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 | |
|---|---|---|---|---|---|---|
1426
VirnetX Holding Corp
VHC
$52.3M
| $92K | 0.01% |
1,806
+630
| +54% | +$41.3K |
|
|
BKS
1427
PUT
DELISTED
Barnes & Noble
BKS
| $92K | 0.01% |
273
+13
| +5% | +$153 |
|
|
MENT
1428
DELISTED
Mentor Graphics Corp
MENT
| $92K | 0.01% |
+5,020
| New | +$115K |
|
|
ARR
1429
Armour Residential REIT
ARR
$2.02B
| $91K | 0.01% |
838
+831
| +11,871% | +$87.2K |
|
1430
PUT
Cemex
CX
$17.4B
| $91K | 0.01% |
384
+287
| +296% | +$1.68K |
|
1431
Teck Resources
TECK
$29.5B
| $91K | 0.01% |
23,823
-4,317
| -15% | -$21.4K |
|
|
WBA
1432
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $91K | 0.01% |
1,095
-66
| -6% | -$5.61K |
|
|
FINL
1433
DELISTED
Finish Line
FINL
| $91K | 0.01% |
5,066
+2,786
| +122% | +$49.5K |
|
|
GG
1434
DELISTED
Goldcorp Inc
GG
| $91K | 0.01% |
+7,898
| New | +$100K |
|
1435
CALL
Bath & Body Works
BBWI
$4.01B
| $90K | 0.01% |
513
+198
| +63% | +$15.3K |
|
1436
CALL
Electronic Arts
EA
$52.4B
| $90K | 0.01% |
233
-103
| -31% | -$7.23K |
|
1437
CALL
Ford
F
$57.3B
| $90K | 0.01% |
399
+79
| +25% | +$1.14K |
|
|
HEES
1438
PUT
DELISTED
H&E Equipment Services
HEES
| $90K | 0.01% |
305
+237
| +349% | +$4.35K |
|
1439
Match Group
MTCH
$8.84B
| $90K | 0.01% |
+6,652
| New | +$93.1K |
|
1440
CALL
Pacific Biosciences
PACB
$422M
| $90K | 0.01% |
167
+38
| +29% | +$341 |
|
1441
PUT
Plains GP Holdings
PAGP
$5.23B
| $90K | 0.01% |
332
+329
| +10,967% | +$11.5K |
|
|
SEE
1442
DELISTED
Sealed Air
SEE
| $90K | 0.01% |
2,036
-3,675
| -64% | -$170K |
|
1443
PUT
Simon Property Group
SPG
$74.5B
| $90K | 0.01% |
397
+23
| +6% | +$4.46K |
|
1444
CALL
Synchrony
SYF
$23.7B
| $90K | 0.01% |
2,068
+1,777
| +611% | +$55.7K |
|
|
SWI
1445
CALL
DELISTED
SOLARWINDS INC COM STK (DE)
SWI
| $90K | 0.01% |
354
+302
| +581% | +$16.7K |
|
|
ANAC
1446
CALL
DELISTED
ANACOR PHARMACEUTICALS INC COM
ANAC
| $90K | 0.01% |
114
+23
| +25% | +$2.53K |
|
1447
BlackBerry
BB
$5.01B
| $89K | 0.01% |
9,639
-34,561
| -78% | -$266K |
|
1448
CALL
National Beverage
FIZZ
$2.87B
| $89K | 0.01% |
158
+128
| +427% | +$2.48K |
|
1449
Monolithic Power Systems
MPWR
$65.5B
| $89K | 0.01% |
1,412
+539
| +62% | +$33.5K |
|
1450
CALL
Novavax
NVAX
$1.23B
| $89K | 0.01% |
50
+6
| +14% | +$923 |
|
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.