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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
PPLC
376
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $13.4M | 0.03% |
3,803
+501
| +15% | +$21.2K |
|
377
PUT
Air Products & Chemicals
APD
$66.1B
| $13.4M | 0.03% |
570
+300
| +111% | +$67.7K |
|
378
PUT
Ventas
VTR
$47.2B
| $13.4M | 0.03% |
2,316
+787
| +51% | +$49.4K |
|
379
CALL
American International
AIG
$41.5B
| $13.3M | 0.03% |
2,598
-66
| -2% | -$3.5K |
|
380
Qualcomm
QCOM
$185B
| $13.2M | 0.03% |
+150,028
| New | +$12.6M |
|
381
CALL
Duke Energy
DUK
$99.7B
| $13.2M | 0.03% |
1,451
+451
| +45% | +$41.3K |
|
382
PUT
Twilio
TWLO
$27.8B
| $13.2M | 0.03% |
1,341
-777
| -37% | -$79.4K |
|
383
PUT
Wells Fargo
WFC
$262B
| $13.1M | 0.03% |
2,444
-819
| -25% | -$42.9K |
|
384
PUT
Invesco S&P SmallCap Low Volatility ETF
XSLV
$247M
| $13.1M | 0.03% |
5,727
+3,197
| +126% | +$160K |
|
385
PUT
KLA
KLAC
$280B
| $13.1M | 0.03% |
7,350
-2,560
| -26% | -$42.9K |
|
386
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $13.1M | 0.03% |
598
-202
| -25% | -$40.9K |
|
387
CALL
Ross Stores
ROST
$76.4B
| $13M | 0.03% |
1,118
+892
| +395% | +$100K |
|
388
CALL
Yum! Brands
YUM
$40.7B
| $13M | 0.03% |
1,289
+268
| +26% | +$27.8K |
|
389
PUT
D.R. Horton
DHI
$40.4B
| $12.9M | 0.03% |
2,445
+1,324
| +118% | +$70.7K |
|
390
CALL
Danaher
DHR
$127B
| $12.9M | 0.03% |
948
+419
| +79% | +$52.9K |
|
391
CALL
Skyworks Solutions
SWKS
$9.5B
| $12.9M | 0.03% |
1,066
+281
| +36% | +$27.6K |
|
392
CALL
PG&E
PCG
$39.9B
| $12.8M | 0.03% |
11,742
+4,888
| +71% | +$41.9K |
|
393
CALL
Sea Limited
SE
$64.2B
| $12.7M | 0.03% |
3,158
+1,793
| +131% | +$60.4K |
|
394
PUT
Lennar Class B
LEN.B
$19.4B
| $12.7M | 0.03% |
2,389
+1,699
| +246% | +$75.5K |
|
395
PUT
Best Buy
BBY
$18.4B
| $12.6M | 0.03% |
1,431
+177
| +14% | +$13.5K |
|
|
CGC
396
PUT
Canopy Growth
CGC
$384M
| $12.5M | 0.03% |
591
+271
| +85% | +$53.8K |
|
|
ALXN
397
PUT
DELISTED
Alexion Pharmaceuticals
ALXN
| $12.4M | 0.03% |
1,149
-123
| -10% | -$13.2K |
|
398
CALL
Mondelez International
MDLZ
$78.1B
| $12.4M | 0.03% |
2,244
+1,429
| +175% | +$76.4K |
|
|
ZEN
399
CALL
DELISTED
ZENDESK INC
ZEN
| $12.3M | 0.03% |
1,602
+317
| +25% | +$23.2K |
|
400
CALL
Spotify
SPOT
$97.5B
| $12.2M | 0.03% |
818
+158
| +24% | +$21.7K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.