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 | |
|---|---|---|---|---|---|---|
2601
PUT
VF Corp
VFC
$6.74B
| $481K | ﹤0.01% |
76
-436
| -85% | -$37.6K |
|
|
MNDT
2602
CALL
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $481K | ﹤0.01% |
325
-858
| -73% | -$13.2K |
|
2603
CALL
Fortive
FTV
$19.1B
| $480K | ﹤0.01% |
94
-77
| -45% | -$4K |
|
2604
CALL
SunCoke Energy
SXC
$762M
| $480K | ﹤0.01% |
542
+508
| +1,494% | +$4.18K |
|
2605
PUT
WisdomTree
WT
$3.01B
| $480K | ﹤0.01% |
778
+220
| +39% | +$1.49K |
|
|
SRNE
2606
CALL
DELISTED
Sorrento Therapeutics, Inc.
SRNE
| $480K | ﹤0.01% |
1,799
+488
| +37% | +$1.76K |
|
2607
CALL
Shutterstock
SSTK
$216M
| $478K | ﹤0.01% |
122
-56
| -31% | -$2.32K |
|
2608
Travelzoo
TZOO
$106M
| $478K | ﹤0.01% |
31,009
+27,676
| +830% | +$466K |
|
2609
Chemours
CC
$2.57B
| $477K | ﹤0.01% |
+19,897
| New | +$586K |
|
2610
PUT
CDW
CDW
$17.6B
| $477K | ﹤0.01% |
43
-108
| -72% | -$11.3K |
|
2611
CALL
Icon
ICLR
$12.9B
| $477K | ﹤0.01% |
31
+8
| +35% | +$1.12K |
|
2612
PUT
Kennametal
KMT
$2.69B
| $477K | ﹤0.01% |
129
-5
| -4% | -$181 |
|
2613
Penske Automotive Group
PAG
$14.3B
| $476K | ﹤0.01% |
+10,067
| New | +$457K |
|
2614
Starbucks
SBUX
$119B
| $476K | ﹤0.01% |
+5,680
| New | +$445K |
|
2615
CALL
RadNet
RDNT
$4.9B
| $475K | ﹤0.01% |
345
+138
| +67% | +$1.77K |
|
|
CDK
2616
CALL
DELISTED
CDK Global, Inc.
CDK
| $474K | ﹤0.01% |
96
-159
| -62% | -$8.52K |
|
2617
PUT
OptimizeRx
OPRX
$119M
| $473K | ﹤0.01% |
+292
| New | +$3.94K |
|
|
DFRG
2618
CALL
DELISTED
Del Frisco's Restaurant Group, Inc. Common Stock
DFRG
| $473K | ﹤0.01% |
595
+37
| +7% | +$245 |
|
2619
PUT
Revvity
RVTY
$12.3B
| $472K | ﹤0.01% |
49
-174
| -78% | -$16.2K |
|
2620
Iovance Biotherapeutics
IOVA
$2.22B
| $471K | ﹤0.01% |
+19,235
| New | +$290K |
|
2621
PUT
Vanguard High Dividend Yield ETF
VYM
$81.4B
| $471K | ﹤0.01% |
54
+15
| +38% | +$1.3K |
|
|
PDCO
2622
PUT
DELISTED
Patterson Companies, Inc.
PDCO
| $471K | ﹤0.01% |
206
+151
| +275% | +$3.36K |
|
2623
Boyd Gaming
BYD
$6.59B
| $470K | ﹤0.01% |
+17,478
| New | +$478K |
|
2624
PUT
FirstCash
FCFS
$8.8B
| $470K | ﹤0.01% |
47
+18
| +62% | +$1.71K |
|
|
JKS
2625
PUT
JinkoSolar
JKS
$800M
| $468K | ﹤0.01% |
216
-214
| -50% | -$4.32K |
|
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.