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 | |
|---|---|---|---|---|---|---|
|
PBFX
2951
CALL
DELISTED
PBF LOGISTICS LP
PBFX
| $1.1M | ﹤0.01% |
74,200
+73,867
| +22,182% | +$1.12M |
|
|
VZIO
2952
PUT
DELISTED
VIZIO Holding Corp.
VZIO
| $1.1M | ﹤0.01% |
40,900
+40,845
| +74,264% | +$960K |
|
2953
CALL
Sally Beauty Holdings
SBH
$1.43B
| $1.1M | ﹤0.01% |
50,000
+49,696
| +16,347% | +$1.05M |
|
2954
CALL
Wingstop
WING
$3.68B
| $1.1M | ﹤0.01% |
+7,000
| New | +$1.01M |
|
2955
Cenovus Energy
CVE
$52.5B
| $1.1M | ﹤0.01% |
115,079
+52,161
| +83% | +$442K |
|
2956
ProShares UltraPro Short QQQ
SQQQ
$2.1B
| $1.1M | ﹤0.01% |
+965
| New | +$1.32M |
|
2957
Cameco
CCJ
$39.2B
| $1.1M | ﹤0.01% |
57,413
-17,677
| -24% | -$334K |
|
2958
CALL
Envista
NVST
$4.33B
| $1.1M | ﹤0.01% |
25,500
+25,485
| +169,900% | +$1.11M |
|
2959
Sabesp
SBS
$19.8B
| $1.1M | ﹤0.01% |
767,249
+122,013
| +19% | +$182K |
|
2960
ProShares Ultra Financials
UYG
$828M
| $1.1M | ﹤0.01% |
17,831
-1,769
| -9% | -$107K |
|
|
AY
2961
CALL
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $1.1M | ﹤0.01% |
29,600
+29,497
| +28,638% | +$1.09M |
|
|
SCR
2962
PUT
DELISTED
Score Media and Gaming Inc. Class A Subordinate Voting Shares
SCR
| $1.1M | ﹤0.01% |
55,200
+55,192
| +689,900% | +$1.04M |
|
2963
CALL
Pool Corp
POOL
$6.73B
| $1.1M | ﹤0.01% |
2,400
+2,382
| +13,233% | +$1M |
|
|
FL
2964
DELISTED
Foot Locker
FL
| $1.1M | ﹤0.01% |
17,836
-31,145
| -64% | -$1.88M |
|
2965
CALL
Village Farms International
VFF
$244M
| $1.1M | ﹤0.01% |
102,700
+102,417
| +36,190% | +$1.08M |
|
|
MIC
2966
CALL
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $1.1M | ﹤0.01% |
28,700
+28,439
| +10,896% | +$1M |
|
|
FTCV
2967
CALL
DELISTED
FinTech Acquisition Corp. V Class A Common Stock
FTCV
| $1.1M | ﹤0.01% |
+90,000
| New | +$1.04M |
|
|
ETWO
2968
PUT
DELISTED
E2open Parent Holdings
ETWO
| $1.1M | ﹤0.01% |
96,000
+95,625
| +25,500% | +$1.1M |
|
|
API
2969
CALL
Agora
API
$329M
| $1.09M | ﹤0.01% |
26,100
+25,783
| +8,133% | +$1.19M |
|
2970
PUT
Beam Therapeutics
BEAM
$2.61B
| $1.09M | ﹤0.01% |
8,500
+8,437
| +13,392% | +$672K |
|
|
VTLE
2971
PUT
DELISTED
Vital Energy
VTLE
| $1.09M | ﹤0.01% |
11,800
+11,673
| +9,191% | +$602K |
|
2972
PUT
Avantor
AVTR
$7.95B
| $1.09M | ﹤0.01% |
30,800
+30,352
| +6,775% | +$982K |
|
2973
Franklin Resources
BEN
$17.4B
| $1.09M | ﹤0.01% |
34,154
+1,679
| +5% | +$54.4K |
|
|
SPTN
2974
PUT
DELISTED
SpartanNash
SPTN
| $1.09M | ﹤0.01% |
56,600
+55,726
| +6,376% | +$1.11M |
|
|
TPGY
2975
CALL
DELISTED
TPG Pace Beneficial Finance Corp.
TPGY
| $1.09M | ﹤0.01% |
84,900
+83,769
| +7,407% | +$1.21M |
|
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.