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 | |
|---|---|---|---|---|---|---|
|
TIVO
4126
CALL
DELISTED
Tivo Inc
TIVO
| $106K | ﹤0.01% |
144
-8
| -5% | -$64 |
|
|
CRCM
4127
CALL
DELISTED
CARE.COM, INC.
CRCM
| $106K | ﹤0.01% |
97
-88
| -48% | -$1.33K |
|
|
BOLD
4128
CALL
DELISTED
Audentes Therapeutics, Inc
BOLD
| $106K | ﹤0.01% |
28
-194
| -87% | -$7.45K |
|
4129
CALL
CEMIG Preferred Shares
CIG
$6.06B
| $105K | ﹤0.01% |
541
-122
| -18% | -$224 |
|
4130
CALL
Eldorado Gold
EGO
$8.33B
| $105K | ﹤0.01% |
182
-69
| -27% | -$291 |
|
4131
Glaukos
GKOS
$9.49B
| $105K | ﹤0.01% |
1,395
-3,375
| -71% | -$242K |
|
4132
PUT
Hain Celestial
HAIN
$44.6M
| $105K | ﹤0.01% |
48
-103
| -68% | -$2.26K |
|
4133
Insteel Industries
IIIN
$592M
| $105K | ﹤0.01% |
5,055
-211
| -4% | -$4.24K |
|
|
LOMA
4134
CALL
Loma Negra
LOMA
$1.34B
| $105K | ﹤0.01% |
90
+44
| +96% | +$464 |
|
4135
CALL
Mitek Systems
MITK
$756M
| $105K | ﹤0.01% |
106
+80
| +308% | +$854 |
|
4136
Pan American Silver
PAAS
$17.9B
| $105K | ﹤0.01% |
8,139
-31,510
| -79% | -$380K |
|
4137
PUT
ProPetro Holding
PUMP
$1.25B
| $105K | ﹤0.01% |
51
+27
| +113% | +$573 |
|
4138
Timken Company
TKR
$9.19B
| $105K | ﹤0.01% |
2,061
-2,579
| -56% | -$123K |
|
4139
PUT
Cactus
WHD
$3.63B
| $105K | ﹤0.01% |
32
+28
| +700% | +$973 |
|
4140
CALL
W.R. Berkley
WRB
$28.1B
| $105K | ﹤0.01% |
+36
| New | +$985 |
|
|
VCRA
4141
PUT
DELISTED
VOCERA COMMUNICATIONS, INC.
VCRA
| $105K | ﹤0.01% |
33
+3
| +10% | +$96 |
|
|
HZNP
4142
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $105K | ﹤0.01% |
4,370
-2,171
| -33% | -$55.1K |
|
|
BRKL
4143
DELISTED
Brookline Bancorp
BRKL
| $104K | ﹤0.01% |
6,790
+6,758
| +21,119% | +$101K |
|
4144
EPR Properties
EPR
$4.89B
| $104K | ﹤0.01% |
+1,398
| New | +$109K |
|
4145
FirstCash
FCFS
$8.77B
| $104K | ﹤0.01% |
+1,040
| New | +$98.8K |
|
4146
Gyre Therapeutics
GYRE
$629M
| $104K | ﹤0.01% |
1,892
-1,026
| -35% | -$64.1K |
|
|
PINC
4147
DELISTED
Premier
PINC
| $104K | ﹤0.01% |
2,669
-867
| -25% | -$31.3K |
|
|
SAFE
4148
CALL
Safehold
SAFE
$1.17B
| $104K | ﹤0.01% |
+17
| New | +$814 |
|
4149
CALL
Teekay
TK
$996M
| $104K | ﹤0.01% |
304
-283
| -48% | -$1.09K |
|
|
GPOR
4150
PUT
DELISTED
Gulfport Energy Corp.
GPOR
| $104K | ﹤0.01% |
212
+127
| +149% | +$809 |
|
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.