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 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3751
PUT
Exelixis
EXEL
$14.1B
| $652K | ﹤0.01% |
+35,800
| New | +$835K |
|
3752
NewtekOne
NEWT
$427M
| $652K | ﹤0.01% |
18,675
+17,219
| +1,183% | +$541K |
|
3753
Senseonics Holdings Inc
SENS
$255M
| $652K | ﹤0.01% |
8,500
-4,083
| -32% | -$207K |
|
3754
PUT
ING
ING
$95.2B
| $650K | ﹤0.01% |
49,100
+48,001
| +4,368% | +$629K |
|
3755
CALL
Invesco Actively Managed Exch-Traded Commodity Fd Tr Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF
PDBC
$6.2B
| $650K | ﹤0.01% |
32,400
+31,836
| +5,645% | +$605K |
|
3756
CALL
TFS Financial
TFSL
$5.16B
| $649K | ﹤0.01% |
32,000
+31,897
| +30,968% | +$664K |
|
3757
Direxion Daily Small Cap Bear 3x ETF
TZA
$245M
| $647K | ﹤0.01% |
+2,260
| New | +$711K |
|
|
AL
3758
PUT
DELISTED
Air Lease Corp
AL
| $646K | ﹤0.01% |
15,500
+15,427
| +21,133% | +$717K |
|
3759
PUT
Semtech
SMTC
$10.4B
| $646K | ﹤0.01% |
9,400
+9,396
| +234,900% | +$621K |
|
3760
PUT
Sportsman's Warehouse
SPWH
$44.9M
| $646K | ﹤0.01% |
+36,400
| New | +$644K |
|
3761
PUT
Takeda Pharmaceutical
TAK
$56B
| $646K | ﹤0.01% |
38,400
+37,380
| +3,665% | +$636K |
|
|
PPD
3762
DELISTED
PPD, Inc. Common Stock
PPD
| $646K | ﹤0.01% |
+14,022
| New | +$633K |
|
3763
PUT
Cathay General Bancorp
CATY
$4.24B
| $645K | ﹤0.01% |
16,400
+16,397
| +546,567% | +$675K |
|
3764
CALL
Thomson Reuters
TRI
$44.8B
| $645K | ﹤0.01% |
6,169
+6,159
| +61,590% | +$617K |
|
|
SAII
3765
PUT
DELISTED
Software Acquisition Group Inc. II Class A Common Stock
SAII
| $645K | ﹤0.01% |
64,900
+64,565
| +19,273% | +$645K |
|
|
BCLI
3766
CALL
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| $643K | ﹤0.01% |
11,287
+11,164
| +9,076% | +$596K |
|
3767
CALL
iRhythm Holdings
IRTC
$3.85B
| $643K | ﹤0.01% |
9,700
+9,623
| +12,497% | +$763K |
|
3768
CALL
nVent Electric
NVT
$22.9B
| $643K | ﹤0.01% |
20,600
+20,573
| +76,196% | +$634K |
|
|
HTT
3769
CALL
High Templar Tech Ltd
HTT
$379M
| $643K | ﹤0.01% |
267,200
+265,680
| +17,479% | +$568K |
|
3770
PUT
A.O. Smith
AOS
$8.8B
| $641K | ﹤0.01% |
8,900
+8,874
| +34,131% | +$612K |
|
3771
PUT
BCE
BCE
$20.3B
| $641K | ﹤0.01% |
13,000
+12,944
| +23,114% | +$627K |
|
3772
PUT
Energy Fuels
UUUU
$2.83B
| $641K | ﹤0.01% |
106,000
+103,985
| +5,161% | +$638K |
|
3773
CALL
Zedge
ZDGE
$39.7M
| $640K | ﹤0.01% |
34,800
+34,738
| +56,029% | +$486K |
|
|
ELME
3774
PUT
Elme Communities
ELME
$143M
| $639K | ﹤0.01% |
27,800
+27,751
| +56,635% | +$653K |
|
3775
PUT
WEX
WEX
$6.18B
| $639K | ﹤0.01% |
3,300
+3,250
| +6,500% | +$666K |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.