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 | |
|---|---|---|---|---|---|---|
|
SCHW
651
PUT
Charles Schwab
SCHW
$177B
| $5.33M | 0.01% |
1,326
+283
| +27% | +$12.3K |
|
652
PUT
NextEra Energy
NEE
$187B
| $5.33M | 0.01% |
1,040
-1,764
| -63% | -$86.8K |
|
653
PUT
AstraZeneca
AZN
$261B
| $5.3M | 0.01% |
642
+321
| +100% | +$25.2K |
|
654
CALL
MGM Resorts International
MGM
$11.5B
| $5.29M | 0.01% |
1,850
+506
| +38% | +$13.5K |
|
655
CALL
Dell
DELL
$284B
| $5.27M | 0.01% |
2,048
-470
| -19% | -$14.7K |
|
656
PUT
Qorvo
QRVO
$7.65B
| $5.27M | 0.01% |
791
-156
| -16% | -$10.8K |
|
657
CALL
Truist Financial
TFC
$62.5B
| $5.26M | 0.01% |
1,071
-1,364
| -56% | -$66.8K |
|
658
CALL
MetLife
MET
$59.5B
| $5.25M | 0.01% |
1,057
-577
| -35% | -$27.1K |
|
659
PUT
Edison International
EIX
$30.6B
| $5.24M | 0.01% |
778
-264
| -25% | -$16.4K |
|
660
PUT
Carnival Corporation Ltd
CCL
$34.6B
| $5.22M | 0.01% |
1,121
-225
| -17% | -$11.8K |
|
661
CALL
Paycom
PAYC
$6.47B
| $5.21M | 0.01% |
230
-176
| -43% | -$36.1K |
|
|
BLUE
662
CALL
DELISTED
bluebird bio
BLUE
| $5.18M | 0.01% |
31
+15
| +94% | +$25.9K |
|
663
CALL
International Paper
IP
$20.1B
| $5.15M | 0.01% |
1,256
+292
| +30% | +$12.4K |
|
664
Royal Caribbean
RCL
$76B
| $5.13M | 0.01% |
42,312
+27,481
| +185% | +$3.35M |
|
665
CALL
Air Products & Chemicals
APD
$65.5B
| $5.12M | 0.01% |
226
-68
| -23% | -$14.1K |
|
666
CALL
Zoom
ZM
$24.7B
| $5.11M | 0.01% |
+576
| New | +$47.4K |
|
|
AMRN
667
PUT
Amarin Corp
AMRN
$285M
| $5.11M | 0.01% |
132
+2
| +2% | +$732 |
|
668
CALL
Insulet
PODD
$11B
| $5.11M | 0.01% |
428
+411
| +2,418% | +$42.1K |
|
669
PUT
Ciena
CIEN
$57.7B
| $5.09M | 0.01% |
1,238
+51
| +4% | +$1.96K |
|
670
CALL
C.H. Robinson
CHRW
$24.2B
| $5.09M | 0.01% |
603
+305
| +102% | +$25.7K |
|
|
WP
671
PUT
DELISTED
Worldpay, Inc.
WP
| $5.07M | 0.01% |
414
-275
| -40% | -$32.6K |
|
672
PUT
Pinduoduo
PDD
$119B
| $5.07M | 0.01% |
2,459
-330
| -12% | -$7.14K |
|
673
PUT
Monster Beverage
MNST
$91.5B
| $5.05M | 0.01% |
1,584
-104
| -6% | -$3.13K |
|
674
CALL
T. Rowe Price
TROW
$24.6B
| $5.05M | 0.01% |
460
+292
| +174% | +$30.7K |
|
675
CALL
Microchip Technology
MCHP
$44.2B
| $5.04M | 0.01% |
1,162
-286
| -20% | -$12.7K |
|
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.