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 | |
|---|---|---|---|---|---|---|
1326
HDFC Bank
HDB
$119B
| $1.97M | 0.01% |
60,504
+53,304
| +740% | +$1.61M |
|
1327
PUT
Boyd Gaming
BYD
$6.47B
| $1.96M | 0.01% |
729
+673
| +1,202% | +$18.4K |
|
1328
PUT
OFG Bancorp
OFG
$2.21B
| $1.96M | 0.01% |
826
+155
| +23% | +$3.09K |
|
1329
PUT
Banco Bradesco
BBD
$38.1B
| $1.96M | 0.01% |
2,545
+1,208
| +90% | +$8.25K |
|
1330
CALL
Cardinal Health
CAH
$53.4B
| $1.95M | 0.01% |
415
+160
| +63% | +$7.38K |
|
1331
CALL
Jazz Pharmaceuticals
JAZZ
$15.9B
| $1.95M | 0.01% |
137
-103
| -43% | -$13.8K |
|
1332
PUT
Ally Financial
ALLY
$13.1B
| $1.95M | 0.01% |
628
+153
| +32% | +$4.51K |
|
1333
PUT
ICU Medical
ICUI
$3.93B
| $1.94M | 0.01% |
77
-20
| -21% | -$4.63K |
|
1334
CALL
Ubiquiti
UI
$31.8B
| $1.93M | 0.01% |
147
-53
| -27% | -$7.68K |
|
1335
PUT
Aptiv
APTV
$12B
| $1.93M | 0.01% |
239
-315
| -57% | -$24.9K |
|
|
VRNT
1336
CALL
DELISTED
Verint Systems
VRNT
| $1.93M | 0.01% |
705
-123
| -15% | -$3.7K |
|
1337
PUT
Exelixis
EXEL
$13.9B
| $1.93M | 0.01% |
902
+345
| +62% | +$7.23K |
|
1338
Lear
LEA
$7.19B
| $1.93M | 0.01% |
+13,834
| New | +$1.94M |
|
|
DISCK
1339
CALL
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $1.93M | 0.01% |
642
-1,423
| -69% | -$38.6K |
|
1340
PUT
Factset
FDS
$9.05B
| $1.92M | 0.01% |
67
-57
| -46% | -$15.8K |
|
1341
CALL
Iron Mountain
IRM
$38.2B
| $1.92M | 0.01% |
613
+307
| +100% | +$10.1K |
|
1342
CALL
Kinder Morgan
KMI
$73.1B
| $1.92M | 0.01% |
918
-2,118
| -70% | -$42.7K |
|
1343
CALL
Aon
AON
$77.3B
| $1.91M | 0.01% |
99
-22
| -18% | -$3.99K |
|
1344
PUT
BorgWarner
BWA
$13.2B
| $1.91M | 0.01% |
516
+466
| +932% | +$16.5K |
|
1345
PUT
Telecom Argentina
TEO
$5.89B
| $1.9M | 0.01% |
1,078
+1,012
| +1,533% | +$15.4K |
|
|
SEE
1346
CALL
DELISTED
Sealed Air
SEE
| $1.9M | 0.01% |
444
+28
| +7% | +$1.23K |
|
|
MOMO
1347
CALL
Hello Group
MOMO
$869M
| $1.89M | 0.01% |
529
-76
| -13% | -$2.53K |
|
1348
PUT
APA Corp
APA
$12.8B
| $1.89M | 0.01% |
653
-113
| -15% | -$3.51K |
|
|
AZPN
1349
CALL
DELISTED
ASPEN TECHNOLOGY INC
AZPN
| $1.89M | 0.01% |
152
-20
| -12% | -$249K |
|
1350
PUT
Devon Energy
DVN
$51.9B
| $1.89M | 0.01% |
661
-72
| -10% | -$2.14K |
|
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.