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 |
Apple
AAPL
|
+$34.8M |
| 2 |
Bausch Health
BHC
|
+$20.3M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$18.9M |
| 4 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$12.3M |
| 5 |
Amazon
AMZN
|
+$12.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.8M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$12.1M |
| 4 |
Netflix
NFLX
|
+$10.7M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 9.5% |
| 2 | Healthcare | 7.55% |
| 3 | Technology | 7.01% |
| 4 | Communication Services | 6.66% |
| 5 | Industrials | 5.76% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
BHI
476
DELISTED
Baker Hughes
BHI
| $445K | 0.03% |
+9,664
| New | +$495K |
|
|
YHOO
477
CALL
DELISTED
Yahoo Inc
YHOO
| $444K | 0.03% |
3,837
+518
| +16% | +$17.3K |
|
|
NVO
478
Novo Nordisk
NVO
$213B
| $442K | 0.03% |
+15,250
| New | +$422K |
|
479
CALL
TripAdvisor
TRIP
$1.57B
| $439K | 0.03% |
351
-117
| -25% | -$9.44K |
|
480
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $439K | 0.03% |
191
-82
| -30% | -$9.9K |
|
481
PUT
AutoZone
AZO
$47.7B
| $438K | 0.03% |
186
-76
| -29% | -$58K |
|
|
SKX
482
PUT
DELISTED
Skechers
SKX
| $438K | 0.03% |
627
-1,188
| -65% | -$39.7K |
|
483
United States Natural Gas Fund
UNG
$473M
| $438K | 0.03% |
3,162
-526
| -14% | -$79.4K |
|
484
CALL
Bank of America
BAC
$430B
| $437K | 0.03% |
3,823
-1,017
| -21% | -$17.2K |
|
485
PUT
Boeing
BA
$165B
| $436K | 0.03% |
2,525
-2,368
| -48% | -$341K |
|
486
ProShares Short QQQ
PSQ
$686M
| $436K | 0.03% |
1,671
-160
| -9% | -$42.2K |
|
|
ADMS
487
DELISTED
Adamas Pharmaceuticals
ADMS
| $432K | 0.03% |
+15,281
| New | +$257K |
|
|
ARG
488
CALL
DELISTED
Airgas Inc
ARG
| $430K | 0.03% |
517
+468
| +955% | +$53.9K |
|
|
JOYY
489
JOYY Inc
JOYY
$3.66B
| $429K | 0.03% |
6,882
-8,865
| -56% | -$527K |
|
|
QUNR
490
CALL
DELISTED
Qunar Cayman Islands Limited
QUNR
| $429K | 0.03% |
557
+255
| +84% | +$11K |
|
491
PUT
Amgen
AMGN
$201B
| $428K | 0.03% |
1,634
-72
| -4% | -$11.3K |
|
492
OSI Systems
OSIS
$3.53B
| $426K | 0.03% |
4,814
+2,556
| +113% | +$224K |
|
|
RHT
493
DELISTED
Red Hat Inc
RHT
| $423K | 0.03% |
+5,117
| New | +$406K |
|
494
Vishay Intertechnology
VSH
$6.26B
| $422K | 0.03% |
35,034
+34,554
| +7,199% | +$390K |
|
495
Applied Materials
AMAT
$447B
| $421K | 0.03% |
+22,561
| New | +$392K |
|
|
DVAX
496
DELISTED
Dynavax Technologies
DVAX
| $421K | 0.03% |
17,462
+9,836
| +129% | +$246K |
|
|
WFM
497
PUT
DELISTED
Whole Foods Market Inc
WFM
| $420K | 0.03% |
978
+25
| +3% | +$795 |
|
|
PCL
498
DELISTED
PLUM CREEK TIMBER CO (REIT)
PCL
| $419K | 0.03% |
8,781
+8,215
| +1,451% | +$373K |
|
499
PUT
JPMorgan Chase
JPM
$930B
| $413K | 0.03% |
3,478
+78
| +2% | +$5.08K |
|
500
PUT
lululemon athletica
LULU
$12.6B
| $413K | 0.03% |
1,750
+355
| +25% | +$17.9K |
|
Similar funds
Simplex Trading's Q4 2015 Portfolio in Review
As of Q4 2015, Simplex Trading held 7,008 positions worth $1.28B, down 6.4% from $1.36B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading's Q4 2015 filing shows 1,417 new, 1,993 increased, 1,803 reduced and 1,598 closed positions. Its largest new stake was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M. The largest sale was iShares Russell 2000 ETF, an estimated $27.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 9.5% of assets, up from 4.6% a quarter earlier, followed by Healthcare and Technology.
- Simplex Trading's largest Q4 2015 buy was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.
- Simplex Trading added most to Apple in Q4 2015, an estimated $34.8M increase.
- Simplex Trading's biggest Q4 2015 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $13.8M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q4 2015, selling an estimated $27.5M.
- Simplex Trading's ten largest holdings make up 19% of its $1.28B portfolio in Q4 2015.
- Simplex Trading opened 1,417 new positions and closed 1,598 in Q4 2015.
- Simplex Trading's portfolio value fell 6.4% quarter-over-quarter to $1.28B.
Based on Simplex Trading's 13F filing for Q4 2015, filed 20 Jan 2016.