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 | |
|---|---|---|---|---|---|---|
501
PUT
BlackBerry
BB
$5.25B
| $17M | 0.02% |
+1,394,500
| New | +$14.6M |
|
502
PUT
Logitech
LOGI
$15B
| $17M | 0.02% |
+140,800
| New | +$16.5M |
|
503
CALL
Dropbox
DBX
$6.69B
| $17M | 0.02% |
561,600
+554,841
| +8,209% | +$15.2M |
|
504
PUT
AB InBev
BUD
$160B
| $17M | 0.02% |
235,600
+233,860
| +13,440% | +$17.1M |
|
505
Snap
SNAP
$7.52B
| $16.9M | 0.02% |
247,570
+243,267
| +5,653% | +$14.6M |
|
506
PUT
NextEra Energy
NEE
$186B
| $16.9M | 0.02% |
230,000
+227,978
| +11,275% | +$17.1M |
|
507
PUT
Medtronic
MDT
$105B
| $16.8M | 0.02% |
135,700
+134,971
| +18,515% | +$16.9M |
|
|
BBBY
508
CALL
DELISTED
Bed Bath & Beyond Inc
BBBY
| $16.8M | 0.02% |
+505,700
| New | +$14.1M |
|
|
WBA
509
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $16.8M | 0.02% |
319,400
+316,437
| +10,680% | +$17M |
|
510
PUT
Kroger
KR
$35.3B
| $16.8M | 0.02% |
438,600
+432,623
| +7,238% | +$16.3M |
|
511
CALL
Sherwin-Williams
SHW
$78.9B
| $16.6M | 0.02% |
61,000
+60,862
| +44,103% | +$16.7M |
|
512
CALL
Regeneron Pharmaceuticals
REGN
$68.3B
| $16.6M | 0.02% |
+29,700
| New | +$15M |
|
513
CALL
Blackrock
BLK
$164B
| $16.5M | 0.02% |
18,900
+18,737
| +11,495% | +$15.8M |
|
|
RDS.A
514
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $16.5M | 0.02% |
412,100
+410,256
| +22,248% | +$16.3M |
|
515
PUT
United Rentals
URI
$64.8B
| $16.5M | 0.02% |
51,700
+51,469
| +22,281% | +$16.6M |
|
516
American Airlines Group
AAL
$9.78B
| $16.4M | 0.02% |
774,048
+143,168
| +23% | +$3.24M |
|
517
SPDR Gold Trust
GLD
$133B
| $16.4M | 0.02% |
99,064
+78,759
| +388% | +$13.4M |
|
|
GAP
518
PUT
The Gap Inc
GAP
$7.07B
| $16.4M | 0.02% |
486,200
+481,214
| +9,651% | +$15.9M |
|
519
CALL
Caesars Entertainment
CZR
$6.1B
| $16.3M | 0.02% |
157,200
+156,411
| +19,824% | +$15.8M |
|
520
PUT
MongoDB
MDB
$24.5B
| $16.2M | 0.02% |
44,800
+44,434
| +12,140% | +$13.7M |
|
521
CALL
Devon Energy
DVN
$51.8B
| $16.2M | 0.02% |
+554,500
| New | +$14.3M |
|
522
PUT
Analog Devices
ADI
$188B
| $16.1M | 0.02% |
+93,600
| New | +$15M |
|
523
PUT
Diamondback Energy
FANG
$57.1B
| $16.1M | 0.02% |
171,600
+170,523
| +15,833% | +$14.1M |
|
524
PUT
Dell
DELL
$285B
| $16.1M | 0.02% |
318,442
+316,341
| +15,057% | +$15.9M |
|
525
CALL
Occidental Petroleum
OXY
$57.2B
| $16M | 0.02% |
603,500
+600,512
| +20,097% | +$16.1M |
|
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.