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 | |
|---|---|---|---|---|---|---|
3451
Akamai
AKAM
$16.4B
| $491K | ﹤0.01% |
+4,684
| New | +$490K |
|
3452
PUT
Scotiabank
BNS
$106B
| $491K | ﹤0.01% |
91
-119
| -57% | -$5.64K |
|
3453
PUT
Ternium
TX
$9.37B
| $491K | ﹤0.01% |
169
+105
| +164% | +$2.59K |
|
|
ACIA
3454
DELISTED
Acacia Communications Inc
ACIA
| $491K | ﹤0.01% |
6,739
+1,620
| +32% | +$112K |
|
3455
CALL
NewtekOne
NEWT
$415M
| $490K | ﹤0.01% |
249
+236
| +1,815% | +$4.25K |
|
3456
CALL
Plains GP Holdings
PAGP
$5.16B
| $490K | ﹤0.01% |
581
+249
| +75% | +$1.93K |
|
3457
Eaton
ETN
$155B
| $489K | ﹤0.01% |
+4,077
| New | +$461K |
|
3458
PUT
LPL Financial
LPLA
$26.5B
| $489K | ﹤0.01% |
47
-39
| -45% | -$3.5K |
|
3459
CALL
Middleby
MIDD
$6.15B
| $489K | ﹤0.01% |
38
+7
| +23% | +$845 |
|
3460
PUT
Molina Healthcare
MOH
$10.4B
| $489K | ﹤0.01% |
23
-374
| -94% | -$77.2K |
|
|
BFX
3461
DELISTED
BowFlex Inc.
BFX
| $488K | ﹤0.01% |
26,953
-58,715
| -69% | -$1.22M |
|
3462
Cenovus Energy
CVE
$52.3B
| $487K | ﹤0.01% |
80,638
+29,074
| +56% | +$136K |
|
3463
CALL
Tenable Holdings
TENB
$3.58B
| $486K | ﹤0.01% |
93
+50
| +116% | +$1.98K |
|
3464
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$161M
| $486K | ﹤0.01% |
452
+446
| +7,433% | +$579K |
|
|
MNR
3465
PUT
DELISTED
Monmouth Real Estate Investment Corp
MNR
| $486K | ﹤0.01% |
281
+274
| +3,914% | +$4.13K |
|
3466
PUT
Century Communities
CCS
$2.03B
| $485K | ﹤0.01% |
111
+77
| +226% | +$3.39K |
|
3467
Insperity
NSP
$1.92B
| $485K | ﹤0.01% |
5,958
+4,383
| +278% | +$360K |
|
|
APRN
3468
PUT
DELISTED
Blue Apron Holdings, Inc. Class A Common Stock
APRN
| $485K | ﹤0.01% |
72
-19
| -21% | -$1.47K |
|
|
WWE
3469
DELISTED
World Wrestling Entertainment
WWE
| $485K | ﹤0.01% |
+10,107
| New | +$424K |
|
3470
CALL
uniQure
QURE
$2.63B
| $484K | ﹤0.01% |
134
+29
| +28% | +$1.22K |
|
3471
PUT
Alliance Resource Partners
ARLP
$3.3B
| $483K | ﹤0.01% |
1,079
+693
| +180% | +$2.65K |
|
3472
CALL
American Superconductor
AMSC
$1.48B
| $482K | ﹤0.01% |
206
-15
| -7% | -$266 |
|
3473
PUT
ATI
ATI
$26.3B
| $482K | ﹤0.01% |
288
-56
| -16% | -$711 |
|
3474
CALL
Werner Enterprises
WERN
$2.42B
| $482K | ﹤0.01% |
123
+74
| +151% | +$3.01K |
|
3475
PUT
DaVita
DVA
$15.2B
| $481K | ﹤0.01% |
41
-2
| -5% | -$204 |
|
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.