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 | Miscellaneous | 97.48% |
| 2 | Technology | 0.51% |
| 3 | Communication Services | 0.5% |
| 4 | Healthcare | 0.37% |
| 5 | Industrials | 0.31% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
551
CALL
Yum! Brands
YUM
$41.1B
| $6.62M | 0.02% |
598
-184
| -24% | -$19.1K |
|
552
CALL
BHP
BHP
$230B
| $6.61M | 0.02% |
1,276
+906
| +245% | +$43.8K |
|
553
CALL
Dow Inc
DOW
$21.3B
| $6.61M | 0.02% |
+1,341
| New | +$70.8K |
|
554
PUT
Vulcan Materials
VMC
$34B
| $6.6M | 0.02% |
481
+38
| +9% | +$4.85K |
|
555
PUT
Sinclair Inc
SBGI
$999M
| $6.6M | 0.02% |
1,231
+1,130
| +1,119% | +$57.3K |
|
556
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$370M
| $6.59M | 0.02% |
609
+272
| +81% | +$29.1K |
|
557
PUT
Capital One
COF
$135B
| $6.56M | 0.02% |
723
-725
| -50% | -$64.8K |
|
558
CALL
Mondelez International
MDLZ
$78.2B
| $6.53M | 0.02% |
1,212
-694
| -36% | -$36K |
|
559
PUT
Amphenol
APH
$204B
| $6.52M | 0.02% |
5,440
+3,344
| +160% | +$40.2K |
|
560
PUT
Cincinnati Financial
CINF
$26.3B
| $6.48M | 0.02% |
625
+607
| +3,372% | +$58.3K |
|
|
FRC
561
CALL
DELISTED
First Republic Bank
FRC
| $6.44M | 0.02% |
660
+434
| +192% | +$43.7K |
|
|
FISV
562
CALL
Fiserv Inc
FISV
$28.2B
| $6.42M | 0.02% |
704
+494
| +235% | +$43.3K |
|
563
Humana
HUM
$48.2B
| $6.41M | 0.02% |
24,176
+9,869
| +69% | +$2.5M |
|
|
APC
564
DELISTED
Anadarko Petroleum
APC
| $6.4M | 0.02% |
90,724
-8,519
| -9% | -$571K |
|
565
PUT
Uber
UBER
$155B
| $6.39M | 0.02% |
+1,379
| New | +$58.5K |
|
566
CALL
Sherwin-Williams
SHW
$81B
| $6.37M | 0.02% |
417
+90
| +28% | +$13.4K |
|
567
PUT
OSI Systems
OSIS
$3.25B
| $6.33M | 0.02% |
562
-162
| -22% | -$16.3K |
|
568
PUT
Toyota
TM
$233B
| $6.31M | 0.02% |
509
+100
| +24% | +$12.2K |
|
569
Delta Air Lines
DAL
$52.7B
| $6.3M | 0.02% |
111,008
+108,145
| +3,777% | +$6.06M |
|
570
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$738M
| $6.28M | 0.02% |
1,639
-249
| -13% | -$8.38K |
|
571
CALL
Genuine Parts
GPC
$19B
| $6.25M | 0.02% |
603
+205
| +52% | +$21.2K |
|
572
PUT
Williams Companies
WMB
$90.7B
| $6.24M | 0.02% |
2,226
+1,004
| +82% | +$27.9K |
|
573
PUT
Burlington
BURL
$16.7B
| $6.23M | 0.02% |
366
-291
| -44% | -$47.6K |
|
574
CALL
Pultegroup
PHM
$23.7B
| $6.19M | 0.02% |
1,958
+1,391
| +245% | +$43.4K |
|
575
CALL
American Electric Power
AEP
$67.8B
| $6.18M | 0.02% |
702
+603
| +609% | +$52K |
|
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 1,300 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 Miscellaneous at 97% of assets, up from 97% a quarter earlier, followed by Technology and Communication Services.
- 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 1,300 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.