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 | |
|---|---|---|---|---|---|---|
|
QLTB
5676
PUT
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $201K | ﹤0.01% |
1,500
+1,378
| +1,130% | +$185K |
|
|
CARM
5677
PUT
DELISTED
Carisma Therapeutics
CARM
| $200K | ﹤0.01% |
2,175
+2,115
| +3,525% | +$135K |
|
5678
PUT
Murphy USA
MUSA
$11.2B
| $200K | ﹤0.01% |
1,500
+1,499
| +149,900% | +$207K |
|
|
RTB
5679
PUT
RTB Digital
RTB
$214M
| $200K | ﹤0.01% |
+48
| New | +$202K |
|
5680
Vanguard Financials ETF
VFH
$13.5B
| $200K | ﹤0.01% |
2,215
+379
| +21% | +$34.3K |
|
|
VMEO
5681
PUT
DELISTED
Vimeo
VMEO
| $200K | ﹤0.01% |
+4,100
| New | +$189K |
|
|
INTZ
5682
CALL
DELISTED
INTRUSION INC NEW
INTZ
| $200K | ﹤0.01% |
+13,000
| New | +$200K |
|
5683
PUT
Alector
ALEC
$168M
| $199K | ﹤0.01% |
9,600
+9,495
| +9,043% | +$179K |
|
5684
CALL
PAVmed
PAVM
$35.4M
| $199K | ﹤0.01% |
69
+67
| +3,350% | +$158K |
|
|
SIFY
5685
CALL
Sify Technologies
SIFY
$1.06B
| $199K | ﹤0.01% |
9,183
+9,026
| +5,749% | +$177K |
|
5686
CALL
Veritone
VERI
$101M
| $199K | ﹤0.01% |
10,100
+9,993
| +9,339% | +$217K |
|
|
BPMP
5687
CALL
DELISTED
BP Midstream Partners LP Common Units representing Limited Partner Interests
BPMP
| $199K | ﹤0.01% |
13,800
+13,689
| +12,332% | +$190K |
|
|
CONE
5688
DELISTED
CyrusOne Inc Common Stock
CONE
| $199K | ﹤0.01% |
2,788
+2,186
| +363% | +$159K |
|
5689
PUT
AquaBounty Technologies
AQB
$4.66M
| $198K | ﹤0.01% |
1,850
+1,792
| +3,090% | +$206K |
|
|
ACH
5690
CALL
Accendra Health
ACH
$237M
| $198K | ﹤0.01% |
+4,700
| New | +$183K |
|
5691
ProShares UltraPro Short Dow 30
SDOW
$162M
| $198K | ﹤0.01% |
1,510
-639
| -30% | -$88.5K |
|
5692
PUT
Skywest
SKYW
$4.24B
| $198K | ﹤0.01% |
4,600
+4,546
| +8,419% | +$224K |
|
|
CURO
5693
DELISTED
CURO Group Holdings Corp.
CURO
| $198K | ﹤0.01% |
11,656
+2,923
| +33% | +$45.4K |
|
5694
Global X MSCI China Consumer Discretionary ETF
CHIQ
$133M
| $197K | ﹤0.01% |
5,573
-7,706
| -58% | -$258K |
|
5695
United States Copper Index Fund
CPER
$765M
| $197K | ﹤0.01% |
+7,545
| New | +$205K |
|
5696
EVgo
EVGO
$223M
| $197K | ﹤0.01% |
13,140
+7,167
| +120% | +$91.5K |
|
5697
PUT
InterDigital
IDCC
$7.87B
| $197K | ﹤0.01% |
+2,700
| New | +$200K |
|
5698
IDEX
IEX
$17B
| $197K | ﹤0.01% |
+896
| New | +$198K |
|
5699
CALL
Ocular Therapeutix
OCUL
$1.79B
| $197K | ﹤0.01% |
+13,900
| New | +$211K |
|
5700
PUT
Oceaneering
OII
$4.86B
| $197K | ﹤0.01% |
12,700
+12,654
| +27,509% | +$176K |
|
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.