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 | |
|---|---|---|---|---|---|---|
1751
Bread Financial
BFH
$4.21B
| $1.23M | ﹤0.01% |
12,005
+5,756
| +92% | +$649K |
|
1752
PUT
Ciena
CIEN
$55.3B
| $1.23M | ﹤0.01% |
313
-925
| -75% | -$38.8K |
|
|
PVG
1753
CALL
DELISTED
PRETIUM RESOURCES INC.
PVG
| $1.23M | ﹤0.01% |
1,066
+733
| +220% | +$8.7K |
|
1754
CALL
Synaptics
SYNA
$4.41B
| $1.22M | ﹤0.01% |
306
+204
| +200% | +$6.88K |
|
1755
PUT
Marcus Corp
MCS
$732M
| $1.22M | ﹤0.01% |
+330
| New | +$11.4K |
|
1756
PUT
WPP
WPP
$4.04B
| $1.22M | ﹤0.01% |
195
+182
| +1,400% | +$10.9K |
|
1757
CALL
FIVE9
FIVN
$1.77B
| $1.22M | ﹤0.01% |
227
+168
| +285% | +$9.45K |
|
1758
Neurocrine Biosciences
NBIX
$17.7B
| $1.22M | ﹤0.01% |
13,502
+5,176
| +62% | +$484K |
|
1759
State Street SPDR Portfolio S&P 1500 Composite Stock Market ETF
SPTM
$13.5B
| $1.22M | ﹤0.01% |
33,091
+31,829
| +2,522% | +$1.17M |
|
1760
Kohl's
KSS
$2.03B
| $1.21M | ﹤0.01% |
24,423
-10,164
| -29% | -$498K |
|
1761
CALL
Ally Financial
ALLY
$13.1B
| $1.21M | ﹤0.01% |
365
+1
| +0.3% | +$32 |
|
1762
CALL
Cognex
CGNX
$10.3B
| $1.21M | ﹤0.01% |
246
+180
| +273% | +$8.12K |
|
1763
CALL
Edgewell Personal Care
EPC
$1.27B
| $1.21M | ﹤0.01% |
372
+365
| +5,214% | +$10.9K |
|
1764
CALL
Icahn Enterprises
IEP
$5.17B
| $1.21M | ﹤0.01% |
188
-10
| -5% | -$711 |
|
1765
Lear
LEA
$7.19B
| $1.21M | ﹤0.01% |
10,226
-3,608
| -26% | -$439K |
|
|
MNDT
1766
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $1.21M | ﹤0.01% |
90,335
+42,702
| +90% | +$606K |
|
|
BPMC
1767
CALL
DELISTED
Blueprint Medicines
BPMC
| $1.2M | ﹤0.01% |
164
-157
| -49% | -$13.6K |
|
1768
Dollar General
DG
$25.9B
| $1.2M | ﹤0.01% |
7,575
-14,700
| -66% | -$2.13M |
|
|
SIX
1769
PUT
DELISTED
Six Flags Entertainment Corp.
SIX
| $1.2M | ﹤0.01% |
237
+181
| +323% | +$9.82K |
|
|
UN
1770
DELISTED
Unilever NV New York Registry Shares
UN
| $1.2M | ﹤0.01% |
20,056
-5,298
| -21% | -$318K |
|
|
HTT
1771
CALL
High Templar Tech Ltd
HTT
$377M
| $1.2M | ﹤0.01% |
1,742
+651
| +60% | +$5.24K |
|
1772
PUT
MPLX
MPLX
$59.5B
| $1.2M | ﹤0.01% |
428
-261
| -38% | -$7.65K |
|
1773
CALL
Jack Henry & Associates
JKHY
$10.7B
| $1.2M | ﹤0.01% |
82
-41
| -33% | -$5.81K |
|
|
ZAYO
1774
PUT
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $1.2M | ﹤0.01% |
353
+186
| +111% | +$6.26K |
|
|
SEM
1775
CALL
DELISTED
Select Medical
SEM
| $1.19M | ﹤0.01% |
1,338
+1,293
| +2,873% | +$11.3K |
|
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.