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 | |
|---|---|---|---|---|---|---|
|
CMRC
1601
Commerce.com Inc Series 1
CMRC
$224M
| $3.2M | ﹤0.01% |
49,239
+39,805
| +422% | +$2.25M |
|
1602
PUT
Waste Management
WM
$95.9B
| $3.19M | ﹤0.01% |
22,800
+22,296
| +4,424% | +$3.08M |
|
1603
ProShares Ultra Bloomberg Crude Oil
UCO
$443M
| $3.19M | ﹤0.01% |
163,252
+14,804
| +10% | +$242K |
|
1604
CALL
Digital Realty Trust
DLR
$73.7B
| $3.19M | ﹤0.01% |
21,200
+21,078
| +17,277% | +$3.19M |
|
1605
PUT
Burlington
BURL
$22B
| $3.19M | ﹤0.01% |
+9,900
| New | +$3.15M |
|
1606
CALL
Jabil
JBL
$32.8B
| $3.18M | ﹤0.01% |
54,800
+54,654
| +37,434% | +$3.01M |
|
1607
CALL
Insulet
PODD
$11.3B
| $3.18M | ﹤0.01% |
11,600
+11,549
| +22,645% | +$3.14M |
|
1608
PUT
Kinross Gold
KGC
$28.5B
| $3.18M | ﹤0.01% |
+500,500
| New | +$3.72M |
|
1609
PUT
H&R Block
HRB
$5.18B
| $3.17M | ﹤0.01% |
135,200
+133,672
| +8,748% | +$3.16M |
|
1610
Bunge Global
BG
$23.6B
| $3.17M | ﹤0.01% |
+40,595
| New | +$3.43M |
|
1611
PUT
The Greenbrier Companies
GBX
$1.61B
| $3.17M | ﹤0.01% |
72,700
+72,637
| +115,297% | +$3.36M |
|
1612
CALL
NMI Holdings
NMIH
$3.25B
| $3.17M | ﹤0.01% |
140,900
+140,840
| +234,733% | +$3.36M |
|
1613
PUT
Herbalife
HLF
$1.23B
| $3.16M | ﹤0.01% |
60,000
+59,585
| +14,358% | +$2.96M |
|
1614
CALL
PVH
PVH
$3.71B
| $3.16M | ﹤0.01% |
+29,400
| New | +$3.23M |
|
1615
CALL
MasTec
MTZ
$26.7B
| $3.16M | ﹤0.01% |
29,800
+29,639
| +18,409% | +$3.22M |
|
|
NBIS
1616
PUT
Nebius Group N.V.
NBIS
$47.7B
| $3.15M | ﹤0.01% |
+44,600
| New | +$2.93M |
|
1617
PUT
Brinker International
EAT
$8.02B
| $3.15M | ﹤0.01% |
51,000
+50,873
| +40,057% | +$3.22M |
|
1618
PUT
BlueLinx
BXC
$455M
| $3.15M | ﹤0.01% |
+62,700
| New | +$3.08M |
|
|
TMPO
1619
CALL
DELISTED
Tempo Automation Holdings, Inc. Common Stock
TMPO
| $3.15M | ﹤0.01% |
316,300
+315,124
| +26,796% | +$3.15M |
|
1620
PUT
Melco Resorts & Entertainment
MLCO
$2.1B
| $3.14M | ﹤0.01% |
+189,800
| New | +$3.44M |
|
1621
Dell
DELL
$283B
| $3.14M | ﹤0.01% |
62,179
-27,703
| -31% | -$1.39M |
|
1622
CALL
QuidelOrtho
QDEL
$1.09B
| $3.14M | ﹤0.01% |
24,500
+24,405
| +25,689% | +$2.87M |
|
1623
PUT
ProShares Ultra S&P500
SSO
$7.82B
| $3.13M | ﹤0.01% |
175,600
+174,168
| +12,163% | +$4.93M |
|
1624
Lemonade
LMND
$4.62B
| $3.13M | ﹤0.01% |
28,610
-3,974
| -12% | -$361K |
|
1625
CALL
Iovance Biotherapeutics
IOVA
$2.23B
| $3.13M | ﹤0.01% |
+120,200
| New | +$3.12M |
|
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.