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 | |
|---|---|---|---|---|---|---|
1751
PUT
Royal Caribbean
RCL
$78.7B
| $68K | 0.01% |
536
+409
| +322% | +$35.9K |
|
|
ETFC
1752
DELISTED
E*Trade Financial Corporation
ETFC
| $68K | 0.01% |
2,584
-7,094
| -73% | -$197K |
|
|
ADPT
1753
PUT
DELISTED
Adeptus Health Inc
ADPT
| $68K | 0.01% |
+44
| New | +$4.54K |
|
|
HILL
1754
DELISTED
DOT HILL SYSTEMS CORP
HILL
| $68K | 0.01% |
7,088
+4,084
| +136% | +$31.5K |
|
|
CKEC
1755
DELISTED
Carmike Cinemas Inc
CKEC
| $68K | 0.01% |
+3,406
| New | +$82K |
|
1756
Carlyle Group
CG
$16.3B
| $67K | ﹤0.01% |
4,022
+1,843
| +85% | +$43.3K |
|
1757
PUT
Hasbro
HAS
$12.6B
| $67K | ﹤0.01% |
172
+116
| +207% | +$8.95K |
|
1758
PUT
Incyte
INCY
$23.5B
| $67K | ﹤0.01% |
136
+93
| +216% | +$10.4K |
|
1759
PUT
KB Home
KBH
$3.48B
| $67K | ﹤0.01% |
317
+231
| +269% | +$3.53K |
|
1760
CALL
Omeros
OMER
$709M
| $67K | ﹤0.01% |
499
+191
| +62% | +$2.97K |
|
|
ENDP
1761
CALL
DELISTED
Endo International plc
ENDP
| $67K | ﹤0.01% |
334
+226
| +209% | +$18.1K |
|
|
HIVE
1762
DELISTED
Aerohive Networks
HIVE
| $67K | ﹤0.01% |
11,299
+9,284
| +461% | +$63.8K |
|
|
CVRR
1763
DELISTED
CVR Refining, LP
CVRR
| $67K | ﹤0.01% |
3,520
-5,900
| -63% | -$114K |
|
1764
Acadia Pharmaceuticals
ACAD
$4.25B
| $66K | ﹤0.01% |
2,026
+1,004
| +98% | +$41.8K |
|
1765
PUT
Arista Networks
ANET
$219B
| $66K | ﹤0.01% |
544
-208
| -28% | -$991 |
|
1766
PUT
Arrowhead Research
ARWR
$12.1B
| $66K | ﹤0.01% |
315
+147
| +88% | +$924 |
|
|
FL
1767
CALL
DELISTED
Foot Locker
FL
| $66K | ﹤0.01% |
79
-272
| -77% | -$19.4K |
|
1768
PUT
Invesco CurrencyShares Australian Dollar Trust
FXA
$96.8M
| $66K | ﹤0.01% |
69
+26
| +60% | +$1.89K |
|
1769
iShares US Regional Banks ETF
IAT
$685M
| $66K | ﹤0.01% |
1,982
+1,189
| +150% | +$42.3K |
|
|
IRBT
1770
DELISTED
iRobot
IRBT
| $66K | ﹤0.01% |
2,294
+846
| +58% | +$25.7K |
|
1771
Newmont
NEM
$98.2B
| $66K | ﹤0.01% |
4,149
-2,635
| -39% | -$47.2K |
|
1772
PUT
Annaly Capital Management
NLY
$16.9B
| $66K | ﹤0.01% |
117
+77
| +193% | +$3.08K |
|
1773
SPX Corp
SPXC
$11B
| $66K | ﹤0.01% |
+5,549
| New | +$85.2K |
|
1774
Sasol
SSL
$7.58B
| $66K | ﹤0.01% |
2,399
+964
| +67% | +$30.9K |
|
1775
PUT
Universal Health Services
UHS
$9.43B
| $66K | ﹤0.01% |
78
-119
| -60% | -$16.6K |
|
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.