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 | |
|---|---|---|---|---|---|---|
426
Gilead Sciences
GILD
$162B
| $15.5M | 0.02% |
+265,388
| New | +$16M |
|
|
X
427
PUT
DELISTED
US Steel
X
| $15.4M | 0.02% |
9,204
+5,183
| +129% | +$64.4K |
|
428
CALL
Capri Holdings
CPRI
$1.86B
| $15.3M | 0.02% |
3,645
+1,505
| +70% | +$46.1K |
|
429
CSX Corp
CSX
$92.8B
| $15.3M | 0.02% |
+505,785
| New | +$14.5M |
|
430
CALL
Dow Inc
DOW
$22.5B
| $15.3M | 0.02% |
2,748
-41
| -1% | -$2.12K |
|
|
SCIU
431
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $15.2M | 0.02% |
3,686
+1,224
| +50% | +$5.06M |
|
432
CALL
GE Aerospace
GE
$354B
| $15.2M | 0.02% |
2,830
+488
| +21% | +$21.9K |
|
433
CALL
Strategy Inc
MSTR
$36.3B
| $15.2M | 0.02% |
+3,920
| New | +$91.5K |
|
|
XLNX
434
PUT
DELISTED
Xilinx Inc
XLNX
| $15.2M | 0.02% |
1,072
-176
| -14% | -$22.9K |
|
435
PUT
Aramark
ARMK
$14.9B
| $15.2M | 0.02% |
5,461
+877
| +19% | +$21K |
|
436
CALL
Invesco DB US Dollar Index Bullish Fund
UUP
$432M
| $15.1M | 0.02% |
6,261
-1,916
| -23% | -$47.6K |
|
437
CALL
Valero Energy
VLO
$92.3B
| $15.1M | 0.02% |
2,670
-376
| -12% | -$18.4K |
|
|
SPWR
438
CALL
DELISTED
SunPower Corporation Common Stock
SPWR
| $15M | 0.02% |
6,372
+4,525
| +245% | +$91.5K |
|
|
PXD
439
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $15M | 0.02% |
1,316
+794
| +152% | +$77.2K |
|
440
PUT
Sherwin-Williams
SHW
$78.9B
| $14.8M | 0.02% |
606
-51
| -8% | -$12.1K |
|
441
General Motors
GM
$74.1B
| $14.8M | 0.02% |
355,642
+140,942
| +66% | +$5.48M |
|
442
Broadcom
AVGO
$1.89T
| $14.7M | 0.02% |
336,410
+73,280
| +28% | +$2.86M |
|
443
CALL
Invesco S&P SmallCap Low Volatility ETF
XSLV
$247M
| $14.7M | 0.02% |
1,646
+232
| +16% | +$8.65K |
|
444
PUT
DexCom
DXCM
$27.6B
| $14.5M | 0.02% |
1,568
-172
| -10% | -$15.4K |
|
445
PUT
Clorox
CLX
$11.6B
| $14.5M | 0.02% |
716
-438
| -38% | -$90.6K |
|
446
CALL
Align Technology
ALGN
$12.4B
| $14.4M | 0.02% |
269
-15
| -5% | -$6.74K |
|
447
CALL
CRISPR Therapeutics
CRSP
$4.65B
| $14.3M | 0.02% |
935
+591
| +172% | +$69.9K |
|
448
CALL
Global Payments
GPN
$21.6B
| $14.2M | 0.02% |
661
+542
| +455% | +$101K |
|
449
PUT
Altria Group
MO
$121B
| $14.2M | 0.02% |
3,469
+74
| +2% | +$2.97K |
|
450
CALL
Copart
CPRT
$25.2B
| $14.2M | 0.02% |
4,460
+2,232
| +100% | +$65K |
|
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.