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 | |
|---|---|---|---|---|---|---|
476
Newmont
NEM
$102B
| $13.1M | 0.02% |
+218,976
| New | +$13.5M |
|
477
PUT
Lemonade
LMND
$4.87B
| $13.1M | 0.02% |
1,069
+799
| +296% | +$58.9K |
|
478
PUT
HCA Healthcare
HCA
$82.5B
| $13M | 0.02% |
793
+97
| +14% | +$14.2K |
|
479
PUT
Dollar General
DG
$26.5B
| $13M | 0.02% |
616
-270
| -30% | -$57.7K |
|
|
VMW
480
PUT
DELISTED
VMware, Inc
VMW
| $12.9M | 0.02% |
923
-138
| -13% | -$19.8K |
|
481
PUT
SLB Ltd
SLB
$71.3B
| $12.9M | 0.02% |
5,905
+977
| +20% | +$18.4K |
|
482
PUT
Boston Properties
BXP
$10.8B
| $12.9M | 0.02% |
1,360
+979
| +257% | +$87.5K |
|
483
PUT
Lennar Class B
LEN.B
$19.4B
| $12.9M | 0.02% |
1,774
+621
| +54% | +$36.8K |
|
|
ALXN
484
DELISTED
Alexion Pharmaceuticals
ALXN
| $12.8M | 0.02% |
82,137
+36,147
| +79% | +$4.64M |
|
|
DFS
485
CALL
DELISTED
Discover Financial Services
DFS
| $12.8M | 0.02% |
1,410
-145
| -9% | -$10.8K |
|
|
TYNS
486
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $12.7M | 0.02% |
2,090
-261
| -11% | -$1.59M |
|
|
WBA
487
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $12.7M | 0.02% |
3,190
-22
| -0.7% | -$852 |
|
|
X
488
CALL
DELISTED
US Steel
X
| $12.7M | 0.02% |
7,554
+2,590
| +52% | +$32.2K |
|
489
PUT
Caesars Entertainment
CZR
$6.1B
| $12.6M | 0.02% |
1,692
+1
| +0.1% | +$63 |
|
|
PARA
490
CALL
DELISTED
Paramount Global Class B
PARA
| $12.5M | 0.02% |
3,361
-610
| -15% | -$19.6K |
|
491
CALL
Li Auto
LI
$12B
| $12.5M | 0.02% |
4,342
+3,542
| +443% | +$97.1K |
|
|
492
Alphabet (Google) Class A
GOOGL
$4.17T
| $12.5M | 0.02% |
142,740
+136,140
| +2,063% | +$11.5M |
|
493
PUT
Prudential Financial
PRU
$41.3B
| $12.5M | 0.02% |
1,599
+260
| +19% | +$18.8K |
|
494
PUT
Capri Holdings
CPRI
$1.86B
| $12.4M | 0.02% |
2,959
+1,436
| +94% | +$44K |
|
495
CALL
Humana
HUM
$47.7B
| $12.4M | 0.02% |
302
+42
| +16% | +$17.5K |
|
496
CALL
Paycom
PAYC
$6.5B
| $12.3M | 0.02% |
272
+61
| +29% | +$24.3K |
|
497
PUT
Avis
CAR
$5.81B
| $12.2M | 0.02% |
3,279
-317
| -9% | -$11.1K |
|
|
ZEN
498
PUT
DELISTED
ZENDESK INC
ZEN
| $12.2M | 0.02% |
853
+122
| +17% | +$15.1K |
|
499
PUT
MetLife
MET
$60B
| $12.2M | 0.02% |
2,598
+94
| +4% | +$4.07K |
|
|
RDFN
500
PUT
DELISTED
Redfin
RDFN
| $12.2M | 0.02% |
1,775
+433
| +32% | +$23.1K |
|
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.