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 | |
|---|---|---|---|---|---|---|
926
CALL
Tandem Diabetes Care
TNDM
$1.16B
| $3.52M | 0.01% |
555
-378
| -41% | -$19.9K |
|
|
CRC
927
CALL
DELISTED
California Resources Corporation
CRC
| $3.52M | 0.01% |
1,368
-222
| -14% | -$4.81K |
|
928
Progressive
PGR
$120B
| $3.52M | 0.01% |
48,786
+40,998
| +526% | +$2.81M |
|
929
PUT
Williams Companies
WMB
$92B
| $3.51M | 0.01% |
+1,222
| New | +$32.8K |
|
930
CALL
Exelon
EXC
$48.4B
| $3.49M | 0.01% |
976
-4
| -0.4% | -$136 |
|
931
CALL
Labcorp
LH
$23.9B
| $3.49M | 0.01% |
265
+94
| +55% | +$11.6K |
|
932
PUT
Alnylam Pharmaceuticals
ALNY
$35.9B
| $3.48M | 0.01% |
373
+27
| +8% | +$2.26K |
|
933
Restaurant Brands International
QSR
$25.1B
| $3.48M | 0.01% |
53,507
-3,775
| -7% | -$232K |
|
934
Intuit
INTU
$77B
| $3.48M | 0.01% |
+13,318
| New | +$3.08M |
|
|
LXFT
935
PUT
DELISTED
Luxoft Holding, Inc.
LXFT
| $3.48M | 0.01% |
593
+555
| +1,461% | +$31.5K |
|
936
PUT
Regions Financial
RF
$26.2B
| $3.48M | 0.01% |
2,459
+2,129
| +645% | +$32.6K |
|
937
United Airlines
UAL
$37.4B
| $3.47M | 0.01% |
+43,508
| New | +$3.67M |
|
938
Alexandria Real Estate Equities
ARE
$8.73B
| $3.47M | 0.01% |
+24,323
| New | +$3.2M |
|
939
CALL
Intercontinental Exchange
ICE
$81B
| $3.46M | 0.01% |
454
-245
| -35% | -$18.4K |
|
940
CALL
Ingredion
INGR
$6.32B
| $3.46M | 0.01% |
365
+320
| +711% | +$30.2K |
|
941
CALL
MGM Resorts International
MGM
$11.5B
| $3.45M | 0.01% |
1,344
-2,234
| -62% | -$61.3K |
|
942
PUT
Toro Company
TTC
$8.72B
| $3.44M | 0.01% |
500
+347
| +227% | +$22K |
|
|
WP
943
CALL
DELISTED
Worldpay, Inc.
WP
| $3.44M | 0.01% |
303
+287
| +1,794% | +$26K |
|
|
ZAYO
944
CALL
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $3.44M | 0.01% |
1,210
-76
| -6% | -$2.02K |
|
945
CALL
Jazz Pharmaceuticals
JAZZ
$16B
| $3.43M | 0.01% |
240
+161
| +204% | +$21K |
|
946
CALL
Howmet Aerospace
HWM
$115B
| $3.43M | 0.01% |
2,339
-1,770
| -43% | -$25.4K |
|
947
PUT
Live Nation Entertainment
LYV
$41B
| $3.42M | 0.01% |
539
+130
| +32% | +$7.37K |
|
948
JPMorgan Chase
JPM
$930B
| $3.39M | 0.01% |
+33,478
| New | +$3.45M |
|
949
CALL
Clorox
CLX
$11.3B
| $3.38M | 0.01% |
211
+71
| +51% | +$11K |
|
950
PUT
International Paper
IP
$20.1B
| $3.38M | 0.01% |
772
-297
| -28% | -$12.9K |
|
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.