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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3426
PUT
Packaging Corp of America
PKG
$22.6B
| $209K | ﹤0.01% |
22
-19
| -46% | -$1.83K |
|
3427
PUT
Southern Copper
SCCO
$140B
| $209K | ﹤0.01% |
58
-19
| -25% | -$661 |
|
3428
CALL
Nabors Industries
NBR
$1.12B
| $208K | ﹤0.01% |
14
-1
| -7% | -$160 |
|
3429
Semtech
SMTC
$10.4B
| $208K | ﹤0.01% |
4,334
+3,406
| +367% | +$165K |
|
3430
Ametek
AME
$55.3B
| $207K | ﹤0.01% |
2,282
-9,418
| -80% | -$807K |
|
3431
CALL
Ascendis Pharma A/S
ASND
$16.7B
| $207K | ﹤0.01% |
18
-203
| -92% | -$24.3K |
|
3432
CALL
Camping World
CWH
$399M
| $207K | ﹤0.01% |
167
+8
| +5% | +$103 |
|
3433
Consolidated Edison
ED
$41.3B
| $207K | ﹤0.01% |
2,364
-12,966
| -85% | -$1.12M |
|
3434
National Vision
EYE
$1.75B
| $207K | ﹤0.01% |
+6,756
| New | +$194K |
|
3435
F5
FFIV
$22.8B
| $207K | ﹤0.01% |
1,427
+827
| +138% | +$124K |
|
3436
PUT
Karyopharm Therapeutics
KPTI
$161M
| $207K | ﹤0.01% |
23
+13
| +130% | +$1.04K |
|
3437
PUT
Manhattan Associates
MANH
$9.95B
| $207K | ﹤0.01% |
30
+24
| +400% | +$1.54K |
|
|
WLH
3438
CALL
DELISTED
WILLIAM LYON HOMES
WLH
| $207K | ﹤0.01% |
114
-115
| -50% | -$2.07K |
|
3439
PUT
Starwood Property Trust
STWD
$6.18B
| $206K | ﹤0.01% |
91
+74
| +435% | +$1.68K |
|
|
TGI
3440
CALL
DELISTED
Triumph Group
TGI
| $206K | ﹤0.01% |
90
+3
| +3% | +$64 |
|
3441
PUT
Unisys
UIS
$250M
| $206K | ﹤0.01% |
212
+158
| +293% | +$1.63K |
|
|
PVG
3442
DELISTED
PRETIUM RESOURCES INC.
PVG
| $206K | ﹤0.01% |
20,639
-12,278
| -37% | -$104K |
|
3443
PUT
SunCoke Energy
SXC
$779M
| $205K | ﹤0.01% |
+232
| New | +$1.91K |
|
|
HT
3444
PUT
DELISTED
Hersha Hospitality Trust Priority Class A Common Shares of Beneficial Interest
HT
| $205K | ﹤0.01% |
124
+112
| +933% | +$1.98K |
|
|
FLOW
3445
PUT
DELISTED
SPX FLOW, Inc.
FLOW
| $205K | ﹤0.01% |
+49
| New | +$1.81K |
|
3446
Eldorado Gold
EGO
$8.4B
| $204K | ﹤0.01% |
35,123
+31,587
| +893% | +$133K |
|
3447
MBIA
MBI
$278M
| $203K | ﹤0.01% |
21,886
-24,864
| -53% | -$232K |
|
3448
PUT
TC Energy
TRP
$70.5B
| $203K | ﹤0.01% |
41
-80
| -66% | -$3.84K |
|
3449
CALL
Globant
GLOB
$1.52B
| $202K | ﹤0.01% |
20
+13
| +186% | +$1.13K |
|
|
3450
PUT
Globant
GLOB
$1.52B
| $202K | ﹤0.01% |
20
-2
| -9% | -$174 |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.