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 |
SPDR Gold Trust
GLD
|
+$31.6M |
| 2 |
iShares Silver Trust
SLV
|
+$28.1M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.1M |
| 4 |
JPMorgan Chase
JPM
|
+$24.5M |
| 5 |
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
|
+$24M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$51.6M |
| 2 |
Amazon
AMZN
|
+$47.4M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$44.7M |
| 4 |
Netflix
NFLX
|
+$38.3M |
| 5 |
NVIDIA
NVDA
|
+$31.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Healthcare | 0.33% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.16% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
501
PUT
SLB Ltd
SLB
$71.3B
| $7.75M | 0.01% |
5,746
+2,237
| +64% | +$64.7K |
|
502
Direxion Daily S&P 500 Bear 3x ETF
SPXS
$320M
| $7.71M | 0.01% |
4,837
+4,487
| +1,282% | +$6.66M |
|
503
Invesco DB US Dollar Index Bullish Fund
UUP
$432M
| $7.7M | 0.01% |
287,177
+221,618
| +338% | +$5.9M |
|
504
PUT
Alnylam Pharmaceuticals
ALNY
$35.6B
| $7.7M | 0.01% |
707
-244
| -26% | -$28.2K |
|
505
CALL
T-Mobile US
TMUS
$207B
| $7.69M | 0.01% |
917
-277
| -23% | -$23.4K |
|
|
SPLK
506
CALL
DELISTED
Splunk Inc
SPLK
| $7.67M | 0.01% |
608
-1,368
| -69% | -$201K |
|
507
Invesco QQQ Trust
QQQ
$469B
| $7.67M | 0.01% |
40,260
-98,834
| -71% | -$20.9M |
|
508
PUT
Southwest Airlines
LUV
$23.3B
| $7.66M | 0.01% |
2,151
+1,604
| +293% | +$79.5K |
|
509
PUT
Vanguard FTSE Europe ETF
VGK
$30.2B
| $7.66M | 0.01% |
2,152
-126
| -6% | -$6.67K |
|
510
CALL
Wayfair
W
$11.1B
| $7.64M | 0.01% |
1,430
+303
| +27% | +$23.2K |
|
511
iShares China Large-Cap ETF
FXI
$4.29B
| $7.62M | 0.01% |
+202,924
| New | +$8.26M |
|
512
CALL
Dominion Energy
D
$62.5B
| $7.6M | 0.01% |
1,053
+311
| +42% | +$25.4K |
|
513
PUT
Dollar Tree
DLTR
$23.5B
| $7.6M | 0.01% |
1,034
-252
| -20% | -$21.5K |
|
514
PUT
Kroger
KR
$35.3B
| $7.59M | 0.01% |
2,520
+604
| +32% | +$17.7K |
|
515
CALL
Marvell Technology
MRVL
$189B
| $7.56M | 0.01% |
3,342
+1,374
| +70% | +$32.9K |
|
516
PUT
iShares Convertible Bond ETF
ICVT
$7.4B
| $7.55M | 0.01% |
3,240
+2,740
| +548% | +$169K |
|
517
CALL
Atlassian
TEAM
$21.7B
| $7.49M | 0.01% |
546
+195
| +56% | +$27.3K |
|
518
CALL
Automatic Data Processing
ADP
$97.2B
| $7.49M | 0.01% |
548
+72
| +15% | +$11.6K |
|
519
PUT
Mondelez International
MDLZ
$78.1B
| $7.45M | 0.01% |
1,487
+174
| +13% | +$9.43K |
|
520
CALL
Kraft Heinz
KHC
$30.8B
| $7.43M | 0.01% |
3,002
+1,479
| +97% | +$40.6K |
|
521
General Motors
GM
$74.1B
| $7.42M | 0.01% |
357,327
+271,085
| +314% | +$8.28M |
|
|
AYX
522
PUT
DELISTED
Alteryx Inc
AYX
| $7.4M | 0.01% |
778
+430
| +124% | +$53.4K |
|
523
PUT
Rio Tinto
RIO
$150B
| $7.37M | 0.01% |
1,617
+669
| +71% | +$34.3K |
|
524
PUT
Crown Castle
CCI
$33.8B
| $7.29M | 0.01% |
505
-110
| -18% | -$16.4K |
|
525
PUT
Molina Healthcare
MOH
$11.6B
| $7.29M | 0.01% |
522
+194
| +59% | +$26K |
|
Similar funds
Simplex Trading's Q1 2020 Portfolio in Review
As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
- Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
- Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
- Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
- Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.
Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.