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 | |
|---|---|---|---|---|---|---|
3451
iShares MSCI India ETF
INDA
$6.77B
| $10K | ﹤0.01% |
+375
| New | +$9.58K |
|
|
IRBT
3452
PUT
DELISTED
iRobot
IRBT
| $10K | ﹤0.01% |
21
-38
| -64% | -$1.24K |
|
3453
Kforce
KFRC
$1.04B
| $10K | ﹤0.01% |
+559
| New | +$10.8K |
|
3454
Kimco Realty
KIM
$17.8B
| $10K | ﹤0.01% |
+355
| New | +$9.58K |
|
3455
CALL
La-Z-Boy
LZB
$1.62B
| $10K | ﹤0.01% |
+51
| New | +$1.19K |
|
|
CALY
3456
PUT
Callaway Golf Company
CALY
$3.28B
| $10K | ﹤0.01% |
132
+29
| +28% | +$254 |
|
3457
CALL
Matador Resources
MTDR
$5.86B
| $10K | ﹤0.01% |
166
+124
| +295% | +$2.06K |
|
3458
Magnachip Semiconductor
MX
$126M
| $10K | ﹤0.01% |
+2,009
| New | +$9.35K |
|
3459
CALL
Myriad Genetics
MYGN
$515M
| $10K | ﹤0.01% |
112
-67
| -37% | -$2.52K |
|
3460
CALL
NiSource
NI
$22B
| $10K | ﹤0.01% |
+43
| New | +$922 |
|
3461
CALL
Northern Trust
NTRS
$22.4B
| $10K | ﹤0.01% |
+55
| New | +$3.45K |
|
3462
CALL
Nu Skin
NUS
$250M
| $10K | ﹤0.01% |
19
-83
| -81% | -$2.75K |
|
3463
PUT
Nexstar Media Group
NXST
$5.67B
| $10K | ﹤0.01% |
74
+56
| +311% | +$2.53K |
|
3464
PUT
Paycom
PAYC
$7.05B
| $10K | ﹤0.01% |
39
-10
| -20% | -$312 |
|
3465
CALL
Polaris
PII
$4.25B
| $10K | ﹤0.01% |
81
+5
| +7% | +$434 |
|
3466
PUT
CPI Card Group
PMTS
$235M
| $10K | ﹤0.01% |
7
+2
| +40% | +$83 |
|
3467
CALL
Quanta Services
PWR
$93.1B
| $10K | ﹤0.01% |
+56
| New | +$1.11K |
|
3468
PUT
Research Frontiers
REFR
$16.1M
| $10K | ﹤0.01% |
+20
| New | +$90 |
|
|
RGLS
3469
PUT
DELISTED
Regulus Therapeutics
RGLS
| $10K | ﹤0.01% |
+1
| New | +$796 |
|
3470
PUT
Rush Enterprises Class A
RUSHA
$5.98B
| $10K | ﹤0.01% |
+115
| New | +$927 |
|
3471
Safe Bulkers
SB
$766M
| $10K | ﹤0.01% |
12,990
-6,000
| -32% | -$3.54K |
|
3472
CALL
Scholastic
SCHL
$752M
| $10K | ﹤0.01% |
39
-284
| -88% | -$10.1K |
|
3473
CALL
Comscore
SCOR
$107M
| $10K | ﹤0.01% |
+2
| New | +$1.45K |
|
3474
PUT
Sony
SONY
$131B
| $10K | ﹤0.01% |
1,980
+230
| +13% | +$1.05K |
|
3475
PUT
Suburban Propane Partners
SPH
$1.21B
| $10K | ﹤0.01% |
21
-185
| -90% | -$4.87K |
|
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.