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 | |
|---|---|---|---|---|---|---|
701
PUT
State Street
STT
$50.6B
| $4.79M | 0.01% |
855
+440
| +106% | +$27.3K |
|
702
CALL
Royal Gold
RGLD
$16.9B
| $4.79M | 0.01% |
467
-104
| -18% | -$9.37K |
|
703
CALL
Agilent Technologies
A
$39.5B
| $4.78M | 0.01% |
640
+186
| +41% | +$13.8K |
|
704
PUT
EPAM Systems
EPAM
$4.5B
| $4.78M | 0.01% |
276
-24
| -8% | -$4.13K |
|
705
CALL
PNC Financial Services
PNC
$99.5B
| $4.78M | 0.01% |
348
+46
| +15% | +$6.08K |
|
706
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$744M
| $4.76M | 0.01% |
908
-265
| -23% | -$5.17K |
|
707
PUT
Hormel Foods
HRL
$13.8B
| $4.75M | 0.01% |
1,172
+343
| +41% | +$13.9K |
|
708
PUT
Illumina
ILMN
$29.8B
| $4.75M | 0.01% |
133
-200
| -60% | -$63.1K |
|
|
BNY
709
PUT
Bank of New York Mellon
BNY
$109B
| $4.75M | 0.01% |
1,075
+261
| +32% | +$12.3K |
|
710
PUT
Southern Company
SO
$109B
| $4.73M | 0.01% |
855
+242
| +39% | +$13K |
|
|
CERN
711
CALL
DELISTED
Cerner Corp
CERN
| $4.72M | 0.01% |
644
+82
| +15% | +$5.53K |
|
|
DISH
712
CALL
DELISTED
DISH Network Corp.
DISH
| $4.69M | 0.01% |
1,222
+473
| +63% | +$16.8K |
|
|
713
PUT
PNC Financial Services
PNC
$99.5B
| $4.67M | 0.01% |
340
-479
| -58% | -$63.3K |
|
714
AbbVie
ABBV
$454B
| $4.67M | 0.01% |
+64,174
| New | +$5.04M |
|
715
Occidental Petroleum
OXY
$57.3B
| $4.65M | 0.01% |
92,532
+85,163
| +1,156% | +$4.79M |
|
|
SAGE
716
PUT
DELISTED
Sage Therapeutics
SAGE
| $4.65M | 0.01% |
254
+206
| +429% | +$35.1K |
|
717
CALL
Weibo
WB
$1.92B
| $4.65M | 0.01% |
1,067
+210
| +25% | +$11.8K |
|
718
CALL
Synopsys
SNPS
$71.5B
| $4.64M | 0.01% |
361
-57
| -14% | -$6.86K |
|
719
CALL
United States Oil Fund
USO
$2.5B
| $4.63M | 0.01% |
480
+3
| +0.6% | +$299 |
|
720
CALL
Motorola Solutions
MSI
$67.6B
| $4.62M | 0.01% |
277
+101
| +57% | +$15.2K |
|
|
721
PUT
Agilent Technologies
A
$39.5B
| $4.61M | 0.01% |
617
+211
| +52% | +$15.6K |
|
722
CALL
Marvell Technology
MRVL
$188B
| $4.6M | 0.01% |
1,928
+462
| +32% | +$10.8K |
|
723
PUT
Planet Fitness
PLNT
$4.29B
| $4.6M | 0.01% |
635
+8
| +1% | +$603 |
|
724
PUT
Cracker Barrel
CBRL
$1.16B
| $4.59M | 0.01% |
269
+124
| +86% | +$20.3K |
|
725
CALL
The Mosaic Company
MOS
$7.08B
| $4.59M | 0.01% |
1,834
+1,271
| +226% | +$31K |
|
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.