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 | |
|---|---|---|---|---|---|---|
3776
PUT
Carter's
CRI
$1.45B
| $170K | ﹤0.01% |
26
+8
| +44% | +$770 |
|
3777
PUT
Genesis Energy
GEL
$1.81B
| $170K | ﹤0.01% |
435
+150
| +53% | +$2.07K |
|
3778
CALL
iRhythm Holdings
IRTC
$3.83B
| $170K | ﹤0.01% |
21
+19
| +950% | +$1.58K |
|
|
IPHI
3779
DELISTED
INPHI CORPORATION
IPHI
| $170K | ﹤0.01% |
2,151
-4,870
| -69% | -$379K |
|
3780
CALL
Advanced Energy
AEIS
$10.9B
| $169K | ﹤0.01% |
35
-9
| -20% | -$571 |
|
3781
CALL
Cars.com
CARS
$704M
| $169K | ﹤0.01% |
395
-1,022
| -72% | -$9.87K |
|
3782
CALL
Clearway Energy Class C
CWEN
$4.9B
| $169K | ﹤0.01% |
94
+59
| +169% | +$1.23K |
|
3783
GrafTech
EAF
$199M
| $169K | ﹤0.01% |
2,085
-8,205
| -80% | -$791K |
|
|
FOLD
3784
CALL
DELISTED
Amicus Therapeutics
FOLD
| $169K | ﹤0.01% |
183
-147
| -45% | -$1.4K |
|
3785
The RealReal
REAL
$1.41B
| $169K | ﹤0.01% |
24,202
+21,155
| +694% | +$288K |
|
|
DBD
3786
PUT
DELISTED
Diebold Nixdorf Incorporated
DBD
| $169K | ﹤0.01% |
481
+349
| +264% | +$2.96K |
|
|
SEE
3787
PUT
DELISTED
Sealed Air
SEE
| $168K | ﹤0.01% |
68
-70
| -51% | -$2.29K |
|
3788
CALL
NCR Voyix
VYX
$1.18B
| $168K | ﹤0.01% |
155
-300
| -66% | -$5.15K |
|
|
OIL
3789
DELISTED
iPath Series B S&P GSCI Crude Oil ETN
OIL
| $168K | ﹤0.01% |
+40,764
| New | +$386K |
|
3790
PUT
Cheniere Energy
CQP
$30.7B
| $167K | ﹤0.01% |
62
-20
| -24% | -$684 |
|
3791
CALL
CryoPort
CYRX
$773M
| $167K | ﹤0.01% |
98
-192
| -66% | -$3.36K |
|
3792
Diamondback Energy
FANG
$53.8B
| $167K | ﹤0.01% |
+6,404
| New | +$403K |
|
3793
CALL
Logitech
LOGI
$15.7B
| $167K | ﹤0.01% |
39
-52
| -57% | -$2.25K |
|
3794
PUT
NMI Holdings
NMIH
$3.32B
| $167K | ﹤0.01% |
144
+143
| +14,300% | +$3.78K |
|
3795
CALL
Nomad Foods
NOMD
$1.71B
| $167K | ﹤0.01% |
90
+76
| +543% | +$1.48K |
|
3796
Weyerhaeuser
WY
$17.6B
| $167K | ﹤0.01% |
+9,892
| New | +$260K |
|
|
LCI
3797
DELISTED
Lannett Company, Inc.
LCI
| $167K | ﹤0.01% |
6,034
-9,404
| -61% | -$316K |
|
|
WIFI
3798
DELISTED
Boingo Wireless, Inc.
WIFI
| $167K | ﹤0.01% |
15,782
+12,410
| +368% | +$144K |
|
|
PS
3799
PUT
DELISTED
Pluralsight, Inc. Class A Common Stock
PS
| $167K | ﹤0.01% |
153
+44
| +40% | +$732 |
|
3800
Iridium Communications
IRDM
$4.81B
| $166K | ﹤0.01% |
7,460
+3,598
| +93% | +$93.1K |
|
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.