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 | |
|---|---|---|---|---|---|---|
4576
PUT
Akebia Therapeutics
AKBA
$338M
| $203K | ﹤0.01% |
725
-229
| -24% | -$669 |
|
4577
Edison International
EIX
$30.3B
| $203K | ﹤0.01% |
+3,238
| New | +$195K |
|
|
KYNB
4578
Kyntra Bio
KYNB
$27.4M
| $203K | ﹤0.01% |
220
+208
| +1,733% | +$219K |
|
4579
CALL
Fuel Tech
FTEK
$43M
| $203K | ﹤0.01% |
525
+462
| +733% | +$1.05K |
|
4580
Regal Rexnord
RRX
$12.5B
| $203K | ﹤0.01% |
1,654
-1,983
| -55% | -$219K |
|
4581
CALL
Sasol
SSL
$7.4B
| $203K | ﹤0.01% |
230
+94
| +69% | +$704 |
|
4582
TTEC Holdings
TTEC
$124M
| $203K | ﹤0.01% |
2,791
+608
| +28% | +$39.4K |
|
|
TGR
4583
PUT
DELISTED
ISHARES TARGET DATE RETIREMENT INCOME ETF
TGR
| $203K | ﹤0.01% |
116
-31
| -21% | -$54.3K |
|
4584
Alpha and Omega Semiconductor
AOSL
$829M
| $202K | ﹤0.01% |
8,550
+2,920
| +52% | +$59.6K |
|
|
EXK
4585
PUT
Endeavour Silver
EXK
$2.24B
| $202K | ﹤0.01% |
401
-432
| -52% | -$1.6K |
|
4586
iShares Core MSCI EAFE ETF
IEFA
$186B
| $202K | ﹤0.01% |
2,929
-2,062
| -41% | -$133K |
|
4587
PUT
Quaker Houghton
KWR
$2.58B
| $202K | ﹤0.01% |
8
-111
| -93% | -$25.1K |
|
|
NGD
4588
DELISTED
New Gold Inc
NGD
| $202K | ﹤0.01% |
92,441
-107,738
| -54% | -$219K |
|
|
BCOV
4589
PUT
DELISTED
Brightcove, Inc.
BCOV
| $202K | ﹤0.01% |
110
+10
| +10% | +$143 |
|
|
ASAP
4590
CALL
DELISTED
Waitr Holdings Inc. Common Stock
ASAP
| $202K | ﹤0.01% |
36
+22
| +157% | +$1.42K |
|
|
NAV
4591
PUT
DELISTED
Navistar International
NAV
| $202K | ﹤0.01% |
+46
| New | +$2K |
|
4592
CALL
Century Casinos
CNTY
$32.9M
| $201K | ﹤0.01% |
315
+139
| +79% | +$803 |
|
4593
PUT
Ichor Holdings
ICHR
$2.17B
| $201K | ﹤0.01% |
67
-65
| -49% | -$1.84K |
|
4594
Regis Corp
RGS
$68.4M
| $201K | ﹤0.01% |
1,099
+458
| +71% | +$69.8K |
|
4595
PUT
Televisa
TV
$1.49B
| $201K | ﹤0.01% |
244
+177
| +264% | +$1.35K |
|
4596
PUT
Andersons Inc
ANDE
$2.39B
| $200K | ﹤0.01% |
82
+56
| +215% | +$1.24K |
|
4597
Dine Brands
DIN
$462M
| $200K | ﹤0.01% |
3,452
-2,337
| -40% | -$142K |
|
4598
CALL
Hilltop Holdings
HTH
$2.26B
| $200K | ﹤0.01% |
73
-142
| -66% | -$3.41K |
|
4599
Kratos Defense & Security Solutions
KTOS
$8.23B
| $200K | ﹤0.01% |
7,312
-7,942
| -52% | -$174K |
|
4600
CALL
Lineage Cell Therapeutics
LCTX
$264M
| $200K | ﹤0.01% |
1,140
+1,042
| +1,063% | +$1.46K |
|
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.