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 | |
|---|---|---|---|---|---|---|
|
BNY
526
PUT
Bank of New York Mellon
BNY
$110B
| $11.6M | 0.02% |
2,723
-183
| -6% | -$7.03K |
|
527
CALL
Duke Energy
DUK
$99.7B
| $11.6M | 0.02% |
1,262
-70
| -5% | -$6.47K |
|
528
CALL
Enterprise Products Partners
EPD
$84.1B
| $11.5M | 0.01% |
5,847
+1,584
| +37% | +$29.5K |
|
529
CALL
ALPS REIT Dividend Dogs ETF
RDOG
$11.5M
| $11.4M | 0.01% |
4,397
+1,598
| +57% | +$61.3K |
|
|
JMIA
530
PUT
Jumia Technologies
JMIA
$744M
| $11.4M | 0.01% |
2,818
+1,976
| +235% | +$48.2K |
|
531
PUT
PNC Financial Services
PNC
$101B
| $11.4M | 0.01% |
762
+242
| +47% | +$30.9K |
|
532
CALL
DexCom
DXCM
$27.6B
| $11.3M | 0.01% |
1,224
+656
| +115% | +$58.6K |
|
533
CALL
American International
AIG
$41.5B
| $11.3M | 0.01% |
2,976
+216
| +8% | +$7.61K |
|
534
Biogen
BIIB
$29.2B
| $11.2M | 0.01% |
+45,903
| New | +$11.8M |
|
535
VanEck Gold Miners ETF
GDX
$23.4B
| $11.2M | 0.01% |
310,062
+51,829
| +20% | +$1.94M |
|
536
CALL
Allstate
ALL
$64.8B
| $11.2M | 0.01% |
1,015
+589
| +138% | +$57.9K |
|
537
AbbVie
ABBV
$448B
| $11.2M | 0.01% |
104,098
+103,998
| +103,998% | +$9.99M |
|
|
BBBY
538
CALL
DELISTED
Bed Bath & Beyond Inc
BBBY
| $11.1M | 0.01% |
6,257
+1,026
| +20% | +$21.3K |
|
539
Li Auto
LI
$12B
| $11.1M | 0.01% |
384,516
+274,237
| +249% | +$7.52M |
|
540
PUT
Vanguard Dividend Appreciation ETF
VIG
$110B
| $11.1M | 0.01% |
785
-782
| -50% | -$106K |
|
541
AstraZeneca
AZN
$263B
| $11.1M | 0.01% |
110,767
+68,455
| +162% | +$7.25M |
|
|
RDS.A
542
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $11M | 0.01% |
3,199
-486
| -13% | -$15.2K |
|
543
CALL
QuantumScape Corp
QS
$3.61B
| $11M | 0.01% |
1,304
+995
| +322% | +$36.4K |
|
|
ALXN
544
CALL
DELISTED
Alexion Pharmaceuticals
ALXN
| $11M | 0.01% |
+704
| New | +$90.5K |
|
545
PUT
Microchip Technology
MCHP
$46.2B
| $11M | 0.01% |
1,586
-1,078
| -40% | -$67.1K |
|
|
TIF
546
PUT
DELISTED
Tiffany & Co.
TIF
| $10.9M | 0.01% |
831
-1,542
| -65% | -$197K |
|
547
Delta Air Lines
DAL
$54.9B
| $10.9M | 0.01% |
270,816
+179,903
| +198% | +$6.54M |
|
548
PUT
CarMax
KMX
$8.15B
| $10.9M | 0.01% |
1,151
-282
| -20% | -$26.4K |
|
549
PUT
Kimberly-Clark
KMB
$36.1B
| $10.9M | 0.01% |
805
+605
| +303% | +$84.7K |
|
|
PXD
550
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $10.9M | 0.01% |
953
+669
| +236% | +$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.