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 | |
|---|---|---|---|---|---|---|
2301
Warrior Met Coal
HCC
$4.23B
| $1.23M | ﹤0.01% |
+57,616
| New | +$1.01M |
|
2302
PUT
GoPro
GPRO
$116M
| $1.23M | ﹤0.01% |
1,481
+506
| +52% | +$3.65K |
|
|
API
2303
Agora
API
$326M
| $1.23M | ﹤0.01% |
30,973
+10,359
| +50% | +$428K |
|
|
GOEV
2304
PUT
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $1.23M | ﹤0.01% |
2
+1
| +100% | +$5.91K |
|
|
PRSP
2305
DELISTED
Perspecta Inc. Common Stock
PRSP
| $1.23M | ﹤0.01% |
50,888
+23,440
| +85% | +$503K |
|
2306
CALL
Bio-Rad Laboratories Class A
BIO
$8.42B
| $1.22M | ﹤0.01% |
21
+11
| +110% | +$6.26K |
|
2307
CALL
CBAK Energy Technology Ltd
CBAT
$46.3M
| $1.22M | ﹤0.01% |
+2,420
| New | +$11.8K |
|
2308
CALL
Charles River Laboratories
CRL
$10.9B
| $1.22M | ﹤0.01% |
49
-137
| -74% | -$32.6K |
|
2309
CALL
SSR Mining
SSRM
$5.57B
| $1.22M | ﹤0.01% |
609
-440
| -42% | -$8.39K |
|
|
TUP
2310
CALL
DELISTED
Tupperware Brands Corporation
TUP
| $1.22M | ﹤0.01% |
378
-287
| -43% | -$8.46K |
|
|
ARNC
2311
PUT
DELISTED
Arconic Corporation
ARNC
| $1.22M | ﹤0.01% |
411
+353
| +609% | +$9.29K |
|
|
PE
2312
CALL
DELISTED
PARSLEY ENERGY INC
PE
| $1.22M | ﹤0.01% |
862
-1,187
| -58% | -$14.1K |
|
|
NNDM
2313
CALL
Nano Dimension
NNDM
$309M
| $1.22M | ﹤0.01% |
+1,345
| New | +$6.82K |
|
2314
Lennar Class A
LEN
$20.4B
| $1.22M | ﹤0.01% |
+16,563
| New | +$1.24M |
|
2315
PUT
3D Systems Corp
DDD
$420M
| $1.22M | ﹤0.01% |
1,165
+260
| +29% | +$2.11K |
|
2316
Direxion Daily S&P Oil & Gas Exp. & Prod. Bear 2X ETF
DRIP
$103M
| $1.22M | ﹤0.01% |
460
+166
| +56% | +$766K |
|
|
GOEV
2317
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $1.22M | ﹤0.01% |
+192
| New | +$1.14M |
|
2318
PagSeguro Digital
PAGS
$2.57B
| $1.22M | ﹤0.01% |
+21,409
| New | +$961K |
|
2319
Blackrock
BLK
$164B
| $1.21M | ﹤0.01% |
+1,683
| New | +$1.12M |
|
|
BAND
2320
PUT
Bandwidth Inc
BAND
$1.91B
| $1.21M | ﹤0.01% |
79
-2
| -2% | -$330 |
|
2321
PUT
Philips
PHG
$25.4B
| $1.21M | ﹤0.01% |
276
-304
| -52% | -$12.6K |
|
2322
PUT
Dover
DOV
$27.2B
| $1.21M | ﹤0.01% |
96
+74
| +336% | +$8.79K |
|
2323
PUT
T. Rowe Price
TROW
$25B
| $1.21M | ﹤0.01% |
80
-327
| -80% | -$46.8K |
|
2324
Corsair Gaming
CRSR
$1.05B
| $1.21M | ﹤0.01% |
+33,396
| New | +$1.02M |
|
2325
PUT
Leggett & Platt
LEG
$1.52B
| $1.21M | ﹤0.01% |
273
+145
| +113% | +$6.22K |
|
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.