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 | Miscellaneous | 97.69% |
| 2 | Consumer Discretionary | 0.65% |
| 3 | Technology | 0.38% |
| 4 | Healthcare | 0.33% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
951
PUT
Cheniere Energy
LNG
$60.3B
| $5.26M | 0.01% |
877
+81
| +10% | +$4.34K |
|
952
CALL
Ross Stores
ROST
$73.7B
| $5.26M | 0.01% |
428
-400
| -48% | -$41.9K |
|
953
PUT
International Paper
IP
$19.7B
| $5.25M | 0.01% |
1,114
-223
| -17% | -$9.97K |
|
954
CALL
Progressive
PGR
$127B
| $5.24M | 0.01% |
530
-162
| -23% | -$15.3K |
|
955
PUT
Cardinal Health
CAH
$57.5B
| $5.23M | 0.01% |
977
-217
| -18% | -$11.3K |
|
956
PUT
Johnson Controls International
JCI
$87.8B
| $5.23M | 0.01% |
1,123
-419
| -27% | -$18.6K |
|
957
CALL
C3.ai
AI
$1.67B
| $5.23M | 0.01% |
+377
| New | +$50.6K |
|
|
KC
958
PUT
Kingsoft Cloud Holdings
KC
$3.28B
| $5.23M | 0.01% |
1,200
+354
| +42% | +$13.1K |
|
959
CALL
10x Genomics
TXG
$8.16B
| $5.22M | 0.01% |
369
+91
| +33% | +$13.2K |
|
|
VRNT
960
CALL
DELISTED
Verint Systems
VRNT
| $5.22M | 0.01% |
1,525
+559
| +58% | +$15.9K |
|
961
PUT
Flex
FLEX
$40.5B
| $5.21M | 0.01% |
3,850
+2,309
| +150% | +$26.7K |
|
962
PUT
Nutanix
NTNX
$18.4B
| $5.21M | 0.01% |
1,635
-38
| -2% | -$1.03K |
|
|
ABMD
963
DELISTED
Abiomed Inc
ABMD
| $5.2M | 0.01% |
16,052
+6,698
| +72% | +$1.85M |
|
964
CALL
Avis
CAR
$4.9B
| $5.19M | 0.01% |
1,392
-839
| -38% | -$29.5K |
|
|
MMP
965
CALL
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $5.19M | 0.01% |
1,223
-505
| -29% | -$20.1K |
|
966
PUT
Restaurant Brands International
QSR
$28B
| $5.19M | 0.01% |
849
+3
| +0.4% | +$175 |
|
|
967
PUT
Ross Stores
ROST
$73.7B
| $5.18M | 0.01% |
422
-134
| -24% | -$14K |
|
968
PUT
Sonos
SONO
$1.82B
| $5.18M | 0.01% |
2,215
+1,771
| +399% | +$33K |
|
969
PUT
Omega Healthcare
OHI
$14.1B
| $5.17M | 0.01% |
1,424
+333
| +31% | +$11.3K |
|
970
PUT
EPR Properties
EPR
$4.6B
| $5.16M | 0.01% |
1,589
+1,076
| +210% | +$31.7K |
|
|
CHL
971
PUT
DELISTED
China Mobile Limited
CHL
| $5.16M | 0.01% |
1,809
+544
| +43% | +$16.8K |
|
|
GBT
972
PUT
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $5.16M | 0.01% |
1,191
+1,178
| +9,062% | +$58.1K |
|
973
UnitedHealth
UNH
$356B
| $5.16M | 0.01% |
14,701
-15,068
| -51% | -$5.05M |
|
|
KL
974
PUT
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $5.15M | 0.01% |
1,248
+237
| +23% | +$10.5K |
|
|
NBIS
975
CALL
Nebius Group N.V.
NBIS
$61.5B
| $5.14M | 0.01% |
739
-109
| -13% | -$6.96K |
|
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 1,710 new, 3,401 increased, 3,105 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 Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Consumer Discretionary and Technology.
- 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 1,710 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.