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 | |
|---|---|---|---|---|---|---|
926
PUT
QuidelOrtho
QDEL
$1.13B
| $5.5M | 0.01% |
306
-59
| -16% | -$13.1K |
|
927
PUT
Williams-Sonoma
WSM
$25.7B
| $5.48M | 0.01% |
1,076
-402
| -27% | -$20.6K |
|
928
PUT
EOG Resources
EOG
$77.5B
| $5.47M | 0.01% |
1,097
-412
| -27% | -$17.9K |
|
|
CS
929
CALL
DELISTED
Credit Suisse Group
CS
| $5.47M | 0.01% |
4,273
-182
| -4% | -$2.11K |
|
|
CLDR
930
PUT
DELISTED
Cloudera, Inc.
CLDR
| $5.45M | 0.01% |
3,921
+1,043
| +36% | +$11.9K |
|
931
PUT
ProShares Ultra S&P500
SSO
$7.82B
| $5.41M | 0.01% |
6,452
-780
| -11% | -$16K |
|
932
PUT
Nucor
NUE
$54.9B
| $5.4M | 0.01% |
1,016
+67
| +7% | +$3.46K |
|
933
CALL
Incyte
INCY
$23.3B
| $5.39M | 0.01% |
620
+321
| +107% | +$27.8K |
|
|
ATVI
934
DELISTED
Activision Blizzard
ATVI
| $5.38M | 0.01% |
57,902
+8,103
| +16% | +$658K |
|
935
CALL
Royal Gold
RGLD
$16.9B
| $5.36M | 0.01% |
504
+282
| +127% | +$32.6K |
|
936
CALL
PACCAR
PCAR
$68.8B
| $5.35M | 0.01% |
930
+504
| +118% | +$29.6K |
|
937
CALL
Synchrony
SYF
$23.3B
| $5.34M | 0.01% |
1,539
+12
| +0.8% | +$361 |
|
938
CALL
Dick's Sporting Goods
DKS
$18.3B
| $5.34M | 0.01% |
950
-39
| -4% | -$2.22K |
|
|
HUYA
939
PUT
Huya Inc
HUYA
$551M
| $5.33M | 0.01% |
+2,677
| New | +$57.3K |
|
940
CALL
Logitech
LOGI
$14.8B
| $5.33M | 0.01% |
549
-18
| -3% | -$1.55K |
|
941
CALL
General Dynamics
GD
$103B
| $5.33M | 0.01% |
358
-91
| -20% | -$13.3K |
|
942
PUT
New York Times
NYT
$11.4B
| $5.32M | 0.01% |
1,028
+522
| +103% | +$23.2K |
|
943
CALL
Diageo
DEO
$45.7B
| $5.32M | 0.01% |
335
-22
| -6% | -$3.28K |
|
944
Salesforce
CRM
$129B
| $5.32M | 0.01% |
23,904
-21,247
| -47% | -$5.17M |
|
945
CALL
Coherent
COHR
$61.3B
| $5.31M | 0.01% |
699
+331
| +90% | +$19.6K |
|
946
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$259M
| $5.31M | 0.01% |
604
+439
| +266% | +$20.6K |
|
|
ZNGA
947
CALL
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $5.3M | 0.01% |
5,374
+2,264
| +73% | +$20.4K |
|
948
PUT
Bausch Health
BHC
$1.66B
| $5.28M | 0.01% |
2,538
-521
| -17% | -$9.72K |
|
949
PUT
W.W. Grainger
GWW
$64.6B
| $5.27M | 0.01% |
129
+52
| +68% | +$20.4K |
|
950
CALL
Carlyle Group
CG
$16B
| $5.27M | 0.01% |
1,675
-371
| -18% | -$10.4K |
|
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.