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 |
iShares Russell 2000 ETF
IWM
|
+$67.5M |
| 2 |
Palantir
PLTR
|
+$64.7M |
| 3 |
PARA
Paramount Global Class B
PARA
|
+$31.5M |
| 4 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$30.7M |
| 5 |
Carnival Corporation Ltd
CCL
|
+$25.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
Tesla
TSLA
|
+$53.7M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$38.1M |
| 4 |
Invesco QQQ Trust
QQQ
|
+$37.6M |
| 5 |
AutoZone
AZO
|
+$28.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.65% |
| 2 | Consumer Discretionary | 0.49% |
| 3 | Healthcare | 0.32% |
| 4 | Financials | 0.3% |
| 5 | Industrials | 0.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1151
Direxion Daily Financial Bull 3x ETF
FAS
$2.4B
| $3.27M | 0.01% |
35,969
+8,625
| +32% | +$668K |
|
|
BBBY
1152
CALL
Bed Bath & Beyond
BBBY
$473M
| $3.27M | 0.01% |
+542
| New | +$36.7K |
|
1153
Phillips 66
PSX
$82.9B
| $3.26M | 0.01% |
39,957
+34,174
| +591% | +$2.68M |
|
1154
CALL
Vroom Inc
VRM
$36.9M
| $3.25M | 0.01% |
10
+1
| +11% | +$3.24K |
|
1155
SPDR Gold Trust
GLD
$131B
| $3.25M | 0.01% |
20,305
-3,650
| -15% | -$613K |
|
1156
PUT
Prologis
PLD
$138B
| $3.24M | 0.01% |
+306
| New | +$31.2K |
|
|
XLRN
1157
PUT
DELISTED
Acceleron Pharma
XLRN
| $3.24M | 0.01% |
239
+213
| +819% | +$27.5K |
|
|
KL
1158
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $3.24M | 0.01% |
95,877
+38,171
| +66% | +$1.41M |
|
1159
CALL
SoFi Technologies
SOFI
$21.1B
| $3.23M | 0.01% |
1,883
+1,782
| +1,764% | +$35.2K |
|
1160
PUT
Sun Life Financial
SLF
$45.6B
| $3.23M | 0.01% |
638
+636
| +31,800% | +$31.1K |
|
1161
PUT
CenterPoint Energy
CNP
$29.1B
| $3.22M | 0.01% |
1,423
-165
| -10% | -$3.52K |
|
|
MOMO
1162
PUT
Hello Group
MOMO
$869M
| $3.22M | 0.01% |
2,186
-175
| -7% | -$2.83K |
|
|
1163
CALL
Sun Life Financial
SLF
$45.6B
| $3.22M | 0.01% |
637
+516
| +426% | +$25.3K |
|
|
APPH
1164
CALL
DELISTED
AppHarvest, Inc. Common Stock
APPH
| $3.22M | 0.01% |
1,759
+1,594
| +966% | +$40.9K |
|
1165
CALL
Autohome
ATHM
$2.43B
| $3.22M | 0.01% |
345
+324
| +1,543% | +$36K |
|
1166
Credit Acceptance
CACC
$6B
| $3.21M | 0.01% |
8,924
+7,374
| +476% | +$2.67M |
|
|
1167
PUT
SoFi Technologies
SOFI
$21.1B
| $3.21M | 0.01% |
1,872
+1,519
| +430% | +$30K |
|
|
IPOF
1168
DELISTED
Social Capital Hedosophia Holdings Corp. VI
IPOF
| $3.2M | 0.01% |
299,051
+148,863
| +99% | +$2M |
|
|
CALY
1169
PUT
Callaway Golf Company
CALY
$3.26B
| $3.19M | 0.01% |
1,194
+158
| +15% | +$4.47K |
|
1170
CALL
National Grid
NGG
$82.7B
| $3.19M | 0.01% |
609
+522
| +600% | +$27.2K |
|
1171
PUT
Principal Financial Group
PFG
$23.6B
| $3.18M | 0.01% |
531
+361
| +212% | +$20.1K |
|
1172
PUT
Wabtec
WAB
$51.1B
| $3.18M | 0.01% |
402
+82
| +26% | +$6.36K |
|
1173
VF Corp
VFC
$6.68B
| $3.18M | 0.01% |
39,769
+2,086
| +6% | +$169K |
|
1174
PUT
Ralph Lauren
RL
$22.2B
| $3.18M | 0.01% |
258
-664
| -72% | -$75.7K |
|
1175
AdvisorShares Pure US Cannabis ETF
MSOS
$864M
| $3.17M | 0.01% |
74,876
+62,622
| +511% | +$2.89M |
|
Similar funds
Simplex Trading's Q1 2021 Portfolio in Review
As of Q1 2021, Simplex Trading held 10,706 positions worth $55.7B, down 28% from $77.2B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading withdrew a net $23.5B in Q1 2021, closing 1,706 positions and reducing 3,151 holdings. Its most notable exit was Alphabet (Google) Class C, an estimated $38.1M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.65% of assets, up from 0.37% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Pfizer worth $16.8M.
- Simplex Trading's largest Q1 2021 buy was Pfizer: 464,628 shares worth $16.8M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q1 2021, an estimated $67.5M increase.
- Simplex Trading's biggest Q1 2021 reduction was Amazon, cutting an estimated $66M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2021, selling an estimated $38.1M.
- Simplex Trading's ten largest holdings make up 43% of its $55.7B portfolio in Q1 2021.
- Simplex Trading opened 2,258 new positions and closed 1,706 in Q1 2021.
- Simplex Trading's portfolio value fell 28% quarter-over-quarter to $55.7B.
Based on Simplex Trading's 13F filing for Q1 2021, filed 26 Apr 2021.