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 | |
|---|---|---|---|---|---|---|
376
PUT
Snap
SNAP
$7.42B
| $11.5M | 0.03% |
7,295
+4,263
| +141% | +$68.3K |
|
|
CTXS
377
CALL
DELISTED
Citrix Systems Inc
CTXS
| $11.5M | 0.03% |
1,190
+329
| +38% | +$31.5K |
|
378
CALL
Vanguard S&P 500 ETF
VOO
$967B
| $11.4M | 0.03% |
944
-454
| -32% | -$123K |
|
379
PUT
Centene
CNC
$31.5B
| $11.4M | 0.03% |
2,636
+300
| +13% | +$14.6K |
|
380
PUT
Seagate
STX
$207B
| $11.4M | 0.03% |
2,120
+709
| +50% | +$34.8K |
|
381
PUT
Kraft Heinz
KHC
$30.1B
| $11.4M | 0.03% |
4,079
+1,275
| +45% | +$36.7K |
|
|
MDCO
382
CALL
DELISTED
Medicines Co
MDCO
| $11.3M | 0.03% |
2,270
+1,212
| +115% | +$48.3K |
|
383
CALL
Cummins
CMI
$91.8B
| $11.3M | 0.03% |
695
+504
| +264% | +$80.6K |
|
384
CALL
Emerson Electric
EMR
$81.2B
| $11.3M | 0.03% |
1,684
+378
| +29% | +$23.8K |
|
385
PUT
Spotify
SPOT
$96.4B
| $11.2M | 0.03% |
984
-175
| -15% | -$24.7K |
|
386
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $11.2M | 0.03% |
1,081
+472
| +78% | +$49.9K |
|
387
PUT
Ventas
VTR
$47.6B
| $11.2M | 0.03% |
1,529
-6
| -0.4% | -$426 |
|
388
PUT
Trade Desk
TTD
$7.89B
| $11.1M | 0.03% |
5,920
-1,150
| -16% | -$27.4K |
|
389
PUT
Royal Caribbean
RCL
$76B
| $11.1M | 0.03% |
1,023
+26
| +3% | +$2.86K |
|
390
CALL
Dell
DELL
$284B
| $11M | 0.03% |
4,202
+2,154
| +105% | +$57.1K |
|
391
CALL
iShares MSCI Global Gold Miners ETF
RING
$2.31B
| $11M | 0.03% |
2,385
+1,085
| +83% | +$24.3K |
|
392
PUT
Vanguard FTSE Europe ETF
VGK
$29.8B
| $11M | 0.03% |
2,226
+330
| +17% | +$17.7K |
|
393
CALL
SS&C Technologies
SSNC
$16.1B
| $10.9M | 0.03% |
2,116
+1,965
| +1,301% | +$100K |
|
394
PUT
Skyworks Solutions
SWKS
$9.1B
| $10.9M | 0.03% |
1,375
-277
| -17% | -$22.1K |
|
395
Booking.com
BKNG
$134B
| $10.9M | 0.03% |
138,625
+130,775
| +1,666% | +$10.1M |
|
|
HES
396
PUT
DELISTED
Hess
HES
| $10.8M | 0.03% |
1,784
-513
| -22% | -$32K |
|
397
CALL
Intuit
INTU
$77B
| $10.7M | 0.03% |
404
+142
| +54% | +$39.1K |
|
398
CALL
AB InBev
BUD
$155B
| $10.7M | 0.03% |
1,122
-136
| -11% | -$12.9K |
|
399
PUT
Southern Company
SO
$109B
| $10.7M | 0.03% |
1,728
+873
| +102% | +$50.6K |
|
|
EXAS
400
PUT
DELISTED
Exact Sciences
EXAS
| $10.6M | 0.03% |
1,178
+86
| +8% | +$9.8K |
|
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.