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 | Miscellaneous | 51.63% |
| 2 | Consumer Discretionary | 9.7% |
| 3 | Healthcare | 7.81% |
| 4 | Technology | 7.23% |
| 5 | Communication Services | 6.86% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
376
PUT
Whirlpool
WHR
$2.56B
| $583K | 0.05% |
503
+153
| +44% | +$23.7K |
|
377
Qualcomm
QCOM
$180B
| $579K | 0.05% |
11,586
-45,643
| -80% | -$2.44M |
|
|
POT
378
DELISTED
Potash Corp Of Saskatchewan
POT
| $577K | 0.05% |
33,704
+33,320
| +8,677% | +$663K |
|
379
Avis
CAR
$4.9B
| $576K | 0.05% |
15,890
+11,944
| +303% | +$503K |
|
380
Liberty Media Series A
FWONA
$22.2B
| $571K | 0.04% |
+21,646
| New | +$577K |
|
381
CALL
Johnson & Johnson
JNJ
$663B
| $570K | 0.04% |
1,749
-420
| -19% | -$42.2K |
|
382
AerCap
AER
$22.9B
| $569K | 0.04% |
+13,193
| New | +$552K |
|
|
HZNP
383
PUT
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $568K | 0.04% |
1,189
+664
| +126% | +$12.9K |
|
384
Infosys
INFY
$47.4B
| $565K | 0.04% |
67,486
+52,846
| +361% | +$458K |
|
385
CALL
State Street SPDR NYSE Technology ETF
XNTK
$1.9B
| $565K | 0.04% |
7,251
+1,214
| +20% | +$65.8K |
|
|
YHOO
386
DELISTED
Yahoo Inc
YHOO
| $565K | 0.04% |
17,006
-783
| -4% | -$26.1K |
|
387
IMAX
IMAX
$2.83B
| $564K | 0.04% |
+15,872
| New | +$595K |
|
388
Canadian National Railway
CNI
$74.6B
| $562K | 0.04% |
+10,070
| New | +$589K |
|
389
CALL
Viatris
VTRS
$19.4B
| $560K | 0.04% |
2,848
-177
| -6% | -$8.51K |
|
|
BXLT
390
DELISTED
BAXALTA INC COM STK (DE)
BXLT
| $560K | 0.04% |
14,373
+8,346
| +138% | +$291K |
|
391
Diageo
DEO
$49.6B
| $559K | 0.04% |
5,126
+1,380
| +37% | +$156K |
|
392
Merck
MRK
$371B
| $558K | 0.04% |
11,077
-31,049
| -74% | -$1.57M |
|
|
CHK
393
PUT
DELISTED
Chesapeake Energy Corporation
CHK
| $558K | 0.04% |
11
-4
| -27% | -$4.97K |
|
394
Ciena
CIEN
$45.5B
| $555K | 0.04% |
+26,852
| New | +$617K |
|
395
CenterPoint Energy
CNP
$26.1B
| $555K | 0.04% |
30,260
+29,680
| +5,117% | +$527K |
|
396
CALL
Procter & Gamble
PG
$340B
| $553K | 0.04% |
1,798
+550
| +44% | +$42K |
|
397
Edgewell Personal Care
EPC
$1.33B
| $552K | 0.04% |
7,054
+5,644
| +400% | +$458K |
|
398
Invesco QQQ Trust
QQQ
$490B
| $552K | 0.04% |
4,941
-94,361
| -95% | -$10.5M |
|
|
AET
399
CALL
DELISTED
Aetna Inc
AET
| $552K | 0.04% |
1,176
-902
| -43% | -$97.5K |
|
|
BHI
400
PUT
DELISTED
Baker Hughes
BHI
| $549K | 0.04% |
638
+82
| +15% | +$4.2K |
|
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 deployed $39.7M of net new capital in Q4 2015, opening 1,415 new positions and adding to 1,993 existing holdings. Its largest new stake was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.
By sector, the portfolio is most concentrated in Miscellaneous at 52% of assets, down from 65% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $13.8M trimmed.
- 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 1,415 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.