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 | |
|---|---|---|---|---|---|---|
1726
CALL
Mohawk Industries
MHK
$6.9B
| $1.22M | ﹤0.01% |
83
-21
| -20% | -$2.91K |
|
1727
PUT
Asbury Automotive
ABG
$4.19B
| $1.22M | ﹤0.01% |
145
+143
| +7,150% | +$11.2K |
|
1728
PUT
Encompass Health
EHC
$11.2B
| $1.22M | ﹤0.01% |
243
-353
| -59% | -$17.1K |
|
1729
PUT
International Paper
IP
$22.3B
| $1.22M | ﹤0.01% |
298
-474
| -61% | -$20.1K |
|
1730
Restaurant Brands International
QSR
$25.1B
| $1.22M | ﹤0.01% |
17,507
-36,000
| -67% | -$2.41M |
|
1731
PUT
Boston Scientific
BSX
$65.8B
| $1.22M | ﹤0.01% |
283
-247
| -47% | -$9.5K |
|
|
VRS
1732
PUT
DELISTED
Verso Corporation
VRS
| $1.22M | ﹤0.01% |
638
+583
| +1,060% | +$11.8K |
|
|
PCMI
1733
CALL
DELISTED
PCM, Inc
PCMI
| $1.22M | ﹤0.01% |
347
+331
| +2,069% | +$9.76K |
|
1734
PUT
National Grid
NGG
$82.7B
| $1.21M | ﹤0.01% |
258
-199
| -44% | -$9.34K |
|
|
CSOD
1735
CALL
DELISTED
Cornerstone OnDemand, Inc.
CSOD
| $1.21M | ﹤0.01% |
209
+96
| +85% | +$5.19K |
|
|
CZR
1736
PUT
DELISTED
Caesars Entertainment Corporation
CZR
| $1.21M | ﹤0.01% |
1,024
+121
| +13% | +$1.15K |
|
1737
CALL
HDFC Bank
HDB
$119B
| $1.21M | ﹤0.01% |
372
-668
| -64% | -$20.1K |
|
|
AL
1738
CALL
DELISTED
Air Lease Corp
AL
| $1.21M | ﹤0.01% |
292
+270
| +1,227% | +$10.3K |
|
1739
PUT
Parker-Hannifin
PH
$125B
| $1.21M | ﹤0.01% |
71
-186
| -72% | -$32.1K |
|
|
UFS
1740
CALL
DELISTED
DOMTAR CORPORATION (New)
UFS
| $1.21M | ﹤0.01% |
271
+3
| +1% | +$137 |
|
1741
CALL
Invesco
IVZ
$13.3B
| $1.2M | ﹤0.01% |
588
-15
| -2% | -$311 |
|
1742
iShares MSCI Chile ETF
ECH
$1.01B
| $1.2M | ﹤0.01% |
+29,413
| New | +$1.22M |
|
|
UNIT
1743
PUT
Uniti Group
UNIT
$2.63B
| $1.2M | ﹤0.01% |
1,264
+664
| +111% | +$7.25K |
|
|
LSI
1744
DELISTED
Life Storage, Inc.
LSI
| $1.2M | ﹤0.01% |
18,923
-3,315
| -15% | -$213K |
|
1745
CALL
Innovative Industrial Properties
IIPR
$1.78B
| $1.2M | ﹤0.01% |
97
+90
| +1,286% | +$8.25K |
|
1746
PUT
Alnylam Pharmaceuticals
ALNY
$36.3B
| $1.2M | ﹤0.01% |
165
-208
| -56% | -$16K |
|
1747
CALL
Upland Software
UPLD
$12M
| $1.2M | ﹤0.01% |
26
+6
| +30% | +$2.75K |
|
1748
PUT
American Electric Power
AEP
$73.7B
| $1.2M | ﹤0.01% |
136
+43
| +46% | +$3.71K |
|
1749
CALL
CrowdStrike
CRWD
$187B
| $1.2M | ﹤0.01% |
+700
| New | +$11.9K |
|
1750
CALL
Myriad Genetics
MYGN
$530M
| $1.19M | ﹤0.01% |
430
+281
| +189% | +$7.94K |
|
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.