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 | |
|---|---|---|---|---|---|---|
|
MAG
2076
CALL
DELISTED
MAG Silver
MAG
| $814K | ﹤0.01% |
1,061
+153
| +17% | +$1.49K |
|
2077
W.W. Grainger
GWW
$65.3B
| $813K | ﹤0.01% |
+3,273
| New | +$968K |
|
|
SWCH
2078
CALL
DELISTED
Switch, Inc. Class A Common Stock
SWCH
| $813K | ﹤0.01% |
564
-173
| -23% | -$2.63K |
|
2079
Churchill Downs
CHDN
$6.03B
| $812K | ﹤0.01% |
15,782
+13,238
| +520% | +$854K |
|
2080
PUT
Sabre
SABR
$656M
| $811K | ﹤0.01% |
1,369
+1,239
| +953% | +$20.7K |
|
|
ENDP
2081
CALL
DELISTED
Endo International plc
ENDP
| $811K | ﹤0.01% |
2,192
+1,327
| +153% | +$6.72K |
|
|
RP
2082
DELISTED
RealPage, Inc.
RP
| $811K | ﹤0.01% |
15,336
+8,893
| +138% | +$507K |
|
2083
PUT
New York Times
NYT
$11.6B
| $810K | ﹤0.01% |
264
+72
| +38% | +$2.47K |
|
|
RTN
2084
PUT
DELISTED
Raytheon Company
RTN
| $810K | ﹤0.01% |
274
-390
| -59% | -$77.2K |
|
2085
CALL
Church & Dwight Co
CHD
$23.1B
| $808K | ﹤0.01% |
126
+71
| +129% | +$5.04K |
|
2086
CALL
Public Service Enterprise Group
PEG
$39.8B
| $808K | ﹤0.01% |
180
+140
| +350% | +$7.56K |
|
2087
CALL
LendingTree
TREE
$544M
| $806K | ﹤0.01% |
44
+19
| +76% | +$5.38K |
|
2088
Invesco S&P 500 Low Volatility ETF
SPLV
$7.2B
| $805K | ﹤0.01% |
17,163
+7,088
| +70% | +$397K |
|
|
DISH
2089
CALL
DELISTED
DISH Network Corp.
DISH
| $805K | ﹤0.01% |
403
-435
| -52% | -$14.1K |
|
2090
F5
FFIV
$22.1B
| $803K | ﹤0.01% |
7,535
-1,391
| -16% | -$170K |
|
2091
CALL
Fastly Inc
FSLY
$3.17B
| $802K | ﹤0.01% |
423
+28
| +7% | +$579 |
|
|
MRO
2092
PUT
DELISTED
Marathon Oil Corporation
MRO
| $802K | ﹤0.01% |
2,438
+2,295
| +1,605% | +$21.2K |
|
2093
CALL
Appian
APPN
$1.74B
| $800K | ﹤0.01% |
199
+59
| +42% | +$2.74K |
|
|
HOLX
2094
PUT
DELISTED
Hologic
HOLX
| $800K | ﹤0.01% |
228
-361
| -61% | -$17.2K |
|
2095
PUT
Cooper Companies
COO
$13.7B
| $799K | ﹤0.01% |
116
-76
| -40% | -$6.19K |
|
|
BCLI
2096
CALL
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| $798K | ﹤0.01% |
115
+113
| +5,650% | +$8.82K |
|
2097
PUT
Devon Energy
DVN
$51.9B
| $798K | ﹤0.01% |
1,155
-371
| -24% | -$6.71K |
|
2098
PUT
OGE Energy
OGE
$10.3B
| $798K | ﹤0.01% |
260
+223
| +603% | +$9.02K |
|
2099
Cheesecake Factory
CAKE
$4.21B
| $797K | ﹤0.01% |
+46,674
| New | +$1.57M |
|
2100
CALL
DTE Energy
DTE
$31.1B
| $797K | ﹤0.01% |
99
+86
| +662% | +$8.73K |
|
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.