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 |
Broadcom
AVGO
|
+$33.7M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.8M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.3M |
| 4 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$11.9M |
| 5 |
Citigroup
C
|
+$8.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$34.2M |
| 2 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$17.9M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$14.7M |
| 4 |
Walt Disney
DIS
|
+$13.3M |
| 5 |
Booking.com
BKNG
|
+$12.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 7.64% |
| 2 | Communication Services | 6.85% |
| 3 | Consumer Discretionary | 4.92% |
| 4 | Healthcare | 4.57% |
| 5 | Financials | 4.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3576
PUT
Matador Resources
MTDR
$5.73B
| $9K | ﹤0.01% |
176
+85
| +93% | +$1.41K |
|
3577
Nokia
NOK
$49.9B
| $9K | ﹤0.01% |
1,618
-100,295
| -98% | -$642K |
|
3578
CALL
Novavax
NVAX
$1.21B
| $9K | ﹤0.01% |
16
-34
| -68% | -$3.65K |
|
3579
PUT
Ocular Therapeutix
OCUL
$1.85B
| $9K | ﹤0.01% |
43
+9
| +26% | +$68 |
|
3580
CALL
O-I Glass
OI
$1.39B
| $9K | ﹤0.01% |
+68
| New | +$975 |
|
3581
PUT
Oceaneering
OII
$4.78B
| $9K | ﹤0.01% |
39
+35
| +875% | +$1.09K |
|
3582
CALL
Option Care Health
OPCH
$3.53B
| $9K | ﹤0.01% |
10
-3
| -23% | -$22 |
|
3583
Old Republic International
ORI
$10.8B
| $9K | ﹤0.01% |
506
-1,334
| -73% | -$24K |
|
3584
CALL
Pacira BioSciences
PCRX
$1.05B
| $9K | ﹤0.01% |
27
-201
| -88% | -$11.8K |
|
|
PMT
3585
PUT
PennyMac Mortgage Investment
PMT
$854M
| $9K | ﹤0.01% |
15
+7
| +88% | +$93 |
|
3586
CALL
Research Frontiers
REFR
$15.2M
| $9K | ﹤0.01% |
+47
| New | +$211 |
|
3587
PUT
Repligen
RGEN
$8.2B
| $9K | ﹤0.01% |
54
+30
| +125% | +$734 |
|
3588
CALL
Ralph Lauren
RL
$22.5B
| $9K | ﹤0.01% |
134
-71
| -35% | -$6.96K |
|
3589
CALL
RingCentral
RNG
$4.77B
| $9K | ﹤0.01% |
46
-105
| -70% | -$1.97K |
|
3590
PUT
Roper Technologies
ROP
$38.7B
| $9K | ﹤0.01% |
108
+66
| +157% | +$11.4K |
|
3591
CALL
Ryanair
RYAAY
$31.1B
| $9K | ﹤0.01% |
113
+45
| +66% | +$1.48K |
|
3592
CALL
Rayonier Advanced Materials
RYAM
$591M
| $9K | ﹤0.01% |
64
+10
| +19% | +$79 |
|
3593
Sonic Automotive
SAH
$3.31B
| $9K | ﹤0.01% |
513
+441
| +613% | +$8.08K |
|
3594
Teucrium Soybean Fund
SOYB
$62.3M
| $9K | ﹤0.01% |
532
-245
| -32% | -$4.29K |
|
|
SPR
3595
PUT
DELISTED
Spirit AeroSystems
SPR
| $9K | ﹤0.01% |
36
+33
| +1,100% | +$1.5K |
|
3596
Tucows
TCX
$101M
| $9K | ﹤0.01% |
435
-3,064
| -88% | -$64.2K |
|
3597
PUT
Teladoc Health
TDOC
$1.69B
| $9K | ﹤0.01% |
+19
| New | +$270 |
|
3598
Teekay
TK
$981M
| $9K | ﹤0.01% |
1,131
-32,221
| -97% | -$243K |
|
3599
CALL
Trex
TREX
$4.57B
| $9K | ﹤0.01% |
48
+4
| +9% | +$39 |
|
3600
CALL
Trane Technologies
TT
$104B
| $9K | ﹤0.01% |
26
+7
| +37% | +$382 |
|
Similar funds
Simplex Trading's Q1 2016 Portfolio in Review
As of Q1 2016, Simplex Trading held 7,084 positions worth $1.25B, down 1.8% from $1.28B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading's Q1 2016 filing shows 1,678 new, 2,214 increased, 1,528 reduced and 1,505 closed positions. Its largest new stake was Broadcom: 2,493,400 shares worth $38.5M. The largest sale was Apple, an estimated $34.2M.
By sector, the portfolio is most concentrated in Technology at 7.6% of assets, up from 7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q1 2016 buy was Broadcom: 2,493,400 shares worth $38.5M.
- Simplex Trading added most to Citigroup in Q1 2016, an estimated $8.7M increase.
- Simplex Trading's biggest Q1 2016 reduction was Booking.com, cutting an estimated $12.1M.
- Simplex Trading fully exited Apple in Q1 2016, selling an estimated $34.2M.
- Simplex Trading's ten largest holdings make up 17% of its $1.25B portfolio in Q1 2016.
- Simplex Trading opened 1,678 new positions and closed 1,505 in Q1 2016.
- Simplex Trading's portfolio value fell 1.8% quarter-over-quarter to $1.25B.
Based on Simplex Trading's 13F filing for Q1 2016, filed 14 Apr 2016.