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 | |
|---|---|---|---|---|---|---|
651
PUT
UnitedHealth
UNH
$392B
| $304K | 0.02% |
1,143
-1,358
| -54% | -$161K |
|
|
MON
652
CALL
DELISTED
Monsanto Co
MON
| $304K | 0.02% |
2,160
+710
| +49% | +$64.1K |
|
|
DYN
653
CALL
DELISTED
Dynegy, Inc.
DYN
| $304K | 0.02% |
+975
| New | +$11.1K |
|
654
Radware
RDWR
$1.24B
| $303K | 0.02% |
25,646
+11,137
| +77% | +$134K |
|
655
Veracyte
VCYT
$4.63B
| $302K | 0.02% |
+55,986
| New | +$331K |
|
656
Avanos Medical
AVNS
$1.17B
| $301K | 0.02% |
+10,500
| New | +$280K |
|
657
CALL
General Motors
GM
$74.3B
| $300K | 0.02% |
2,453
+1,070
| +77% | +$32.2K |
|
658
iShares Core S&P 500 ETF
IVV
$886B
| $300K | 0.02% |
+1,452
| New | +$285K |
|
659
Navient
NAVI
$809M
| $300K | 0.02% |
25,091
+14,109
| +128% | +$147K |
|
|
RDS.A
660
CALL
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $300K | 0.02% |
1,438
+261
| +22% | +$11.7K |
|
661
PUT
Macy's
M
$6.4B
| $299K | 0.02% |
1,522
-21
| -1% | -$868 |
|
662
CALL
Merck
MRK
$315B
| $299K | 0.02% |
2,920
+1,793
| +159% | +$87.8K |
|
|
INVN
663
DELISTED
Invensense Inc
INVN
| $299K | 0.02% |
+35,685
| New | +$283K |
|
664
Novavax
NVAX
$1.3B
| $298K | 0.02% |
+2,889
| New | +$310K |
|
665
Tronox
TROX
$1.06B
| $296K | 0.02% |
46,403
-3,596
| -7% | -$16K |
|
|
CVT
666
DELISTED
CVENT, INC.
CVT
| $296K | 0.02% |
+13,859
| New | +$327K |
|
|
RLYP
667
PUT
DELISTED
RELYPSA INC COM
RLYP
| $296K | 0.02% |
433
-146
| -25% | -$2.48K |
|
668
AerCap
AER
$23.7B
| $294K | 0.02% |
7,590
-5,603
| -42% | -$193K |
|
669
CF Industries
CF
$19.6B
| $294K | 0.02% |
9,407
+8,523
| +964% | +$278K |
|
|
EMC
670
CALL
DELISTED
EMC CORPORATION
EMC
| $294K | 0.02% |
2,774
+1,528
| +123% | +$38.7K |
|
|
671
PUT
General Motors
GM
$74.3B
| $292K | 0.02% |
2,676
+830
| +45% | +$25K |
|
672
PUT
Trip.com Group
TCOM
$26.8B
| $292K | 0.02% |
1,324
-320
| -19% | -$13.4K |
|
|
PPLI
673
People Inc
PPLI
$3.23B
| $291K | 0.02% |
34,680
-1,002
| -3% | -$8.62K |
|
674
CALL
Masco
MAS
$15.7B
| $291K | 0.02% |
648
+402
| +163% | +$11.1K |
|
|
SLAI
675
DELISTED
SOLAI Ltd ADS
SLAI
| $290K | 0.02% |
248
+176
| +244% | +$215K |
|
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.