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 | |
|---|---|---|---|---|---|---|
401
iShares MSCI Australia ETF
EWA
$1.33B
| $545K | 0.04% |
28,756
+26,701
| +1,299% | +$505K |
|
402
PUT
Polaris
PII
$4.13B
| $545K | 0.04% |
233
+129
| +124% | +$13.7K |
|
403
iShares Silver Trust
SLV
$27.8B
| $545K | 0.04% |
41,350
+11,952
| +41% | +$168K |
|
404
PUT
Pan American Silver
PAAS
$18.6B
| $543K | 0.04% |
587
+538
| +1,098% | +$3.87K |
|
405
PUT
BHP
BHP
$212B
| $535K | 0.04% |
972
+553
| +132% | +$14.8K |
|
406
Pentair
PNR
$10B
| $535K | 0.04% |
16,107
+11,746
| +269% | +$429K |
|
|
HPY
407
DELISTED
HEARTLAND PAYMENT SYSTEMS, INC. COM STK
HPY
| $535K | 0.04% |
+5,652
| New | +$436K |
|
|
AET
408
PUT
DELISTED
Aetna Inc
AET
| $532K | 0.04% |
659
-647
| -50% | -$69.9K |
|
409
CALL
Bristol-Myers Squibb
BMY
$126B
| $531K | 0.04% |
1,333
-2,054
| -61% | -$136K |
|
|
DPLO
410
DELISTED
DIPLOMAT PHARMACY, INC.
DPLO
| $528K | 0.04% |
15,443
+14,218
| +1,161% | +$444K |
|
|
POT
411
PUT
DELISTED
Potash Corp Of Saskatchewan
POT
| $528K | 0.04% |
711
-539
| -43% | -$10.7K |
|
412
ProShares Ultra Real Estate
URE
$57.7M
| $526K | 0.04% |
10,082
-370
| -4% | -$18.9K |
|
413
PUT
Intuitive Surgical
ISRG
$119B
| $525K | 0.04% |
1,251
-729
| -37% | -$40.9K |
|
414
CALL
GE Aerospace
GE
$362B
| $524K | 0.04% |
506
+196
| +63% | +$27.8K |
|
|
MRO
415
DELISTED
Marathon Oil Corporation
MRO
| $524K | 0.04% |
41,663
+16,752
| +67% | +$282K |
|
416
Pacira BioSciences
PCRX
$1.02B
| $522K | 0.04% |
6,804
+6,625
| +3,701% | +$375K |
|
|
TWTR
417
CALL
DELISTED
Twitter, Inc.
TWTR
| $519K | 0.04% |
6,152
-269
| -4% | -$7.17K |
|
418
CALL
First Solar
FSLR
$22.1B
| $518K | 0.04% |
1,091
+750
| +220% | +$42K |
|
419
GoPro
GPRO
$119M
| $517K | 0.04% |
28,749
-26,774
| -48% | -$622K |
|
|
HDP
420
DELISTED
Hortonworks, Inc.
HDP
| $517K | 0.04% |
+23,638
| New | +$464K |
|
421
PUT
Capri Holdings
CPRI
$1.78B
| $513K | 0.04% |
630
-212
| -25% | -$8.73K |
|
|
CELG
422
PUT
DELISTED
Celgene Corp
CELG
| $512K | 0.04% |
3,051
+752
| +33% | +$87K |
|
423
CALL
Lam Research
LRCX
$400B
| $509K | 0.04% |
5,050
+1,730
| +52% | +$13K |
|
|
EQM
424
DELISTED
EQM Midstream Partners, LP
EQM
| $509K | 0.04% |
6,753
+3,738
| +124% | +$266K |
|
|
EGRX
425
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $508K | 0.04% |
+5,737
| New | +$453K |
|
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.