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 | |
|---|---|---|---|---|---|---|
1051
PUT
iShares Silver Trust
SLV
$27.8B
| $150K | 0.01% |
1,229
+224
| +22% | +$3.18K |
|
|
ROI
1052
PUT
DELISTED
WISDOMTREE LARGECAP GROWTH FUND
ROI
| $150K | 0.01% |
355
-314
| -47% | -$133K |
|
1053
Celanese
CE
$5.19B
| $149K | 0.01% |
+2,286
| New | +$142K |
|
1054
PUT
Canadian Natural Resources
CNQ
$98B
| $149K | 0.01% |
2,635
+2,321
| +739% | +$24.7K |
|
1055
CALL
Genuine Parts
GPC
$16.6B
| $149K | 0.01% |
345
+288
| +505% | +$25.5K |
|
1056
Lands' End
LE
$358M
| $149K | 0.01% |
5,841
+1,650
| +39% | +$38.7K |
|
1057
PUT
PRA Group
PRAA
$616M
| $149K | 0.01% |
125
+13
| +12% | +$374 |
|
1058
CALL
Cirrus Logic
CRUS
$6.74B
| $148K | 0.01% |
385
+97
| +34% | +$3.15K |
|
1059
Darling Ingredients
DAR
$10.1B
| $148K | 0.01% |
11,302
-8,066
| -42% | -$81.3K |
|
1060
CALL
Microchip Technology
MCHP
$44.2B
| $148K | 0.01% |
786
+740
| +1,609% | +$16.5K |
|
1061
CALL
Morgan Stanley
MS
$338B
| $148K | 0.01% |
2,905
+2,144
| +282% | +$54.7K |
|
1062
CALL
Tenet Healthcare
THC
$17.1B
| $148K | 0.01% |
261
+90
| +53% | +$2.34K |
|
|
CCIH
1063
DELISTED
Chinacache International Holdings Ltd
CCIH
| $148K | 0.01% |
18,764
+17,656
| +1,594% | +$134K |
|
1064
Abercrombie & Fitch
ANF
$4.04B
| $147K | 0.01% |
4,686
-12,231
| -72% | -$343K |
|
1065
PUT
ProShares Ultra S&P500
SSO
$7.82B
| $147K | 0.01% |
12,456
+5,488
| +79% | +$39.4K |
|
1066
CALL
Wayfair
W
$10.9B
| $147K | 0.01% |
174
-88
| -34% | -$3.64K |
|
1067
CALL
Williams Companies
WMB
$92B
| $147K | 0.01% |
1,244
-1,334
| -52% | -$22.9K |
|
|
EMES
1068
PUT
DELISTED
Emerge Energy Services LP
EMES
| $147K | 0.01% |
136
+77
| +131% | +$313 |
|
1069
Vanguard High Dividend Yield ETF
VYM
$80.6B
| $146K | 0.01% |
+2,121
| New | +$139K |
|
|
MESG
1070
DELISTED
XURA INC COM (DE)
MESG
| $146K | 0.01% |
+7,446
| New | +$153K |
|
|
DSKY
1071
DELISTED
IDREAMSKY TECHNOLOGY LTD ADS REPTSG SHS CL A
DSKY
| $146K | 0.01% |
10,657
-2,812
| -21% | -$37.7K |
|
1072
PUT
Baxter International
BAX
$11.2B
| $145K | 0.01% |
324
+32
| +11% | +$1.22K |
|
1073
BlackBerry
BB
$5.06B
| $145K | 0.01% |
17,994
+8,355
| +87% | +$62.7K |
|
|
IPXL
1074
DELISTED
Impax Laboratories, Inc.
IPXL
| $145K | 0.01% |
+4,550
| New | +$160K |
|
1075
Deckers Outdoor
DECK
$13.4B
| $144K | 0.01% |
14,484
+13,770
| +1,929% | +$119K |
|
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.