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 | |
|---|---|---|---|---|---|---|
876
Hilton Worldwide
HLT
$72.9B
| $5.89M | 0.01% |
+52,949
| New | +$5.25M |
|
877
CALL
Tilray
TLRY
$493M
| $5.89M | 0.01% |
713
+131
| +23% | +$9.55K |
|
878
PUT
KLA
KLAC
$286B
| $5.85M | 0.01% |
2,260
+700
| +45% | +$16.3K |
|
879
CALL
Adient
ADNT
$1.58B
| $5.85M | 0.01% |
1,682
+128
| +8% | +$3.61K |
|
|
AVLR
880
CALL
DELISTED
Avalara, Inc.
AVLR
| $5.84M | 0.01% |
354
+69
| +24% | +$11K |
|
881
CALL
Illinois Tool Works
ITW
$79.7B
| $5.83M | 0.01% |
286
+8
| +3% | +$1.64K |
|
|
OPTU
882
PUT
Optimum Communications Inc
OPTU
$340M
| $5.82M | 0.01% |
1,537
+361
| +31% | +$11.3K |
|
883
PUT
Enterprise Products Partners
EPD
$83.9B
| $5.81M | 0.01% |
2,968
+377
| +15% | +$7.02K |
|
884
PUT
Waste Management
WM
$95.3B
| $5.81M | 0.01% |
493
-715
| -59% | -$83.4K |
|
885
CALL
Ionis Pharmaceuticals
IONS
$9.23B
| $5.81M | 0.01% |
1,028
+609
| +145% | +$30.3K |
|
886
PUT
Bloom Energy
BE
$61.8B
| $5.81M | 0.01% |
2,027
+1,366
| +207% | +$29.2K |
|
887
MSCI
MSCI
$40.2B
| $5.78M | 0.01% |
+12,949
| New | +$5.08M |
|
888
PUT
Chegg
CHGG
$109M
| $5.78M | 0.01% |
640
-536
| -46% | -$42.6K |
|
889
PUT
ScottsMiracle-Gro
SMG
$3.93B
| $5.78M | 0.01% |
290
+172
| +146% | +$29.5K |
|
890
Lam Research
LRCX
$400B
| $5.77M | 0.01% |
122,220
+76,420
| +167% | +$3.22M |
|
891
CALL
Corning
GLW
$134B
| $5.77M | 0.01% |
1,603
-318
| -17% | -$11.3K |
|
|
SPR
892
PUT
DELISTED
Spirit AeroSystems
SPR
| $5.75M | 0.01% |
1,472
+694
| +89% | +$19.9K |
|
893
CALL
Danaher
DHR
$135B
| $5.75M | 0.01% |
292
+114
| +64% | +$22.9K |
|
894
PUT
Opendoor
OPEN
$3.71B
| $5.74M | 0.01% |
2,611
+2,233
| +591% | +$46.8K |
|
895
PUT
TG Therapeutics
TGTX
$8.5B
| $5.74M | 0.01% |
1,104
+599
| +119% | +$20.2K |
|
896
CALL
HSBC
HSBC
$349B
| $5.73M | 0.01% |
2,212
-1,312
| -37% | -$31.2K |
|
897
Altria Group
MO
$120B
| $5.73M | 0.01% |
139,771
+8,221
| +6% | +$330K |
|
898
PUT
GSK
GSK
$102B
| $5.73M | 0.01% |
1,245
+88
| +8% | +$4.04K |
|
|
PSTH
899
CALL
DELISTED
Pershing Square Tontine Holdings, Ltd.
PSTH
| $5.71M | 0.01% |
2,078
+1,866
| +880% | +$45K |
|
900
CALL
Aecom
ACM
$8.69B
| $5.69M | 0.01% |
1,143
+1,083
| +1,805% | +$51.8K |
|
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.