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 | |
|---|---|---|---|---|---|---|
1851
CALL
Red Rock Resorts
RRR
$3.74B
| $1.85M | ﹤0.01% |
740
-2,415
| -77% | -$51.4K |
|
1852
Equinox Gold
EQX
$7.32B
| $1.85M | ﹤0.01% |
179,061
+70,018
| +64% | +$764K |
|
1853
PUT
Antero Resources
AR
$10.9B
| $1.85M | ﹤0.01% |
3,393
+1,393
| +70% | +$5.71K |
|
1854
CALL
Cirrus Logic
CRUS
$6.74B
| $1.85M | ﹤0.01% |
225
| – | – |
|
1855
CALL
Woodward
WWD
$25B
| $1.85M | ﹤0.01% |
152
-87
| -36% | -$8.83K |
|
|
IPOF
1856
DELISTED
Social Capital Hedosophia Holdings Corp. VI
IPOF
| $1.85M | ﹤0.01% |
+150,188
| New | +$1.71M |
|
|
CPE
1857
CALL
DELISTED
Callon Petroleum Company
CPE
| $1.85M | ﹤0.01% |
1,403
+291
| +26% | +$2.51K |
|
|
LAC
1858
PUT
DELISTED
Lithium Americas Corp. Common Shares
LAC
| $1.85M | ﹤0.01% |
1,471
+1,237
| +529% | +$13.9K |
|
1859
Bath & Body Works
BBWI
$4.01B
| $1.84M | ﹤0.01% |
61,193
-14,233
| -19% | -$413K |
|
1860
CALL
VeriSign
VRSN
$25.3B
| $1.84M | ﹤0.01% |
85
+36
| +73% | +$7.37K |
|
1861
PUT
Mid-America Apartment Communities
MAA
$15.6B
| $1.84M | ﹤0.01% |
145
+49
| +51% | +$6.05K |
|
1862
CALL
Robert Half
RHI
$3.61B
| $1.84M | ﹤0.01% |
294
-327
| -53% | -$19.5K |
|
|
MAXR
1863
PUT
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $1.84M | ﹤0.01% |
476
-197
| -29% | -$5.79K |
|
1864
Amplify Blockchain Technology ETF
BLOK
$1.1B
| $1.83M | ﹤0.01% |
52,481
+48,992
| +1,404% | +$1.39M |
|
|
KYNB
1865
PUT
Kyntra Bio
KYNB
$28.5M
| $1.83M | ﹤0.01% |
20
+13
| +186% | +$13.7K |
|
1866
CALL
KKR & Co
KKR
$89.2B
| $1.83M | ﹤0.01% |
452
-90
| -17% | -$3.4K |
|
1867
State Street SPDR S&P Regional Banking ETF
KRE
$4.86B
| $1.83M | ﹤0.01% |
+35,226
| New | +$1.61M |
|
1868
PUT
Carlyle Group
CG
$16.3B
| $1.83M | ﹤0.01% |
581
+117
| +25% | +$3.29K |
|
1869
PUT
Rambus
RMBS
$10.4B
| $1.83M | ﹤0.01% |
1,046
+957
| +1,075% | +$15K |
|
1870
PUT
Ingredion
INGR
$6.38B
| $1.82M | ﹤0.01% |
232
+172
| +287% | +$13.3K |
|
1871
Toll Brothers
TOL
$14B
| $1.82M | ﹤0.01% |
41,866
-10,280
| -20% | -$477K |
|
1872
CALL
Lincoln National
LNC
$7.91B
| $1.82M | ﹤0.01% |
361
+23
| +7% | +$978 |
|
|
BAND
1873
CALL
Bandwidth Inc
BAND
$1.91B
| $1.81M | ﹤0.01% |
118
+51
| +76% | +$8.41K |
|
|
INFN
1874
CALL
DELISTED
Infinera Corporation Common Stock
INFN
| $1.81M | ﹤0.01% |
1,729
+1,055
| +157% | +$8.37K |
|
1875
CALL
KE Holdings
BEKE
$16.8B
| $1.81M | ﹤0.01% |
294
+267
| +989% | +$17.7K |
|
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.