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 | |
|---|---|---|---|---|---|---|
1876
CALL
Delek US
DK
$3.87B
| $1.02M | ﹤0.01% |
253
-277
| -52% | -$10.1K |
|
1877
Deckers Outdoor
DECK
$13.3B
| $1.02M | ﹤0.01% |
+34,896
| New | +$907K |
|
1878
CALL
PVH
PVH
$3.71B
| $1.02M | ﹤0.01% |
108
+16
| +17% | +$1.77K |
|
|
LITS
1879
CALL
Lite Strategy Inc
LITS
$33.6M
| $1.02M | ﹤0.01% |
204
+168
| +467% | +$9.86K |
|
1880
PUT
Arlo Technologies
ARLO
$1.4B
| $1.02M | ﹤0.01% |
2,543
-1,102
| -30% | -$4.33K |
|
1881
Home Depot
HD
$332B
| $1.02M | ﹤0.01% |
+4,900
| New | +$977K |
|
1882
CALL
BCE
BCE
$19.9B
| $1.02M | ﹤0.01% |
224
+221
| +7,367% | +$9.97K |
|
1883
CALL
Lennox International
LII
$18.8B
| $1.02M | ﹤0.01% |
37
-177
| -83% | -$48.3K |
|
1884
State Street Communication Services Select Sector SPDR ETF
XLC
$21.9B
| $1.02M | ﹤0.01% |
+20,675
| New | +$1.01M |
|
1885
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $1.02M | ﹤0.01% |
11,509
-14,421
| -56% | -$1.25M |
|
1886
O'Reilly Automotive
ORLY
$72.4B
| $1.02M | ﹤0.01% |
41,295
+26,475
| +179% | +$671K |
|
1887
CALL
Ares Capital
ARCC
$13.5B
| $1.01M | ﹤0.01% |
566
-109
| -16% | -$1.93K |
|
1888
Canadian Solar
CSIQ
$906M
| $1.01M | ﹤0.01% |
46,512
-21,430
| -32% | -$425K |
|
1889
CALL
Funko
FNKO
$323M
| $1.01M | ﹤0.01% |
419
+321
| +328% | +$6.82K |
|
1890
Vanguard FTSE Emerging Markets ETF
VWO
$119B
| $1.01M | ﹤0.01% |
23,853
-69,995
| -75% | -$2.94M |
|
1891
PUT
Alcon
ALC
$33.1B
| $1.01M | ﹤0.01% |
+163
| New | +$9.57K |
|
1892
ProShares VIX Short-Term Futures ETF
VIXY
$211M
| $1.01M | ﹤0.01% |
+591
| New | +$1.08M |
|
|
BEAT
1893
CALL
DELISTED
BioTelemetry, Inc.
BEAT
| $1.01M | ﹤0.01% |
210
+59
| +39% | +$3.1K |
|
1894
Paysign
PAYS
$486M
| $1.01M | ﹤0.01% |
+75,533
| New | +$719K |
|
1895
CALL
SFL Corp
SFL
$1.59B
| $1.01M | ﹤0.01% |
807
+14
| +2% | +$177 |
|
|
ATNX
1896
CALL
DELISTED
Athenex, Inc. Common Stock
ATNX
| $1.01M | ﹤0.01% |
26
+25
| +2,500% | +$6.93K |
|
1897
CALL
Commercial Metals
CMC
$7.63B
| $1.01M | ﹤0.01% |
565
+543
| +2,468% | +$8.88K |
|
1898
Floor & Decor
FND
$5.81B
| $1.01M | ﹤0.01% |
+24,070
| New | +$1.01M |
|
1899
CALL
Applied Optoelectronics
AAOI
$8.04B
| $1.01M | ﹤0.01% |
979
+605
| +162% | +$6.47K |
|
1900
CALL
Encompass Health
EHC
$11.2B
| $1M | ﹤0.01% |
199
+12
| +6% | +$582 |
|
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.