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 | |
|---|---|---|---|---|---|---|
1301
CALL
Teladoc Health
TDOC
$1.58B
| $2.04M | 0.01% |
307
+109
| +55% | +$6.35K |
|
|
BBBY
1302
CALL
Bed Bath & Beyond
BBBY
$473M
| $2.03M | 0.01% |
1,991
-499
| -20% | -$4.66K |
|
1303
PUT
Ubiquiti
UI
$31.8B
| $2.02M | 0.01% |
154
-248
| -62% | -$35.9K |
|
1304
PUT
Hershey
HSY
$35.4B
| $2.02M | 0.01% |
151
-278
| -65% | -$35.3K |
|
1305
CALL
Waters Corp
WAT
$36.8B
| $2.02M | 0.01% |
94
+9
| +11% | +$1.97K |
|
1306
PUT
Mettler-Toledo International
MTD
$26.8B
| $2.02M | 0.01% |
24
+19
| +380% | +$14.3K |
|
1307
Cardinal Health
CAH
$53.4B
| $2.01M | 0.01% |
42,686
-6,810
| -14% | -$314K |
|
1308
PUT
HUB Group
HUBG
$3.01B
| $2.01M | 0.01% |
958
-96
| -9% | -$2.02K |
|
1309
PUT
Kinder Morgan
KMI
$73.1B
| $2.01M | 0.01% |
963
+113
| +13% | +$2.28K |
|
1310
CALL
Alnylam Pharmaceuticals
ALNY
$36.3B
| $2.01M | 0.01% |
277
+56
| +25% | +$4.3K |
|
1311
CALL
Citizens Financial Group
CFG
$30.4B
| $2.01M | 0.01% |
568
-34
| -6% | -$1.19K |
|
1312
PUT
Guidewire Software
GWRE
$11.5B
| $2.01M | 0.01% |
198
+117
| +144% | +$11.9K |
|
1313
CALL
Tapestry
TPR
$28.8B
| $2M | 0.01% |
632
-43
| -6% | -$1.34K |
|
1314
CALL
Deutsche Bank
DB
$66.3B
| $2M | 0.01% |
2,627
-414
| -14% | -$3.19K |
|
|
GBT
1315
CALL
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $2M | 0.01% |
380
+90
| +31% | +$5.17K |
|
|
FL
1316
CALL
DELISTED
Foot Locker
FL
| $2M | 0.01% |
476
-182
| -28% | -$9.47K |
|
1317
CALL
Ventas
VTR
$48.9B
| $2M | 0.01% |
292
+123
| +73% | +$7.84K |
|
1318
PUT
AeroVironment
AVAV
$7.57B
| $1.99M | 0.01% |
351
+303
| +631% | +$19.9K |
|
1319
Eagle Materials
EXP
$6.6B
| $1.99M | 0.01% |
+21,436
| New | +$1.89M |
|
1320
CALL
McCormick & Company Non-Voting
MKC
$13.4B
| $1.98M | 0.01% |
256
-230
| -47% | -$17.7K |
|
|
1321
Ventas
VTR
$48.9B
| $1.98M | 0.01% |
28,999
+8,294
| +40% | +$529K |
|
1322
iShares MSCI Emerging Markets ETF
EEM
$28B
| $1.98M | 0.01% |
46,186
+44,872
| +3,415% | +$1.9M |
|
1323
PUT
Darden Restaurants
DRI
$22.5B
| $1.97M | 0.01% |
162
-20
| -11% | -$2.38K |
|
1324
Direxion Daily Semiconductor Bull 3X ETF
SOXL
$18.7B
| $1.97M | 0.01% |
199,545
+43,380
| +28% | +$431K |
|
1325
CALL
CF Industries
CF
$19.2B
| $1.97M | 0.01% |
421
+232
| +123% | +$10.1K |
|
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.