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 | |
|---|---|---|---|---|---|---|
1901
PUT
Children's Place
PLCE
$53.6M
| $1M | ﹤0.01% |
105
-567
| -84% | -$57.9K |
|
|
RUTH
1902
CALL
DELISTED
Ruth's Hospitality Group, Inc.
RUTH
| $1M | ﹤0.01% |
441
+387
| +717% | +$9.46K |
|
1903
CALL
APA Corp
APA
$12.8B
| $999K | ﹤0.01% |
345
-1,273
| -79% | -$39.6K |
|
1904
Charter Communications
CHTR
$14.7B
| $995K | ﹤0.01% |
+2,519
| New | +$944K |
|
1905
Rogers Corp
ROG
$2.33B
| $995K | ﹤0.01% |
+5,770
| New | +$940K |
|
1906
CALL
American Financial Group
AFG
$11.9B
| $993K | ﹤0.01% |
97
-42
| -30% | -$4.22K |
|
1907
WisdomTree Japan Hedged Equity Fund
DXJ
$7.23B
| $993K | ﹤0.01% |
20,391
-14,523
| -42% | -$724K |
|
|
HI
1908
CALL
DELISTED
Hillenbrand
HI
| $993K | ﹤0.01% |
251
-3
| -1% | -$121 |
|
|
HUYA
1909
Huya Inc
HUYA
$542M
| $993K | ﹤0.01% |
40,224
-17,674
| -31% | -$406K |
|
|
CLVS
1910
DELISTED
Clovis Oncology, Inc.
CLVS
| $992K | ﹤0.01% |
66,740
+32,650
| +96% | +$590K |
|
1911
PUT
Apollo Global Management
APO
$70.7B
| $991K | ﹤0.01% |
289
-34
| -11% | -$1.08K |
|
1912
CALL
Teradyne
TER
$54.8B
| $991K | ﹤0.01% |
207
-734
| -78% | -$33.3K |
|
1913
CALL
Allegiant Air
ALGT
$2.64B
| $990K | ﹤0.01% |
69
+15
| +28% | +$2.1K |
|
1914
PUT
Tucows
TCX
$97.1M
| $988K | ﹤0.01% |
162
-61
| -27% | -$4.39K |
|
|
WWE
1915
DELISTED
World Wrestling Entertainment
WWE
| $988K | ﹤0.01% |
13,690
-5,238
| -28% | -$429K |
|
1916
CALL
AMN Healthcare
AMN
$1.28B
| $987K | ﹤0.01% |
182
+92
| +102% | +$4.67K |
|
1917
PUT
Danaher
DHR
$135B
| $986K | ﹤0.01% |
78
-231
| -75% | -$27.3K |
|
|
RDUS
1918
CALL
DELISTED
Radius Health, Inc.
RDUS
| $986K | ﹤0.01% |
405
+69
| +21% | +$1.51K |
|
1919
PUT
Nokia
NOK
$50.8B
| $984K | ﹤0.01% |
1,965
+1,331
| +210% | +$7.01K |
|
1920
PUT
Transocean
RIG
$5.92B
| $983K | ﹤0.01% |
1,535
-823
| -35% | -$6.11K |
|
1921
CALL
Markel Group
MKL
$25B
| $980K | ﹤0.01% |
+9
| New | +$9.43K |
|
1922
PUT
Neurocrine Biosciences
NBIX
$17.7B
| $979K | ﹤0.01% |
116
-284
| -71% | -$23.3K |
|
1923
CALL
Nexstar Media Group
NXST
$5.6B
| $979K | ﹤0.01% |
97
+38
| +64% | +$4.08K |
|
1924
CALL
Nutrien
NTR
$32.7B
| $978K | ﹤0.01% |
183
-62
| -25% | -$3.24K |
|
|
WORK
1925
PUT
DELISTED
Slack Technologies, Inc.
WORK
| $978K | ﹤0.01% |
+261
| New | +$9.61K |
|
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.