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 | |
|---|---|---|---|---|---|---|
426
Ball Corp
BALL
$16.6B
| $504K | 0.04% |
13,880
+9,212
| +197% | +$315K |
|
|
PRE
427
DELISTED
PARTNERRE LTD
PRE
| $504K | 0.04% |
3,607
+2,390
| +196% | +$332K |
|
|
SDRL
428
PUT
DELISTED
Seadrill Limited Common Stock
SDRL
| $503K | 0.04% |
2
| – | – |
|
429
Abbott
ABT
$175B
| $502K | 0.04% |
+11,182
| New | +$494K |
|
430
Canadian Pacific Kansas City
CP
$82B
| $502K | 0.04% |
19,695
-24,330
| -55% | -$683K |
|
431
CALL
DuPont de Nemours
DD
$18.6B
| $501K | 0.04% |
1,075
-2
| -0.2% | -$257 |
|
432
Prudential Financial
PRU
$40.9B
| $500K | 0.04% |
+6,145
| New | +$508K |
|
433
CALL
Sarepta Therapeutics
SRPT
$1.68B
| $499K | 0.04% |
526
-76
| -13% | -$2.46K |
|
434
CALL
Starbucks
SBUX
$118B
| $498K | 0.04% |
1,229
-1,671
| -58% | -$102K |
|
|
BLUE
435
DELISTED
bluebird bio
BLUE
| $497K | 0.04% |
598
+74
| +14% | +$73.9K |
|
436
CALL
Cigna
CI
$75.7B
| $495K | 0.04% |
384
-394
| -51% | -$54.2K |
|
437
PUT
Mastercard
MA
$469B
| $495K | 0.04% |
1,100
-288
| -21% | -$28.2K |
|
438
PUT
Yelp
YELP
$1.35B
| $494K | 0.04% |
510
-72
| -12% | -$1.89K |
|
439
PUT
Zillow
Z
$6.77B
| $494K | 0.04% |
424
-22
| -5% | -$582 |
|
|
GWPH
440
PUT
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $494K | 0.04% |
349
+205
| +142% | +$16.7K |
|
|
WGL
441
DELISTED
Wgl Holdings
WGL
| $494K | 0.04% |
+7,848
| New | +$479K |
|
442
CALL
Incyte
INCY
$23.3B
| $493K | 0.04% |
251
+148
| +144% | +$16.5K |
|
|
WW
443
DELISTED
WW International
WW
| $492K | 0.04% |
21,611
+7,327
| +51% | +$138K |
|
444
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$26.9B
| $490K | 0.04% |
706
+292
| +71% | +$76K |
|
445
PUT
Puma Biotechnology
PBYI
$408M
| $490K | 0.04% |
160
-26
| -14% | -$2.04K |
|
|
BPL
446
DELISTED
Buckeye Partners, L.P.
BPL
| $489K | 0.04% |
+7,423
| New | +$486K |
|
447
CALL
Skyworks Solutions
SWKS
$9.1B
| $485K | 0.04% |
2,025
-511
| -20% | -$40.9K |
|
448
Pacific Biosciences
PACB
$435M
| $484K | 0.04% |
+36,937
| New | +$331K |
|
449
CALL
Tyson Foods
TSN
$20B
| $480K | 0.04% |
957
+508
| +113% | +$24.4K |
|
|
LNKD
450
PUT
DELISTED
LinkedIn Corporation
LNKD
| $480K | 0.04% |
1,551
-57
| -4% | -$12.9K |
|
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.