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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1976
PUT
Yum China
YUMC
$14.9B
| $949K | ﹤0.01% |
209
+87
| +71% | +$3.88K |
|
1977
PUT
Annaly Capital Management
NLY
$16.9B
| $947K | ﹤0.01% |
269
+130
| +94% | +$4.68K |
|
1978
Petrobras
PBR
$121B
| $947K | ﹤0.01% |
65,464
-109,164
| -63% | -$1.6M |
|
|
MMP
1979
PUT
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $947K | ﹤0.01% |
143
-148
| -51% | -$9.74K |
|
1980
CALL
Howard Hughes
HHH
$3.93B
| $946K | ﹤0.01% |
77
-58
| -43% | -$7.17K |
|
|
AAWW
1981
CALL
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
| $946K | ﹤0.01% |
375
+236
| +170% | +$7.71K |
|
1982
Radware
RDWR
$1.24B
| $944K | ﹤0.01% |
38,936
-32,784
| -46% | -$819K |
|
1983
CALL
Sturm, Ruger & Co
RGR
$610M
| $943K | ﹤0.01% |
226
+151
| +201% | +$7.06K |
|
|
SGI
1984
Somnigroup International
SGI
$15.1B
| $942K | ﹤0.01% |
+48,824
| New | +$936K |
|
|
BIG
1985
CALL
DELISTED
Big Lots, Inc.
BIG
| $940K | ﹤0.01% |
384
+225
| +142% | +$5.36K |
|
1986
PUT
Lithia Motors
LAD
$7.78B
| $939K | ﹤0.01% |
71
+52
| +274% | +$6.64K |
|
1987
CALL
Banco Santander
SAN
$194B
| $939K | ﹤0.01% |
2,438
+2,410
| +8,607% | +$9.57K |
|
1988
CALL
Cullen/Frost Bankers
CFR
$10.3B
| $938K | ﹤0.01% |
106
+93
| +715% | +$8.24K |
|
1989
Extra Space Storage
EXR
$31.2B
| $936K | ﹤0.01% |
+8,019
| New | +$927K |
|
1990
PUT
Cleveland-Cliffs
CLF
$6.81B
| $934K | ﹤0.01% |
1,295
-233
| -15% | -$2.1K |
|
|
LK
1991
CALL
DELISTED
Luckin Coffee Inc. American Depositary Shares
LK
| $934K | ﹤0.01% |
492
+229
| +87% | +$4.85K |
|
1992
PUT
Cincinnati Financial
CINF
$28.3B
| $933K | ﹤0.01% |
80
-545
| -87% | -$59.9K |
|
1993
iShares MSCI EAFE Min Vol Factor ETF
EFAV
$5.22B
| $932K | ﹤0.01% |
12,727
+8,470
| +199% | +$613K |
|
1994
CALL
Molina Healthcare
MOH
$10.3B
| $932K | ﹤0.01% |
85
-60
| -41% | -$7.77K |
|
1995
PUT
World Acceptance Corp
WRLD
$950M
| $930K | ﹤0.01% |
73
+55
| +306% | +$7.78K |
|
|
HUYA
1996
Huya Inc
HUYA
$542M
| $929K | ﹤0.01% |
39,316
-908
| -2% | -$21.4K |
|
1997
CALL
Commerce Bancshares
CBSH
$8.5B
| $927K | ﹤0.01% |
+215
| New | +$8.97K |
|
1998
iRhythm Holdings
IRTC
$3.59B
| $926K | ﹤0.01% |
12,503
+12,196
| +3,973% | +$945K |
|
1999
NCR Voyix
VYX
$1.06B
| $926K | ﹤0.01% |
47,860
+36,443
| +319% | +$704K |
|
|
HA
2000
PUT
DELISTED
Hawaiian Holdings, Inc.
HA
| $926K | ﹤0.01% |
353
-296
| -46% | -$7.77K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.