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 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
901
PUT
Viatris
VTRS
$20.1B
| $3.52M | 0.01% |
1,850
+41
| +2% | +$907 |
|
902
CALL
Galicia Financial Group
GGAL
$7.92B
| $3.52M | 0.01% |
992
+421
| +74% | +$11.3K |
|
903
CALL
GoDaddy
GDDY
$12.3B
| $3.51M | 0.01% |
501
+162
| +48% | +$12.2K |
|
904
Qorvo
QRVO
$7.63B
| $3.51M | 0.01% |
52,762
+50,531
| +2,265% | +$3.51M |
|
905
CALL
Ball Corp
BALL
$17B
| $3.51M | 0.01% |
502
+337
| +204% | +$20.9K |
|
906
CALL
Restaurant Brands International
QSR
$25.1B
| $3.51M | 0.01% |
505
+280
| +124% | +$18.7K |
|
907
CALL
MSCI
MSCI
$40B
| $3.51M | 0.01% |
147
+114
| +345% | +$25.6K |
|
908
PUT
First Solar
FSLR
$21.8B
| $3.51M | 0.01% |
534
+221
| +71% | +$13.3K |
|
909
CALL
Apollo Global Management
APO
$70.7B
| $3.5M | 0.01% |
1,022
+203
| +25% | +$6.45K |
|
910
CALL
Yum China
YUMC
$14.9B
| $3.49M | 0.01% |
756
-56
| -7% | -$2.43K |
|
|
MDSO
911
CALL
DELISTED
Medidata Solutions, Inc.
MDSO
| $3.48M | 0.01% |
385
+355
| +1,183% | +$31.2K |
|
912
PUT
Incyte
INCY
$23.5B
| $3.48M | 0.01% |
410
+330
| +413% | +$26.5K |
|
913
CALL
McKesson
MCK
$98.5B
| $3.48M | 0.01% |
259
+16
| +7% | +$2K |
|
914
PUT
Labcorp
LH
$24.3B
| $3.48M | 0.01% |
234
-225
| -49% | -$31.4K |
|
915
CALL
Global Payments
GPN
$22.1B
| $3.47M | 0.01% |
217
+200
| +1,176% | +$29.7K |
|
916
CALL
ProShares Ultra S&P500
SSO
$7.82B
| $3.47M | 0.01% |
4,336
+1,392
| +47% | +$21.2K |
|
917
CALL
AerCap
AER
$23.9B
| $3.46M | 0.01% |
665
+490
| +280% | +$24K |
|
918
PUT
TAL Education Group
TAL
$5.71B
| $3.46M | 0.01% |
907
-449
| -33% | -$16.2K |
|
919
PUT
Assured Guaranty
AGO
$3.78B
| $3.45M | 0.01% |
819
-297
| -27% | -$13.1K |
|
920
CALL
Neurocrine Biosciences
NBIX
$17.7B
| $3.44M | 0.01% |
408
+40
| +11% | +$3.28K |
|
921
PUT
Phillips 66
PSX
$82.9B
| $3.44M | 0.01% |
368
+106
| +40% | +$9.51K |
|
922
PUT
Dropbox
DBX
$6.81B
| $3.43M | 0.01% |
1,371
+715
| +109% | +$16.5K |
|
923
PUT
Bath & Body Works
BBWI
$4.01B
| $3.43M | 0.01% |
1,627
-111
| -6% | -$2.19K |
|
924
CALL
ASML
ASML
$675B
| $3.43M | 0.01% |
165
-97
| -37% | -$19.3K |
|
925
IBM
IBM
$202B
| $3.42M | 0.01% |
+25,977
| New | +$3.41M |
|
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 1,301 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 Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- 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 1,301 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.