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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
76
CALL
UnitedHealth
UNH
$394B
| $59.8M | 0.17% |
2,417
+619
| +34% | +$158K |
|
77
CALL
Caterpillar
CAT
$415B
| $59.7M | 0.17% |
4,403
+1,040
| +31% | +$138K |
|
78
CALL
JPMorgan Chase
JPM
$925B
| $59.2M | 0.16% |
5,909
-82
| -1% | -$8.45K |
|
79
PUT
ExxonMobil
XOM
$636B
| $58.2M | 0.16% |
7,197
+2,666
| +59% | +$203K |
|
|
80
Alphabet (Google) Class C
GOOG
$4.23T
| $57.8M | 0.16% |
984,700
-604,440
| -38% | -$33.9M |
|
81
PUT
Intuitive Surgical
ISRG
$122B
| $57.2M | 0.16% |
3,006
-1,227
| -29% | -$218K |
|
82
CALL
Micron Technology
MU
$1.1T
| $57M | 0.16% |
13,784
-5,574
| -29% | -$215K |
|
|
83
PUT
JPMorgan Chase
JPM
$925B
| $56.9M | 0.16% |
5,718
+615
| +12% | +$63.4K |
|
84
PUT
FedEx
FDX
$76.2B
| $55.4M | 0.15% |
3,054
+1,189
| +64% | +$210K |
|
85
CALL
Qualcomm
QCOM
$187B
| $54.9M | 0.15% |
9,635
+3,567
| +59% | +$193K |
|
|
86
CALL
ExxonMobil
XOM
$636B
| $54.9M | 0.15% |
6,797
+9
| +0.1% | +$686 |
|
87
CALL
Nike
NKE
$62.5B
| $54.8M | 0.15% |
6,511
+1,547
| +31% | +$128K |
|
88
PUT
Home Depot
HD
$332B
| $54.2M | 0.15% |
2,826
-92
| -3% | -$16.9K |
|
|
XYZ
89
PUT
Block Inc
XYZ
$46.3B
| $53.3M | 0.15% |
7,114
-242
| -3% | -$17.5K |
|
90
CALL
Bristol-Myers Squibb
BMY
$125B
| $51.5M | 0.14% |
10,802
+6,348
| +143% | +$316K |
|
91
CALL
Costco
COST
$409B
| $51M | 0.14% |
2,106
+162
| +8% | +$35.4K |
|
|
CELG
92
CALL
DELISTED
Celgene Corp
CELG
| $50.8M | 0.14% |
5,381
+322
| +6% | +$28.2K |
|
|
XYZ
93
CALL
Block Inc
XYZ
$46.3B
| $50M | 0.14% |
6,668
-484
| -7% | -$35.1K |
|
94
CALL
Bank of America
BAC
$433B
| $49.1M | 0.14% |
+17,799
| New | +$503K |
|
95
PUT
Mercado Libre
MELI
$91.6B
| $49M | 0.14% |
966
+819
| +557% | +$327K |
|
96
CALL
Electronic Arts
EA
$52.4B
| $48.5M | 0.14% |
4,776
+1,888
| +65% | +$179K |
|
|
97
PUT
Costco
COST
$409B
| $47.1M | 0.13% |
1,944
-795
| -29% | -$174K |
|
98
CALL
Advanced Micro Devices
AMD
$905B
| $47M | 0.13% |
18,425
-3,073
| -14% | -$69.8K |
|
99
CALL
Booking.com
BKNG
$139B
| $46.8M | 0.13% |
6,700
-6,825
| -50% | -$487K |
|
100
PUT
CVS Health
CVS
$139B
| $46.4M | 0.13% |
8,608
+6,507
| +310% | +$402K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.