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 |
iShares Russell 2000 ETF
IWM
|
+$67.5M |
| 2 |
Palantir
PLTR
|
+$64.7M |
| 3 |
PARA
Paramount Global Class B
PARA
|
+$31.5M |
| 4 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$30.7M |
| 5 |
Carnival Corporation Ltd
CCL
|
+$25.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
Tesla
TSLA
|
+$53.7M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$38.1M |
| 4 |
Invesco QQQ Trust
QQQ
|
+$37.6M |
| 5 |
AutoZone
AZO
|
+$28.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.65% |
| 2 | Consumer Discretionary | 0.49% |
| 3 | Healthcare | 0.32% |
| 4 | Financials | 0.3% |
| 5 | Industrials | 0.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SOS
726
CALL
SOS Limited
SOS
$18.2M
| $5.72M | 0.01% |
+15
| New | +$58.9K |
|
727
PUT
ChargePoint
CHPT
$136M
| $5.72M | 0.01% |
107
+4
| +4% | +$2.7K |
|
|
LAZR
728
PUT
DELISTED
Luminar Technologies
LAZR
| $5.71M | 0.01% |
157
+26
| +20% | +$11.8K |
|
729
PUT
Coherent
COHR
$56.7B
| $5.7M | 0.01% |
834
+687
| +467% | +$56.4K |
|
730
PUT
Check Point Software Technologies
CHKP
$13.2B
| $5.7M | 0.01% |
509
-73
| -13% | -$8.79K |
|
731
Zoom
ZM
$25.5B
| $5.69M | 0.01% |
17,713
+17,658
| +32,105% | +$6.5M |
|
732
PUT
Regency Centers
REG
$14.9B
| $5.69M | 0.01% |
1,003
-343
| -25% | -$17.9K |
|
733
Bank of America
BAC
$436B
| $5.69M | 0.01% |
147,007
+142,327
| +3,041% | +$4.91M |
|
734
CALL
BioMarin Pharmaceuticals
BMRN
$11.4B
| $5.68M | 0.01% |
752
-1,275
| -63% | -$104K |
|
|
CZOO
735
CALL
DELISTED
Cazoo Group Ltd
CZOO
| $5.68M | 0.01% |
+3
| New | +$69.7K |
|
|
TTM.RT
736
PUT
DELISTED
TATA MOTORS LIMITED RT PUR ADR
TTM.RT
| $5.67M | 0.01% |
2,727
+1,007
| +59% | +$2.09M |
|
|
FTCH
737
CALL
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $5.67M | 0.01% |
1,069
+181
| +20% | +$11.1K |
|
|
LAZR
738
CALL
DELISTED
Luminar Technologies
LAZR
| $5.66M | 0.01% |
155
-7
| -4% | -$3.17K |
|
739
PUT
Wheaton Precious Metals
WPM
$50.9B
| $5.66M | 0.01% |
1,480
-117
| -7% | -$4.64K |
|
740
JD.com
JD
$40.9B
| $5.64M | 0.01% |
66,923
+22,140
| +49% | +$2.03M |
|
|
IAA
741
PUT
DELISTED
IAA, Inc. Common Stock
IAA
| $5.64M | 0.01% |
1,023
+998
| +3,992% | +$59.2K |
|
|
ORGN
742
CALL
DELISTED
Origin Materials
ORGN
| $5.61M | 0.01% |
+185
| New | +$60.9K |
|
743
PayPal
PYPL
$49.4B
| $5.6M | 0.01% |
+23,052
| New | +$5.82M |
|
744
CALL
Humana
HUM
$47.2B
| $5.58M | 0.01% |
133
-169
| -56% | -$67.5K |
|
|
FTCH
745
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $5.57M | 0.01% |
105,110
+87,001
| +480% | +$5.32M |
|
746
PUT
British American Tobacco
BTI
$132B
| $5.56M | 0.01% |
1,435
+502
| +54% | +$18.9K |
|
|
GOOS
747
PUT
Canada Goose Holdings
GOOS
$873M
| $5.56M | 0.01% |
1,416
+2
| +0.1% | +$79 |
|
748
CALL
Estee Lauder
EL
$29.1B
| $5.55M | 0.01% |
191
+24
| +14% | +$6.57K |
|
749
Beyond Meat
BYND
$286M
| $5.55M | 0.01% |
42,650
-19,019
| -31% | -$2.8M |
|
|
FIRY
750
PUT
Firy Inc
FIRY
$128M
| $5.54M | 0.01% |
146
+69
| +90% | +$39.6K |
|
Similar funds
Simplex Trading's Q1 2021 Portfolio in Review
As of Q1 2021, Simplex Trading held 10,706 positions worth $55.7B, down 28% from $77.2B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading withdrew a net $23.5B in Q1 2021, closing 1,706 positions and reducing 3,151 holdings. Its most notable exit was Alphabet (Google) Class C, an estimated $38.1M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.65% of assets, up from 0.37% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Pfizer worth $16.8M.
- Simplex Trading's largest Q1 2021 buy was Pfizer: 464,628 shares worth $16.8M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q1 2021, an estimated $67.5M increase.
- Simplex Trading's biggest Q1 2021 reduction was Amazon, cutting an estimated $66M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2021, selling an estimated $38.1M.
- Simplex Trading's ten largest holdings make up 43% of its $55.7B portfolio in Q1 2021.
- Simplex Trading opened 2,258 new positions and closed 1,706 in Q1 2021.
- Simplex Trading's portfolio value fell 28% quarter-over-quarter to $55.7B.
Based on Simplex Trading's 13F filing for Q1 2021, filed 26 Apr 2021.