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 | |
|---|---|---|---|---|---|---|
1451
CALL
Exponent
EXPO
$2.98B
| $1.67M | ﹤0.01% |
285
+98
| +52% | +$5.58K |
|
|
PTR
1452
PUT
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $1.67M | ﹤0.01% |
303
+13
| +4% | +$779 |
|
1453
PUT
Corning
GLW
$126B
| $1.66M | ﹤0.01% |
501
+154
| +44% | +$4.94K |
|
1454
Owens Corning
OC
$11.5B
| $1.66M | ﹤0.01% |
28,562
+24,171
| +550% | +$1.23M |
|
|
BZUN
1455
PUT
Baozun
BZUN
$144M
| $1.66M | ﹤0.01% |
333
-369
| -53% | -$15.9K |
|
1456
CALL
LGI Homes
LGIH
$1.4B
| $1.66M | ﹤0.01% |
232
+39
| +20% | +$2.71K |
|
1457
CALL
Semtech
SMTC
$11.7B
| $1.66M | ﹤0.01% |
345
+49
| +17% | +$2.38K |
|
1458
CALL
Darden Restaurants
DRI
$22.5B
| $1.66M | ﹤0.01% |
136
+15
| +12% | +$1.78K |
|
1459
PUT
Rapid7
RPD
$634M
| $1.65M | ﹤0.01% |
286
+154
| +117% | +$8.1K |
|
1460
CALL
KB Home
KBH
$3.48B
| $1.65M | ﹤0.01% |
641
+197
| +44% | +$5.07K |
|
1461
CALL
Jack Henry & Associates
JKHY
$10.7B
| $1.65M | ﹤0.01% |
123
-114
| -48% | -$15.8K |
|
1462
Kohl's
KSS
$2.03B
| $1.64M | ﹤0.01% |
+34,587
| New | +$2.09M |
|
|
ABB
1463
PUT
DELISTED
ABB Ltd
ABB
| $1.64M | ﹤0.01% |
820
-1,101
| -57% | -$21.4K |
|
|
CEQP
1464
CALL
DELISTED
Crestwood Equity Partners LP
CEQP
| $1.64M | ﹤0.01% |
459
+427
| +1,334% | +$15.3K |
|
|
HUYA
1465
PUT
Huya Inc
HUYA
$542M
| $1.64M | ﹤0.01% |
664
-195
| -23% | -$4.48K |
|
1466
Blackstone
BX
$104B
| $1.64M | ﹤0.01% |
36,858
+23,262
| +171% | +$928K |
|
1467
PUT
Paychex
PAYX
$40.4B
| $1.64M | ﹤0.01% |
199
+67
| +51% | +$5.65K |
|
|
SFLY
1468
DELISTED
Shutterfly, Inc.
SFLY
| $1.64M | ﹤0.01% |
32,370
+19,670
| +155% | +$899K |
|
1469
Moody's
MCO
$81.7B
| $1.64M | ﹤0.01% |
+8,375
| New | +$1.59M |
|
1470
CALL
Genpact
G
$5.3B
| $1.63M | ﹤0.01% |
429
+216
| +101% | +$7.86K |
|
1471
PUT
Zebra Technologies
ZBRA
$12.4B
| $1.63M | ﹤0.01% |
78
+26
| +50% | +$5.24K |
|
1472
PUT
NIO
NIO
$11.3B
| $1.63M | ﹤0.01% |
6,406
-4,550
| -42% | -$18.3K |
|
|
CBM
1473
PUT
DELISTED
Cambrex Corporation
CBM
| $1.63M | ﹤0.01% |
349
+204
| +141% | +$8.56K |
|
1474
CALL
Precigen
PGEN
$1.93B
| $1.63M | ﹤0.01% |
2,131
+440
| +26% | +$2.37K |
|
|
MRO
1475
CALL
DELISTED
Marathon Oil Corporation
MRO
| $1.63M | ﹤0.01% |
1,149
-106
| -8% | -$1.64K |
|
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.