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 | |
|---|---|---|---|---|---|---|
1751
CALL
Lear
LEA
$7.19B
| $1.32M | ﹤0.01% |
97
+74
| +322% | +$10.8K |
|
|
UCTT
1752
PUT
Ultra Clean Holdings
UCTT
$4.16B
| $1.31M | ﹤0.01% |
1,270
-775
| -38% | -$8.32K |
|
1753
Check Point Software Technologies
CHKP
$13.3B
| $1.31M | ﹤0.01% |
10,385
-2,721
| -21% | -$316K |
|
|
ELLI
1754
PUT
DELISTED
Ellie Mae Inc
ELLI
| $1.31M | ﹤0.01% |
133
+1
| +0.8% | +$87 |
|
1755
PUT
Appian
APPN
$1.74B
| $1.31M | ﹤0.01% |
381
+220
| +137% | +$7.43K |
|
1756
CALL
Mohawk Industries
MHK
$6.9B
| $1.31M | ﹤0.01% |
104
-125
| -55% | -$16.3K |
|
1757
Match Group
MTCH
$8.84B
| $1.31M | ﹤0.01% |
23,156
+7,106
| +44% | +$376K |
|
1758
PUT
HealthEquity
HQY
$7.91B
| $1.31M | ﹤0.01% |
177
-133
| -43% | -$9.35K |
|
|
WRK
1759
CALL
DELISTED
WestRock Company
WRK
| $1.31M | ﹤0.01% |
341
-689
| -67% | -$27K |
|
1760
PUT
Huazhu Hotels Group
HTHT
$12.4B
| $1.31M | ﹤0.01% |
310
+287
| +1,248% | +$9.81K |
|
1761
PUT
Weyerhaeuser
WY
$17.3B
| $1.31M | ﹤0.01% |
496
-22
| -4% | -$554 |
|
1762
PUT
Ally Financial
ALLY
$13.1B
| $1.3M | ﹤0.01% |
475
-355
| -43% | -$9.27K |
|
|
STAY
1763
DELISTED
Extended Stay America, Inc. Paired Share Unit
STAY
| $1.3M | ﹤0.01% |
72,750
+51,321
| +239% | +$892K |
|
1764
Consolidated Edison
ED
$41.6B
| $1.3M | ﹤0.01% |
15,330
+4,534
| +42% | +$362K |
|
1765
CALL
Revvity
RVTY
$12.3B
| $1.3M | ﹤0.01% |
135
+107
| +382% | +$9.64K |
|
1766
PUT
Canadian Pacific Kansas City
CP
$82B
| $1.3M | ﹤0.01% |
315
-665
| -68% | -$26.7K |
|
1767
PUT
Occidental Petroleum
OXY
$57B
| $1.3M | ﹤0.01% |
196
-556
| -74% | -$36.6K |
|
|
GBT
1768
PUT
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $1.3M | ﹤0.01% |
245
+132
| +117% | +$6.49K |
|
1769
CALL
Nasdaq
NDAQ
$51.5B
| $1.29M | ﹤0.01% |
444
+57
| +15% | +$1.62K |
|
1770
CALL
Children's Place
PLCE
$53.6M
| $1.29M | ﹤0.01% |
133
-68
| -34% | -$6.2K |
|
1771
CALL
Nutrien
NTR
$32.7B
| $1.29M | ﹤0.01% |
245
-97
| -28% | -$5.05K |
|
1772
CALL
Molina Healthcare
MOH
$10.3B
| $1.29M | ﹤0.01% |
91
-197
| -68% | -$26.6K |
|
|
PEGI
1773
CALL
DELISTED
Pattern Energy Group Inc. Class A
PEGI
| $1.29M | ﹤0.01% |
587
+269
| +85% | +$5.61K |
|
|
KFYP
1774
CALL
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $1.29M | ﹤0.01% |
310
-433
| -58% | -$10.8K |
|
|
EBIX
1775
PUT
DELISTED
Ebix Inc
EBIX
| $1.29M | ﹤0.01% |
261
-83
| -24% | -$4.38K |
|
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.