $1.23M | ﹤0.01% |
78,700
+4,300
| +6% | +$58K |
|
2784
PUT
Alto Ingredients
ALTO
$360M
| $1.23M | ﹤0.01% |
203,900
| – | – |
|
2785
CALL
Tenet Healthcare
THC
$20.1B
| $1.23M | ﹤0.01% |
18,100
-500
| -3% | -$35.5K |
|
2786
Thor Industries
THO
$3.99B
| $1.23M | ﹤0.01% |
10,577
+2,285
| +28% | +$261K |
|
2787
Viatris
VTRS
$20.1B
| $1.23M | ﹤0.01% |
83,335
-21,049
| -20% | -$299K |
|
|
GBT
2788
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $1.23M | ﹤0.01% |
32,897
+2,200
| +7% | +$64.7K |
|
2789
PUT
Artisan Partners
APAM
$2.79B
| $1.23M | ﹤0.01% |
23,900
| – | – |
|
|
KYNB
2790
PUT
Kyntra Bio
KYNB
$28.5M
| $1.23M | ﹤0.01% |
1,852
+16
| +0.9% | +$5.67K |
|
2791
CALL
WEC Energy
WEC
$37.7B
| $1.23M | ﹤0.01% |
13,600
-200
| -1% | -$18.8K |
|
|
GES
2792
PUT
DELISTED
Guess Inc
GES
| $1.23M | ﹤0.01% |
46,400
| – | – |
|
2793
CALL
PetMed Express
PETS
$42.5M
| $1.22M | ﹤0.01% |
36,000
-3,000
| -8% | -$86.4K |
|
2794
CALL
AMN Healthcare
AMN
$1.28B
| $1.22M | ﹤0.01% |
12,500
-200
| -2% | -$21.2K |
|
2795
CALL
ADT
ADT
$5.16B
| $1.22M | ﹤0.01% |
112,200
-100
| -0.1% | -$921 |
|
2796
PUT
CNX Resources
CNX
$4.85B
| $1.22M | ﹤0.01% |
88,400
| – | – |
|
|
CLVR
2797
CALL
DELISTED
Clever Leaves Holdings Inc. Common Shares
CLVR
| $1.22M | ﹤0.01% |
3,983
| – | – |
|
2798
PUT
Innovative Industrial Properties
IIPR
$1.78B
| $1.22M | ﹤0.01% |
6,300
+200
| +3% | +$45.1K |
|
|
RVNC
2799
CALL
DELISTED
Revance Therapeutics, Inc.
RVNC
| $1.22M | ﹤0.01% |
39,900
| – | – |
|
2800
PUT
Keurig Dr Pepper
KDP
$40.4B
| $1.22M | ﹤0.01% |
34,600
+100
| +0.3% | +$3.5K |
|
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.