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 | |
|---|---|---|---|---|---|---|
1301
CALL
McKesson
MCK
$98.6B
| $117K | 0.01% |
425
+222
| +109% | +$47.1K |
|
1302
PUT
Wolfspeed
WOLF
$1.24B
| $117K | 0.01% |
202
+149
| +281% | +$3.81K |
|
|
RAD
1303
PUT
DELISTED
Rite Aid Corporation
RAD
| $117K | 0.01% |
36
+26
| +260% | +$4.33K |
|
|
KYTH
1304
CALL
DELISTED
KYTHERA BIOPHARMACEUTICALS, INC COM
KYTH
| $117K | 0.01% |
254
-319
| -56% | -$23.8K |
|
1305
Copart
CPRT
$25.9B
| $116K | 0.01% |
28,224
+23,992
| +567% | +$106K |
|
1306
PUT
Lexicon Pharmaceuticals
LXRX
$1.03B
| $116K | 0.01% |
+364
| New | +$3.98K |
|
|
ROI
1307
PUT
DELISTED
WISDOMTREE LARGECAP GROWTH FUND
ROI
| $116K | 0.01% |
585
+228
| +64% | +$45.2K |
|
|
YDKG
1308
Yueda Digital Holding
YDKG
$5.03M
| $115K | 0.01% |
+11
| New | +$104K |
|
1309
CALL
Bath & Body Works
BBWI
$4.05B
| $115K | 0.01% |
315
+267
| +556% | +$18.4K |
|
1310
CALL
Best Buy
BBY
$18.1B
| $115K | 0.01% |
528
+25
| +5% | +$857 |
|
1311
Edgewell Personal Care
EPC
$1.28B
| $115K | 0.01% |
1,410
-3,439
| -71% | -$311K |
|
1312
PUT
Equinix
EQIX
$108B
| $115K | 0.01% |
95
+72
| +313% | +$19.7K |
|
1313
Greif
GEF
$4.44B
| $115K | 0.01% |
3,633
+3,538
| +3,724% | +$115K |
|
1314
Toll Brothers
TOL
$14.2B
| $115K | 0.01% |
+3,359
| New | +$127K |
|
1315
UFP Industries
UFPI
$4.98B
| $115K | 0.01% |
+6,000
| New | +$119K |
|
1316
CALL
Wynn Resorts
WYNN
$10.1B
| $115K | 0.01% |
1,637
+482
| +42% | +$41.9K |
|
|
AIFU
1317
AIFU Inc
AIFU
$201M
| $115K | 0.01% |
38
+21
| +124% | +$65.9K |
|
|
SPWR
1318
PUT
DELISTED
SunPower Corporation Common Stock
SPWR
| $115K | 0.01% |
156
-52
| -25% | -$838 |
|
|
SHPG
1319
CALL
DELISTED
Shire pic
SHPG
| $115K | 0.01% |
209
+160
| +327% | +$38.1K |
|
|
AFAM
1320
DELISTED
Almost Family Inc
AFAM
| $115K | 0.01% |
2,878
-153
| -5% | -$6.83K |
|
1321
CALL
Ambarella
AMBA
$2.96B
| $114K | 0.01% |
654
-576
| -47% | -$54.4K |
|
1322
A10 Networks
ATEN
$2.51B
| $114K | 0.01% |
+19,071
| New | +$120K |
|
1323
Broadridge
BR
$17.1B
| $114K | 0.01% |
+2,062
| New | +$111K |
|
1324
PUT
Intuit
INTU
$80.2B
| $114K | 0.01% |
57
+30
| +111% | +$2.91K |
|
1325
LXP Industrial Trust
LXP
$3.53B
| $114K | 0.01% |
2,819
+822
| +41% | +$34.7K |
|
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.