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 |
Alibaba
BABA
|
+$39.9M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$39M |
| 3 |
Mastercard
MA
|
+$31.3M |
| 4 |
Apple
AAPL
|
+$25.3M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$25.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
JPMorgan Chase
JPM
|
+$52.8M |
| 2 |
TSMC
TSM
|
+$43M |
| 3 |
Amazon
AMZN
|
+$24.7M |
| 4 |
iShares Silver Trust
SLV
|
+$24.2M |
| 5 |
Netflix
NFLX
|
+$21.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.65% |
| 2 | Technology | 0.37% |
| 3 | Healthcare | 0.33% |
| 4 | Industrials | 0.21% |
| 5 | Communication Services | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
976
CALL
Tandem Diabetes Care
TNDM
$1.16B
| $5.13M | 0.01% |
536
-1
| -0.2% | -$103 |
|
977
PUT
Alaska Air
ALK
$4.99B
| $5.12M | 0.01% |
985
-152
| -13% | -$6.84K |
|
978
CALL
Synaptics
SYNA
$4.59B
| $5.12M | 0.01% |
531
+425
| +401% | +$34.6K |
|
979
PUT
Travelers Companies
TRV
$78.5B
| $5.09M | 0.01% |
363
-69
| -16% | -$8.86K |
|
980
PUT
Dick's Sporting Goods
DKS
$18.3B
| $5.09M | 0.01% |
906
+62
| +7% | +$3.53K |
|
|
RMO
981
PUT
DELISTED
Romeo Power, Inc.
RMO
| $5.08M | 0.01% |
+2,261
| New | +$33K |
|
982
CALL
International Paper
IP
$20.1B
| $5.08M | 0.01% |
1,078
-405
| -27% | -$18.1K |
|
983
PUT
Danaher
DHR
$135B
| $5.06M | 0.01% |
257
+175
| +213% | +$35.1K |
|
984
PUT
Adient
ADNT
$1.58B
| $5.05M | 0.01% |
1,453
-226
| -13% | -$6.37K |
|
|
CYBR
985
PUT
DELISTED
CyberArk
CYBR
| $5.04M | 0.01% |
312
+72
| +30% | +$8.38K |
|
986
PUT
Omnicom Group
OMC
$22.2B
| $5.04M | 0.01% |
808
-48
| -6% | -$2.74K |
|
987
Qualcomm
QCOM
$180B
| $5.04M | 0.01% |
+33,072
| New | +$4.61M |
|
|
CGC
988
CALL
Canopy Growth
CGC
$382M
| $5.03M | 0.01% |
204
-121
| -37% | -$27.6K |
|
|
JKS
989
PUT
JinkoSolar
JKS
$825M
| $5.03M | 0.01% |
813
+589
| +263% | +$37.2K |
|
990
PUT
ArcelorMittal
MT
$49.9B
| $5.02M | 0.01% |
2,194
+829
| +61% | +$14.5K |
|
991
PUT
Automatic Data Processing
ADP
$97.1B
| $5M | 0.01% |
284
-142
| -33% | -$23.3K |
|
992
PUT
Fomento Económico Mexicano
FMX
$43.3B
| $5M | 0.01% |
660
+463
| +235% | +$31K |
|
993
CALL
Nucor
NUE
$54.9B
| $4.97M | 0.01% |
935
-532
| -36% | -$27.5K |
|
994
CALL
Molson Coors Class B
TAP
$7.51B
| $4.97M | 0.01% |
1,100
-131
| -11% | -$5.4K |
|
995
CALL
HCA Healthcare
HCA
$83.5B
| $4.97M | 0.01% |
302
-132
| -30% | -$19.3K |
|
996
CALL
Weyerhaeuser
WY
$17B
| $4.95M | 0.01% |
1,477
+455
| +45% | +$13.7K |
|
997
CALL
Teradyne
TER
$58.5B
| $4.95M | 0.01% |
413
+1
| +0.2% | +$102 |
|
998
PUT
AngloGold Ashanti
AU
$39.7B
| $4.94M | 0.01% |
2,185
+372
| +21% | +$8.92K |
|
999
CALL
Hormel Foods
HRL
$13.8B
| $4.94M | 0.01% |
1,060
+99
| +10% | +$4.83K |
|
|
MRSH
1000
PUT
Marsh
MRSH
$84.2B
| $4.91M | 0.01% |
420
+278
| +196% | +$31.6K |
|
Similar funds
Simplex Trading's Q4 2020 Portfolio in Review
As of Q4 2020, Simplex Trading held 9,568 positions worth $77.2B, up 5% from $73.5B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading's Q4 2020 filing shows 1,711 new, 3,402 increased, 3,106 reduced and 1,157 closed positions. Its largest new stake was Alibaba: 143,630 shares worth $33.4M. The largest sale was JPMorgan Chase, an estimated $52.8M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.65% of assets, up from 0.53% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q4 2020 buy was Alibaba: 143,630 shares worth $33.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q4 2020, an estimated $39M increase.
- Simplex Trading's biggest Q4 2020 reduction was JPMorgan Chase, cutting an estimated $52.8M.
- Simplex Trading fully exited Target in Q4 2020, selling an estimated $14.3M.
- Simplex Trading's ten largest holdings make up 42% of its $77.2B portfolio in Q4 2020.
- Simplex Trading opened 1,711 new positions and closed 1,157 in Q4 2020.
- Simplex Trading's portfolio value rose 5% quarter-over-quarter to $77.2B.
Based on Simplex Trading's 13F filing for Q4 2020, filed 2 Feb 2021.