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 | |
|---|---|---|---|---|---|---|
|
1626
TSMC
TSM
$2.09T
| $2.33M | ﹤0.01% |
21,334
-453,818
| -96% | -$43M |
|
|
BLUE
1627
DELISTED
bluebird bio
BLUE
| $2.32M | ﹤0.01% |
4,146
+1,649
| +66% | +$1.05M |
|
1628
VanEck Oil Services ETF
OIH
$2.06B
| $2.32M | ﹤0.01% |
15,072
-6,512
| -30% | -$826K |
|
1629
PUT
SS&C Technologies
SSNC
$17.8B
| $2.32M | ﹤0.01% |
319
-1,282
| -80% | -$85.9K |
|
1630
PUT
Fastenal
FAST
$54B
| $2.32M | ﹤0.01% |
950
+158
| +20% | +$3.72K |
|
1631
PUT
Bright Horizons
BFAM
$3.99B
| $2.32M | ﹤0.01% |
134
-22
| -14% | -$3.6K |
|
1632
Enphase Energy
ENPH
$4.84B
| $2.32M | ﹤0.01% |
13,202
-14,821
| -53% | -$1.88M |
|
1633
CALL
Regions Financial
RF
$26.3B
| $2.32M | ﹤0.01% |
1,437
-312
| -18% | -$4.51K |
|
1634
PUT
CoStar Group
CSGP
$11.3B
| $2.31M | ﹤0.01% |
250
+120
| +92% | +$10.5K |
|
1635
CALL
Valmont Industries
VMI
$9.44B
| $2.31M | ﹤0.01% |
132
+123
| +1,367% | +$19.2K |
|
1636
PUT
Ares Capital
ARCC
$13.5B
| $2.31M | ﹤0.01% |
1,366
+163
| +14% | +$2.53K |
|
1637
CALL
Revolve Group
RVLV
$1.79B
| $2.31M | ﹤0.01% |
740
+178
| +32% | +$3.96K |
|
1638
PUT
Dine Brands
DIN
$432M
| $2.3M | ﹤0.01% |
397
-103
| -21% | -$6.26K |
|
1639
CALL
CF Industries
CF
$19.2B
| $2.3M | ﹤0.01% |
594
-17
| -3% | -$561 |
|
1640
CALL
Guardant Health
GH
$19.5B
| $2.29M | ﹤0.01% |
178
-261
| -59% | -$30K |
|
1641
PUT
Moody's
MCO
$82.4B
| $2.29M | ﹤0.01% |
79
-110
| -58% | -$30.8K |
|
1642
CALL
Coty
COTY
$2.33B
| $2.29M | ﹤0.01% |
3,262
+1,548
| +90% | +$7.97K |
|
1643
PUT
Quest Diagnostics
DGX
$25.1B
| $2.29M | ﹤0.01% |
192
-136
| -41% | -$16.6K |
|
1644
CALL
Lamar Advertising Co
LAMR
$16.2B
| $2.29M | ﹤0.01% |
275
+261
| +1,864% | +$19.5K |
|
|
QIWI
1645
PUT
DELISTED
QIWI PLC
QIWI
| $2.29M | ﹤0.01% |
2,222
+686
| +45% | +$9.92K |
|
1646
PUT
Manulife Financial
MFC
$72.6B
| $2.29M | ﹤0.01% |
1,283
+633
| +97% | +$10.1K |
|
|
AAWW
1647
PUT
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
| $2.29M | ﹤0.01% |
419
+161
| +62% | +$9.46K |
|
1648
CALL
iShares Gold Trust
IAU
$63B
| $2.28M | ﹤0.01% |
630
+222
| +54% | +$7.95K |
|
1649
CALL
United Therapeutics
UTHR
$26.3B
| $2.28M | ﹤0.01% |
150
+47
| +46% | +$6.17K |
|
1650
CALL
Alliant Energy
LNT
$19.4B
| $2.27M | ﹤0.01% |
440
+398
| +948% | +$21.4K |
|
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.