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 | |
|---|---|---|---|---|---|---|
2276
CALL
Upbound Group
UPBD
$1.19B
| $1.11M | ﹤0.01% |
192
+125
| +187% | +$6.54K |
|
|
NTR
2277
CALL
DELISTED
NEW YORK MORTGAGE TRUST INC
NTR
| $1.11M | ﹤0.01% |
2,476
+660
| +36% | +$295K |
|
2278
CALL
Regency Centers
REG
$15B
| $1.1M | ﹤0.01% |
195
-34
| -15% | -$1.77K |
|
2279
Brookfield Renewable
BEPC
$6.12B
| $1.1M | ﹤0.01% |
+23,568
| New | +$1.2M |
|
2280
CALL
KB Financial Group
KB
$41.2B
| $1.1M | ﹤0.01% |
223
+188
| +537% | +$7.82K |
|
2281
PUT
Blackbaud
BLKB
$1.5B
| $1.1M | ﹤0.01% |
155
-40
| -21% | -$2.76K |
|
2282
CALL
e.l.f. Beauty
ELF
$4.56B
| $1.1M | ﹤0.01% |
410
-331
| -45% | -$8.26K |
|
2283
Equinox Gold
EQX
$7.32B
| $1.1M | ﹤0.01% |
137,655
-41,406
| -23% | -$383K |
|
2284
Outdoor Holding Co
POWW
$239M
| $1.1M | ﹤0.01% |
+185,495
| New | +$1.19M |
|
2285
CALL
Darden Restaurants
DRI
$22.5B
| $1.1M | ﹤0.01% |
773
+308
| +66% | +$40.5K |
|
2286
CALL
OGE Energy
OGE
$10.3B
| $1.1M | ﹤0.01% |
339
+254
| +299% | +$8.01K |
|
|
HAAC
2287
PUT
DELISTED
Health Assurance Acquisition Corp. Class A Common Stock
HAAC
| $1.1M | ﹤0.01% |
+1,073
| New | +$12.7K |
|
|
MILE
2288
CALL
DELISTED
Metromile, Inc. Common Stock
MILE
| $1.1M | ﹤0.01% |
1,066
+733
| +220% | +$11.2K |
|
|
2289
PUT
Darden Restaurants
DRI
$22.5B
| $1.09M | ﹤0.01% |
771
-67
| -8% | -$8.82K |
|
2290
NovoCure
NVCR
$2.04B
| $1.09M | ﹤0.01% |
8,260
+7,994
| +3,005% | +$1.26M |
|
|
PING
2291
DELISTED
Ping Identity Holding Corp.
PING
| $1.09M | ﹤0.01% |
49,760
+38,832
| +355% | +$1.09M |
|
2292
AudioCodes
AUDC
$244M
| $1.09M | ﹤0.01% |
40,406
+39,325
| +3,638% | +$1.17M |
|
2293
Upwork
UPWK
$1.09B
| $1.09M | ﹤0.01% |
+24,362
| New | +$1.12M |
|
|
FUV
2294
PUT
DELISTED
Arcimoto, Inc. Common Stock
FUV
| $1.09M | ﹤0.01% |
41
+10
| +32% | +$3.99K |
|
2295
ProShares Short 20+ Year Treasury ETF
TBF
$84.9M
| $1.09M | ﹤0.01% |
60,151
+13,155
| +28% | +$225K |
|
|
FINV
2296
FinVolution Group
FINV
$1.12B
| $1.09M | ﹤0.01% |
155,339
+143,806
| +1,247% | +$765K |
|
2297
Cullen/Frost Bankers
CFR
$10.3B
| $1.09M | ﹤0.01% |
9,999
+220
| +2% | +$22.7K |
|
2298
CALL
Brinker International
EAT
$8.02B
| $1.09M | ﹤0.01% |
153
-90
| -37% | -$6.02K |
|
2299
AB InBev
BUD
$158B
| $1.09M | ﹤0.01% |
17,291
+17,251
| +43,128% | +$1.11M |
|
2300
Humana
HUM
$46.7B
| $1.08M | ﹤0.01% |
2,590
-889
| -26% | -$355K |
|
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.