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 | |
|---|---|---|---|---|---|---|
|
ABMD
501
PUT
DELISTED
Abiomed Inc
ABMD
| $7.58M | 0.02% |
291
-274
| -48% | -$72.7K |
|
502
PUT
J.M. Smucker
SJM
$12.4B
| $7.57M | 0.02% |
657
-167
| -20% | -$20.4K |
|
503
CALL
First Solar
FSLR
$22.1B
| $7.57M | 0.02% |
1,152
+247
| +27% | +$14.9K |
|
504
CALL
Becton Dickinson
BDX
$42.1B
| $7.54M | 0.02% |
306
+230
| +303% | +$53.4K |
|
505
PUT
Lumen
LUMN
$6.73B
| $7.51M | 0.02% |
6,390
-1,185
| -16% | -$13.3K |
|
|
PPLI
506
PUT
People Inc
PPLI
$3.14B
| $7.5M | 0.02% |
1,930
-308
| -14% | -$12.3K |
|
|
STMP
507
CALL
DELISTED
Stamps.com, Inc.
STMP
| $7.5M | 0.02% |
1,657
+619
| +60% | +$35.5K |
|
|
AMRN
508
CALL
Amarin Corp
AMRN
$285M
| $7.49M | 0.02% |
193
-85
| -31% | -$31.1K |
|
509
CALL
Phillips 66
PSX
$83B
| $7.48M | 0.02% |
800
+29
| +4% | +$2.6K |
|
510
CALL
Wayfair
W
$10.9B
| $7.47M | 0.02% |
512
-6
| -1% | -$902 |
|
511
ProShares Ultra VIX Short-Term Futures ETF
UVXY
$254M
| $7.46M | 0.02% |
+95
| New | +$8.38M |
|
512
PUT
Martin Marietta Materials
MLM
$32.8B
| $7.43M | 0.02% |
323
+186
| +136% | +$40.3K |
|
513
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$107M
| $7.42M | 0.02% |
2,637
-475
| -15% | -$10.7K |
|
514
CALL
Bausch Health
BHC
$1.66B
| $7.37M | 0.02% |
2,921
+856
| +41% | +$20.3K |
|
515
CALL
General Mills
GIS
$19B
| $7.34M | 0.02% |
1,398
-255
| -15% | -$13.2K |
|
|
B
516
CALL
Barrick Mining
B
$62.3B
| $7.33M | 0.02% |
4,647
+1,602
| +53% | +$21.3K |
|
|
STI
517
CALL
DELISTED
SunTrust Banks, Inc.
STI
| $7.27M | 0.02% |
1,157
+9
| +0.8% | +$566 |
|
518
CALL
T-Mobile US
TMUS
$184B
| $7.2M | 0.02% |
971
-259
| -21% | -$19.2K |
|
519
CALL
Herbalife
HLF
$1.22B
| $7.18M | 0.02% |
1,680
+1,056
| +169% | +$50K |
|
520
CALL
Essex Property Trust
ESS
$18.8B
| $7.18M | 0.02% |
246
+71
| +41% | +$20.5K |
|
521
PUT
BHP
BHP
$212B
| $7.18M | 0.02% |
1,384
-791
| -36% | -$38.2K |
|
522
CALL
TJX Companies
TJX
$170B
| $7.17M | 0.02% |
1,357
-164
| -11% | -$8.72K |
|
523
CALL
Fastenal
FAST
$53B
| $7.13M | 0.02% |
4,376
+1,036
| +31% | +$17.1K |
|
524
CALL
GSK
GSK
$102B
| $7.1M | 0.02% |
1,419
+390
| +38% | +$19.6K |
|
525
CALL
Kimberly-Clark
KMB
$35.6B
| $7.09M | 0.02% |
532
-109
| -17% | -$14.1K |
|
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.