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 |
SPDR Gold Trust
GLD
|
+$31.6M |
| 2 |
iShares Silver Trust
SLV
|
+$28.1M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.1M |
| 4 |
JPMorgan Chase
JPM
|
+$24.5M |
| 5 |
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
|
+$24M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$51.6M |
| 2 |
Amazon
AMZN
|
+$47.4M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$44.7M |
| 4 |
Netflix
NFLX
|
+$38.3M |
| 5 |
NVIDIA
NVDA
|
+$31.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Healthcare | 0.33% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.16% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1901
PUT
MACOM Technology Solutions
MTSI
$20.4B
| $980K | ﹤0.01% |
518
+473
| +1,051% | +$12K |
|
1902
Autodesk
ADSK
$44.3B
| $979K | ﹤0.01% |
+6,278
| New | +$1.15M |
|
1903
PUT
International Flavors & Fragrances
IFF
$19.4B
| $979K | ﹤0.01% |
96
-413
| -81% | -$51.4K |
|
1904
PUT
Tower Semiconductor
TSEM
$26.4B
| $979K | ﹤0.01% |
615
+245
| +66% | +$5.1K |
|
1905
PUT
Voya Financial
VOYA
$8.94B
| $977K | ﹤0.01% |
241
+72
| +43% | +$3.93K |
|
1906
CALL
Synchrony
SYF
$23.7B
| $973K | ﹤0.01% |
605
-371
| -38% | -$10.8K |
|
|
AUY
1907
CALL
DELISTED
Yamana Gold, Inc.
AUY
| $973K | ﹤0.01% |
3,539
+2,837
| +404% | +$10.7K |
|
|
UNVR
1908
DELISTED
Univar Solutions Inc.
UNVR
| $971K | ﹤0.01% |
90,599
+90,233
| +24,654% | +$1.67M |
|
|
SINA
1909
PUT
DELISTED
Sina Corp
SINA
| $971K | ﹤0.01% |
305
-45
| -13% | -$1.66K |
|
1910
Lear
LEA
$7.19B
| $970K | ﹤0.01% |
+11,948
| New | +$1.38M |
|
|
XEC
1911
DELISTED
CIMAREX ENERGY CO
XEC
| $970K | ﹤0.01% |
57,670
+54,021
| +1,480% | +$1.94M |
|
|
MYOK
1912
CALL
DELISTED
MyoKardia, Inc. Common Stock
MYOK
| $970K | ﹤0.01% |
207
+126
| +156% | +$8.07K |
|
1913
PUT
Fastenal
FAST
$54B
| $968K | ﹤0.01% |
620
+38
| +7% | +$669 |
|
1914
CALL
Ligand Pharmaceuticals
LGND
$6.02B
| $967K | ﹤0.01% |
213
-484
| -69% | -$27.4K |
|
|
CLR
1915
CALL
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $964K | ﹤0.01% |
1,262
+1,006
| +393% | +$22.4K |
|
1916
CALL
FIVE9
FIVN
$1.77B
| $963K | ﹤0.01% |
126
+17
| +16% | +$1.21K |
|
1917
PUT
Saia
SAIA
$11.3B
| $963K | ﹤0.01% |
131
+128
| +4,267% | +$11.2K |
|
1918
PUT
DraftKings
DKNG
$11.4B
| $960K | ﹤0.01% |
+778
| New | +$11.1K |
|
1919
CALL
Invesco
IVZ
$13.3B
| $960K | ﹤0.01% |
1,058
-563
| -35% | -$8.56K |
|
1920
Unilever
UL
$131B
| $960K | ﹤0.01% |
16,881
+2,192
| +15% | +$138K |
|
|
GBT
1921
PUT
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $960K | ﹤0.01% |
188
+92
| +96% | +$6.16K |
|
1922
CALL
American Homes 4 Rent
AMH
$12B
| $958K | ﹤0.01% |
+413
| New | +$10.9K |
|
1923
Liberty Global Class A
LBTYA
$3.31B
| $958K | ﹤0.01% |
58,049
-15,779
| -21% | -$311K |
|
1924
ServiceNow
NOW
$102B
| $958K | ﹤0.01% |
+16,725
| New | +$1.05M |
|
1925
CALL
Nexstar Media Group
NXST
$5.6B
| $958K | ﹤0.01% |
166
-20
| -11% | -$2.12K |
|
Similar funds
Simplex Trading's Q1 2020 Portfolio in Review
As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
- Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
- Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
- Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
- Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.
Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.