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 | |
|---|---|---|---|---|---|---|
|
AYX
1376
CALL
DELISTED
Alteryx Inc
AYX
| $1.82M | 0.01% |
167
-91
| -35% | -$8.28K |
|
|
CRC
1377
CALL
DELISTED
California Resources Corporation
CRC
| $1.82M | 0.01% |
926
-442
| -32% | -$9.41K |
|
1378
CALL
Enbridge
ENB
$124B
| $1.82M | 0.01% |
505
+352
| +230% | +$12.8K |
|
1379
CALL
Coty
COTY
$2.33B
| $1.82M | 0.01% |
1,358
-190
| -12% | -$2.34K |
|
|
WRK
1380
PUT
DELISTED
WestRock Company
WRK
| $1.82M | 0.01% |
499
+461
| +1,213% | +$16.9K |
|
1381
CALL
Amplify Junior Silver Miners ETF
SILJ
$3.27B
| $1.82M | 0.01% |
594
-80
| -12% | -$636 |
|
1382
PUT
Tapestry
TPR
$28.8B
| $1.82M | 0.01% |
573
+112
| +24% | +$3.49K |
|
1383
PUT
Archer Daniels Midland
ADM
$41.4B
| $1.81M | 0.01% |
445
-531
| -54% | -$22K |
|
|
PRAH
1384
PUT
DELISTED
PRA Health Sciences, Inc.
PRAH
| $1.81M | 0.01% |
183
+18
| +11% | +$1.72K |
|
1385
CALL
Coherent
COHR
$55.2B
| $1.81M | ﹤0.01% |
496
+123
| +33% | +$4.49K |
|
1386
iShares Russell 2000 Value ETF
IWN
$14.4B
| $1.81M | ﹤0.01% |
15,028
+14,683
| +4,256% | +$1.77M |
|
1387
Newmont
NEM
$98.2B
| $1.8M | ﹤0.01% |
+46,914
| New | +$1.59M |
|
1388
CALL
Bank of Montreal
BMO
$125B
| $1.79M | ﹤0.01% |
238
-70
| -23% | -$5.36K |
|
1389
CALL
Ross Stores
ROST
$76.6B
| $1.79M | ﹤0.01% |
181
-120
| -40% | -$11.7K |
|
1390
CALL
TG Therapeutics
TGTX
$8.58B
| $1.79M | ﹤0.01% |
2,075
+1,205
| +139% | +$9.11K |
|
1391
CALL
Knight Transportation
KNX
$11.8B
| $1.79M | ﹤0.01% |
546
-870
| -61% | -$27.8K |
|
|
ITCI
1392
CALL
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $1.79M | ﹤0.01% |
1,380
-51
| -4% | -$654 |
|
1393
CALL
Fair Isaac
FICO
$28.7B
| $1.79M | ﹤0.01% |
57
-11
| -16% | -$3.19K |
|
|
BLD
1394
CALL
DELISTED
TopBuild
BLD
| $1.79M | ﹤0.01% |
216
-4
| -2% | -$306 |
|
1395
CALL
Entegris
ENTG
$19.7B
| $1.79M | ﹤0.01% |
479
+37
| +8% | +$1.4K |
|
1396
CALL
Ionis Pharmaceuticals
IONS
$9.35B
| $1.79M | ﹤0.01% |
278
+39
| +16% | +$2.76K |
|
|
ABMD
1397
DELISTED
Abiomed Inc
ABMD
| $1.78M | ﹤0.01% |
+6,844
| New | +$1.82M |
|
1398
CALL
Royal Caribbean
RCL
$78.7B
| $1.78M | ﹤0.01% |
147
-269
| -65% | -$32.8K |
|
|
HA
1399
PUT
DELISTED
Hawaiian Holdings, Inc.
HA
| $1.78M | ﹤0.01% |
649
+70
| +12% | +$1.9K |
|
1400
PUT
Freshpet
FRPT
$2.83B
| $1.78M | ﹤0.01% |
391
+77
| +25% | +$3.49K |
|
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.