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 | |
|---|---|---|---|---|---|---|
2376
Lattice Semiconductor
LSCC
$17.6B
| $1.15M | ﹤0.01% |
25,092
+3,196
| +15% | +$124K |
|
2377
ProShares Ultra Gold
UGL
$650M
| $1.15M | ﹤0.01% |
67,408
-174,052
| -72% | -$2.92M |
|
2378
CALL
Energizer
ENR
$1.44B
| $1.15M | ﹤0.01% |
272
+211
| +346% | +$8.91K |
|
2379
CALL
Barclays
BCS
$94.1B
| $1.15M | ﹤0.01% |
1,435
+406
| +39% | +$2.72K |
|
2380
CALL
Crocs
CROX
$6.69B
| $1.15M | ﹤0.01% |
183
-61
| -25% | -$3.48K |
|
2381
CALL
Gen Digital
GEN
$15.6B
| $1.15M | ﹤0.01% |
552
-268
| -33% | -$5.41K |
|
2382
CALL
Southern Copper
SCCO
$141B
| $1.15M | ﹤0.01% |
190
+153
| +414% | +$7.87K |
|
|
WCC
2383
CALL
WESCO International
WCC
$16.2B
| $1.15M | ﹤0.01% |
146
+131
| +873% | +$7.76K |
|
|
TBHC
2384
DELISTED
The Brand House Collective
TBHC
| $1.15M | ﹤0.01% |
64,053
+40,731
| +175% | +$557K |
|
2385
CALL
Corpay
CPAY
$24.2B
| $1.15M | ﹤0.01% |
42
-58
| -58% | -$14.9K |
|
|
CLDR
2386
DELISTED
Cloudera, Inc.
CLDR
| $1.14M | ﹤0.01% |
82,305
-32,438
| -28% | -$372K |
|
2387
CALL
Equinix
EQIX
$107B
| $1.14M | ﹤0.01% |
16
-2
| -11% | -$1.49K |
|
|
IPFF
2388
PUT
DELISTED
iShares International Preferred Stock ETF
IPFF
| $1.14M | ﹤0.01% |
1,063
-464
| -30% | -$6.83K |
|
2389
Direxion Daily Energy Bull 2X ETF
ERX
$249M
| $1.14M | ﹤0.01% |
79,540
+24,069
| +43% | +$292K |
|
2390
CALL
Motorola Solutions
MSI
$69.4B
| $1.14M | ﹤0.01% |
67
-91
| -58% | -$15.3K |
|
|
ABK
2391
CALL
DELISTED
Ambac Financial Group
ABK
| $1.14M | ﹤0.01% |
741
+527
| +246% | +$810K |
|
2392
CALL
The GEO Group
GEO
$4.13B
| $1.14M | ﹤0.01% |
1,285
+940
| +272% | +$9.01K |
|
2393
J.M. Smucker
SJM
$12.6B
| $1.14M | ﹤0.01% |
9,852
+5,271
| +115% | +$613K |
|
2394
PUT
Popular Inc
BPOP
$11B
| $1.14M | ﹤0.01% |
202
-194
| -49% | -$9.21K |
|
2395
CALL
Infosys
INFY
$45B
| $1.14M | ﹤0.01% |
671
-846
| -56% | -$12.9K |
|
|
NUAN
2396
PUT
DELISTED
Nuance Communications, Inc.
NUAN
| $1.14M | ﹤0.01% |
374
+192
| +105% | +$7.28K |
|
2397
US Physical Therapy
USPH
$1.14B
| $1.14M | ﹤0.01% |
+9,448
| New | +$953K |
|
|
BAND
2398
Bandwidth Inc
BAND
$1.91B
| $1.13M | ﹤0.01% |
7,381
+3,502
| +90% | +$577K |
|
2399
Perion Network
PERI
$367M
| $1.13M | ﹤0.01% |
89,151
+57,008
| +177% | +$504K |
|
2400
PUT
CDW
CDW
$17.1B
| $1.13M | ﹤0.01% |
+86
| New | +$11.3K |
|
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.