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 | Miscellaneous | 97.26% |
| 2 | Technology | 0.76% |
| 3 | Consumer Discretionary | 0.58% |
| 4 | Communication Services | 0.34% |
| 5 | Healthcare | 0.32% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
76
CALL
Adobe
ADBE
$106B
| $69M | 0.15% |
2,092
-359
| -15% | -$106K |
|
77
PUT
Goldman Sachs
GS
$302B
| $68.7M | 0.15% |
2,987
+888
| +42% | +$193K |
|
78
PUT
UnitedHealth
UNH
$356B
| $68.3M | 0.15% |
2,325
+156
| +7% | +$40.8K |
|
79
CALL
Roku
ROKU
$23.1B
| $65.7M | 0.14% |
4,907
+173
| +4% | +$23.8K |
|
80
CALL
Costco
COST
$406B
| $65.2M | 0.14% |
2,217
-296
| -12% | -$88K |
|
81
CALL
Mastercard
MA
$507B
| $64.7M | 0.14% |
2,166
+332
| +18% | +$93.6K |
|
82
PUT
IBM
IBM
$221B
| $63.5M | 0.14% |
4,955
+915
| +23% | +$119K |
|
83
PUT
Qualcomm
QCOM
$180B
| $63M | 0.14% |
7,146
+3,121
| +78% | +$261K |
|
84
CALL
CVS Health
CVS
$124B
| $62.2M | 0.14% |
8,371
-1,146
| -12% | -$80.5K |
|
|
85
CALL
Biogen
BIIB
$32.6B
| $61.3M | 0.13% |
2,065
+640
| +45% | +$178K |
|
86
PUT
Baidu
BIDU
$33.7B
| $61.2M | 0.13% |
4,845
+1,250
| +35% | +$142K |
|
87
CALL
Chipotle Mexican Grill
CMG
$46.8B
| $60.3M | 0.13% |
36,000
+1,800
| +5% | +$28.9K |
|
88
PUT
Mercado Libre
MELI
$100B
| $59.6M | 0.13% |
1,042
-255
| -20% | -$141K |
|
89
CALL
Johnson & Johnson
JNJ
$663B
| $59.6M | 0.13% |
4,085
+1,237
| +43% | +$168K |
|
|
90
PUT
Costco
COST
$406B
| $59M | 0.13% |
2,009
-1,075
| -35% | -$319K |
|
91
PUT
Beyond Meat
BYND
$203M
| $58.3M | 0.13% |
257
+59
| +30% | +$164K |
|
92
PUT
McDonald's
MCD
$181B
| $57.4M | 0.13% |
2,903
+241
| +9% | +$47.8K |
|
93
PUT
Nike
NKE
$57B
| $56.2M | 0.12% |
5,552
+1,985
| +56% | +$187K |
|
94
PUT
Target
TGT
$74.7B
| $55.1M | 0.12% |
4,299
+1,559
| +57% | +$183K |
|
95
PUT
Citigroup
C
$231B
| $54.9M | 0.12% |
6,867
-991
| -13% | -$73.2K |
|
|
96
CALL
Qualcomm
QCOM
$180B
| $54.6M | 0.12% |
6,184
+119
| +2% | +$9.96K |
|
|
97
CALL
Citigroup
C
$231B
| $54.3M | 0.12% |
6,802
+2,264
| +50% | +$167K |
|
|
98
CALL
Baidu
BIDU
$33.7B
| $53.4M | 0.12% |
4,223
+809
| +24% | +$92K |
|
|
99
PUT
Biogen
BIIB
$32.6B
| $53M | 0.12% |
1,785
-1,013
| -36% | -$281K |
|
100
PUT
Amgen
AMGN
$236B
| $52.9M | 0.12% |
2,196
+152
| +7% | +$33.5K |
|
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 Miscellaneous at 97% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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.