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 | |
|---|---|---|---|---|---|---|
3251
PUT
LivePerson
LPSN
$20.8M
| $910K | ﹤0.01% |
960
+955
| +19,100% | +$805K |
|
|
REGI
3252
PUT
DELISTED
Renewable Energy Group, Inc.
REGI
| $910K | ﹤0.01% |
14,600
+14,460
| +10,329% | +$902K |
|
|
AMRN
3253
PUT
Amarin Corp
AMRN
$290M
| $909K | ﹤0.01% |
+10,385
| New | +$1.02M |
|
3254
PUT
Live Oak Bancshares
LOB
$1.95B
| $908K | ﹤0.01% |
15,400
+15,375
| +61,500% | +$965K |
|
3255
CALL
Globus Medical
GMED
$10.6B
| $907K | ﹤0.01% |
11,700
+11,313
| +2,923% | +$804K |
|
|
MDLA
3256
CALL
DELISTED
Medallia, Inc.
MDLA
| $907K | ﹤0.01% |
26,900
+26,640
| +10,246% | +$766K |
|
3257
PUT
MSCI
MSCI
$41.5B
| $906K | ﹤0.01% |
1,700
+1,648
| +3,169% | +$786K |
|
3258
CALL
Astronics
ATRO
$3.47B
| $905K | ﹤0.01% |
62,040
+62,039
| +6,203,900% | +$900K |
|
3259
Eaton
ETN
$155B
| $905K | ﹤0.01% |
+6,109
| New | +$880K |
|
3260
CALL
State Street
STT
$50.7B
| $905K | ﹤0.01% |
11,000
+10,756
| +4,408% | +$908K |
|
3261
CALL
LiveRamp
RAMP
$2.3B
| $904K | ﹤0.01% |
19,300
+19,293
| +275,614% | +$928K |
|
|
UXIN
3262
PUT
Uxin Ltd
UXIN
$354M
| $903K | ﹤0.01% |
2,347
+2,336
| +21,236% | +$705K |
|
3263
CALL
Wyndham Hotels & Resorts
WH
$5.58B
| $903K | ﹤0.01% |
12,500
+12,229
| +4,513% | +$903K |
|
3264
PUT
YPF
YPF
$20B
| $903K | ﹤0.01% |
193,000
+192,529
| +40,877% | +$865K |
|
|
EGIO
3265
CALL
DELISTED
Edgio, Inc. Common Stock
EGIO
| $903K | ﹤0.01% |
7,168
+7,140
| +25,500% | +$942K |
|
3266
CALL
Healthpeak Properties
DOC
$15.5B
| $902K | ﹤0.01% |
27,100
+26,463
| +4,154% | +$888K |
|
3267
CALL
Vanguard Total Bond Market
BND
$158B
| $901K | ﹤0.01% |
10,500
+10,192
| +3,309% | +$869K |
|
3268
PUT
Magnolia Oil & Gas
MGY
$5.53B
| $901K | ﹤0.01% |
57,700
+57,421
| +20,581% | +$738K |
|
|
ACCD
3269
PUT
DELISTED
Accolade Inc
ACCD
| $901K | ﹤0.01% |
16,600
+16,428
| +9,551% | +$798K |
|
3270
CALL
Actinium Pharmaceuticals
ATNM
$26.8M
| $900K | ﹤0.01% |
+113,900
| New | +$894K |
|
3271
PUT
Knight Transportation
KNX
$11.5B
| $900K | ﹤0.01% |
19,800
+19,542
| +7,574% | +$933K |
|
3272
iShares MSCI Germany ETF
EWG
$1.55B
| $899K | ﹤0.01% |
25,989
-10,194
| -28% | -$358K |
|
3273
Teucrium Soybean Fund
SOYB
$62.1M
| $899K | ﹤0.01% |
37,956
-39,911
| -51% | -$914K |
|
3274
Toro Company
TTC
$9.01B
| $897K | ﹤0.01% |
8,168
+7,613
| +1,372% | +$837K |
|
|
POSH
3275
CALL
DELISTED
Poshmark, Inc. Class A Common Stock
POSH
| $897K | ﹤0.01% |
18,800
+18,678
| +15,310% | +$801K |
|
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.