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 | |
|---|---|---|---|---|---|---|
376
Harley-Davidson
HOG
$2.91B
| $619K | 0.05% |
11,290
+8,186
| +264% | +$462K |
|
|
PBFX
377
DELISTED
PBF LOGISTICS LP
PBFX
| $618K | 0.05% |
35,893
+35,130
| +4,604% | +$736K |
|
|
OMG
378
DELISTED
OM GROUP INC.
OMG
| $611K | 0.04% |
18,590
+18,224
| +4,979% | +$614K |
|
379
CALL
FedEx
FDX
$76.6B
| $610K | 0.04% |
2,232
+1,911
| +595% | +$305K |
|
|
ANDV
380
CALL
DELISTED
Andeavor
ANDV
| $609K | 0.04% |
1,132
+729
| +181% | +$70.8K |
|
381
CALL
Broadcom
AVGO
$1.89T
| $608K | 0.04% |
12,340
+10,440
| +549% | +$132K |
|
382
PUT
General Motors
GM
$74.1B
| $602K | 0.04% |
1,846
+1,086
| +143% | +$33.3K |
|
|
ANDV
383
PUT
DELISTED
Andeavor
ANDV
| $602K | 0.04% |
1,548
+1,280
| +478% | +$124K |
|
384
CALL
JetBlue
JBLU
$1.92B
| $601K | 0.04% |
910
+776
| +579% | +$18.3K |
|
|
MON
385
PUT
DELISTED
Monsanto Co
MON
| $601K | 0.04% |
1,313
+1,054
| +407% | +$104K |
|
|
NUVA
386
DELISTED
NuVasive, Inc.
NUVA
| $600K | 0.04% |
12,443
+11,612
| +1,397% | +$600K |
|
387
PUT
Intuitive Surgical
ISRG
$121B
| $599K | 0.04% |
1,980
+198
| +11% | +$11.2K |
|
|
SKX
388
DELISTED
Skechers
SKX
| $599K | 0.04% |
+13,419
| New | +$609K |
|
|
CHK
389
PUT
DELISTED
Chesapeake Energy Corporation
CHK
| $598K | 0.04% |
15
+9
| +150% | +$15.3K |
|
390
CALL
CVS Health
CVS
$138B
| $593K | 0.04% |
2,454
+1,559
| +174% | +$164K |
|
|
HES
391
PUT
DELISTED
Hess
HES
| $593K | 0.04% |
738
+567
| +332% | +$32.5K |
|
392
CALL
Herbalife
HLF
$1.26B
| $593K | 0.04% |
2,506
+262
| +12% | +$7.18K |
|
393
PUT
ATI
ATI
$26.7B
| $587K | 0.04% |
245
+25
| +11% | +$518 |
|
394
PUT
Valero Energy
VLO
$92.3B
| $584K | 0.04% |
2,745
+2,468
| +891% | +$157K |
|
395
CALL
AutoZone
AZO
$48.5B
| $583K | 0.04% |
234
+175
| +297% | +$124K |
|
|
BLUE
396
DELISTED
bluebird bio
BLUE
| $580K | 0.04% |
524
-170
| -24% | -$310K |
|
397
CALL
Palo Alto Networks
PANW
$273B
| $575K | 0.04% |
5,880
+2,922
| +99% | +$86.2K |
|
|
MDVN
398
PUT
DELISTED
MEDIVATION, INC.
MDVN
| $575K | 0.04% |
479
+355
| +286% | +$17.6K |
|
|
SINA
399
DELISTED
Sina Corp
SINA
| $573K | 0.04% |
14,301
+11,408
| +394% | +$460K |
|
400
Truist Financial
TFC
$63.2B
| $569K | 0.04% |
16,000
+11,654
| +268% | +$450K |
|
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.