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 | |
|---|---|---|---|---|---|---|
1426
CALL
Energy Transfer Partners
ET
$70.1B
| $1.72M | ﹤0.01% |
1,223
+308
| +34% | +$4.56K |
|
1427
Tyson Foods
TSN
$20.2B
| $1.72M | ﹤0.01% |
21,289
+2,935
| +16% | +$226K |
|
|
EMBJ
1428
PUT
Embraer S.A. ADS
EMBJ
$11.6B
| $1.72M | ﹤0.01% |
852
-109
| -11% | -$2.1K |
|
1429
CALL
National Bank Holdings
NBHC
$1.93B
| $1.71M | ﹤0.01% |
472
+372
| +372% | +$13.5K |
|
1430
CALL
QuinStreet
QNST
$870M
| $1.71M | ﹤0.01% |
1,081
+1,012
| +1,467% | +$15.1K |
|
1431
PUT
DexCom
DXCM
$27.6B
| $1.71M | ﹤0.01% |
456
-428
| -48% | -$13.5K |
|
|
KYNB
1432
CALL
Kyntra Bio
KYNB
$28.5M
| $1.7M | ﹤0.01% |
15
-2
| -12% | -$2.19K |
|
|
LKFT
1433
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.82B
| $1.7M | ﹤0.01% |
+13,209
| New | +$1.57M |
|
1434
PUT
ArcelorMittal
MT
$50.4B
| $1.7M | ﹤0.01% |
943
-352
| -27% | -$6.64K |
|
1435
CALL
M&T Bank
MTB
$36.2B
| $1.7M | ﹤0.01% |
100
-75
| -43% | -$12.4K |
|
1436
CALL
Levi Strauss
LEVI
$9.44B
| $1.7M | ﹤0.01% |
812
+250
| +44% | +$5.5K |
|
1437
PUT
Zimmer Biomet
ZBH
$17.7B
| $1.7M | ﹤0.01% |
148
+32
| +28% | +$3.75K |
|
|
CLVS
1438
CALL
DELISTED
Clovis Oncology, Inc.
CLVS
| $1.69M | ﹤0.01% |
1,139
+812
| +248% | +$14.7K |
|
1439
CALL
Expeditors International
EXPD
$22.9B
| $1.69M | ﹤0.01% |
223
+35
| +19% | +$2.64K |
|
1440
PUT
Sempra
SRE
$60.8B
| $1.69M | ﹤0.01% |
246
-70
| -22% | -$4.59K |
|
1441
PUT
Molina Healthcare
MOH
$10.3B
| $1.69M | ﹤0.01% |
118
-71
| -38% | -$9.73K |
|
|
XIFR
1442
CALL
XPLR Infrastructure LP
XIFR
$1.18B
| $1.69M | ﹤0.01% |
350
+260
| +289% | +$12.1K |
|
1443
PUT
Texas Roadhouse
TXRH
$12.7B
| $1.69M | ﹤0.01% |
314
-23
| -7% | -$1.29K |
|
1444
CALL
Ryder
R
$10.3B
| $1.68M | ﹤0.01% |
289
+200
| +225% | +$11.9K |
|
1445
Kratos Defense & Security Solutions
KTOS
$8.88B
| $1.68M | ﹤0.01% |
73,321
+20,669
| +39% | +$390K |
|
1446
Carvana
CVNA
$43.3B
| $1.68M | ﹤0.01% |
+133,955
| New | +$1.72M |
|
1447
WisdomTree India Earnings Fund ETF
EPI
$2.02B
| $1.67M | ﹤0.01% |
+64,129
| New | +$1.66M |
|
1448
CALL
Chegg
CHGG
$108M
| $1.67M | ﹤0.01% |
433
-19
| -4% | -$716 |
|
1449
CALL
New Oriental
EDU
$7.84B
| $1.67M | ﹤0.01% |
173
-187
| -52% | -$16.7K |
|
1450
CALL
CenterPoint Energy
CNP
$29.1B
| $1.67M | ﹤0.01% |
583
-8
| -1% | -$239 |
|
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.