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 | |
|---|---|---|---|---|---|---|
1576
CALL
Williams-Sonoma
WSM
$26.7B
| $1.5M | ﹤0.01% |
442
+48
| +12% | +$1.59K |
|
|
GRMN
1577
PUT
Garmin
GRMN
$46.9B
| $1.5M | ﹤0.01% |
177
+28
| +19% | +$2.26K |
|
1578
PUT
Hilton Worldwide
HLT
$74B
| $1.5M | ﹤0.01% |
161
-79
| -33% | -$7.5K |
|
1579
PUT
Floor & Decor
FND
$5.81B
| $1.5M | ﹤0.01% |
293
+90
| +44% | +$4.04K |
|
1580
Restaurant Brands International
QSR
$25.1B
| $1.5M | ﹤0.01% |
21,053
+3,546
| +20% | +$261K |
|
1581
PUT
Integer Holdings
ITGR
$3.35B
| $1.5M | ﹤0.01% |
198
+188
| +1,880% | +$14.9K |
|
1582
CALL
Assured Guaranty
AGO
$3.78B
| $1.49M | ﹤0.01% |
336
-327
| -49% | -$14.4K |
|
|
HTZ
1583
PUT
DELISTED
Hertz Global Holdings, Inc.
HTZ
| $1.49M | ﹤0.01% |
1,079
+367
| +52% | +$5.17K |
|
1584
CALL
Celanese
CE
$5.09B
| $1.49M | ﹤0.01% |
122
+54
| +79% | +$6.08K |
|
|
ABMD
1585
DELISTED
Abiomed Inc
ABMD
| $1.49M | ﹤0.01% |
8,374
+1,530
| +22% | +$331K |
|
1586
CSX Corp
CSX
$98.6B
| $1.49M | ﹤0.01% |
+64,467
| New | +$1.5M |
|
1587
CALL
Unilever
UL
$131B
| $1.48M | ﹤0.01% |
220
-110
| -33% | -$7.62K |
|
1588
PUT
Tetra Tech
TTEK
$8.23B
| $1.48M | ﹤0.01% |
+855
| New | +$14K |
|
1589
Logitech
LOGI
$15.2B
| $1.48M | ﹤0.01% |
+36,295
| New | +$1.46M |
|
1590
CALL
Madison Square Garden
MSGS
$9.54B
| $1.48M | ﹤0.01% |
79
-51
| -39% | -$10K |
|
1591
CALL
Devon Energy
DVN
$51.9B
| $1.47M | ﹤0.01% |
613
-1,075
| -64% | -$26.9K |
|
1592
PUT
Icon
ICLR
$12.8B
| $1.47M | ﹤0.01% |
100
+86
| +614% | +$13.2K |
|
|
MASI
1593
CALL
DELISTED
Masimo
MASI
| $1.47M | ﹤0.01% |
99
-145
| -59% | -$22K |
|
1594
CALL
Norwegian Cruise Line
NCLH
$8.89B
| $1.47M | ﹤0.01% |
283
-201
| -42% | -$10.2K |
|
|
KEM
1595
DELISTED
KEMET Corporation
KEM
| $1.47M | ﹤0.01% |
80,604
+39,904
| +98% | +$753K |
|
1596
Vodafone
VOD
$34.9B
| $1.46M | ﹤0.01% |
73,435
-8,381
| -10% | -$152K |
|
1597
iShares Core S&P Mid-Cap ETF
IJH
$123B
| $1.46M | ﹤0.01% |
+37,780
| New | +$1.45M |
|
|
COHR
1598
CALL
DELISTED
Coherent Inc
COHR
| $1.46M | ﹤0.01% |
95
-101
| -52% | -$14.6K |
|
1599
CALL
Aecom
ACM
$9.07B
| $1.46M | ﹤0.01% |
388
+215
| +124% | +$7.74K |
|
1600
PUT
Cooper Companies
COO
$13.7B
| $1.46M | ﹤0.01% |
196
+156
| +390% | +$12.6K |
|
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.