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 | |
|---|---|---|---|---|---|---|
3201
PUT
Healthcare Services Group
HCSG
$1.58B
| $592K | ﹤0.01% |
211
-73
| -26% | -$1.77K |
|
|
DOC
3202
CALL
DELISTED
PHYSICIANS REALTY TRUST
DOC
| $592K | ﹤0.01% |
333
+107
| +47% | +$1.92K |
|
3203
PUT
Howmet Aerospace
HWM
$115B
| $590K | ﹤0.01% |
255
+102
| +67% | +$2.27K |
|
3204
Ormat Technologies
ORA
$6.28B
| $590K | ﹤0.01% |
6,543
+6,299
| +2,582% | +$477K |
|
3205
CALL
UGI
UGI
$7.91B
| $590K | ﹤0.01% |
169
-290
| -63% | -$10.1K |
|
3206
CALL
Casey's General Stores
CASY
$31.6B
| $589K | ﹤0.01% |
33
-50
| -60% | -$9.07K |
|
3207
CALL
Radware
RDWR
$1.23B
| $588K | ﹤0.01% |
212
-198
| -48% | -$4.95K |
|
|
AMRN
3208
Amarin Corp
AMRN
$290M
| $587K | ﹤0.01% |
6,012
-6,116
| -50% | -$590K |
|
3209
PUT
Sportsman's Warehouse
SPWH
$44.9M
| $587K | ﹤0.01% |
335
+263
| +365% | +$3.85K |
|
3210
PUT
BlackLine
BL
$1.8B
| $586K | ﹤0.01% |
44
-16
| -27% | -$1.78K |
|
3211
CALL
Deluxe
DLX
$1.22B
| $586K | ﹤0.01% |
201
-109
| -35% | -$2.81K |
|
3212
CALL
Funko
FNKO
$342M
| $586K | ﹤0.01% |
565
+541
| +2,254% | +$4.46K |
|
3213
PUT
Greif
GEF
$4.56B
| $586K | ﹤0.01% |
125
+99
| +381% | +$4.48K |
|
3214
CALL
Karyopharm Therapeutics
KPTI
$161M
| $585K | ﹤0.01% |
25
-6
| -19% | -$1.39K |
|
3215
PUT
AquaBounty Technologies
AQB
$4.63M
| $584K | ﹤0.01% |
+33
| New | +$3.67K |
|
3216
PUT
Ceragon Networks
CRNT
$197M
| $584K | ﹤0.01% |
2,102
+2,042
| +3,403% | +$5.23K |
|
|
SPI
3217
CALL
DELISTED
SPI Energy Co., Ltd. Ordinary Shares
SPI
| $584K | ﹤0.01% |
741
+722
| +3,800% | +$6.05K |
|
|
VTLE
3218
PUT
DELISTED
Vital Energy
VTLE
| $583K | ﹤0.01% |
296
-7
| -2% | -$90 |
|
|
WDR
3219
CALL
DELISTED
Waddell & Reed Financial, Inc.
WDR
| $583K | ﹤0.01% |
229
+186
| +433% | +$3.58K |
|
3220
PUT
AeroVironment
AVAV
$7.81B
| $582K | ﹤0.01% |
67
-2
| -3% | -$161 |
|
3221
PUT
Bio-Rad Laboratories Class A
BIO
$8.47B
| $582K | ﹤0.01% |
10
+7
| +233% | +$3.99K |
|
3222
Coca-Cola Europacific Partners
CCEP
$48.1B
| $582K | ﹤0.01% |
11,684
+4,358
| +59% | +$184K |
|
3223
Exelixis
EXEL
$14B
| $582K | ﹤0.01% |
29,000
+16,897
| +140% | +$354K |
|
3224
CALL
Axos Financial
AX
$5.45B
| $581K | ﹤0.01% |
155
-143
| -48% | -$4.52K |
|
|
AXNX
3225
DELISTED
Axonics, Inc. Common Stock
AXNX
| $581K | ﹤0.01% |
11,648
+1,089
| +10% | +$51.1K |
|
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.