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 | |
|---|---|---|---|---|---|---|
5526
CALL
Evolent Health
EVH
$348M
| $221K | ﹤0.01% |
+10,500
| New | +$210K |
|
5527
CALL
Fidus Investment
FDUS
$749M
| $221K | ﹤0.01% |
13,000
+12,960
| +32,400% | +$220K |
|
5528
CALL
Fossil Group
FOSL
$293M
| $221K | ﹤0.01% |
15,500
+15,329
| +8,964% | +$202K |
|
|
MAXN
5529
DELISTED
Maxeon Solar Technologies
MAXN
| $221K | ﹤0.01% |
+103
| New | +$194K |
|
5530
CALL
Microvast
MVST
$269M
| $221K | ﹤0.01% |
259,300
+256,204
| +8,275% | +$3.03M |
|
5531
CALL
OR Royalties Inc
OR
$5.58B
| $221K | ﹤0.01% |
16,200
+16,119
| +19,900% | +$215K |
|
5532
PUT
ThredUp
TDUP
$746M
| $221K | ﹤0.01% |
+7,600
| New | +$164K |
|
|
EQOS
5533
PUT
DELISTED
EQONEX LIMITED Ordinary Shares
EQOS
| $221K | ﹤0.01% |
33,800
+33,771
| +116,452% | +$235K |
|
5534
PUT
Genco Shipping & Trading
GNK
$1.11B
| $220K | ﹤0.01% |
11,700
+11,578
| +9,490% | +$179K |
|
5535
Loop Industries
LOOP
$35.3M
| $220K | ﹤0.01% |
+17,874
| New | +$174K |
|
5536
CALL
SFL Corp
SFL
$1.64B
| $220K | ﹤0.01% |
+28,800
| New | +$236K |
|
5537
CALL
Semtech
SMTC
$11B
| $220K | ﹤0.01% |
3,200
+3,118
| +3,802% | +$206K |
|
5538
PUT
Trane Technologies
TT
$101B
| $220K | ﹤0.01% |
1,200
+1,056
| +733% | +$188K |
|
|
VRNT
5539
DELISTED
Verint Systems
VRNT
| $220K | ﹤0.01% |
+4,882
| New | +$226K |
|
|
ZUO
5540
PUT
DELISTED
Zuora, Inc.
ZUO
| $220K | ﹤0.01% |
12,800
+12,650
| +8,433% | +$202K |
|
|
NMRD
5541
DELISTED
Nemaura Medical, Inc. Common Stock
NMRD
| $220K | ﹤0.01% |
21,329
+13,921
| +188% | +$133K |
|
|
DENN
5542
PUT
DELISTED
Denny's
DENN
| $219K | ﹤0.01% |
13,300
+13,187
| +11,670% | +$231K |
|
5543
CALL
Fomento Económico Mexicano
FMX
$43.6B
| $219K | ﹤0.01% |
2,600
+2,502
| +2,553% | +$205K |
|
5544
PUT
Itron
ITRI
$4.36B
| $219K | ﹤0.01% |
2,200
+2,110
| +2,344% | +$196K |
|
5545
PUT
Offerpad Solutions
OPAD
$18.3M
| $219K | ﹤0.01% |
147
+141
| +2,350% | +$210K |
|
5546
PUT
Rackspace Technology
RXT
$1.05B
| $219K | ﹤0.01% |
11,200
+10,960
| +4,567% | +$243K |
|
5547
CALL
TransUnion
TRU
$15.1B
| $219K | ﹤0.01% |
2,000
+1,972
| +7,043% | +$206K |
|
5548
PUT
Toro Company
TTC
$8.75B
| $219K | ﹤0.01% |
2,000
+1,987
| +15,285% | +$218K |
|
|
CAJ
5549
PUT
DELISTED
Canon, Inc.
CAJ
| $219K | ﹤0.01% |
9,700
+9,600
| +9,600% | +$226K |
|
|
SAIL
5550
PUT
DELISTED
SailPoint Technologies Holdings, Inc. Common Stock
SAIL
| $219K | ﹤0.01% |
4,300
+4,163
| +3,039% | +$200K |
|
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.