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 | |
|---|---|---|---|---|---|---|
1501
CALL
ING
ING
$93.8B
| $1.59M | ﹤0.01% |
1,375
-1,656
| -55% | -$19.7K |
|
1502
PUT
Global Payments
GPN
$22.1B
| $1.58M | ﹤0.01% |
99
-337
| -77% | -$50.1K |
|
|
CS
1503
PUT
DELISTED
Credit Suisse Group
CS
| $1.58M | ﹤0.01% |
1,323
-809
| -38% | -$9.85K |
|
1504
CALL
Trupanion
TRUP
$1.05B
| $1.58M | ﹤0.01% |
438
+146
| +50% | +$4.8K |
|
1505
CVS Health
CVS
$137B
| $1.58M | ﹤0.01% |
+28,949
| New | +$1.56M |
|
1506
Capri Holdings
CPRI
$1.77B
| $1.57M | ﹤0.01% |
45,416
+11,548
| +34% | +$470K |
|
1507
CALL
Sabre
SABR
$656M
| $1.57M | ﹤0.01% |
707
-161
| -19% | -$3.45K |
|
1508
Wynn Resorts
WYNN
$10.1B
| $1.57M | ﹤0.01% |
12,647
-58,803
| -82% | -$7.56M |
|
|
LHCG
1509
CALL
DELISTED
LHC Group LLC
LHCG
| $1.57M | ﹤0.01% |
131
-106
| -45% | -$12K |
|
1510
PUT
British American Tobacco
BTI
$132B
| $1.56M | ﹤0.01% |
449
-799
| -64% | -$30.3K |
|
1511
PUT
Wingstop
WING
$3.68B
| $1.56M | ﹤0.01% |
165
-171
| -51% | -$13.9K |
|
1512
Edison International
EIX
$30.7B
| $1.56M | ﹤0.01% |
23,151
-5,810
| -20% | -$361K |
|
1513
VanEck Semiconductor ETF
SMH
$67.6B
| $1.56M | ﹤0.01% |
+28,282
| New | +$1.54M |
|
1514
PUT
Energy Transfer Partners
ET
$70.1B
| $1.55M | ﹤0.01% |
1,104
-376
| -25% | -$5.57K |
|
1515
CALL
Arrow Electronics
ARW
$10.9B
| $1.55M | ﹤0.01% |
218
-75
| -26% | -$5.53K |
|
1516
Weibo
WB
$1.9B
| $1.55M | ﹤0.01% |
35,650
+23,144
| +185% | +$1.3M |
|
|
MGLN
1517
PUT
DELISTED
Magellan Health Services, Inc.
MGLN
| $1.55M | ﹤0.01% |
209
+93
| +80% | +$6.25K |
|
1518
PUT
AerCap
AER
$23.9B
| $1.55M | ﹤0.01% |
298
-539
| -64% | -$26.4K |
|
1519
CALL
StoneCo
STNE
$2.62B
| $1.55M | ﹤0.01% |
524
-70
| -12% | -$2.06K |
|
1520
CALL
Intercontinental Exchange
ICE
$82.4B
| $1.55M | ﹤0.01% |
180
-274
| -60% | -$22.4K |
|
|
NVEE
1521
CALL
DELISTED
NV5 Global
NVEE
| $1.55M | ﹤0.01% |
760
-220
| -22% | -$3.93K |
|
1522
PUT
Madison Square Garden
MSGS
$9.54B
| $1.54M | ﹤0.01% |
77
+17
| +28% | +$3.62K |
|
|
UN
1523
DELISTED
Unilever NV New York Registry Shares
UN
| $1.54M | ﹤0.01% |
25,354
-431
| -2% | -$25.8K |
|
1524
CALL
Towne Bank
TOWN
$3.35B
| $1.54M | ﹤0.01% |
+564
| New | +$14.9K |
|
1525
CALL
Pinterest
PINS
$12.4B
| $1.53M | ﹤0.01% |
+564
| New | +$15.4K |
|
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.