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 | |
|---|---|---|---|---|---|---|
626
PUT
Marathon Petroleum
MPC
$92.2B
| $9.19M | 0.01% |
2,222
-886
| -29% | -$31.8K |
|
627
CALL
Seagate
STX
$205B
| $9.17M | 0.01% |
1,475
+54
| +4% | +$3.04K |
|
628
CALL
Advance Auto Parts
AAP
$3.35B
| $9.15M | 0.01% |
581
-25
| -4% | -$3.86K |
|
629
CALL
ConocoPhillips
COP
$145B
| $9.12M | 0.01% |
2,281
-1,197
| -34% | -$44.1K |
|
630
CALL
Canadian Solar
CSIQ
$1.05B
| $9.12M | 0.01% |
1,779
+670
| +60% | +$27.5K |
|
|
AMWD
631
CALL
DELISTED
American Woodmark
AMWD
| $9.06M | 0.01% |
965
+762
| +375% | +$69.3K |
|
632
Electronic Arts
EA
$52.4B
| $9.05M | 0.01% |
63,032
+23,317
| +59% | +$3.01M |
|
633
PUT
Boston Scientific
BSX
$63.9B
| $9.05M | 0.01% |
2,517
-725
| -22% | -$26.1K |
|
634
CALL
AutoZone
AZO
$48.5B
| $9.01M | 0.01% |
76
-16
| -17% | -$18.5K |
|
635
CALL
Rocket Companies
RKT
$38B
| $9.01M | 0.01% |
4,454
-2,347
| -35% | -$49.5K |
|
636
Shopify
SHOP
$154B
| $8.98M | 0.01% |
79,380
-47,980
| -38% | -$5.04M |
|
637
CALL
NetEase
NTES
$77.6B
| $8.98M | 0.01% |
938
+88
| +10% | +$7.9K |
|
638
PUT
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.5M
| $8.92M | 0.01% |
+3,977
| New | +$397K |
|
639
CALL
Ciena
CIEN
$56.2B
| $8.88M | 0.01% |
1,680
+636
| +61% | +$28.3K |
|
640
PUT
HDFC Bank
HDB
$119B
| $8.86M | 0.01% |
2,452
-984
| -29% | -$31.4K |
|
641
PUT
iQIYI
IQ
$1.2B
| $8.85M | 0.01% |
5,065
+1,331
| +36% | +$30K |
|
642
CALL
Blackrock
BLK
$164B
| $8.8M | 0.01% |
122
+15
| +14% | +$9.95K |
|
643
CALL
RH
RH
$3.31B
| $8.77M | 0.01% |
196
-378
| -66% | -$156K |
|
|
NVTA
644
PUT
DELISTED
Invitae Corporation
NVTA
| $8.74M | 0.01% |
2,091
+482
| +30% | +$23K |
|
645
CALL
Trip.com Group
TCOM
$26.8B
| $8.73M | 0.01% |
2,589
+324
| +14% | +$10.6K |
|
646
PUT
Colgate-Palmolive
CL
$73.3B
| $8.72M | 0.01% |
1,020
-417
| -29% | -$34.5K |
|
647
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $8.68M | 0.01% |
1,863
-1,540
| -45% | -$36.5K |
|
648
CALL
Live Nation Entertainment
LYV
$41.4B
| $8.68M | 0.01% |
1,181
+360
| +44% | +$22.7K |
|
649
PUT
PG&E
PCG
$39.9B
| $8.66M | 0.01% |
6,949
-2,021
| -23% | -$22.9K |
|
650
PUT
Kroger
KR
$35.3B
| $8.66M | 0.01% |
2,726
-577
| -17% | -$18.7K |
|
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.