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 | |
|---|---|---|---|---|---|---|
|
WPX
526
DELISTED
WPX Energy, Inc.
WPX
| $411K | 0.03% |
58,922
+14,313
| +32% | +$73K |
|
527
CALL
General Mills
GIS
$19.7B
| $410K | 0.03% |
674
-99
| -13% | -$5.75K |
|
528
Teucrium Corn Fund
CORN
$190M
| $407K | 0.03% |
20,250
+17,048
| +532% | +$361K |
|
529
Shopify
SHOP
$154B
| $407K | 0.03% |
144,430
+126,790
| +719% | +$300K |
|
530
Ionis Pharmaceuticals
IONS
$8.93B
| $404K | 0.03% |
9,988
+6,784
| +212% | +$276K |
|
531
CALL
PepsiCo
PEP
$185B
| $404K | 0.03% |
965
+465
| +93% | +$45.9K |
|
|
MRO
532
CALL
DELISTED
Marathon Oil Corporation
MRO
| $404K | 0.03% |
3,862
+3,092
| +402% | +$28.9K |
|
533
Agios Pharmaceuticals
AGIO
$2.14B
| $403K | 0.03% |
9,933
+9,812
| +8,109% | +$419K |
|
534
ProShares UltraShort FTSE Europe
EPV
$11.4M
| $403K | 0.03% |
+1,369
| New | +$446K |
|
535
CALL
LyondellBasell Industries
LYB
$20.1B
| $402K | 0.03% |
648
-210
| -24% | -$16.9K |
|
|
PARA
536
CALL
DELISTED
Paramount Global Class B
PARA
| $401K | 0.03% |
1,260
+509
| +68% | +$24.8K |
|
|
ZBIO
537
DELISTED
ProShares UltraPro Short NASDAQ Biotechnology
ZBIO
| $400K | 0.03% |
+5,531
| New | +$410K |
|
538
PUT
Ambarella
AMBA
$3.03B
| $399K | 0.03% |
790
+174
| +28% | +$7.2K |
|
539
Dillards
DDS
$9.2B
| $399K | 0.03% |
+4,705
| New | +$353K |
|
|
INFN
540
DELISTED
Infinera Corporation Common Stock
INFN
| $398K | 0.03% |
24,820
+11,840
| +91% | +$182K |
|
541
PUT
Chevron
CVX
$384B
| $397K | 0.03% |
3,621
+464
| +15% | +$40.6K |
|
542
PUT
United States Natural Gas Fund
UNG
$472M
| $396K | 0.03% |
65
+10
| +18% | +$1.15K |
|
543
PUT
Perrigo
PRGO
$1.45B
| $394K | 0.03% |
234
+98
| +72% | +$13.4K |
|
544
Voya Financial
VOYA
$8.93B
| $392K | 0.03% |
13,191
+7,982
| +153% | +$242K |
|
545
CALL
Las Vegas Sands
LVS
$30B
| $391K | 0.03% |
994
-49
| -5% | -$2.24K |
|
546
CALL
Vanguard S&P 500 ETF
VOO
$979B
| $391K | 0.03% |
856
+220
| +35% | +$39.4K |
|
|
GG.WS.A
547
CALL
DELISTED
GOLDCORP INC SERIES A WARRANTS EXP 5/30/2007
GG.WS.A
| $389K | 0.03% |
2,250
+2,136
| +1,874% | +$369K |
|
548
CarMax
KMX
$8.15B
| $386K | 0.03% |
7,560
+6,144
| +434% | +$290K |
|
549
Public Storage
PSA
$54.7B
| $386K | 0.03% |
1,402
+58
| +4% | +$14.6K |
|
550
iShares Russell Mid-Cap Value ETF
IWS
$15.6B
| $383K | 0.03% |
+5,411
| New | +$357K |
|
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.