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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
426
PUT
Madison Square Garden
MSGS
$9.49B
| $9.72M | 0.03% |
517
+440
| +571% | +$86.3K |
|
427
State Street Energy Select Sector SPDR ETF
XLE
$39.3B
| $9.71M | 0.03% |
328,118
+74,472
| +29% | +$2.25M |
|
428
PUT
Vertex Pharmaceuticals
VRTX
$120B
| $9.66M | 0.03% |
570
+109
| +24% | +$19.3K |
|
429
CALL
TSMC
TSM
$2.16T
| $9.62M | 0.03% |
2,070
+302
| +17% | +$12.9K |
|
430
CALL
Duke Energy
DUK
$101B
| $9.59M | 0.03% |
1,000
-123
| -11% | -$11.2K |
|
431
CALL
United Rentals
URI
$70.9B
| $9.58M | 0.03% |
769
-168
| -18% | -$20.4K |
|
432
PUT
Agilent Technologies
A
$39.5B
| $9.56M | 0.03% |
1,248
+631
| +102% | +$45.5K |
|
433
PUT
Yum! Brands
YUM
$40.6B
| $9.56M | 0.03% |
843
+294
| +54% | +$33.6K |
|
434
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$744M
| $9.56M | 0.03% |
1,727
+819
| +90% | +$17K |
|
|
SCHW
435
CALL
Charles Schwab
SCHW
$177B
| $9.54M | 0.03% |
2,282
+1,380
| +153% | +$55.7K |
|
436
PUT
Bread Financial
BFH
$4.19B
| $9.51M | 0.03% |
930
+602
| +184% | +$67.8K |
|
437
CALL
Uber
UBER
$140B
| $9.47M | 0.03% |
3,107
-728
| -19% | -$27.4K |
|
438
PUT
S&P Global
SPGI
$124B
| $9.46M | 0.03% |
386
-211
| -35% | -$52.7K |
|
439
CALL
Veeva Systems
VEEV
$29.2B
| $9.45M | 0.03% |
619
-268
| -30% | -$43K |
|
440
CALL
Cheniere Energy
LNG
$57B
| $9.39M | 0.03% |
1,490
+296
| +25% | +$19K |
|
|
WBA
441
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $9.39M | 0.03% |
1,698
-300
| -15% | -$16.1K |
|
442
CALL
Take-Two Interactive
TTWO
$42.7B
| $9.38M | 0.03% |
748
-153
| -17% | -$19.1K |
|
|
ZEN
443
CALL
DELISTED
ZENDESK INC
ZEN
| $9.37M | 0.03% |
1,285
+813
| +172% | +$67K |
|
|
CTXS
444
PUT
DELISTED
Citrix Systems Inc
CTXS
| $9.34M | 0.03% |
968
-619
| -39% | -$59.2K |
|
445
PUT
Illinois Tool Works
ITW
$79.7B
| $9.28M | 0.03% |
593
+68
| +13% | +$10.3K |
|
446
PUT
Credit Acceptance
CACC
$6.2B
| $9.23M | 0.03% |
200
+85
| +74% | +$40.2K |
|
447
PUT
Atlassian
TEAM
$20.3B
| $9.22M | 0.03% |
735
+70
| +11% | +$9.53K |
|
448
Adobe
ADBE
$84.3B
| $9.15M | 0.03% |
+33,117
| New | +$9.67M |
|
449
CALL
Prudential Financial
PRU
$40.9B
| $9.04M | 0.03% |
1,005
+140
| +16% | +$12.7K |
|
450
PUT
Kroger
KR
$34.2B
| $9M | 0.03% |
3,492
-185
| -5% | -$4.3K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.