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 | |
|---|---|---|---|---|---|---|
1926
PUT
Regenxbio
RGNX
$623M
| $958K | ﹤0.01% |
296
+5
| +2% | +$208 |
|
|
APLS
1927
PUT
DELISTED
Apellis Pharmaceuticals
APLS
| $953K | ﹤0.01% |
356
+145
| +69% | +$5.15K |
|
1928
Flex
FLEX
$43.4B
| $952K | ﹤0.01% |
+150,930
| New | +$1.31M |
|
1929
Lennar Class A
LEN
$20.4B
| $952K | ﹤0.01% |
25,746
-21,817
| -46% | -$1.24M |
|
1930
CALL
Pampa Energía
PAM
$4.64B
| $952K | ﹤0.01% |
+843
| New | +$10.8K |
|
1931
Perrigo
PRGO
$1.4B
| $952K | ﹤0.01% |
+19,812
| New | +$1.06M |
|
1932
PUT
Xcel Energy
XEL
$51B
| $952K | ﹤0.01% |
158
+46
| +41% | +$3K |
|
|
CDK
1933
PUT
DELISTED
CDK Global, Inc.
CDK
| $952K | ﹤0.01% |
290
+176
| +154% | +$8.41K |
|
1934
CALL
Huntington Bancshares
HBAN
$35.1B
| $951K | ﹤0.01% |
1,159
+349
| +43% | +$4.29K |
|
1935
BioXcel Therapeutics
BTAI
$26.2M
| $950K | ﹤0.01% |
+2,659
| New | +$956K |
|
|
FLIR
1936
PUT
DELISTED
FLIR Systems, Inc. (DE) Common Stock
FLIR
| $950K | ﹤0.01% |
298
+273
| +1,092% | +$12.8K |
|
1937
CALL
Aramark
ARMK
$15B
| $948K | ﹤0.01% |
658
+161
| +32% | +$4.24K |
|
1938
Fair Isaac
FICO
$28.7B
| $948K | ﹤0.01% |
+3,082
| New | +$1.13M |
|
1939
Vanguard Real Estate ETF
VNQ
$39.9B
| $948K | ﹤0.01% |
+13,582
| New | +$1.19M |
|
1940
PUT
McCormick & Company Non-Voting
MKC
$13.4B
| $946K | ﹤0.01% |
134
+14
| +12% | +$1.09K |
|
1941
PUT
Bank OZK
OZK
$5.49B
| $946K | ﹤0.01% |
567
+152
| +37% | +$3.91K |
|
1942
PUT
Allstate
ALL
$66.9B
| $944K | ﹤0.01% |
103
-23
| -18% | -$2.5K |
|
1943
Direxion Daily Semiconductor Bear 3X ETF
SOXS
$1.74B
| – | – |
0
| – | – |
|
1944
iShares Preferred and Income Securities ETF
PFF
$13.2B
| $942K | ﹤0.01% |
+29,615
| New | +$1.06M |
|
1945
CALL
Service Corp International
SCI
$11.4B
| $942K | ﹤0.01% |
241
+86
| +55% | +$4K |
|
1946
Advance Auto Parts
AAP
$3.37B
| $939K | ﹤0.01% |
10,066
+249
| +3% | +$32.3K |
|
1947
Halliburton
HAL
$27.9B
| $939K | ﹤0.01% |
+137,145
| New | +$2.39M |
|
1948
CALL
AutoNation
AN
$6.97B
| $937K | ﹤0.01% |
334
+314
| +1,570% | +$13K |
|
1949
CALL
Xylem
XYL
$28.5B
| $937K | ﹤0.01% |
144
+101
| +235% | +$7.96K |
|
1950
PUT
Navient
NAVI
$774M
| $936K | ﹤0.01% |
1,236
+901
| +269% | +$10.8K |
|
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.