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 | |
|---|---|---|---|---|---|---|
1526
CALL
ProShares UltraShort Industrials
SIJ
$5.74M
| $1.53M | ﹤0.01% |
29
-408
| -93% | -$88.4K |
|
1527
CALL
National Healthcare
NHC
$3.53B
| $1.52M | ﹤0.01% |
188
-44
| -19% | -$3.4K |
|
1528
CALL
Old National Bancorp
ONB
$10.1B
| $1.52M | ﹤0.01% |
918
-87
| -9% | -$1.45K |
|
1529
PUT
Sociedad Química y Minera de Chile
SQM
$19.6B
| $1.52M | ﹤0.01% |
489
+42
| +9% | +$1.43K |
|
1530
PUT
Macerich
MAC
$7.32B
| $1.52M | ﹤0.01% |
454
+424
| +1,413% | +$16.7K |
|
1531
Atlassian
TEAM
$22B
| $1.52M | ﹤0.01% |
11,624
-583
| -5% | -$70.2K |
|
1532
PUT
Banco Santander
SAN
$194B
| $1.52M | ﹤0.01% |
3,462
+2,921
| +540% | +$13.1K |
|
1533
PUT
Unilever
UL
$131B
| $1.52M | ﹤0.01% |
218
+126
| +137% | +$8.55K |
|
1534
Pinterest
PINS
$12.4B
| $1.52M | ﹤0.01% |
+55,738
| New | +$1.52M |
|
1535
American Airlines Group
AAL
$9.58B
| $1.52M | ﹤0.01% |
46,489
-151,869
| -77% | -$4.9M |
|
1536
PUT
FMC
FMC
$1.42B
| $1.51M | ﹤0.01% |
206
+25
| +14% | +$1.96K |
|
1537
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$712M
| $1.51M | ﹤0.01% |
374
-669
| -64% | -$22.5K |
|
1538
CALL
Cleveland-Cliffs
CLF
$6.81B
| $1.51M | ﹤0.01% |
1,419
-41
| -3% | -$404 |
|
1539
State Street Consumer Discretionary Select Sector SPDR ETF
XLY
$21.4B
| $1.51M | ﹤0.01% |
+25,418
| New | +$1.49M |
|
1540
CALL
BioMarin Pharmaceuticals
BMRN
$11.5B
| $1.51M | ﹤0.01% |
176
+95
| +117% | +$8.13K |
|
1541
CALL
Packaging Corp of America
PKG
$22.7B
| $1.51M | ﹤0.01% |
158
+157
| +15,700% | +$15.2K |
|
1542
PUT
Huntington Ingalls Industries
HII
$11.3B
| $1.5M | ﹤0.01% |
67
-186
| -74% | -$39.9K |
|
1543
DXC Technology
DXC
$1.63B
| $1.5M | ﹤0.01% |
+27,235
| New | +$1.58M |
|
|
MDCO
1544
DELISTED
Medicines Co
MDCO
| $1.5M | ﹤0.01% |
41,125
+24,112
| +142% | +$787K |
|
1545
PUT
Gen Digital
GEN
$15.6B
| $1.49M | ﹤0.01% |
686
+218
| +47% | +$4.69K |
|
1546
PUT
Old Dominion Freight Line
ODFL
$48.5B
| $1.49M | ﹤0.01% |
300
-75
| -20% | -$3.65K |
|
1547
CALL
National Beverage
FIZZ
$2.87B
| $1.49M | ﹤0.01% |
668
+210
| +46% | +$5.4K |
|
1548
PUT
United Therapeutics
UTHR
$26.3B
| $1.49M | ﹤0.01% |
191
-166
| -46% | -$15.5K |
|
1549
Ionis Pharmaceuticals
IONS
$9.35B
| $1.49M | ﹤0.01% |
23,183
-6,185
| -21% | -$437K |
|
|
WAGE
1550
DELISTED
WageWorks, Inc.
WAGE
| $1.49M | ﹤0.01% |
29,264
+11,321
| +63% | +$535K |
|
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.