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 | |
|---|---|---|---|---|---|---|
3551
PUT
Helen of Troy
HELE
$672M
| $182K | ﹤0.01% |
14
-404
| -97% | -$52.9K |
|
|
VGR
3552
CALL
DELISTED
Vector Group Ltd.
VGR
| $182K | ﹤0.01% |
277
+185
| +201% | +$1.24K |
|
3553
CALL
Diodes
DIOD
$3.69B
| $181K | ﹤0.01% |
50
-161
| -76% | -$5.69K |
|
3554
PUT
Genworth Financial
GNW
$3.85B
| $181K | ﹤0.01% |
489
-269
| -35% | -$953 |
|
3555
Garrett Motion
GTX
$5.6B
| $181K | ﹤0.01% |
11,803
+969
| +9% | +$16.4K |
|
3556
CALL
Immersion
IMMR
$254M
| $181K | ﹤0.01% |
239
+162
| +210% | +$1.37K |
|
3557
Kennametal
KMT
$2.71B
| $181K | ﹤0.01% |
4,900
+2,630
| +116% | +$95.4K |
|
3558
PUT
Manitowoc
MTW
$527M
| $181K | ﹤0.01% |
102
+78
| +325% | +$1.29K |
|
3559
Ryanair
RYAAY
$31B
| $181K | ﹤0.01% |
+7,085
| New | +$201K |
|
3560
PUT
SM Energy
SM
$7.11B
| $181K | ﹤0.01% |
145
+138
| +1,971% | +$2K |
|
3561
Teleflex
TFX
$5.94B
| $181K | ﹤0.01% |
+549
| New | +$166K |
|
3562
PUT
Weyerhaeuser
WY
$17.7B
| $181K | ﹤0.01% |
69
-427
| -86% | -$10.9K |
|
|
PENG
3563
Penguin Solutions Inc
PENG
$2.47B
| $181K | ﹤0.01% |
15,750
+1,802
| +13% | +$18.2K |
|
|
VCRA
3564
CALL
DELISTED
VOCERA COMMUNICATIONS, INC.
VCRA
| $181K | ﹤0.01% |
57
-15
| -21% | -$478 |
|
|
BPY
3565
PUT
DELISTED
Brookfield Property Partners L.P. Limited Partnership Units
BPY
| $181K | ﹤0.01% |
96
-44
| -31% | -$878 |
|
3566
iShares MSCI Spain ETF
EWP
$2.08B
| $180K | ﹤0.01% |
6,256
-820
| -12% | -$23.9K |
|
3567
CALL
Generac Holdings
GNRC
$11.5B
| $180K | ﹤0.01% |
26
-317
| -92% | -$18.5K |
|
3568
CALL
Heritage Insurance Holdings
HRTG
$905M
| $180K | ﹤0.01% |
117
+50
| +75% | +$736 |
|
3569
Old Dominion Freight Line
ODFL
$47.1B
| $180K | ﹤0.01% |
+3,621
| New | +$176K |
|
3570
PUT
Capitol Federal Financial
CFFN
$1.09B
| $179K | ﹤0.01% |
+130
| New | +$1.76K |
|
3571
CALL
Crocs
CROX
$6.75B
| $179K | ﹤0.01% |
91
-170
| -65% | -$3.94K |
|
3572
Essent Group
ESNT
$6.21B
| $179K | ﹤0.01% |
3,830
-7,304
| -66% | -$344K |
|
3573
PUT
Forte Biosciences
FBRX
$1.57B
| $179K | ﹤0.01% |
+1
| New | +$2.96K |
|
3574
CALL
Global Partners
GLP
$1.65B
| $179K | ﹤0.01% |
90
+5
| +6% | +$99 |
|
3575
PUT
Nomad Foods
NOMD
$1.7B
| $179K | ﹤0.01% |
84
+82
| +4,100% | +$1.72K |
|
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.