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 | |
|---|---|---|---|---|---|---|
2076
Immersion
IMMR
$216M
| $826K | ﹤0.01% |
108,612
+6,594
| +6% | +$55.6K |
|
2077
CALL
Invesco CurrencyShares Swiss Franc Trust
FXF
$409M
| $825K | ﹤0.01% |
87
+85
| +4,250% | +$7.87K |
|
2078
CALL
NRG Energy
NRG
$29.8B
| $825K | ﹤0.01% |
235
-5
| -2% | -$188 |
|
2079
PUT
Canadian Imperial Bank of Commerce
CM
$107B
| $824K | ﹤0.01% |
210
-148
| -41% | -$5.96K |
|
|
STI
2080
PUT
DELISTED
SunTrust Banks, Inc.
STI
| $823K | ﹤0.01% |
131
-395
| -75% | -$24.8K |
|
2081
PUT
Cameco
CCJ
$38.3B
| $822K | ﹤0.01% |
767
+121
| +19% | +$1.3K |
|
2082
Unilever
UL
$131B
| $822K | ﹤0.01% |
+11,797
| New | +$801K |
|
|
SMAR
2083
PUT
DELISTED
Smartsheet Inc.
SMAR
| $822K | ﹤0.01% |
170
-426
| -71% | -$18.1K |
|
2084
CALL
CorMedix
CRMD
$617M
| $821K | ﹤0.01% |
916
-596
| -39% | -$4.68K |
|
2085
PUT
Synaptics
SYNA
$4.41B
| $821K | ﹤0.01% |
282
-218
| -44% | -$7.11K |
|
2086
CALL
CareDx
CDNA
$1.92B
| $820K | ﹤0.01% |
228
-177
| -44% | -$5.67K |
|
2087
PUT
Pan American Silver
PAAS
$18.6B
| $820K | ﹤0.01% |
636
+168
| +36% | +$2.03K |
|
2088
PUT
Ryanair
RYAAY
$29.5B
| $820K | ﹤0.01% |
320
+37
| +13% | +$1.05K |
|
2089
PUT
Essential Properties Realty Trust
EPRT
$6.99B
| $819K | ﹤0.01% |
409
+24
| +6% | +$489 |
|
|
HTT
2090
PUT
High Templar Tech Ltd
HTT
$377M
| $819K | ﹤0.01% |
1,092
+306
| +39% | +$2.11K |
|
2091
CALL
Box
BOX
$4.02B
| $818K | ﹤0.01% |
465
-65
| -12% | -$1.24K |
|
2092
iShares MSCI South Korea ETF
EWY
$21.7B
| $818K | ﹤0.01% |
13,664
-27,588
| -67% | -$1.64M |
|
|
HTT
2093
CALL
High Templar Tech Ltd
HTT
$377M
| $818K | ﹤0.01% |
1,091
+696
| +176% | +$4.8K |
|
2094
PUT
Shake Shack
SHAK
$2.3B
| $815K | ﹤0.01% |
113
-67
| -37% | -$4.13K |
|
2095
PUT
Inogen
INGN
$167M
| $814K | ﹤0.01% |
122
+52
| +74% | +$3.96K |
|
2096
CF Industries
CF
$19.2B
| $811K | ﹤0.01% |
17,375
+3,943
| +29% | +$171K |
|
2097
PUT
WD-40
WDFC
$3.1B
| $811K | ﹤0.01% |
51
-2
| -4% | -$328 |
|
2098
MongoDB
MDB
$24B
| $809K | ﹤0.01% |
5,324
-26,611
| -83% | -$3.86M |
|
2099
PUT
Hartford Financial Services
HIG
$38.5B
| $807K | ﹤0.01% |
145
+116
| +400% | +$6.13K |
|
|
NAV
2100
CALL
DELISTED
Navistar International
NAV
| $806K | ﹤0.01% |
234
+118
| +102% | +$3.92K |
|
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.