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 | |
|---|---|---|---|---|---|---|
676
Melco Resorts & Entertainment
MLCO
$1.98B
| $279K | 0.02% |
16,615
+71
| +0.4% | +$1.21K |
|
677
Teradata
TDC
$2.61B
| $279K | 0.02% |
10,591
-4,682
| -31% | -$132K |
|
678
Vertex Pharmaceuticals
VRTX
$138B
| $279K | 0.02% |
2,223
-940
| -30% | -$113K |
|
|
SPNC
679
DELISTED
Spectranetics Corp
SPNC
| $279K | 0.02% |
18,537
+4,269
| +30% | +$56.4K |
|
680
ASML
ASML
$659B
| $278K | 0.02% |
3,138
-2,362
| -43% | -$215K |
|
681
Franco-Nevada
FNV
$51.3B
| $278K | 0.02% |
+6,092
| New | +$295K |
|
|
SWIR
682
PUT
DELISTED
Sierra Wireless
SWIR
| $278K | 0.02% |
592
-14
| -2% | -$272 |
|
683
PUT
Herbalife
HLF
$1.3B
| $277K | 0.02% |
3,492
-860
| -20% | -$23.9K |
|
684
PUT
Johnson & Johnson
JNJ
$663B
| $276K | 0.02% |
2,906
-463
| -14% | -$46.6K |
|
685
CALL
United Parcel Service
UPS
$87B
| $275K | 0.02% |
1,356
-1,182
| -47% | -$121K |
|
686
CALL
Coca-Cola
KO
$379B
| $273K | 0.02% |
1,735
-482
| -22% | -$20.5K |
|
|
RTN
687
CALL
DELISTED
Raytheon Company
RTN
| $273K | 0.02% |
700
+496
| +243% | +$59.6K |
|
688
ATI
ATI
$28.7B
| $272K | 0.02% |
24,244
-1,691
| -7% | -$23.3K |
|
689
CALL
Qualcomm
QCOM
$180B
| $272K | 0.02% |
3,030
+1,814
| +149% | +$96.8K |
|
690
PUT
Occidental Petroleum
OXY
$60B
| $271K | 0.02% |
2,007
+327
| +19% | +$23.5K |
|
|
HNGR
691
DELISTED
Hanger Inc.
HNGR
| $271K | 0.02% |
16,530
+13,105
| +383% | +$198K |
|
692
ProShares Ultra Gold
UGL
$875M
| $270K | 0.02% |
36,408
+27,452
| +307% | +$223K |
|
|
DF
693
DELISTED
Dean Foods Company
DF
| $269K | 0.02% |
+15,690
| New | +$283K |
|
694
NGL Energy Partners
NGL
$2.22B
| $268K | 0.02% |
24,355
+23,730
| +3,797% | +$382K |
|
695
Danaher
DHR
$146B
| $267K | 0.02% |
4,288
-3,535
| -45% | -$221K |
|
696
CALL
Eli Lilly
LLY
$1.02T
| $267K | 0.02% |
1,512
-1,329
| -47% | -$110K |
|
697
PUT
Procter & Gamble
PG
$340B
| $267K | 0.02% |
3,404
+779
| +30% | +$59.5K |
|
698
KB Home
KBH
$3.2B
| $266K | 0.02% |
21,625
+3,205
| +17% | +$43.2K |
|
|
DD
699
DELISTED
Du Pont De Nemours E I
DD
| $266K | 0.02% |
4,000
-17,543
| -81% | -$1.11M |
|
|
OCAT
700
DELISTED
OCATA THERAPEUTICS, INC. COMMON STOCK
OCAT
| $266K | 0.02% |
+31,700
| New | +$212K |
|
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.