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 | |
|---|---|---|---|---|---|---|
3626
PUT
Ceragon Networks
CRNT
$195M
| $710K | ﹤0.01% |
188,500
+185,733
| +6,712% | +$658K |
|
3627
CALL
First Bancorp
FBP
$4.44B
| $710K | ﹤0.01% |
59,600
+59,476
| +47,965% | +$733K |
|
3628
iShares US Aerospace & Defense ETF
ITA
$14.4B
| $710K | ﹤0.01% |
+6,486
| New | +$698K |
|
3629
CALL
Middleby
MIDD
$6.18B
| $710K | ﹤0.01% |
+4,100
| New | +$699K |
|
3630
CALL
Old Dominion Freight Line
ODFL
$47.4B
| $710K | ﹤0.01% |
5,600
+5,306
| +1,805% | +$680K |
|
|
ML
3631
PUT
DELISTED
MoneyLion Inc.
ML
| $710K | ﹤0.01% |
2,380
+2,251
| +1,745% | +$671K |
|
3632
iShares US Technology ETF
IYW
$23.1B
| $709K | ﹤0.01% |
+7,141
| New | +$666K |
|
|
VBTX
3633
CALL
DELISTED
Veritex Holdings
VBTX
| $708K | ﹤0.01% |
20,000
+19,624
| +5,219% | +$686K |
|
3634
PUT
Iridium Communications
IRDM
$4.79B
| $707K | ﹤0.01% |
17,700
+17,430
| +6,456% | +$677K |
|
3635
CALL
Parker-Hannifin
PH
$125B
| $706K | ﹤0.01% |
2,300
+2,144
| +1,374% | +$664K |
|
|
TRTN
3636
PUT
DELISTED
Triton International Limited
TRTN
| $706K | ﹤0.01% |
13,500
+13,338
| +8,233% | +$707K |
|
|
EVRI
3637
CALL
DELISTED
Everi Holdings
EVRI
| $705K | ﹤0.01% |
28,300
+27,620
| +4,062% | +$521K |
|
3638
CALL
Huntington Bancshares
HBAN
$35B
| $705K | ﹤0.01% |
49,500
+48,553
| +5,127% | +$743K |
|
3639
Invesco Leisure and Entertainment ETF
PEJ
$261M
| $705K | ﹤0.01% |
13,506
+12,902
| +2,136% | +$617K |
|
3640
TD Synnex
SNX
$19.3B
| $705K | ﹤0.01% |
5,791
+4,986
| +619% | +$613K |
|
3641
CALL
Barrett Business Services
BBSI
$1.03B
| $704K | ﹤0.01% |
+38,800
| New | +$710K |
|
|
DFTX
3642
Definium Therapeutics
DFTX
$5.49B
| $704K | ﹤0.01% |
+13,618
| New | +$715K |
|
3643
PUT
Federal Realty Investment Trust
FRT
$11B
| $703K | ﹤0.01% |
6,000
+5,859
| +4,155% | +$665K |
|
3644
PUT
Shoals Technologies Group
SHLS
$1.47B
| $702K | ﹤0.01% |
19,800
+19,728
| +27,400% | +$595K |
|
3645
Vermilion Energy
VET
$1.59B
| $702K | ﹤0.01% |
80,282
+54,655
| +213% | +$428K |
|
3646
Cinemark Holdings
CNK
$4.07B
| $701K | ﹤0.01% |
+31,974
| New | +$709K |
|
3647
Edison International
EIX
$31.1B
| $701K | ﹤0.01% |
12,135
+8,299
| +216% | +$483K |
|
3648
CALL
LPL Financial
LPLA
$27.2B
| $701K | ﹤0.01% |
5,200
+5,147
| +9,711% | +$749K |
|
|
TWCT
3649
PUT
DELISTED
TWC Tech Holdings II Corp. Class A Common Stock
TWCT
| $701K | ﹤0.01% |
+70,600
| New | +$700K |
|
3650
PUT
Ashland
ASH
$3.13B
| $700K | ﹤0.01% |
8,000
+7,920
| +9,900% | +$713K |
|
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.