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 | |
|---|---|---|---|---|---|---|
1476
CALL
Blink Charging
BLNK
$75.2M
| $2.68M | ﹤0.01% |
628
+231
| +58% | +$4.57K |
|
1477
CALL
Gentex
GNTX
$4.88B
| $2.68M | ﹤0.01% |
790
-30
| -4% | -$925 |
|
1478
Danaher
DHR
$135B
| $2.67M | ﹤0.01% |
13,585
+12,042
| +780% | +$2.41M |
|
1479
PUT
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $2.67M | ﹤0.01% |
1,484
-916
| -38% | -$45.7K |
|
1480
Caesars Entertainment
CZR
$6.1B
| $2.67M | ﹤0.01% |
+35,944
| New | +$2.25M |
|
|
RAD
1481
PUT
DELISTED
Rite Aid Corporation
RAD
| $2.67M | ﹤0.01% |
1,687
-228
| -12% | -$2.93K |
|
1482
CALL
Plains All American Pipeline
PAA
$17.4B
| $2.67M | ﹤0.01% |
3,237
+2,789
| +623% | +$21.2K |
|
|
AXON
1483
PUT
Axon Enterprise
AXON
$40.5B
| $2.66M | ﹤0.01% |
217
+34
| +19% | +$3.9K |
|
|
CGC
1484
PUT
Canopy Growth
CGC
$375M
| $2.66M | ﹤0.01% |
108
-23
| -18% | -$5.24K |
|
|
DAY
1485
PUT
DELISTED
Dayforce
DAY
| $2.65M | ﹤0.01% |
249
+72
| +41% | +$6.8K |
|
1486
PUT
Repligen
RGEN
$7.44B
| $2.64M | ﹤0.01% |
138
-29
| -17% | -$5.28K |
|
1487
CALL
Sysco
SYY
$39.7B
| $2.64M | ﹤0.01% |
356
-1,844
| -84% | -$127K |
|
1488
PUT
Equinix
EQIX
$107B
| $2.64M | ﹤0.01% |
37
-11
| -23% | -$8.19K |
|
1489
Equifax
EFX
$20.3B
| $2.64M | ﹤0.01% |
13,696
+10,753
| +365% | +$1.81M |
|
1490
State Street Health Care Select Sector SPDR ETF
XLV
$42.1B
| $2.64M | ﹤0.01% |
23,262
+23,062
| +11,531% | +$2.52M |
|
1491
PUT
Canadian Pacific Kansas City
CP
$82B
| $2.63M | ﹤0.01% |
380
+365
| +2,433% | +$23.8K |
|
|
XEC
1492
CALL
DELISTED
CIMAREX ENERGY CO
XEC
| $2.63M | ﹤0.01% |
702
+219
| +45% | +$7.01K |
|
|
BLUE
1493
CALL
DELISTED
bluebird bio
BLUE
| $2.63M | ﹤0.01% |
47
-6
| -11% | -$3.8K |
|
1494
CALL
iShares Convertible Bond ETF
ICVT
$7.23B
| $2.63M | ﹤0.01% |
888
+462
| +108% | +$40.9K |
|
1495
CALL
Becton Dickinson
BDX
$43.1B
| $2.63M | ﹤0.01% |
108
-84
| -44% | -$19.6K |
|
1496
PUT
Hyliion Holdings
HYLN
$663M
| $2.63M | ﹤0.01% |
1,593
-650
| -29% | -$14.8K |
|
1497
PUT
Weibo
WB
$1.9B
| $2.62M | ﹤0.01% |
639
-97
| -13% | -$4.1K |
|
1498
PUT
Welltower
WELL
$178B
| $2.62M | ﹤0.01% |
405
-440
| -52% | -$26.7K |
|
1499
PUT
Ambarella
AMBA
$2.99B
| $2.62M | ﹤0.01% |
285
+35
| +14% | +$2.45K |
|
1500
Intuitive Surgical
ISRG
$121B
| $2.61M | ﹤0.01% |
9,576
+8,709
| +1,004% | +$2.16M |
|
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.