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 | |
|---|---|---|---|---|---|---|
|
GTT
1551
DELISTED
GTT Communications, Inc.
GTT
| $84K | 0.01% |
+3,638
| New | +$85K |
|
1552
PUT
Acuity Brands
AYI
$9.88B
| $83K | 0.01% |
56
+19
| +51% | +$3.69K |
|
|
BPT
1553
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $83K | 0.01% |
2,029
-4,472
| -69% | -$218K |
|
1554
Bassett Furniture
BSET
$169M
| $83K | 0.01% |
+2,989
| New | +$96.1K |
|
1555
Darling Ingredients
DAR
$9.93B
| $83K | 0.01% |
7,434
-8,536
| -53% | -$109K |
|
1556
M/I Homes
MHO
$3.83B
| $83K | 0.01% |
+3,532
| New | +$87.7K |
|
1557
Stryker
SYK
$127B
| $83K | 0.01% |
886
-1,068
| -55% | -$106K |
|
1558
PUT
Truist Financial
TFC
$63.2B
| $83K | 0.01% |
194
+155
| +397% | +$5.98K |
|
1559
PUT
T. Rowe Price
TROW
$25B
| $83K | 0.01% |
47
-62
| -57% | -$4.59K |
|
1560
VirnetX Holding Corp
VHC
$52.3M
| $83K | 0.01% |
+1,176
| New | +$93.7K |
|
|
FGP
1561
PUT
DELISTED
Ferrellgas Partners, L.P.
FGP
| $83K | 0.01% |
293
+114
| +64% | +$2.43K |
|
|
SCMP
1562
DELISTED
Sucampo Pharmaceuticals, Inc.
SCMP
| $83K | 0.01% |
4,195
+286
| +7% | +$6.56K |
|
1563
PUT
AerCap
AER
$23.9B
| $82K | 0.01% |
404
+253
| +168% | +$11.2K |
|
|
BNY
1564
PUT
Bank of New York Mellon
BNY
$108B
| $82K | 0.01% |
389
+293
| +305% | +$12.2K |
|
1565
DigitalBridge
DBRG
$2.94B
| $82K | 0.01% |
1,445
-764
| -35% | -$53.6K |
|
1566
EnerSys
ENS
$6.95B
| $82K | 0.01% |
1,547
+1,500
| +3,191% | +$86.5K |
|
1567
Jefferies Financial Group
JEF
$12.9B
| $82K | 0.01% |
4,527
-758
| -14% | -$15.2K |
|
1568
Microchip Technology
MCHP
$42.8B
| $82K | 0.01% |
3,822
-17,112
| -82% | -$369K |
|
1569
CALL
3M
MMM
$89B
| $82K | 0.01% |
801
+70
| +10% | +$8.61K |
|
1570
PUT
Oil States International
OIS
$522M
| $82K | 0.01% |
363
+232
| +177% | +$6.87K |
|
1571
Visteon
VC
$2.77B
| $82K | 0.01% |
+818
| New | +$82.3K |
|
|
VRNT
1572
DELISTED
Verint Systems
VRNT
| $82K | 0.01% |
+3,763
| New | +$104K |
|
1573
PUT
WisdomTree
WT
$2.97B
| $82K | 0.01% |
236
-204
| -46% | -$4.29K |
|
|
PRFT
1574
DELISTED
Perficient Inc
PRFT
| $82K | 0.01% |
5,321
+4,258
| +401% | +$68.8K |
|
|
VMW
1575
CALL
DELISTED
VMware, Inc
VMW
| $82K | 0.01% |
564
+455
| +417% | +$37.8K |
|
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.