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 | |
|---|---|---|---|---|---|---|
6201
PUT
Biomerica
BMRA
$4.6M
| $143K | ﹤0.01% |
4,463
+4,419
| +10,043% | +$150K |
|
6202
PUT
Eastern Bankshares
EBC
$5.26B
| $143K | ﹤0.01% |
7,000
+6,974
| +26,823% | +$148K |
|
6203
Independence Realty Trust
IRT
$3.92B
| $143K | ﹤0.01% |
+7,862
| New | +$133K |
|
6204
Newmark Group
NMRK
$2.66B
| $143K | ﹤0.01% |
11,908
-4,462
| -27% | -$53.5K |
|
6205
CALL
ProQR Therapeutics
PRQR
$243M
| $143K | ﹤0.01% |
21,300
+20,729
| +3,630% | +$134K |
|
6206
Red Robin
RRGB
$145M
| $143K | ﹤0.01% |
+4,321
| New | +$147K |
|
|
WCN
6207
Waste Connections
WCN
$42.2B
| $143K | ﹤0.01% |
1,201
+80
| +7% | +$9.52K |
|
|
PVLA
6208
PUT
Palvella Therapeutics
PVLA
$1.99B
| $143K | ﹤0.01% |
+469
| New | +$103K |
|
|
MRTX
6209
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $143K | ﹤0.01% |
890
-802
| -47% | -$129K |
|
|
APRN
6210
CALL
DELISTED
Blue Apron Holdings, Inc. Class A Common Stock
APRN
| $143K | ﹤0.01% |
2,800
+2,758
| +6,567% | +$175K |
|
|
FTCV
6211
DELISTED
FinTech Acquisition Corp. V Class A Common Stock
FTCV
| $143K | ﹤0.01% |
+11,734
| New | +$136K |
|
6212
Cannae Holdings
CNNE
$639M
| $142K | ﹤0.01% |
+4,203
| New | +$157K |
|
6213
CALL
Empire State Realty Trust
ESRT
$872M
| $142K | ﹤0.01% |
11,900
+11,777
| +9,575% | +$138K |
|
6214
PUT
Flowers Foods
FLO
$1.49B
| $142K | ﹤0.01% |
5,900
+5,854
| +12,726% | +$142K |
|
6215
PUT
Geron
GERN
$828M
| $142K | ﹤0.01% |
+101,300
| New | +$147K |
|
|
LGMK
6216
PUT
DELISTED
LogicMark
LGMK
| $142K | ﹤0.01% |
+32
| New | +$147K |
|
|
YRD
6217
Yiren Digital
YRD
$97.1M
| $142K | ﹤0.01% |
23,698
-7,023
| -23% | -$30.1K |
|
|
GPP
6218
PUT
DELISTED
Green Plains Partners LP
GPP
| $142K | ﹤0.01% |
11,100
+10,969
| +8,373% | +$134K |
|
6219
PUT
Ameris Bancorp
ABCB
$5.85B
| $141K | ﹤0.01% |
2,800
+2,798
| +139,900% | +$150K |
|
6220
PUT
Allegro MicroSystems
ALGM
$7.73B
| $141K | ﹤0.01% |
5,100
+5,097
| +169,900% | +$133K |
|
6221
PUT
Apple Hospitality REIT
APLE
$3.9B
| $141K | ﹤0.01% |
9,300
+9,103
| +4,621% | +$141K |
|
6222
PUT
CEVA Inc
CEVA
$910M
| $141K | ﹤0.01% |
3,000
+2,969
| +9,577% | +$146K |
|
6223
Dorian LPG
LPG
$2.03B
| $141K | ﹤0.01% |
10,016
-6,334
| -39% | -$88.6K |
|
|
NOA
6224
North American Construction
NOA
$369M
| $141K | ﹤0.01% |
9,332
-8,794
| -49% | -$117K |
|
|
NOAH
6225
CALL
Noah Holdings
NOAH
$580M
| $141K | ﹤0.01% |
+3,000
| New | +$133K |
|
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.