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 | |
|---|---|---|---|---|---|---|
3726
Invesco Mortgage Capital
IVR
$795M
| $399K | ﹤0.01% |
11,830
-2,342
| -17% | -$72.5K |
|
3727
PUT
Unisys
UIS
$211M
| $399K | ﹤0.01% |
203
-220
| -52% | -$3.16K |
|
3728
CALL
XWELL
XWEL
$8.06M
| $399K | ﹤0.01% |
168
+141
| +522% | +$4.97K |
|
3729
CALL
Delek US
DK
$3.72B
| $398K | ﹤0.01% |
248
+12
| +5% | +$158 |
|
3730
PUT
BWX Technologies
BWXT
$15.5B
| $397K | ﹤0.01% |
66
-92
| -58% | -$5.3K |
|
3731
PUT
Amdocs
DOX
$6.22B
| $397K | ﹤0.01% |
56
-114
| -67% | -$7.16K |
|
3732
Gerdau
GGB
$9.74B
| $397K | ﹤0.01% |
107,213
+223
| +0.2% | +$743 |
|
3733
PUT
Lazard
LAZ
$4.16B
| $397K | ﹤0.01% |
94
+74
| +370% | +$2.8K |
|
|
NS
3734
CALL
DELISTED
NuStar Energy L.P.
NS
| $396K | ﹤0.01% |
275
+128
| +87% | +$1.64K |
|
|
COOP
3735
DELISTED
Mr. Cooper
COOP
| $395K | ﹤0.01% |
+12,737
| New | +$326K |
|
3736
PUT
MillerKnoll
MLKN
$1.64B
| $395K | ﹤0.01% |
117
-167
| -59% | -$5.81K |
|
3737
PUT
Trinity Industries
TRN
$2.3B
| $395K | ﹤0.01% |
150
-22
| -13% | -$496 |
|
|
MDLA
3738
PUT
DELISTED
Medallia, Inc.
MDLA
| $395K | ﹤0.01% |
119
-354
| -75% | -$11.3K |
|
|
TRQ
3739
CALL
DELISTED
Turquoise Hill Resources Ltd
TRQ
| $395K | ﹤0.01% |
319
+280
| +718% | +$2.71K |
|
|
KELYB
3740
CALL
Kelly Services Class B
KELYB
$792M
| $394K | ﹤0.01% |
192
+175
| +1,029% | +$3.47K |
|
|
PGRE
3741
DELISTED
Paramount Group
PGRE
| $394K | ﹤0.01% |
43,658
+34,367
| +370% | +$277K |
|
3742
PUT
TriNet
TNET
$3.09B
| $394K | ﹤0.01% |
49
-2
| -4% | -$148 |
|
|
VVNT
3743
CALL
DELISTED
Vivint Smart Home, Inc. Class A Common Stock
VVNT
| $394K | ﹤0.01% |
190
-139
| -42% | -$2.76K |
|
|
GOCO
3744
CALL
DELISTED
GoHealth
GOCO
| $393K | ﹤0.01% |
+19
| New | +$3.53K |
|
3745
Travel + Leisure Co
TNL
$4.5B
| $393K | ﹤0.01% |
+8,775
| New | +$344K |
|
3746
CALL
KRONOS Worldwide
KRO
$977M
| $392K | ﹤0.01% |
263
-124
| -32% | -$1.75K |
|
3747
Nutrien
NTR
$31.6B
| $392K | ﹤0.01% |
+8,142
| New | +$360K |
|
3748
PUT
GrafTech
EAF
$205M
| $391K | ﹤0.01% |
37
+18
| +95% | +$1.45K |
|
3749
PUT
Hilton Grand Vacations
HGV
$3.31B
| $391K | ﹤0.01% |
125
-17
| -12% | -$444 |
|
3750
PUT
Pinnacle West Capital
PNW
$12B
| $391K | ﹤0.01% |
49
+30
| +158% | +$2.47K |
|
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, 3,401 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 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.