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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
826
PUT
Hasbro
HAS
$12.4B
| $4.06M | 0.01% |
478
+412
| +624% | +$35.9K |
|
827
CALL
LCI Industries
LCII
$2.54B
| $4.06M | 0.01% |
529
+528
| +52,800% | +$41.8K |
|
828
CALL
W.W. Grainger
GWW
$64.6B
| $4.06M | 0.01% |
135
-95
| -41% | -$28.2K |
|
829
PUT
Bank OZK
OZK
$5.47B
| $4.05M | 0.01% |
1,397
+211
| +18% | +$6.39K |
|
830
PUT
Under Armour Class C
UA
$2.81B
| $4.04M | 0.01% |
2,030
+372
| +22% | +$7.03K |
|
831
PUT
iShares Silver Trust
SLV
$27.8B
| $4.04M | 0.01% |
2,847
-143
| -5% | -$2.09K |
|
832
CALL
Textron
TXT
$16.2B
| $4.04M | 0.01% |
797
+73
| +10% | +$3.77K |
|
833
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$3.45B
| $4.02M | 0.01% |
32,705
-66,284
| -67% | -$7.98M |
|
|
BKI
834
CALL
DELISTED
Black Knight, Inc. Common Stock
BKI
| $3.99M | 0.01% |
732
+513
| +234% | +$25.9K |
|
835
Vanguard FTSE Emerging Markets ETF
VWO
$119B
| $3.99M | 0.01% |
+93,848
| New | +$3.86M |
|
|
FL
836
CALL
DELISTED
Foot Locker
FL
| $3.99M | 0.01% |
658
-143
| -18% | -$8.33K |
|
|
VIAB
837
CALL
DELISTED
Viacom Inc. Class B
VIAB
| $3.98M | 0.01% |
1,420
+404
| +40% | +$11.6K |
|
838
PUT
Freeport-McMoran
FCX
$91.3B
| $3.97M | 0.01% |
3,078
-530
| -15% | -$6.41K |
|
839
PUT
Teva Pharmaceuticals
TEVA
$36.3B
| $3.97M | 0.01% |
2,530
-5,804
| -70% | -$102K |
|
|
DOCU
840
CALL
DocuSign
DOCU
$8.98B
| $3.96M | 0.01% |
765
+240
| +46% | +$12.2K |
|
841
PUT
IPG Photonics
IPGP
$4.09B
| $3.95M | 0.01% |
260
+31
| +14% | +$4.39K |
|
842
PUT
Cleveland-Cliffs
CLF
$6.25B
| $3.92M | 0.01% |
3,919
+1,990
| +103% | +$19.9K |
|
|
FLIR
843
CALL
DELISTED
FLIR Systems, Inc. (DE) Common Stock
FLIR
| $3.91M | 0.01% |
821
+503
| +158% | +$24.3K |
|
844
CALL
Reliance Steel & Aluminium
RS
$20.2B
| $3.9M | 0.01% |
432
+386
| +839% | +$32.2K |
|
845
PUT
AerCap
AER
$23.4B
| $3.9M | 0.01% |
837
+392
| +88% | +$17.7K |
|
846
PUT
Ventas
VTR
$47.6B
| $3.89M | 0.01% |
610
+229
| +60% | +$14.3K |
|
847
CALL
Dollar Tree
DLTR
$22.6B
| $3.89M | 0.01% |
370
-433
| -54% | -$42.5K |
|
848
PUT
The Mosaic Company
MOS
$7.08B
| $3.88M | 0.01% |
1,420
+939
| +195% | +$28.6K |
|
849
PUT
Bath & Body Works
BBWI
$3.9B
| $3.87M | 0.01% |
1,738
+948
| +120% | +$20.8K |
|
850
CALL
Cencora
COR
$59.4B
| $3.87M | 0.01% |
487
+373
| +327% | +$30K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.