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 | Miscellaneous | 60.01% |
| 2 | Technology | 7.86% |
| 3 | Communication Services | 7% |
| 4 | Consumer Discretionary | 5.21% |
| 5 | Healthcare | 4.94% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1901
Andersons Inc
ANDE
$2.4B
| $53K | ﹤0.01% |
1,703
-3,786
| -69% | -$108K |
|
1902
CALL
Abercrombie & Fitch
ANF
$6.72B
| $53K | ﹤0.01% |
273
-10
| -4% | -$281 |
|
|
ANSS
1903
DELISTED
Ansys
ANSS
| $53K | ﹤0.01% |
602
-90
| -13% | -$7.76K |
|
1904
Ares Capital
ARCC
$14.1B
| $53K | ﹤0.01% |
+3,587
| New | +$49.4K |
|
1905
PUT
Dollar Tree
DLTR
$23.3B
| $53K | ﹤0.01% |
218
-101
| -32% | -$7.96K |
|
1906
CALL
Green Dot
GDOT
$758M
| $53K | ﹤0.01% |
174
+164
| +1,640% | +$3.18K |
|
1907
CALL
HDFC Bank
HDB
$116B
| $53K | ﹤0.01% |
+532
| New | +$7.6K |
|
1908
PUT
Cheniere Energy
LNG
$57B
| $53K | ﹤0.01% |
262
-87
| -25% | -$2.82K |
|
1909
CALL
El Pollo Loco
LOCO
$463M
| $53K | ﹤0.01% |
304
+62
| +26% | +$780 |
|
1910
PUT
Plains GP Holdings
PAGP
$5.56B
| $53K | ﹤0.01% |
164
-168
| -51% | -$3.45K |
|
|
PARA
1911
PUT
DELISTED
Paramount Global Class B
PARA
| $53K | ﹤0.01% |
572
+282
| +97% | +$13.7K |
|
1912
CALL
Wolfspeed
WOLF
$1.49B
| $53K | ﹤0.01% |
418
-106
| -20% | -$3.04K |
|
|
HZNP
1913
PUT
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $53K | ﹤0.01% |
276
-913
| -77% | -$16K |
|
|
ASTI
1914
PUT
DELISTED
ASCENT SOLAR TECHNOLOGIES INC COM STK
ASTI
| $53K | ﹤0.01% |
200
| – | – |
|
1915
CALL
Analog Devices
ADI
$175B
| $52K | ﹤0.01% |
161
+117
| +266% | +$6.25K |
|
1916
CALL
Aramark
ARMK
$15.2B
| $52K | ﹤0.01% |
+262
| New | +$6.01K |
|
1917
CALL
Becton Dickinson
BDX
$49.1B
| $52K | ﹤0.01% |
250
+216
| +635% | +$30.6K |
|
1918
CALL
CarMax
KMX
$8.62B
| $52K | ﹤0.01% |
187
-107
| -36% | -$5.05K |
|
1919
PUT
Lam Research
LRCX
$400B
| $52K | ﹤0.01% |
4,460
-2,430
| -35% | -$17.7K |
|
1920
PUT
Safe Bulkers
SB
$913M
| $52K | ﹤0.01% |
131
-67
| -34% | -$40 |
|
1921
CALL
Wabtec
WAB
$48.2B
| $52K | ﹤0.01% |
63
+11
| +21% | +$762 |
|
1922
Zumiez
ZUMZ
$299M
| $52K | ﹤0.01% |
2,628
+1,970
| +299% | +$37K |
|
|
NBIS
1923
PUT
Nebius Group N.V.
NBIS
$65.9B
| $52K | ﹤0.01% |
173
+102
| +144% | +$1.4K |
|
|
HYLD
1924
DELISTED
High Yield ETF
HYLD
| $52K | ﹤0.01% |
+1,648
| New | +$51.6K |
|
|
GLOG
1925
CALL
DELISTED
GASLOG LTD
GLOG
| $52K | ﹤0.01% |
473
+154
| +48% | +$1.33K |
|
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 1,503 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 Miscellaneous at 60% of assets, up from 52% a quarter earlier, followed by Technology and Communication Services.
- 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 1,503 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.