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 |
iShares Russell 2000 ETF
IWM
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
GGP
676
DELISTED
GGP Inc.
GGP
| $309K | 0.02% |
+11,900
| New | +$313K |
|
|
PPLI
677
People Inc
PPLI
$3.23B
| $307K | 0.02% |
+26,371
| New | +$350K |
|
678
PUT
Jazz Pharmaceuticals
JAZZ
$15.7B
| $307K | 0.02% |
106
+64
| +152% | +$11K |
|
679
Reinsurance Group of America
RGA
$15.4B
| $307K | 0.02% |
+3,398
| New | +$320K |
|
|
ALXN
680
CALL
DELISTED
Alexion Pharmaceuticals
ALXN
| $307K | 0.02% |
494
+172
| +53% | +$31.4K |
|
681
Apollo Global Management
APO
$68.6B
| $306K | 0.02% |
17,816
+13,068
| +275% | +$260K |
|
|
KING
682
DELISTED
KING DIGITAL ENTMT PLC ORD SHS (IRL)
KING
| $306K | 0.02% |
+22,612
| New | +$325K |
|
|
STNR
683
DELISTED
STEINER LEISURE LTD
STNR
| $306K | 0.02% |
+4,847
| New | +$288K |
|
684
iShares US Financials ETF
IYF
$4.36B
| $305K | 0.02% |
7,262
+5,968
| +461% | +$266K |
|
685
Rockwell Automation
ROK
$51B
| $304K | 0.02% |
+3,001
| New | +$340K |
|
686
PUT
Ulta Beauty
ULTA
$20.8B
| $303K | 0.02% |
137
+80
| +140% | +$13.2K |
|
|
NAV
687
PUT
DELISTED
Navistar International
NAV
| $303K | 0.02% |
324
+143
| +79% | +$2.51K |
|
688
PUT
AT&T
T
$160B
| $302K | 0.02% |
1,945
+1,304
| +203% | +$33.3K |
|
689
CALL
UnitedHealth
UNH
$392B
| $302K | 0.02% |
1,281
+23
| +2% | +$2.75K |
|
690
PUT
Western Digital
WDC
$192B
| $301K | 0.02% |
738
+83
| +13% | +$4.99K |
|
|
CPGX
691
DELISTED
COLUMBIA PIPELINE GROUP IN COM STK (DE)
CPGX
| $301K | 0.02% |
+16,492
| New | +$430K |
|
692
iShares Select Dividend ETF
DVY
$23.8B
| $300K | 0.02% |
+4,128
| New | +$308K |
|
693
ServiceNow
NOW
$98.4B
| $300K | 0.02% |
21,615
+12,725
| +143% | +$190K |
|
694
CALL
Home Depot
HD
$330B
| $299K | 0.02% |
1,048
+600
| +134% | +$69.4K |
|
695
Open Text
OTEX
$5.39B
| $298K | 0.02% |
13,326
+8,790
| +194% | +$190K |
|
696
Wells Fargo
WFC
$262B
| $298K | 0.02% |
+5,810
| New | +$319K |
|
|
WCG
697
DELISTED
Wellcare Health Plans, Inc.
WCG
| $298K | 0.02% |
+3,458
| New | +$303K |
|
|
HIFR
698
DELISTED
InfraREIT, Inc.
HIFR
| $298K | 0.02% |
12,610
+6,573
| +109% | +$193K |
|
699
PRA Group
PRAA
$645M
| $297K | 0.02% |
+5,629
| New | +$327K |
|
700
PUT
Bunge Global
BG
$24B
| $296K | 0.02% |
430
+368
| +594% | +$28.5K |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.