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 | |
|---|---|---|---|---|---|---|
|
TYNS
401
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $23.4M | 0.02% |
214,200
+212,208
| +10,653% | +$23.2M |
|
402
CALL
Workhorse Group
WKHS
$30.4M
| $23.4M | 0.02% |
469
+466
| +15,533% | +$17.3M |
|
|
STZ.B
403
CALL
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $23.3M | 0.02% |
99,600
+99,241
| +27,644% | +$23M |
|
404
PUT
Autodesk
ADSK
$43B
| $23.3M | 0.02% |
+79,700
| New | +$22.7M |
|
405
PUT
QuantumScape Corp
QS
$3.61B
| $23.2M | 0.02% |
791,600
+787,149
| +17,685% | +$25.5M |
|
406
PUT
ConocoPhillips
COP
$145B
| $23.1M | 0.02% |
+379,700
| New | +$21.2M |
|
407
PUT
Cleveland-Cliffs
CLF
$5.39B
| $23M | 0.02% |
1,066,300
+1,062,904
| +31,299% | +$20.9M |
|
408
CALL
BlackBerry
BB
$5.25B
| $22.9M | 0.02% |
+1,871,200
| New | +$19.6M |
|
409
PUT
Prudential Financial
PRU
$41.3B
| $22.8M | 0.02% |
222,200
+220,650
| +14,235% | +$22.5M |
|
410
PUT
Rocket Companies
RKT
$38B
| $22.7M | 0.02% |
1,171,800
+1,157,836
| +8,292% | +$23.4M |
|
411
PUT
Honeywell
HON
$73.8B
| $22.6M | 0.02% |
+109,389
| New | +$23.1M |
|
|
LOGC
412
CALL
DELISTED
ContextLogic
LOGC
| $22.6M | 0.02% |
57,197
+57,154
| +132,916% | +$20.3M |
|
413
PUT
Marathon Digital Holdings
MARA
$4.73B
| $22.5M | 0.02% |
718,400
+708,519
| +7,171% | +$22.5M |
|
414
State Street Technology Select Sector SPDR ETF
XLK
$117B
| $22.5M | 0.02% |
+304,822
| New | +$21.4M |
|
415
PUT
TAL Education Group
TAL
$5.73B
| $22.5M | 0.02% |
891,300
+889,494
| +49,252% | +$39.7M |
|
416
CALL
FuboTV Inc
FUBO
$265M
| $22.4M | 0.02% |
58,133
+57,569
| +10,207% | +$16.4M |
|
|
SHNY
417
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $22.3M | 0.02% |
972,800
+961,489
| +8,500% | +$22M |
|
418
CALL
Chegg
CHGG
$99.9M
| $22M | 0.02% |
264,200
+261,776
| +10,799% | +$21.7M |
|
419
PUT
Carvana
CVNA
$44.9B
| $21.9M | 0.02% |
+363,500
| New | +$19.8M |
|
420
Intel
INTC
$516B
| $21.8M | 0.02% |
388,672
+272,540
| +235% | +$16M |
|
|
BBBY
421
PUT
DELISTED
Bed Bath & Beyond Inc
BBBY
| $21.8M | 0.02% |
+653,700
| New | +$18.2M |
|
|
SCIU
422
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $21.6M | 0.02% |
621,200
+615,331
| +10,484% | +$21.4M |
|
|
423
CALL
Carvana
CVNA
$44.9B
| $21.5M | 0.02% |
+355,500
| New | +$19.3M |
|
424
PUT
lululemon athletica
LULU
$12.9B
| $21.4M | 0.02% |
58,700
+57,708
| +5,817% | +$19M |
|
425
CALL
Dell
DELL
$285B
| $21.4M | 0.02% |
423,603
+421,427
| +19,367% | +$21.1M |
|
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.