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 | |
|---|---|---|---|---|---|---|
|
CPLG
3801
PUT
DELISTED
CorePoint Lodging Inc. Common Stock
CPLG
| $629K | ﹤0.01% |
58,800
+58,798
| +2,939,900% | +$590K |
|
3802
Vanguard Total Bond Market
BND
$158B
| $628K | ﹤0.01% |
+7,322
| New | +$625K |
|
3803
CALL
Loews
L
$24.6B
| $628K | ﹤0.01% |
11,500
+11,421
| +14,457% | +$639K |
|
3804
Safe Bulkers
SB
$761M
| $628K | ﹤0.01% |
156,687
+3,681
| +2% | +$12.9K |
|
3805
CALL
SLM Corp
SLM
$4.74B
| $628K | ﹤0.01% |
+30,000
| New | +$591K |
|
3806
PUT
Unum
UNM
$14B
| $627K | ﹤0.01% |
22,100
+21,937
| +13,458% | +$645K |
|
|
TRIT
3807
PUT
DELISTED
Triterras, Inc. Class A Ordinary Shares
TRIT
| $627K | ﹤0.01% |
90,200
+88,861
| +6,636% | +$595K |
|
3808
Playtika
PLTK
$1.51B
| $626K | ﹤0.01% |
26,285
+4,886
| +23% | +$128K |
|
3809
Ventas
VTR
$47.7B
| $625K | ﹤0.01% |
10,960
+4,366
| +66% | +$244K |
|
|
VBIV
3810
CALL
DELISTED
VBI Vaccines, Inc. New Common Stock (Canada)
VBIV
| $625K | ﹤0.01% |
6,220
+6,182
| +16,268% | +$603K |
|
3811
Blink Charging
BLNK
$74.1M
| $624K | ﹤0.01% |
15,159
-7,718
| -34% | -$286K |
|
3812
Fabrinet
FN
$16.1B
| $624K | ﹤0.01% |
+6,519
| New | +$583K |
|
3813
CALL
Knowles
KN
$3.07B
| $623K | ﹤0.01% |
31,600
+31,391
| +15,020% | +$640K |
|
|
MITT
3814
CALL
TPG Mortgage Investment Trust
MITT
$230M
| $622K | ﹤0.01% |
+48,633
| New | +$607K |
|
|
CPLG
3815
CALL
DELISTED
CorePoint Lodging Inc. Common Stock
CPLG
| $622K | ﹤0.01% |
58,200
+58,137
| +92,281% | +$584K |
|
3816
Coty
COTY
$2.45B
| $621K | ﹤0.01% |
66,511
-165,476
| -71% | -$1.5M |
|
|
DNB
3817
CALL
DELISTED
Dun & Bradstreet
DNB
| $621K | ﹤0.01% |
29,100
+29,085
| +193,900% | +$651K |
|
3818
CALL
Marriott Vacations Worldwide
VAC
$3.52B
| $621K | ﹤0.01% |
3,900
+3,896
| +97,400% | +$667K |
|
3819
CALL
WillScot Mobile Mini Holdings
WSC
$4.66B
| $621K | ﹤0.01% |
22,300
+22,285
| +148,567% | +$640K |
|
3820
PUT
ABM Industries
ABM
$2.88B
| $620K | ﹤0.01% |
14,000
+13,907
| +14,954% | +$698K |
|
3821
CALL
TD Synnex
SNX
$19.8B
| $620K | ﹤0.01% |
5,100
+5,052
| +10,525% | +$621K |
|
3822
PUT
Xos
XOS
$28.3M
| $620K | ﹤0.01% |
2,080
+2,016
| +3,150% | +$600K |
|
|
NVO
3823
PUT
Novo Nordisk
NVO
$225B
| $619K | ﹤0.01% |
14,800
+14,606
| +7,529% | +$566K |
|
3824
Williams Companies
WMB
$85.8B
| $619K | ﹤0.01% |
23,319
+17,251
| +284% | +$442K |
|
3825
PUT
Beyond Air
XAIR
$3.93M
| $618K | ﹤0.01% |
+239
| New | +$523K |
|
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.