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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
276
PUT
TransDigm Group
TDG
$67.9B
| $16.2M | 0.05% |
312
+73
| +31% | +$37.4K |
|
277
PUT
Valero Energy
VLO
$90.6B
| $16.2M | 0.05% |
1,899
+508
| +37% | +$41.1K |
|
278
PUT
Bank of America
BAC
$430B
| $16.1M | 0.05% |
5,531
-1,298
| -19% | -$37.3K |
|
279
PUT
Delta Air Lines
DAL
$53.9B
| $16.1M | 0.05% |
2,800
-627
| -18% | -$37.1K |
|
280
PUT
NextEra Energy
NEE
$187B
| $16.1M | 0.05% |
2,760
+1,720
| +165% | +$93.1K |
|
|
281
Biogen
BIIB
$29.6B
| $15.8M | 0.05% |
+68,075
| New | +$15.9M |
|
282
CALL
Nucor
NUE
$54.9B
| $15.8M | 0.05% |
3,111
+2,291
| +279% | +$120K |
|
283
PUT
KLA
KLAC
$286B
| $15.8M | 0.04% |
9,910
+6,910
| +230% | +$96.6K |
|
284
PUT
Expedia Group
EXPE
$30.9B
| $15.8M | 0.04% |
1,175
-70
| -6% | -$9.25K |
|
285
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $15.8M | 0.04% |
1,521
+615
| +68% | +$65K |
|
286
PUT
Newmont
NEM
$101B
| $15.7M | 0.04% |
4,148
+232
| +6% | +$9.01K |
|
287
PUT
Regeneron Pharmaceuticals
REGN
$68.3B
| $15.7M | 0.04% |
567
-346
| -38% | -$102K |
|
288
CALL
Eli Lilly
LLY
$1.06T
| $15.7M | 0.04% |
1,404
-225
| -14% | -$25.1K |
|
|
CELG
289
CALL
DELISTED
Celgene Corp
CELG
| $15.7M | 0.04% |
1,581
+52
| +3% | +$4.94K |
|
|
CELG
290
PUT
DELISTED
Celgene Corp
CELG
| $15.7M | 0.04% |
1,577
-35
| -2% | -$3.33K |
|
|
B
291
PUT
Barrick Mining
B
$62.3B
| $15.6M | 0.04% |
9,012
+5,397
| +149% | +$95.2K |
|
292
PUT
Essex Property Trust
ESS
$18.8B
| $15.6M | 0.04% |
477
+236
| +98% | +$73.8K |
|
293
CALL
Linde
LIN
$234B
| $15.5M | 0.04% |
799
+58
| +8% | +$11.2K |
|
|
MDCO
294
PUT
DELISTED
Medicines Co
MDCO
| $15.4M | 0.04% |
3,090
+710
| +30% | +$28.3K |
|
295
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.39B
| $15.4M | 0.04% |
27,740
-6,430
| -19% | -$107K |
|
|
COUP
296
PUT
DELISTED
Coupa Software Incorporated
COUP
| $15.3M | 0.04% |
1,181
+441
| +60% | +$61.1K |
|
297
CALL
Snap
SNAP
$7.42B
| $15.2M | 0.04% |
9,596
-446
| -4% | -$7.14K |
|
298
PUT
NetEase
NTES
$76.9B
| $15.1M | 0.04% |
2,840
+1,685
| +146% | +$85.7K |
|
299
CALL
Comcast
CMCSA
$78.3B
| $15.1M | 0.04% |
3,342
-1,213
| -27% | -$53.7K |
|
300
PUT
CSX Corp
CSX
$98.1B
| $14.9M | 0.04% |
6,447
+1,578
| +32% | +$36.7K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.