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 | |
|---|---|---|---|---|---|---|
|
AXDX
1801
CALL
DELISTED
Accelerate Diagnostics
AXDX
| $1.12M | ﹤0.01% |
49
+7
| +17% | +$1.37K |
|
1802
Liberty Global Class A
LBTYA
$3.31B
| $1.12M | ﹤0.01% |
41,419
+10,870
| +36% | +$287K |
|
|
BBBY
1803
PUT
Bed Bath & Beyond
BBBY
$473M
| $1.11M | ﹤0.01% |
1,087
-16
| -1% | -$150 |
|
1804
PUT
Chemours
CC
$2.59B
| $1.11M | ﹤0.01% |
463
+77
| +20% | +$2.27K |
|
|
CLDR
1805
PUT
DELISTED
Cloudera, Inc.
CLDR
| $1.11M | ﹤0.01% |
2,113
-1,181
| -36% | -$10.9K |
|
1806
CALL
Cenovus Energy
CVE
$54.6B
| $1.11M | ﹤0.01% |
1,258
+236
| +23% | +$2.13K |
|
1807
CALL
Goodyear
GT
$2.07B
| $1.11M | ﹤0.01% |
723
+373
| +107% | +$6.3K |
|
|
FL
1808
DELISTED
Foot Locker
FL
| $1.1M | ﹤0.01% |
26,362
+8,393
| +47% | +$437K |
|
1809
PUT
Jacobs Solutions
J
$15.9B
| $1.1M | ﹤0.01% |
158
-553
| -78% | -$35.7K |
|
1810
Simon Property Group
SPG
$74.5B
| $1.1M | ﹤0.01% |
+6,882
| New | +$1.19M |
|
1811
CALL
HF Sinclair
DINO
$15.9B
| $1.1M | ﹤0.01% |
237
-10
| -4% | -$447 |
|
1812
Signet Jewelers
SIG
$3.55B
| $1.09M | ﹤0.01% |
61,277
+50,867
| +489% | +$1.09M |
|
1813
CALL
British American Tobacco
BTI
$132B
| $1.09M | ﹤0.01% |
313
-83
| -21% | -$3.14K |
|
|
SCHW
1814
Charles Schwab
SCHW
$177B
| $1.09M | ﹤0.01% |
+27,166
| New | +$1.18M |
|
|
SC
1815
PUT
DELISTED
SANTANDER CONSUMER USA HOLDINGS INC
SC
| $1.09M | ﹤0.01% |
455
+431
| +1,796% | +$9.59K |
|
1816
Hilton Grand Vacations
HGV
$3.84B
| $1.09M | ﹤0.01% |
34,227
+24,824
| +264% | +$738K |
|
1817
PUT
Teradata
TDC
$2.68B
| $1.09M | ﹤0.01% |
304
+220
| +262% | +$8.58K |
|
1818
Caesars Entertainment
CZR
$6.1B
| $1.09M | ﹤0.01% |
23,626
+15,601
| +194% | +$765K |
|
1819
Fluor
FLR
$7.29B
| $1.09M | ﹤0.01% |
+32,287
| New | +$1.08M |
|
1820
VICI Properties
VICI
$29.4B
| $1.09M | ﹤0.01% |
+49,341
| New | +$1.1M |
|
1821
DaVita
DVA
$15.1B
| $1.08M | ﹤0.01% |
19,303
-15,837
| -45% | -$820K |
|
|
BERY
1822
DELISTED
Berry Global Group, Inc.
BERY
| $1.08M | ﹤0.01% |
22,426
+10,592
| +90% | +$510K |
|
1823
PUT
Aramark
ARMK
$15B
| $1.08M | ﹤0.01% |
416
+266
| +177% | +$6.22K |
|
1824
PPG Industries
PPG
$25.9B
| $1.08M | ﹤0.01% |
9,260
-6,052
| -40% | -$690K |
|
1825
XPO
XPO
$25B
| $1.08M | ﹤0.01% |
54,049
+45,485
| +531% | +$926K |
|
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.