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 | |
|---|---|---|---|---|---|---|
1651
CALL
Carter's
CRI
$1.43B
| $1.33M | ﹤0.01% |
+136
| New | +$13.2K |
|
|
SMAR
1652
CALL
DELISTED
Smartsheet Inc.
SMAR
| $1.33M | ﹤0.01% |
274
+59
| +27% | +$2.51K |
|
1653
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $1.32M | ﹤0.01% |
115
-8
| -7% | -$897 |
|
1654
CALL
Murphy USA
MUSA
$11.3B
| $1.32M | ﹤0.01% |
157
+78
| +99% | +$6.53K |
|
|
SKX
1655
PUT
DELISTED
Skechers
SKX
| $1.32M | ﹤0.01% |
419
+50
| +14% | +$1.54K |
|
1656
CALL
PACCAR
PCAR
$69.6B
| $1.32M | ﹤0.01% |
276
-534
| -66% | -$24.8K |
|
|
BFYT
1657
PUT
DELISTED
Benefytt Technologies, Inc. Class A Common Stock
BFYT
| $1.32M | ﹤0.01% |
508
-605
| -54% | -$15.2K |
|
|
RBS.PRX
1658
PUT
DELISTED
ROYAL BK SCOTLAND GRP"XCAPS"-A
RBS.PRX
| $1.31M | ﹤0.01% |
2,317
+2,260
| +3,965% | +$1.28M |
|
1659
PUT
Insulet
PODD
$11.3B
| $1.31M | ﹤0.01% |
110
-35
| -24% | -$3.59K |
|
1660
CALL
Amdocs
DOX
$5.53B
| $1.31M | ﹤0.01% |
211
-164
| -44% | -$9.47K |
|
|
SAFM
1661
CALL
DELISTED
Sanderson Farms Inc
SAFM
| $1.31M | ﹤0.01% |
96
+18
| +23% | +$2.55K |
|
1662
PUT
CRISPR Therapeutics
CRSP
$4.58B
| $1.31M | ﹤0.01% |
278
+105
| +61% | +$4.2K |
|
1663
CALL
Mid-America Apartment Communities
MAA
$15.6B
| $1.31M | ﹤0.01% |
111
-97
| -47% | -$10.9K |
|
1664
CALL
Signet Jewelers
SIG
$3.55B
| $1.31M | ﹤0.01% |
731
+243
| +50% | +$5.22K |
|
1665
PUT
Helmerich & Payne
HP
$3.53B
| $1.3M | ﹤0.01% |
258
-179
| -41% | -$9.85K |
|
1666
Southern Company
SO
$110B
| $1.3M | ﹤0.01% |
23,594
-57,578
| -71% | -$3.08M |
|
1667
PUT
Deutsche Bank
DB
$66.3B
| $1.3M | ﹤0.01% |
1,706
-487
| -22% | -$3.75K |
|
|
MNDT
1668
PUT
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $1.3M | ﹤0.01% |
879
+239
| +37% | +$3.67K |
|
1669
PUT
Dave & Buster's
PLAY
$343M
| $1.3M | ﹤0.01% |
321
+207
| +182% | +$10.5K |
|
1670
Teva Pharmaceuticals
TEVA
$35.9B
| $1.3M | ﹤0.01% |
+140,792
| New | +$1.7M |
|
1671
CALL
Sabesp
SBS
$19.7B
| $1.3M | ﹤0.01% |
5,502
+5,430
| +7,542% | +$11.9K |
|
|
TIVO
1672
DELISTED
Tivo Inc
TIVO
| $1.3M | ﹤0.01% |
176,189
+133,732
| +315% | +$1.07M |
|
1673
CALL
Fluor
FLR
$7.29B
| $1.3M | ﹤0.01% |
385
-164
| -30% | -$5.49K |
|
1674
PUT
Tandem Diabetes Care
TNDM
$1.17B
| $1.3M | ﹤0.01% |
201
-214
| -52% | -$13.8K |
|
1675
PUT
Casey's General Stores
CASY
$31.9B
| $1.29M | ﹤0.01% |
83
-245
| -75% | -$33.4K |
|
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.