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 | |
|---|---|---|---|---|---|---|
3976
PUT
Western Alliance Bancorporation
WAL
$9.13B
| $557K | ﹤0.01% |
6,000
+5,956
| +13,536% | +$590K |
|
|
LTHM
3977
DELISTED
Livent Corporation
LTHM
| $557K | ﹤0.01% |
28,810
+13,961
| +94% | +$254K |
|
|
SAII
3978
DELISTED
Software Acquisition Group Inc. II Class A Common Stock
SAII
| $557K | ﹤0.01% |
55,994
+52,243
| +1,393% | +$522K |
|
3979
PUT
Houlihan Lokey
HLI
$10.2B
| $556K | ﹤0.01% |
+6,800
| New | +$492K |
|
|
HPP
3980
CALL
Hudson Pacific Properties
HPP
$765M
| $556K | ﹤0.01% |
2,857
+2,856
| +285,600% | +$565K |
|
3981
PUT
National Grid
NGG
$81.3B
| $556K | ﹤0.01% |
9,838
+9,541
| +3,212% | +$542K |
|
3982
CALL
Protalix BioTherapeutics
PLX
$188M
| $556K | ﹤0.01% |
291,100
+291,048
| +559,708% | +$1M |
|
3983
CALL
Beam Global
BEEM
$23.1M
| $555K | ﹤0.01% |
14,500
+14,355
| +9,900% | +$473K |
|
3984
CALL
Veru
VERU
$35.8M
| $555K | ﹤0.01% |
6,880
+6,795
| +7,994% | +$598K |
|
3985
PUT
AMC Global Media
AMCX
$451M
| $554K | ﹤0.01% |
+8,300
| New | +$458K |
|
3986
Brinker International
EAT
$8.5B
| $554K | ﹤0.01% |
8,968
+382
| +4% | +$24.2K |
|
|
AFMD
3987
DELISTED
Affimed
AFMD
| $553K | ﹤0.01% |
6,515
+2,264
| +53% | +$207K |
|
3988
PUT
Hilltop Holdings
HTH
$2.28B
| $553K | ﹤0.01% |
15,200
+15,046
| +9,770% | +$537K |
|
3989
CALL
Imperial Oil
IMO
$60.8B
| $553K | ﹤0.01% |
18,200
+18,085
| +15,726% | +$545K |
|
|
LGF.B
3990
PUT
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $553K | ﹤0.01% |
26,800
+26,432
| +7,183% | +$405K |
|
3991
Arcus Biosciences
RCUS
$3.4B
| $552K | ﹤0.01% |
+20,137
| New | +$575K |
|
3992
PUT
Red Rock Resorts
RRR
$3.87B
| $552K | ﹤0.01% |
13,000
+12,657
| +3,690% | +$500K |
|
|
APPH
3993
CALL
DELISTED
AppHarvest, Inc. Common Stock
APPH
| $552K | ﹤0.01% |
34,500
+32,741
| +1,861% | +$522K |
|
|
DAO
3994
CALL
Youdao
DAO
$1.93B
| $551K | ﹤0.01% |
23,900
+23,805
| +25,058% | +$576K |
|
3995
PUT
Equitable Holdings
EQH
$13.5B
| $551K | ﹤0.01% |
18,100
+17,966
| +13,407% | +$586K |
|
3996
CALL
FerroAtlántica
GSM
$628M
| $551K | ﹤0.01% |
90,100
+88,876
| +7,261% | +$415K |
|
3997
iShares MSCI Turkey ETF
TUR
$204M
| $551K | ﹤0.01% |
26,160
+21,213
| +429% | +$489K |
|
|
FLG
3998
Flagstar Bank National Association
FLG
$5.83B
| $551K | ﹤0.01% |
+16,688
| New | +$597K |
|
|
IS
3999
PUT
DELISTED
ironSource Ltd.
IS
| $551K | ﹤0.01% |
+52,500
| New | +$564K |
|
4000
MPLX
MPLX
$60.1B
| $550K | ﹤0.01% |
18,601
+8,577
| +86% | +$243K |
|
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.