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 | |
|---|---|---|---|---|---|---|
|
UCD
226
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $20.9M | 0.06% |
5,998
-770
| -11% | -$2.68M |
|
227
CALL
Accenture
ACN
$85.8B
| $20.8M | 0.06% |
1,127
-175
| -13% | -$31.4K |
|
228
PUT
Electronic Arts
EA
$52.4B
| $20.6M | 0.06% |
2,030
-269
| -12% | -$25.6K |
|
229
PUT
Fair Isaac
FICO
$28.5B
| $20.5M | 0.06% |
653
+547
| +516% | +$159K |
|
230
PUT
Palo Alto Networks
PANW
$272B
| $20.4M | 0.06% |
6,012
+1,638
| +37% | +$61.3K |
|
231
PUT
Autodesk
ADSK
$43.4B
| $20.2M | 0.06% |
1,240
-263
| -17% | -$44.2K |
|
232
PUT
Domino's
DPZ
$10.7B
| $20.1M | 0.05% |
721
+424
| +143% | +$116K |
|
233
CALL
Twilio
TWLO
$28.1B
| $20M | 0.05% |
1,467
-446
| -23% | -$59.4K |
|
234
PUT
Bank of America
BAC
$431B
| $19.8M | 0.05% |
6,829
-3,240
| -32% | -$93.4K |
|
235
PUT
Texas Instruments
TXN
$264B
| $19.7M | 0.05% |
1,719
-424
| -20% | -$47.4K |
|
236
CALL
Deere & Co
DE
$163B
| $19.6M | 0.05% |
1,184
+18
| +2% | +$2.8K |
|
237
CALL
Centene
CNC
$33B
| $19.5M | 0.05% |
3,716
+2,590
| +230% | +$140K |
|
238
PUT
Delta Air Lines
DAL
$55.1B
| $19.4M | 0.05% |
3,427
+307
| +10% | +$17.2K |
|
239
CALL
Spotify
SPOT
$98.9B
| $19.4M | 0.05% |
1,328
-66
| -5% | -$9.08K |
|
|
RDS.A
240
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $19.3M | 0.05% |
2,954
-1,679
| -36% | -$107K |
|
241
CALL
Comcast
CMCSA
$85.1B
| $19.3M | 0.05% |
4,555
+224
| +5% | +$9.45K |
|
|
STZ.B
242
CALL
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $19.1M | 0.05% |
971
+226
| +30% | +$44.1K |
|
243
CALL
Occidental Petroleum
OXY
$57.3B
| $19.1M | 0.05% |
3,800
+2,318
| +156% | +$130K |
|
|
RHT
244
CALL
DELISTED
Red Hat Inc
RHT
| $18.9M | 0.05% |
1,009
+17
| +2% | +$3.14K |
|
|
JJT
245
PUT
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $18.9M | 0.05% |
7,275
+2,953
| +68% | +$147K |
|
|
CGC
246
PUT
Canopy Growth
CGC
$389M
| $18.9M | 0.05% |
469
+48
| +11% | +$21.1K |
|
247
PUT
Northrop Grumman
NOC
$74.7B
| $18.8M | 0.05% |
583
-58
| -9% | -$17.3K |
|
248
CALL
Blackrock
BLK
$161B
| $18.8M | 0.05% |
400
-242
| -38% | -$109K |
|
249
CALL
Trade Desk
TTD
$8.41B
| $18.5M | 0.05% |
8,130
+3,170
| +64% | +$68.1K |
|
250
CALL
Workday
WDAY
$33.2B
| $18.5M | 0.05% |
900
+179
| +25% | +$36.1K |
|
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.