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 | |
|---|---|---|---|---|---|---|
|
WBA
251
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $22.6M | 0.05% |
3,830
+785
| +26% | +$45.2K |
|
252
CALL
Target
TGT
$62.8B
| $22.5M | 0.05% |
1,757
-621
| -26% | -$72.9K |
|
|
JJT
253
CALL
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $22.2M | 0.05% |
13,644
-4,320
| -24% | -$186K |
|
254
PUT
Domino's
DPZ
$10.7B
| $21.9M | 0.05% |
744
+50
| +7% | +$13.8K |
|
255
PUT
Electronic Arts
EA
$52.4B
| $21.8M | 0.05% |
2,030
+335
| +20% | +$33.3K |
|
256
CALL
Accenture
ACN
$85.8B
| $21.8M | 0.05% |
1,034
+177
| +21% | +$34.5K |
|
|
PXD
257
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $21.8M | 0.05% |
1,437
+796
| +124% | +$106K |
|
258
PUT
Western Digital
WDC
$193B
| $21.6M | 0.05% |
4,506
-3,306
| -42% | -$138K |
|
259
CALL
Dollar General
DG
$26.8B
| $21.5M | 0.05% |
1,378
+731
| +113% | +$116K |
|
|
260
PUT
Dollar General
DG
$26.8B
| $21.4M | 0.05% |
1,371
+604
| +79% | +$95.8K |
|
261
CALL
Vanguard S&P 500 ETF
VOO
$982B
| $21.3M | 0.05% |
1,872
+928
| +98% | +$263K |
|
262
PUT
Universal Display
OLED
$3.84B
| $21.2M | 0.05% |
1,031
+152
| +17% | +$28.7K |
|
263
PUT
TSMC
TSM
$2.19T
| $21.2M | 0.05% |
3,646
+2,100
| +136% | +$111K |
|
|
LK
264
PUT
DELISTED
Luckin Coffee Inc. American Depositary Shares
LK
| $21.1M | 0.05% |
5,367
+4,492
| +513% | +$114K |
|
265
CALL
Lam Research
LRCX
$400B
| $20.8M | 0.05% |
7,100
-4,300
| -38% | -$114K |
|
266
CALL
EOG Resources
EOG
$77.3B
| $20.7M | 0.05% |
2,476
+910
| +58% | +$66.7K |
|
267
CALL
Coca-Cola
KO
$355B
| $20.6M | 0.05% |
3,729
+85
| +2% | +$4.57K |
|
268
PUT
Ferrari
RACE
$65.6B
| $20.4M | 0.04% |
1,235
+551
| +81% | +$89.1K |
|
|
269
Alibaba
BABA
$279B
| $20.4M | 0.04% |
96,177
-218,634
| -69% | -$41M |
|
270
PUT
Valero Energy
VLO
$92.7B
| $20.4M | 0.04% |
2,177
+278
| +15% | +$26.3K |
|
271
CALL
ProShares UltraShort Health Care
RXD
$3.35M
| $20.3M | 0.04% |
2,105
+631
| +43% | +$50K |
|
|
MDCO
272
PUT
DELISTED
Medicines Co
MDCO
| $20.2M | 0.04% |
2,377
-713
| -23% | -$47.5K |
|
|
RDS.A
273
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $20.1M | 0.04% |
3,377
+11
| +0.3% | +$642 |
|
274
PUT
Abbott
ABT
$175B
| $20M | 0.04% |
2,305
-444
| -16% | -$37.2K |
|
275
PUT
PepsiCo
PEP
$186B
| $19.9M | 0.04% |
1,459
-432
| -23% | -$58.8K |
|
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.