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 | |
|---|---|---|---|---|---|---|
476
PUT
Blackstone
BX
$150B
| $18.5M | 0.02% |
190,200
+188,637
| +12,069% | +$16.8M |
|
|
X
477
DELISTED
US Steel
X
| $18.5M | 0.02% |
769,341
+323,353
| +73% | +$7.96M |
|
478
PUT
Alcoa
AA
$12.2B
| $18.3M | 0.02% |
496,800
+493,811
| +16,521% | +$18M |
|
479
PUT
Lemonade
LMND
$4.87B
| $18.3M | 0.02% |
166,900
+165,095
| +9,147% | +$15M |
|
480
PUT
Las Vegas Sands
LVS
$30B
| $18M | 0.02% |
+341,200
| New | +$19.7M |
|
481
CALL
Nokia
NOK
$57.4B
| $17.9M | 0.02% |
3,360,600
+3,347,311
| +25,189% | +$16.2M |
|
482
PUT
Fiverr
FVRR
$377M
| $17.9M | 0.02% |
73,700
+72,886
| +8,954% | +$15.1M |
|
483
PUT
Rio Tinto
RIO
$150B
| $17.7M | 0.02% |
211,400
+209,774
| +12,901% | +$18M |
|
484
Plug Power
PLUG
$3.11B
| $17.6M | 0.02% |
514,742
+198,612
| +63% | +$5.76M |
|
485
PUT
Altria Group
MO
$121B
| $17.6M | 0.02% |
368,700
+365,687
| +12,137% | +$18M |
|
486
PUT
Hilton Worldwide
HLT
$73.8B
| $17.6M | 0.02% |
145,700
+143,518
| +6,577% | +$17.9M |
|
|
SCHW
487
CALL
Charles Schwab
SCHW
$175B
| $17.5M | 0.02% |
+240,400
| New | +$17M |
|
488
CALL
Aon
AON
$75.2B
| $17.5M | 0.02% |
+73,200
| New | +$17.9M |
|
|
VMW
489
CALL
DELISTED
VMware, Inc
VMW
| $17.5M | 0.02% |
+109,200
| New | +$17.5M |
|
490
CALL
DuPont de Nemours
DD
$18.9B
| $17.5M | 0.02% |
179,728
+178,473
| +14,221% | +$17.9M |
|
491
CALL
RH
RH
$3.31B
| $17.4M | 0.02% |
25,700
+25,378
| +7,881% | +$16.5M |
|
|
PXD
492
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $17.4M | 0.02% |
107,300
+106,579
| +14,782% | +$16.7M |
|
493
CALL
Autodesk
ADSK
$43B
| $17.4M | 0.02% |
+59,700
| New | +$17M |
|
|
KFYP
494
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $17.4M | 0.02% |
274,700
+271,645
| +8,892% | +$8.59M |
|
495
CALL
SLB Ltd
SLB
$71.3B
| $17.3M | 0.02% |
540,900
+535,902
| +10,722% | +$16.5M |
|
496
CALL
Royal Bank of Canada
RY
$294B
| $17.2M | 0.02% |
169,800
+168,856
| +17,887% | +$16.7M |
|
497
PUT
Fortinet
FTNT
$114B
| $17.2M | 0.02% |
361,000
+359,915
| +33,172% | +$15.4M |
|
|
IPFF
498
PUT
DELISTED
iShares International Preferred Stock ETF
IPFF
| $17.1M | 0.02% |
326,600
+323,529
| +10,535% | +$5.58M |
|
499
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $17.1M | 0.02% |
84,900
+84,205
| +12,116% | +$17.6M |
|
|
WBA
500
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $17.1M | 0.02% |
325,000
+321,743
| +9,879% | +$17.3M |
|
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.