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 | |
|---|---|---|---|---|---|---|
1676
PUT
New Oriental
EDU
$7.84B
| $1.29M | ﹤0.01% |
134
-380
| -74% | -$34K |
|
1677
AGNC Investment
AGNC
$12.3B
| $1.29M | ﹤0.01% |
76,837
+9,831
| +15% | +$171K |
|
1678
CALL
Parker-Hannifin
PH
$125B
| $1.29M | ﹤0.01% |
76
+35
| +85% | +$6.04K |
|
1679
PUT
Ameriprise Financial
AMP
$46.8B
| $1.29M | ﹤0.01% |
89
+20
| +29% | +$2.89K |
|
1680
PTC
PTC
$13.7B
| $1.29M | ﹤0.01% |
+14,377
| New | +$1.29M |
|
1681
CALL
Dine Brands
DIN
$432M
| $1.29M | ﹤0.01% |
135
+45
| +50% | +$4.11K |
|
|
AMTD
1682
CALL
DELISTED
TD Ameritrade Holding Corp
AMTD
| $1.29M | ﹤0.01% |
258
-23
| -8% | -$1.19K |
|
1683
PUT
Public Storage
PSA
$60.2B
| $1.29M | ﹤0.01% |
54
-241
| -82% | -$55.3K |
|
1684
PUT
Boston Beer
SAM
$1.88B
| $1.28M | ﹤0.01% |
34
-3
| -8% | -$950 |
|
1685
CALL
Williams-Sonoma
WSM
$26.7B
| $1.28M | ﹤0.01% |
394
-82
| -17% | -$2.35K |
|
|
ETFC
1686
CALL
DELISTED
E*Trade Financial Corporation
ETFC
| $1.28M | ﹤0.01% |
287
-709
| -71% | -$33.9K |
|
|
CLDR
1687
DELISTED
Cloudera, Inc.
CLDR
| $1.28M | ﹤0.01% |
243,235
+61,830
| +34% | +$571K |
|
|
NLSN
1688
DELISTED
Nielsen Holdings plc
NLSN
| $1.28M | ﹤0.01% |
56,608
+50,038
| +762% | +$1.21M |
|
1689
CALL
Transocean
RIG
$5.92B
| $1.28M | ﹤0.01% |
1,994
+1,318
| +195% | +$9.79K |
|
|
CBPO
1690
CALL
DELISTED
China Biologic Products Holdings, Inc.
CBPO
| $1.28M | ﹤0.01% |
134
+15
| +13% | +$1.41K |
|
1691
PUT
Edwards Lifesciences
EW
$47.6B
| $1.27M | ﹤0.01% |
207
-1,518
| -88% | -$91.8K |
|
1692
CALL
NOV
NOV
$7.45B
| $1.27M | ﹤0.01% |
573
+306
| +115% | +$7.39K |
|
|
QVCGA
1693
PUT
DELISTED
QVC Group Inc Series A
QVCGA
| $1.27M | ﹤0.01% |
21
+17
| +425% | +$12.1K |
|
1694
PUT
Wheaton Precious Metals
WPM
$50.6B
| $1.27M | ﹤0.01% |
524
+203
| +63% | +$4.5K |
|
1695
Direxion Daily MSCI Brazil Bull 2X ETF
BRZU
$100M
| $1.26M | ﹤0.01% |
1,100
+558
| +103% | +$547K |
|
|
NVO
1696
CALL
Novo Nordisk
NVO
$216B
| $1.26M | ﹤0.01% |
496
-616
| -55% | -$15.2K |
|
|
SMAR
1697
DELISTED
Smartsheet Inc.
SMAR
| $1.26M | ﹤0.01% |
26,063
-21,520
| -45% | -$914K |
|
1698
PUT
LendingTree
TREE
$544M
| $1.26M | ﹤0.01% |
30
-37
| -55% | -$14.2K |
|
|
1699
State Street SPDR S&P 500 ETF Trust
SPY
$778B
| $1.26M | ﹤0.01% |
4,300
-141,160
| -97% | -$40.6M |
|
|
SFIX
1700
Stitch Fix
SFIX
$478M
| $1.26M | ﹤0.01% |
39,317
+32,893
| +512% | +$882K |
|
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.