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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 97.48% |
| 2 | Technology | 0.51% |
| 3 | Communication Services | 0.5% |
| 4 | Healthcare | 0.37% |
| 5 | Industrials | 0.31% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1001
CALL
Copart
CPRT
$31.2B
| $3.05M | 0.01% |
1,632
+372
| +30% | +$6.38K |
|
1002
PUT
Knight Transportation
KNX
$11.7B
| $3.05M | 0.01% |
928
+65
| +8% | +$2.07K |
|
1003
CALL
Freeport-McMoran
FCX
$104B
| $3.04M | 0.01% |
2,621
+168
| +7% | +$1.96K |
|
|
BLUE
1004
PUT
DELISTED
bluebird bio
BLUE
| $3.04M | 0.01% |
18
| – | – |
|
1005
CALL
Wheaton Precious Metals
WPM
$70.4B
| $3.03M | 0.01% |
1,253
+486
| +63% | +$10.8K |
|
|
BPMC
1006
CALL
DELISTED
Blueprint Medicines
BPMC
| $3.03M | 0.01% |
321
+206
| +179% | +$17K |
|
|
S
1007
PUT
DELISTED
Sprint Corporation
S
| $3.03M | 0.01% |
4,608
+3,876
| +530% | +$24.5K |
|
1008
CALL
Wabtec
WAB
$47.8B
| $3.02M | 0.01% |
421
+106
| +34% | +$7.51K |
|
1009
Dollar General
DG
$29.4B
| $3.01M | 0.01% |
22,275
+16,403
| +279% | +$2.07M |
|
1010
PUT
RingCentral
RNG
$6.13B
| $3.01M | 0.01% |
262
+62
| +31% | +$7.15K |
|
1011
CALL
Cars.com
CARS
$628M
| $3M | 0.01% |
1,521
+1,247
| +455% | +$26.7K |
|
|
RSX
1012
DELISTED
VanEck Russia ETF
RSX
| $2.99M | 0.01% |
+126,595
| New | +$2.77M |
|
1013
CALL
LPL Financial
LPLA
$28.3B
| $2.98M | 0.01% |
366
+253
| +224% | +$20K |
|
1014
CALL
Boston Beer
SAM
$1.74B
| $2.98M | 0.01% |
79
+37
| +88% | +$11.7K |
|
1015
PUT
Targa Resources
TRGP
$62.2B
| $2.98M | 0.01% |
759
+353
| +87% | +$14K |
|
1016
Zoom
ZM
$29.6B
| $2.98M | 0.01% |
+33,522
| New | +$2.76M |
|
1017
CALL
Equinix
EQIX
$102B
| $2.98M | 0.01% |
59
-36
| -38% | -$17.3K |
|
1018
CALL
Zscaler
ZS
$27.7B
| $2.96M | 0.01% |
387
-139
| -26% | -$9.9K |
|
1019
CALL
Northern Trust
NTRS
$34.1B
| $2.96M | 0.01% |
329
+183
| +125% | +$16.9K |
|
1020
PUT
TJX Companies
TJX
$145B
| $2.95M | 0.01% |
558
-446
| -44% | -$23.7K |
|
1021
PUT
Canadian Solar
CSIQ
$898M
| $2.95M | 0.01% |
1,351
-86
| -6% | -$1.7K |
|
1022
PUT
Exelon
EXC
$45B
| $2.94M | 0.01% |
861
-19
| -2% | -$671 |
|
|
VIAB
1023
CALL
DELISTED
Viacom Inc. Class B
VIAB
| $2.94M | 0.01% |
984
-436
| -31% | -$12.7K |
|
|
GOOS
1024
PUT
Canada Goose Holdings
GOOS
$795M
| $2.92M | 0.01% |
753
-274
| -27% | -$12.3K |
|
1025
PUT
ScottsMiracle-Gro
SMG
$3.46B
| $2.92M | 0.01% |
296
+198
| +202% | +$17.6K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,300 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Miscellaneous at 97% of assets, up from 97% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,300 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.