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 | |
|---|---|---|---|---|---|---|
3251
AGNC Investment
AGNC
$12.4B
| $569K | ﹤0.01% |
+36,532
| New | +$540K |
|
3252
CALL
Alpha Pro Tech
APT
$50.2M
| $569K | ﹤0.01% |
511
+194
| +61% | +$2.62K |
|
3253
PUT
Labcorp
LH
$24.7B
| $569K | ﹤0.01% |
33
-43
| -57% | -$7.43K |
|
3254
CALL
Spire
SR
$4.87B
| $569K | ﹤0.01% |
89
+86
| +2,867% | +$5.24K |
|
|
ASAP
3255
PUT
DELISTED
Waitr Holdings Inc. Common Stock
ASAP
| $569K | ﹤0.01% |
102
+95
| +1,357% | +$6.11K |
|
3256
CALL
Sonoco
SON
$5.8B
| $568K | ﹤0.01% |
96
-26
| -21% | -$1.46K |
|
3257
PUT
Builders FirstSource
BLDR
$7.82B
| $567K | ﹤0.01% |
139
-19
| -12% | -$673 |
|
3258
CALL
Chefs' Warehouse
CHEF
$3.9B
| $567K | ﹤0.01% |
221
-156
| -41% | -$3.07K |
|
|
CIM
3259
CALL
Chimera Investment
CIM
$1.05B
| $567K | ﹤0.01% |
185
+128
| +225% | +$3.71K |
|
3260
8x8 Inc
EGHT
$262M
| $567K | ﹤0.01% |
16,463
+9,912
| +151% | +$213K |
|
|
GAN
3261
PUT
DELISTED
GAN Ltd
GAN
| $567K | ﹤0.01% |
280
+50
| +22% | +$838 |
|
|
ZEPP
3262
CALL
Zepp Health
ZEPP
$71.4M
| $567K | ﹤0.01% |
120
+108
| +900% | +$5.39K |
|
|
FOE
3263
CALL
DELISTED
Ferro Corporation
FOE
| $567K | ﹤0.01% |
388
-124
| -24% | -$1.72K |
|
3264
CALL
Actinium Pharmaceuticals
ATNM
$26.8M
| $566K | ﹤0.01% |
726
+697
| +2,403% | +$7.57K |
|
3265
PUT
Fortive
FTV
$19.2B
| $566K | ﹤0.01% |
202
-237
| -54% | -$12.2K |
|
3266
PUT
MannKind Corp
MNKD
$1.22B
| $566K | ﹤0.01% |
1,809
+1,006
| +125% | +$2.64K |
|
3267
PUT
Upwork
UPWK
$1.14B
| $566K | ﹤0.01% |
164
-318
| -66% | -$9.09K |
|
3268
PUT
Outfront Media
OUT
$5.68B
| $565K | ﹤0.01% |
294
+131
| +80% | +$2.21K |
|
|
CUK
3269
CALL
DELISTED
Carnival PLC
CUK
| $562K | ﹤0.01% |
300
+234
| +355% | +$3.63K |
|
|
CVGW
3270
CALL
DELISTED
Calavo Growers
CVGW
| $562K | ﹤0.01% |
+81
| New | +$5.71K |
|
3271
1-800-Flowers.com
FLWS
$245M
| $562K | ﹤0.01% |
21,617
+16,989
| +367% | +$413K |
|
3272
CALL
STAAR Surgical
STAA
$1.14B
| $562K | ﹤0.01% |
71
+22
| +45% | +$1.61K |
|
3273
United States 12 Month Oil Fund,
USL
$44.8M
| $562K | ﹤0.01% |
32,747
-28,223
| -46% | -$440K |
|
3274
PUT
American Homes 4 Rent
AMH
$12B
| $561K | ﹤0.01% |
187
+142
| +316% | +$4.17K |
|
|
DCH
3275
PUT
Dauch Corp
DCH
$1.32B
| $561K | ﹤0.01% |
673
-5
| -0.7% | -$38 |
|
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.