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 | |
|---|---|---|---|---|---|---|
401
CALL
Take-Two Interactive
TTWO
$40.1B
| $10.2M | 0.03% |
901
-534
| -37% | -$55K |
|
402
PUT
ConocoPhillips
COP
$161B
| $10.1M | 0.03% |
1,659
-1,078
| -39% | -$67.1K |
|
403
PUT
PG&E
PCG
$31.5B
| $10.1M | 0.03% |
4,410
-5,316
| -55% | -$107K |
|
404
PUT
MetLife
MET
$62B
| $10.1M | 0.03% |
2,025
-382
| -16% | -$18K |
|
405
PUT
Kohl's
KSS
$2.2B
| $10.1M | 0.03% |
2,114
+635
| +43% | +$38.3K |
|
406
PUT
Humana
HUM
$48.2B
| $10M | 0.03% |
378
+65
| +21% | +$16.5K |
|
407
CALL
Halliburton
HAL
$30.9B
| $9.99M | 0.03% |
4,395
+897
| +26% | +$23.3K |
|
408
CALL
Mercado Libre
MELI
$100B
| $9.97M | 0.03% |
163
+12
| +8% | +$6.68K |
|
409
PUT
Tilray
TLRY
$619M
| $9.92M | 0.03% |
213
-11
| -5% | -$5.26K |
|
410
CALL
Duke Energy
DUK
$93.7B
| $9.91M | 0.03% |
1,123
+326
| +41% | +$28.8K |
|
411
PUT
Vanguard FTSE Europe ETF
VGK
$31.1B
| $9.86M | 0.03% |
1,896
-481
| -20% | -$26.2K |
|
412
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$370M
| $9.81M | 0.03% |
906
+224
| +33% | +$24K |
|
413
CALL
Vertex Pharmaceuticals
VRTX
$138B
| $9.79M | 0.03% |
534
-129
| -19% | -$22.6K |
|
414
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$26.5B
| $9.75M | 0.03% |
275
+84
| +44% | +$29.4K |
|
415
CALL
Best Buy
BBY
$19B
| $9.75M | 0.03% |
1,398
+371
| +36% | +$25.9K |
|
416
CALL
Ulta Beauty
ULTA
$24.1B
| $9.75M | 0.03% |
281
-415
| -60% | -$143K |
|
417
CALL
AutoZone
AZO
$48.7B
| $9.68M | 0.03% |
88
-299
| -77% | -$315K |
|
418
CALL
Okta
OKTA
$29.8B
| $9.6M | 0.03% |
777
+53
| +7% | +$5.75K |
|
|
RTN
419
CALL
DELISTED
Raytheon Company
RTN
| $9.56M | 0.03% |
550
-353
| -39% | -$63.5K |
|
420
PUT
LyondellBasell Industries
LYB
$20.5B
| $9.49M | 0.03% |
1,102
+171
| +18% | +$14.6K |
|
421
Constellation Brands
STZ
$21.9B
| $9.45M | 0.03% |
47,994
+21,514
| +81% | +$4.2M |
|
422
JPMorgan Chase
JPM
$953B
| $9.41M | 0.03% |
84,205
+50,727
| +152% | +$5.59M |
|
423
CALL
Fidelity National Information Services
FIS
$21.6B
| $9.4M | 0.03% |
766
+17
| +2% | +$2K |
|
|
COUP
424
PUT
DELISTED
Coupa Software Incorporated
COUP
| $9.37M | 0.03% |
740
+406
| +122% | +$43.6K |
|
|
DISH
425
PUT
DELISTED
DISH Network Corp.
DISH
| $9.32M | 0.03% |
2,428
+615
| +34% | +$21.8K |
|
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.