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 | |
|---|---|---|---|---|---|---|
576
PUT
Vail Resorts
MTN
$5.13B
| $6.16M | 0.02% |
276
+82
| +42% | +$18.2K |
|
577
State Street SPDR S&P Metals & Mining ETF
XME
$4.11B
| $6.14M | 0.02% |
216,471
+157,116
| +265% | +$4.37M |
|
578
PUT
Arista Networks
ANET
$222B
| $6.13M | 0.02% |
3,776
-864
| -19% | -$15K |
|
579
3M
MMM
$87.5B
| $6.12M | 0.02% |
+42,245
| New | +$6.5M |
|
580
PUT
Honeywell
HON
$78B
| $6.1M | 0.02% |
484
-392
| -45% | -$62.4K |
|
581
PUT
Estee Lauder
EL
$28.9B
| $6.1M | 0.02% |
333
-304
| -48% | -$51.9K |
|
|
DATA
582
CALL
DELISTED
Tableau Software, Inc.
DATA
| $6.09M | 0.02% |
367
+69
| +23% | +$9.07K |
|
583
PUT
Idexx Laboratories
IDXX
$42.5B
| $6.08M | 0.02% |
221
+88
| +66% | +$21.7K |
|
584
PUT
Dollar General
DG
$25.4B
| $6.08M | 0.02% |
450
+57
| +15% | +$7.2K |
|
585
PUT
Yum! Brands
YUM
$40.6B
| $6.08M | 0.02% |
549
+514
| +1,469% | +$53.4K |
|
|
ARRY
586
CALL
DELISTED
Array Biopharma Inc
ARRY
| $6.05M | 0.02% |
1,307
-1,088
| -45% | -$30.5K |
|
587
CALL
Ashland
ASH
$3.05B
| $6.05M | 0.02% |
757
+613
| +426% | +$47.4K |
|
588
CALL
Vale
VALE
$63.1B
| $6.03M | 0.02% |
4,490
-199
| -4% | -$2.55K |
|
589
CALL
Humana
HUM
$47.4B
| $6.02M | 0.02% |
227
+33
| +17% | +$8.37K |
|
|
WWE
590
PUT
DELISTED
World Wrestling Entertainment
WWE
| $6.01M | 0.02% |
833
-154
| -16% | -$12.6K |
|
591
General Mills
GIS
$19B
| $6M | 0.02% |
114,158
+59,365
| +108% | +$3.07M |
|
592
PUT
United States Oil Fund
USO
$2.5B
| $5.98M | 0.02% |
621
+327
| +111% | +$32.6K |
|
593
PUT
Best Buy
BBY
$17.8B
| $5.97M | 0.02% |
856
-502
| -37% | -$35K |
|
594
PUT
Whirlpool
WHR
$2.31B
| $5.95M | 0.02% |
418
+280
| +203% | +$37.5K |
|
595
CALL
Seagate
STX
$207B
| $5.95M | 0.02% |
1,262
+301
| +31% | +$14K |
|
596
CALL
Oneok
OKE
$58.7B
| $5.95M | 0.02% |
864
+140
| +19% | +$9.44K |
|
597
CALL
PTC
PTC
$13.1B
| $5.92M | 0.02% |
660
-88
| -12% | -$7.89K |
|
598
PUT
NetEase
NTES
$76.9B
| $5.91M | 0.02% |
1,155
-690
| -37% | -$36.6K |
|
599
PUT
Check Point Software Technologies
CHKP
$12.9B
| $5.9M | 0.02% |
510
-228
| -31% | -$26.9K |
|
|
TSS
600
CALL
DELISTED
Total System Services, Inc.
TSS
| $5.87M | 0.02% |
458
-133
| -23% | -$14.6K |
|
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.