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 |
Broadcom
AVGO
|
+$33.7M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.8M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.3M |
| 4 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$11.9M |
| 5 |
Citigroup
C
|
+$8.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$34.2M |
| 2 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$17.9M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$14.7M |
| 4 |
Walt Disney
DIS
|
+$13.3M |
| 5 |
Booking.com
BKNG
|
+$12.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 7.64% |
| 2 | Communication Services | 6.85% |
| 3 | Consumer Discretionary | 4.92% |
| 4 | Healthcare | 4.57% |
| 5 | Financials | 4.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
451
CALL
Walmart Inc
WMT
$870B
| $493K | 0.04% |
12,297
+2,505
| +26% | +$54.9K |
|
|
452
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $491K | 0.04% |
799
-520
| -39% | -$127K |
|
|
FISV
453
Fiserv Inc
FISV
$26.8B
| $490K | 0.04% |
+9,568
| New | +$454K |
|
454
CALL
United States Oil Fund
USO
$2.36B
| $489K | 0.04% |
827
+642
| +347% | +$47.9K |
|
|
BUFF
455
DELISTED
Blue Buffalo Pet Products, Inc
BUFF
| $487K | 0.04% |
+19,013
| New | +$365K |
|
456
Intercontinental Exchange
ICE
$80.6B
| $486K | 0.04% |
+10,345
| New | +$503K |
|
457
KKR & Co
KKR
$85.8B
| $486K | 0.04% |
33,137
+9,288
| +39% | +$126K |
|
458
State Street SPDR S&P Biotech ETF
XBI
$10.2B
| $484K | 0.04% |
9,373
+8,772
| +1,460% | +$456K |
|
|
VMW
459
DELISTED
VMware, Inc
VMW
| $482K | 0.04% |
+9,231
| New | +$457K |
|
460
Criteo
CRTO
$1.06B
| $480K | 0.04% |
+11,596
| New | +$405K |
|
461
Lumen
LUMN
$6.9B
| $480K | 0.04% |
+15,042
| New | +$422K |
|
462
Altria Group
MO
$121B
| $480K | 0.04% |
+7,673
| New | +$464K |
|
463
PUT
Tronox
TROX
$1.06B
| $478K | 0.04% |
557
-6
| -1% | -$27 |
|
464
VF Corp
VFC
$6.74B
| $477K | 0.04% |
7,823
-3,942
| -34% | -$229K |
|
465
PUT
Yelp
YELP
$1.36B
| $477K | 0.04% |
935
+425
| +83% | +$8.7K |
|
466
ProShares Ultra QQQ
QLD
$13.3B
| $476K | 0.04% |
+103,216
| New | +$432K |
|
467
FMC
FMC
$1.48B
| $475K | 0.04% |
13,583
+11,381
| +517% | +$369K |
|
468
Globus Medical
GMED
$10.2B
| $475K | 0.04% |
20,018
+19,983
| +57,094% | +$488K |
|
469
CALL
Oracle
ORCL
$362B
| $475K | 0.04% |
2,809
+2,564
| +1,047% | +$94.9K |
|
470
Sturm, Ruger & Co
RGR
$612M
| $473K | 0.04% |
6,927
+2,143
| +45% | +$140K |
|
471
CALL
Sarepta Therapeutics
SRPT
$1.67B
| $473K | 0.04% |
1,831
+1,305
| +248% | +$22.8K |
|
472
ProShares UltraPro S&P 500
UPRO
$5.28B
| $473K | 0.04% |
+44,892
| New | +$405K |
|
473
Direxion Daily FTSE China Bull 3X ETF
YINN
$653M
| $471K | 0.04% |
1,644
+1,010
| +159% | +$241K |
|
474
CALL
AutoZone
AZO
$48.5B
| $470K | 0.04% |
147
-42
| -22% | -$31.8K |
|
|
AFFX
475
DELISTED
Affymetrix Inc
AFFX
| $469K | 0.04% |
33,504
+33,444
| +55,740% | +$458K |
|
Similar funds
Simplex Trading's Q1 2016 Portfolio in Review
As of Q1 2016, Simplex Trading held 7,084 positions worth $1.25B, down 1.8% from $1.28B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading's Q1 2016 filing shows 1,678 new, 2,214 increased, 1,528 reduced and 1,505 closed positions. Its largest new stake was Broadcom: 2,493,400 shares worth $38.5M. The largest sale was Apple, an estimated $34.2M.
By sector, the portfolio is most concentrated in Technology at 7.6% of assets, up from 7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q1 2016 buy was Broadcom: 2,493,400 shares worth $38.5M.
- Simplex Trading added most to Citigroup in Q1 2016, an estimated $8.7M increase.
- Simplex Trading's biggest Q1 2016 reduction was Booking.com, cutting an estimated $12.1M.
- Simplex Trading fully exited Apple in Q1 2016, selling an estimated $34.2M.
- Simplex Trading's ten largest holdings make up 17% of its $1.25B portfolio in Q1 2016.
- Simplex Trading opened 1,678 new positions and closed 1,505 in Q1 2016.
- Simplex Trading's portfolio value fell 1.8% quarter-over-quarter to $1.25B.
Based on Simplex Trading's 13F filing for Q1 2016, filed 14 Apr 2016.