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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
776
PUT
Harley-Davidson
HOG
$2.68B
| $4.48M | 0.01% |
1,245
+255
| +26% | +$8.74K |
|
777
CALL
WIX.com
WIX
$2.15B
| $4.46M | 0.01% |
382
-241
| -39% | -$33.5K |
|
778
PUT
Liberty Global Class C
LBTYK
$3.25B
| $4.46M | 0.01% |
1,817
+282
| +18% | +$7.34K |
|
779
PUT
Arista Networks
ANET
$219B
| $4.44M | 0.01% |
2,976
-800
| -21% | -$12.4K |
|
780
CALL
Dollar Tree
DLTR
$23.1B
| $4.44M | 0.01% |
389
-1,029
| -73% | -$108K |
|
781
CALL
Lumen
LUMN
$6.53B
| $4.44M | 0.01% |
3,558
+1,484
| +72% | +$17.6K |
|
782
State Street Utilities Select Sector SPDR ETF
XLU
$24.1B
| $4.44M | 0.01% |
+137,126
| New | +$4.23M |
|
|
KL
783
CALL
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $4.43M | 0.01% |
990
-8
| -0.8% | -$365 |
|
784
CALL
Ferrari
RACE
$63.3B
| $4.42M | 0.01% |
287
+46
| +19% | +$7.34K |
|
785
PUT
Global Payments
GPN
$22.1B
| $4.42M | 0.01% |
278
+179
| +181% | +$29.2K |
|
786
CALL
NetApp
NTAP
$32.9B
| $4.42M | 0.01% |
841
+144
| +21% | +$7.72K |
|
787
CALL
Haemonetics
HAE
$3.58B
| $4.41M | 0.01% |
+350
| New | +$44.4K |
|
788
PUT
Edison International
EIX
$30.7B
| $4.41M | 0.01% |
585
-193
| -25% | -$13.9K |
|
|
CMA
789
PUT
DELISTED
Comerica
CMA
| $4.4M | 0.01% |
667
+97
| +17% | +$6.42K |
|
790
CALL
Restaurant Brands International
QSR
$25.1B
| $4.39M | 0.01% |
617
+112
| +22% | +$8.26K |
|
791
PUT
Cardinal Health
CAH
$53.4B
| $4.39M | 0.01% |
930
+123
| +15% | +$5.62K |
|
|
NLSN
792
PUT
DELISTED
Nielsen Holdings plc
NLSN
| $4.38M | 0.01% |
2,059
+1,136
| +123% | +$25.1K |
|
793
CALL
HDFC Bank
HDB
$119B
| $4.37M | 0.01% |
1,532
+1,160
| +312% | +$33K |
|
|
WWE
794
PUT
DELISTED
World Wrestling Entertainment
WWE
| $4.35M | 0.01% |
612
-221
| -27% | -$15.8K |
|
|
795
Dollar Tree
DLTR
$23.1B
| $4.35M | 0.01% |
+38,087
| New | +$3.98M |
|
796
CALL
PagSeguro Digital
PAGS
$2.57B
| $4.35M | 0.01% |
939
-46
| -5% | -$2.14K |
|
797
PUT
ProShares UltraShort Health Care
RXD
$3.25M
| $4.34M | 0.01% |
409
+62
| +18% | +$5.46K |
|
|
798
PUT
WIX.com
WIX
$2.15B
| $4.34M | 0.01% |
372
-6
| -2% | -$834 |
|
799
PUT
Mondelez International
MDLZ
$77.7B
| $4.34M | 0.01% |
784
-1,958
| -71% | -$107K |
|
800
CALL
J.M. Smucker
SJM
$12.6B
| $4.33M | 0.01% |
394
+58
| +17% | +$6.46K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.