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 | |
|---|---|---|---|---|---|---|
376
PUT
Newmont
NEM
$102B
| $25.8M | 0.02% |
+407,100
| New | +$27.3M |
|
377
PUT
Tilray
TLRY
$514M
| $25.8M | 0.02% |
158,410
+157,612
| +19,751% | +$27.7M |
|
378
CALL
Electronic Arts
EA
$52.4B
| $25.7M | 0.02% |
+178,800
| New | +$25.4M |
|
379
PUT
D.R. Horton
DHI
$40.4B
| $25.6M | 0.02% |
283,400
+281,580
| +15,471% | +$26.4M |
|
|
380
Micron Technology
MU
$1.08T
| $25.4M | 0.02% |
299,098
+271,788
| +995% | +$22.9M |
|
381
PUT
Li Auto
LI
$12B
| $25.2M | 0.02% |
720,600
+714,574
| +11,858% | +$16.7M |
|
382
CALL
XPeng
XPEV
$12.3B
| $25.1M | 0.02% |
564,300
+559,385
| +11,381% | +$19.1M |
|
383
CALL
S&P Global
SPGI
$127B
| $25M | 0.02% |
60,900
+60,280
| +9,723% | +$23.2M |
|
384
PUT
Abbott
ABT
$175B
| $25M | 0.02% |
215,300
+213,904
| +15,323% | +$24.9M |
|
385
PUT
Capital One
COF
$124B
| $25M | 0.02% |
+161,300
| New | +$24.3M |
|
386
CALL
Novavax
NVAX
$1.3B
| $24.7M | 0.02% |
116,400
+114,744
| +6,929% | +$21M |
|
387
CALL
ProShares Ultra Bloomberg Natural Gas
BOIL
$422M
| $24.7M | 0.02% |
3,911
+3,906
| +78,120% | +$19.8M |
|
|
B
388
PUT
Barrick Mining
B
$62.8B
| $24.5M | 0.02% |
+1,183,200
| New | +$26.7M |
|
389
CALL
Clorox
CLX
$11.6B
| $24.4M | 0.02% |
135,900
+134,927
| +13,867% | +$24.6M |
|
390
CALL
Rocket Companies
RKT
$38B
| $24.4M | 0.02% |
1,262,000
+1,247,144
| +8,395% | +$25.2M |
|
391
CALL
First Solar
FSLR
$22.4B
| $24.3M | 0.02% |
268,100
+266,484
| +16,490% | +$21.1M |
|
392
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $24.2M | 0.02% |
+425,300
| New | +$10.4M |
|
393
Direxion Daily S&P 500 Bull 3x ETF
SPXL
$6.82B
| $24.2M | 0.02% |
226,745
+34,395
| +18% | +$3.39M |
|
394
PUT
Fastly Inc
FSLY
$3.2B
| $24.1M | 0.02% |
404,000
+401,376
| +15,296% | +$22.8M |
|
395
PUT
PNC Financial Services
PNC
$101B
| $24M | 0.02% |
125,900
+125,148
| +16,642% | +$23.5M |
|
396
CALL
Blackstone
BX
$150B
| $24M | 0.02% |
247,000
+245,178
| +13,457% | +$21.8M |
|
397
PUT
Bristol-Myers Squibb
BMY
$124B
| $24M | 0.02% |
358,800
+353,319
| +6,446% | +$23M |
|
|
398
CALL
Tilray
TLRY
$514M
| $23.8M | 0.02% |
138,310
+136,831
| +9,252% | +$24M |
|
|
399
PUT
First Solar
FSLR
$22.4B
| $23.6M | 0.02% |
261,300
+259,178
| +12,214% | +$20.5M |
|
400
PUT
Nucor
NUE
$53.7B
| $23.6M | 0.02% |
246,000
+244,611
| +17,611% | +$22.9M |
|
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.