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 | |
|---|---|---|---|---|---|---|
501
PUT
Colgate-Palmolive
CL
$73.3B
| $9.08M | 0.02% |
1,319
+677
| +105% | +$46.2K |
|
502
CALL
Bausch Health
BHC
$1.7B
| $9.06M | 0.02% |
3,027
+1,706
| +129% | +$44.3K |
|
503
PUT
Madison Square Garden
MSGS
$9.56B
| $9.03M | 0.02% |
430
-87
| -17% | -$17.1K |
|
504
CALL
ProShares Ultra S&P500
SSO
$8.02B
| $9.02M | 0.02% |
6,184
+2,016
| +48% | +$34.7K |
|
505
PUT
Crown Holdings
CCK
$13B
| $9.02M | 0.02% |
1,243
+860
| +225% | +$61.3K |
|
506
CALL
Zoetis
ZTS
$31.1B
| $9.01M | 0.02% |
681
+434
| +176% | +$53.9K |
|
507
CALL
Kimberly-Clark
KMB
$36.1B
| $9.01M | 0.02% |
655
+25
| +4% | +$3.38K |
|
508
PUT
Centene
CNC
$32.5B
| $8.96M | 0.02% |
1,425
-1,211
| -46% | -$65.7K |
|
509
Gilead Sciences
GILD
$162B
| $8.93M | 0.02% |
137,397
+66,439
| +94% | +$4.33M |
|
510
PUT
Ubiquiti
UI
$32.5B
| $8.88M | 0.02% |
470
+417
| +787% | +$67.3K |
|
|
DISH
511
PUT
DELISTED
DISH Network Corp.
DISH
| $8.87M | 0.02% |
2,500
-1,058
| -30% | -$36.6K |
|
512
United States Natural Gas Fund
UNG
$472M
| $8.86M | 0.02% |
+131,438
| New | +$10.2M |
|
|
DISCK
513
PUT
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $8.8M | 0.02% |
2,743
+1,480
| +117% | +$41.5K |
|
514
PUT
Capri Holdings
CPRI
$1.86B
| $8.79M | 0.02% |
2,305
+351
| +18% | +$12.1K |
|
515
CALL
APA Corp
APA
$12.8B
| $8.79M | 0.02% |
3,434
+1,625
| +90% | +$36.8K |
|
516
PUT
Crown Castle
CCI
$33.8B
| $8.74M | 0.02% |
615
+153
| +33% | +$20.9K |
|
517
PUT
Estee Lauder
EL
$29.9B
| $8.71M | 0.02% |
422
+112
| +36% | +$21.8K |
|
518
CALL
CME Group
CME
$90.1B
| $8.71M | 0.02% |
434
-347
| -44% | -$71.2K |
|
519
PUT
IPG Photonics
IPGP
$4.15B
| $8.71M | 0.02% |
601
+235
| +64% | +$32.7K |
|
520
PUT
Prudential Financial
PRU
$41.3B
| $8.66M | 0.02% |
924
+250
| +37% | +$23K |
|
521
PUT
Match Group
MTCH
$8.87B
| $8.59M | 0.02% |
1,046
+334
| +47% | +$24.3K |
|
522
CALL
Halliburton
HAL
$27.6B
| $8.58M | 0.02% |
3,505
+1,032
| +42% | +$21.8K |
|
523
PUT
CrowdStrike
CRWD
$192B
| $8.56M | 0.02% |
6,868
+4,304
| +168% | +$56.5K |
|
524
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $8.56M | 0.02% |
228
-125
| -35% | -$45.2K |
|
525
PUT
Teva Pharmaceuticals
TEVA
$35.1B
| $8.53M | 0.02% |
8,706
+400
| +5% | +$3.57K |
|
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.