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 | |
|---|---|---|---|---|---|---|
|
BIG
3026
CALL
DELISTED
Big Lots, Inc.
BIG
| $353K | ﹤0.01% |
93
+68
| +272% | +$2.22K |
|
3027
PUT
Lincoln Electric
LECO
$14.1B
| $352K | ﹤0.01% |
+42
| New | +$3.56K |
|
3028
PUT
Liberty Latin America Class C
LILAK
$1.55B
| $352K | ﹤0.01% |
213
+159
| +294% | +$2.48K |
|
|
LX
3029
LexinFintech Holdings
LX
$241M
| $352K | ﹤0.01% |
33,537
-16,307
| -33% | -$166K |
|
3030
PUT
Scorpio Tankers
STNG
$3.9B
| $352K | ﹤0.01% |
178
+177
| +17,700% | +$3.36K |
|
3031
CALL
Sibanye-Stillwater
SBSW
$6.05B
| $351K | ﹤0.01% |
852
+799
| +1,508% | +$3.02K |
|
|
PBCT
3032
DELISTED
People's United Financial Inc
PBCT
| $351K | ﹤0.01% |
21,381
-38,461
| -64% | -$641K |
|
|
WLH
3033
CALL
DELISTED
WILLIAM LYON HOMES
WLH
| $351K | ﹤0.01% |
229
+196
| +594% | +$2.7K |
|
3034
VirnetX Holding Corp
VHC
$51M
| $350K | ﹤0.01% |
2,769
+1,916
| +225% | +$199K |
|
3035
Warner Bros
WBD
$63.4B
| $350K | ﹤0.01% |
12,963
-840
| -6% | -$23.4K |
|
3036
PUT
Hain Celestial
HAIN
$46M
| $349K | ﹤0.01% |
151
+38
| +34% | +$732 |
|
3037
CALL
Champion Homes
SKY
$4.52B
| $349K | ﹤0.01% |
184
+179
| +3,580% | +$3.28K |
|
3038
PUT
STAG Industrial
STAG
$7.77B
| $349K | ﹤0.01% |
118
+95
| +413% | +$2.62K |
|
3039
PUT
Yum! Brands
YUM
$40.7B
| $349K | ﹤0.01% |
35
-74
| -68% | -$7.01K |
|
|
PENG
3040
PUT
Penguin Solutions Inc
PENG
$2.69B
| $349K | ﹤0.01% |
364
+340
| +1,417% | +$4.4K |
|
3041
CALL
Compass Minerals
CMP
$1.25B
| $347K | ﹤0.01% |
64
+24
| +60% | +$1.22K |
|
3042
PUT
Sysco
SYY
$40.2B
| $347K | ﹤0.01% |
52
-191
| -79% | -$12.4K |
|
|
ATRS
3043
PUT
DELISTED
Antares Pharma, Inc.
ATRS
| $347K | ﹤0.01% |
1,147
+335
| +41% | +$1.09K |
|
|
TLRD
3044
DELISTED
Tailored Brands, Inc.
TLRD
| $347K | ﹤0.01% |
+44,329
| New | +$525K |
|
3045
CALL
Coca-Cola Europacific Partners
CCEP
$48.1B
| $346K | ﹤0.01% |
67
-240
| -78% | -$11.4K |
|
3046
PUT
Yum China
YUMC
$15.3B
| $345K | ﹤0.01% |
77
-232
| -75% | -$9.14K |
|
3047
PUT
Healthpeak Properties
DOC
$15.5B
| $344K | ﹤0.01% |
110
-72
| -40% | -$2.19K |
|
|
DVAX
3048
DELISTED
Dynavax Technologies
DVAX
| $344K | ﹤0.01% |
47,122
-36,683
| -44% | -$359K |
|
3049
CALL
Globe Life
GL
$13.5B
| $344K | ﹤0.01% |
42
-57
| -58% | -$4.66K |
|
|
CARB
3050
PUT
DELISTED
Carbonite Inc
CARB
| $344K | ﹤0.01% |
139
+120
| +632% | +$3.08K |
|
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.