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 | |
|---|---|---|---|---|---|---|
|
SEE
751
DELISTED
Sealed Air
SEE
| $267K | 0.02% |
5,711
-4,463
| -44% | -$231K |
|
|
AVP
752
PUT
DELISTED
Avon Products, Inc.
AVP
| $267K | 0.02% |
801
+605
| +309% | +$3.07K |
|
|
ARRS
753
DELISTED
ARRIS International plc Ordinary Shares
ARRS
| $267K | 0.02% |
10,306
+6,155
| +148% | +$174K |
|
|
INVN
754
DELISTED
Invensense Inc
INVN
| $267K | 0.02% |
28,798
+16,915
| +142% | +$190K |
|
|
XEC
755
DELISTED
CIMAREX ENERGY CO
XEC
| $266K | 0.02% |
2,599
-5,368
| -67% | -$572K |
|
|
CMCSK
756
CALL
DELISTED
COMCAST CORP SPL A (NEW)
CMCSK
| $266K | 0.02% |
1,577
+864
| +121% | +$146K |
|
757
Silicon Laboratories
SLAB
$7.16B
| $265K | 0.02% |
6,392
+2,968
| +87% | +$135K |
|
758
Trip.com Group
TCOM
$26.8B
| $265K | 0.02% |
8,402
-45,290
| -84% | -$1.57M |
|
|
DNKN
759
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $265K | 0.02% |
5,420
-15,318
| -74% | -$794K |
|
760
PUT
American Tower
AMT
$77.4B
| $264K | 0.02% |
169
-195
| -54% | -$18.4K |
|
761
CBRE Group
CBRE
$40.1B
| $264K | 0.02% |
8,261
+5,924
| +253% | +$210K |
|
762
PUT
Terex
TEX
$7.66B
| $264K | 0.02% |
404
+384
| +1,920% | +$8.38K |
|
763
PUT
BHP
BHP
$215B
| $263K | 0.02% |
419
+262
| +167% | +$8.51K |
|
764
CALL
Microsoft
MSFT
$2.9T
| $263K | 0.02% |
2,121
+1,087
| +105% | +$48.8K |
|
765
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $263K | 0.02% |
273
+99
| +57% | +$12.7K |
|
766
NETSCOUT
NTCT
$2.91B
| $262K | 0.02% |
+7,419
| New | +$281K |
|
|
ESRX
767
CALL
DELISTED
Express Scripts Holding Company
ESRX
| $262K | 0.02% |
1,350
+585
| +76% | +$51K |
|
|
POM
768
DELISTED
PEPCO HOLDINGS, INC.
POM
| $262K | 0.02% |
10,842
+4,194
| +63% | +$107K |
|
769
Crown Castle
CCI
$33.8B
| $261K | 0.02% |
+3,321
| New | +$270K |
|
|
DCP
770
PUT
DELISTED
DCP Midstream, LP
DCP
| $260K | 0.02% |
354
+262
| +285% | +$7.58K |
|
|
ATCO
771
DELISTED
Atlas Corp.
ATCO
| $260K | 0.02% |
16,996
-3,526
| -17% | -$61.7K |
|
772
CALL
Coca-Cola
KO
$354B
| $258K | 0.02% |
2,217
+1,414
| +176% | +$56.6K |
|
773
PUT
Melco Resorts & Entertainment
MLCO
$2.12B
| $258K | 0.02% |
175
+32
| +22% | +$616 |
|
774
CALL
Philip Morris
PM
$303B
| $258K | 0.02% |
1,354
+88
| +7% | +$7.24K |
|
775
PUT
Element Solutions
ESI
$9.35B
| $257K | 0.02% |
+711
| New | +$14.6K |
|
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.