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 | |
|---|---|---|---|---|---|---|
|
IDTI
626
CALL
DELISTED
Integrated Device Technology I
IDTI
| $312K | 0.02% |
574
-31
| -5% | -$795 |
|
627
Ford
F
$58.3B
| $311K | 0.02% |
22,143
+13,869
| +168% | +$201K |
|
628
HP
HPQ
$29.4B
| $311K | 0.02% |
26,298
-148,851
| -85% | -$1.9M |
|
629
PUT
Royal Gold
RGLD
$22.2B
| $311K | 0.02% |
225
-69
| -23% | -$2.88K |
|
630
PUT
Yum! Brands
YUM
$41.1B
| $311K | 0.02% |
1,381
-953
| -41% | -$49.8K |
|
631
Affiliated Managers Group
AMG
$9.57B
| $308K | 0.02% |
1,929
+864
| +81% | +$149K |
|
|
OIL
632
DELISTED
Barclays Bank PLC iPath Exchange Traded Notes Linked to Goldman Sachs Crude Oil Total Return In
OIL
| $308K | 0.02% |
49,467
+37,715
| +321% | +$292K |
|
|
DHC
633
Diversified Healthcare Trust
DHC
$1.82B
| $307K | 0.02% |
20,700
+8,006
| +63% | +$120K |
|
634
Rio Tinto
RIO
$168B
| $307K | 0.02% |
10,566
+7,339
| +227% | +$248K |
|
635
Sonida Senior Living
SNDA
$1.81B
| $307K | 0.02% |
982
-783
| -44% | -$261K |
|
636
Walmart Inc
WMT
$850B
| $307K | 0.02% |
15,051
-53,220
| -78% | -$1.07M |
|
637
Delek US
DK
$4.4B
| $306K | 0.02% |
+12,443
| New | +$326K |
|
638
Acadia Pharmaceuticals
ACAD
$4.83B
| $304K | 0.02% |
8,543
+6,517
| +322% | +$230K |
|
639
PUT
Cheniere Energy
LNG
$60.3B
| $302K | 0.02% |
349
-705
| -67% | -$32.1K |
|
640
CALL
Wayfair
W
$13.6B
| $302K | 0.02% |
262
-144
| -35% | -$6.09K |
|
641
OFG Bancorp
OFG
$2.25B
| $301K | 0.02% |
+41,245
| New | +$354K |
|
642
Pan American Silver
PAAS
$21.3B
| $301K | 0.02% |
46,380
+44,026
| +1,870% | +$317K |
|
|
SRCL
643
DELISTED
Stericycle Inc
SRCL
| $301K | 0.02% |
2,498
+2,290
| +1,101% | +$292K |
|
|
ACHN
644
DELISTED
Achillion Pharmaceuticals
ACHN
| $300K | 0.02% |
+27,853
| New | +$253K |
|
645
PUT
Norfolk Southern
NSC
$74B
| $299K | 0.02% |
521
+307
| +143% | +$26.3K |
|
646
Oneok
OKE
$60.2B
| $299K | 0.02% |
12,144
+7,023
| +137% | +$211K |
|
647
Philips
PHG
$25.3B
| $299K | 0.02% |
16,459
-24,001
| -59% | -$449K |
|
648
LGI Homes
LGIH
$1.28B
| $298K | 0.02% |
+12,289
| New | +$358K |
|
|
649
CALL
Chipotle Mexican Grill
CMG
$46.8B
| $297K | 0.02% |
48,200
-1,800
| -4% | -$22K |
|
650
CALL
New Oriental
EDU
$9.47B
| $297K | 0.02% |
278
+186
| +202% | +$5.24K |
|
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.