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 | |
|---|---|---|---|---|---|---|
3526
PUT
Peabody Energy
BTU
$2.83B
| $207K | ﹤0.01% |
141
+140
| +14,000% | +$2.73K |
|
3527
CALL
EPR Properties
EPR
$4.92B
| $207K | ﹤0.01% |
27
-57
| -68% | -$4.34K |
|
3528
CALL
Fulton Financial
FULT
$4.73B
| $207K | ﹤0.01% |
128
-98
| -43% | -$1.59K |
|
3529
PUT
Heron Therapeutics
HRTX
$92M
| $207K | ﹤0.01% |
112
-46
| -29% | -$847 |
|
3530
PUT
MillerKnoll
MLKN
$1.61B
| $207K | ﹤0.01% |
45
| – | – |
|
3531
uniQure
QURE
$2.52B
| $207K | ﹤0.01% |
5,278
-15,166
| -74% | -$875K |
|
3532
CALL
Turning Point Brands
TPB
$1.56B
| $207K | ﹤0.01% |
90
-14
| -13% | -$533 |
|
3533
PUT
Viking Therapeutics
VKTX
$3.93B
| $207K | ﹤0.01% |
301
-209
| -41% | -$1.55K |
|
3534
PUT
Angi Inc
ANGI
$252M
| $206K | ﹤0.01% |
29
+14
| +93% | +$1.44K |
|
3535
Nice
NICE
$5.94B
| $206K | ﹤0.01% |
1,435
+989
| +222% | +$148K |
|
3536
PUT
SM Energy
SM
$7.11B
| $206K | ﹤0.01% |
213
+68
| +47% | +$693 |
|
|
B
3537
PUT
DELISTED
Barnes Group Inc.
B
| $206K | ﹤0.01% |
+40
| New | +$2.01K |
|
|
CCXI
3538
DELISTED
ChemoCentryx, Inc.
CCXI
| $206K | ﹤0.01% |
30,394
-18,016
| -37% | -$135K |
|
3539
PUT
Ryanair
RYAAY
$31.1B
| $205K | ﹤0.01% |
78
-242
| -76% | -$6K |
|
3540
CALL
Energy Fuels
UUUU
$2.83B
| $205K | ﹤0.01% |
1,064
+1,018
| +2,213% | +$2.03K |
|
|
PE
3541
DELISTED
PARSLEY ENERGY INC
PE
| $205K | ﹤0.01% |
12,206
+3,733
| +44% | +$64.1K |
|
3542
PUT
Hewlett Packard
HPE
$60.4B
| $204K | ﹤0.01% |
135
+50
| +59% | +$711 |
|
3543
PUT
Alliant Energy
LNT
$19.1B
| $204K | ﹤0.01% |
38
+29
| +322% | +$1.49K |
|
3544
Red Robin
RRGB
$139M
| $204K | ﹤0.01% |
+6,135
| New | +$201K |
|
|
MDRX
3545
DELISTED
Veradigm Inc. Common Stock
MDRX
| $204K | ﹤0.01% |
18,655
+7,381
| +65% | +$75.8K |
|
|
MNK
3546
PUT
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $204K | ﹤0.01% |
850
-608
| -42% | -$3.11K |
|
3547
Lowe's Companies
LOW
$122B
| $203K | ﹤0.01% |
+1,850
| New | +$195K |
|
3548
Packaging Corp of America
PKG
$22.6B
| $203K | ﹤0.01% |
+1,922
| New | +$195K |
|
3549
Simply Good Foods
SMPL
$941M
| $203K | ﹤0.01% |
+7,021
| New | +$196K |
|
3550
CALL
STAAR Surgical
STAA
$1.13B
| $203K | ﹤0.01% |
79
+62
| +365% | +$1.88K |
|
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.