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 | |
|---|---|---|---|---|---|---|
|
POM
326
DELISTED
PEPCO HOLDINGS, INC.
POM
| $652K | 0.05% |
25,086
+14,244
| +131% | +$373K |
|
327
PUT
UnitedHealth
UNH
$385B
| $650K | 0.05% |
2,501
-167
| -6% | -$19.5K |
|
328
Allstate
ALL
$65.5B
| $649K | 0.05% |
10,460
-11,623
| -53% | -$723K |
|
329
Eaton
ETN
$161B
| $649K | 0.05% |
12,474
+1,985
| +19% | +$107K |
|
330
Expeditors International
EXPD
$23B
| $648K | 0.05% |
14,389
+7,753
| +117% | +$376K |
|
331
CALL
McKesson
MCK
$96.5B
| $642K | 0.05% |
299
-126
| -30% | -$23.8K |
|
332
Harley-Davidson
HOG
$2.79B
| $639K | 0.05% |
14,089
+2,799
| +25% | +$138K |
|
|
MBLY
333
PUT
DELISTED
Mobileye N.V.
MBLY
| $637K | 0.05% |
953
-19
| -2% | -$849 |
|
334
iShares MSCI Spain ETF
EWP
$1.96B
| $636K | 0.05% |
22,512
-6,200
| -22% | -$190K |
|
335
Whirlpool
WHR
$2.31B
| $635K | 0.05% |
+4,326
| New | +$671K |
|
|
SPLS
336
DELISTED
Staples Inc
SPLS
| $634K | 0.05% |
+66,989
| New | +$786K |
|
|
STJ
337
DELISTED
St Jude Medical
STJ
| $633K | 0.05% |
10,258
-2,738
| -21% | -$173K |
|
338
3M
MMM
$87.5B
| $631K | 0.05% |
+5,011
| New | +$644K |
|
|
JO
339
DELISTED
iPath Bloomberg Coffee Subindex Total Return ETN due June 24, 2038
JO
| $631K | 0.05% |
32,076
+20,446
| +176% | +$399K |
|
340
PUT
Blackstone
BX
$152B
| $628K | 0.05% |
1,276
-319
| -20% | -$10.2K |
|
341
PUT
ATI
ATI
$27.3B
| $626K | 0.05% |
279
+34
| +14% | +$468 |
|
342
Vanguard S&P 500 ETF
VOO
$967B
| $623K | 0.05% |
+3,335
| New | +$628K |
|
343
CALL
PayPal
PYPL
$49.4B
| $621K | 0.05% |
1,345
-812
| -38% | -$28.6K |
|
344
Knowles
KN
$3.32B
| $620K | 0.05% |
+46,543
| New | +$794K |
|
345
CALL
ExxonMobil
XOM
$650B
| $618K | 0.05% |
3,693
-2,337
| -39% | -$187K |
|
|
SLH
346
DELISTED
SOLERA HOLDINGS, INC. COM
SLH
| $618K | 0.05% |
11,273
-15,579
| -58% | -$846K |
|
|
NSM
347
DELISTED
Nationstar Mortgage Holdings
NSM
| $617K | 0.05% |
+46,189
| New | +$614K |
|
|
PPLC
348
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $616K | 0.05% |
3,685
+3,356
| +1,020% | +$87.6K |
|
349
Toll Brothers
TOL
$13.7B
| $613K | 0.05% |
18,427
+15,068
| +449% | +$538K |
|
|
SWI
350
DELISTED
SOLARWINDS INC COM STK (DE)
SWI
| $613K | 0.05% |
+10,410
| New | +$577K |
|
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.