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 | |
|---|---|---|---|---|---|---|
876
PUT
Bristol-Myers Squibb
BMY
$126B
| $4.44M | 0.01% |
9,287
+3,435
| +59% | +$197K |
|
877
CALL
Franco-Nevada
FNV
$41.3B
| $4.43M | 0.01% |
429
-330
| -43% | -$31.9K |
|
878
CALL
Live Nation Entertainment
LYV
$41B
| $4.43M | 0.01% |
620
-59
| -9% | -$4K |
|
879
PUT
Seagate
STX
$207B
| $4.43M | 0.01% |
744
-1,376
| -65% | -$79K |
|
880
iShares 1-3 Year Treasury Bond ETF
SHY
$25.3B
| $4.42M | 0.01% |
52,223
+51,525
| +7,382% | +$4.37M |
|
881
BP
BP
$113B
| $4.41M | 0.01% |
+116,978
| New | +$4.44M |
|
882
PUT
NetApp
NTAP
$32.3B
| $4.41M | 0.01% |
708
-53
| -7% | -$3.09K |
|
883
CALL
MGM Resorts International
MGM
$11.5B
| $4.4M | 0.01% |
1,322
-376
| -22% | -$11.5K |
|
884
CALL
Under Armour Class C
UA
$2.81B
| $4.4M | 0.01% |
2,111
+302
| +17% | +$5.32K |
|
|
BLUE
885
PUT
DELISTED
bluebird bio
BLUE
| $4.38M | 0.01% |
39
+17
| +77% | +$18.5K |
|
886
CALL
Ciena
CIEN
$57.7B
| $4.38M | 0.01% |
1,025
+137
| +15% | +$5.22K |
|
887
PUT
Etsy
ETSY
$7.68B
| $4.37M | 0.01% |
987
+503
| +104% | +$24K |
|
888
CALL
Enbridge
ENB
$123B
| $4.37M | 0.01% |
1,099
+609
| +124% | +$22.7K |
|
889
PUT
ON Semiconductor
ON
$35.1B
| $4.37M | 0.01% |
1,791
+1,065
| +147% | +$22.5K |
|
890
CALL
Keysight
KEYS
$55.6B
| $4.36M | 0.01% |
425
+316
| +290% | +$32.3K |
|
891
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$707M
| $4.35M | 0.01% |
1,057
+777
| +278% | +$26.9K |
|
892
Paycom
PAYC
$6.47B
| $4.35M | 0.01% |
+16,419
| New | +$3.89M |
|
893
CALL
Linde
LIN
$234B
| $4.34M | 0.01% |
204
-595
| -74% | -$120K |
|
894
CALL
Cognizant
CTSH
$20.3B
| $4.34M | 0.01% |
700
-733
| -51% | -$45.3K |
|
895
PUT
Texas Roadhouse
TXRH
$12.5B
| $4.33M | 0.01% |
769
+748
| +3,562% | +$41.1K |
|
896
PUT
Eaton
ETN
$161B
| $4.33M | 0.01% |
457
+285
| +166% | +$25.3K |
|
897
PUT
Monster Beverage
MNST
$91.5B
| $4.33M | 0.01% |
1,362
+792
| +139% | +$23.3K |
|
898
PUT
Zscaler
ZS
$22.6B
| $4.32M | 0.01% |
930
-24
| -3% | -$1.11K |
|
899
CALL
Envista
NVST
$4.26B
| $4.32M | 0.01% |
+1,458
| New | +$41.5K |
|
900
CALL
Howmet Aerospace
HWM
$115B
| $4.3M | 0.01% |
1,824
+301
| +20% | +$6.72K |
|
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.