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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3751
CALL
Pebblebrook Hotel Trust
PEB
$2.2B
| $10K | ﹤0.01% |
+47
| New | +$1.3K |
|
3752
POSCO
PKX
$15.5B
| $10K | ﹤0.01% |
198
+22
| +13% | +$1.18K |
|
3753
CALL
Pilgrim's Pride
PPC
$7.09B
| $10K | ﹤0.01% |
85
+46
| +118% | +$898 |
|
3754
CALL
PRA Group
PRAA
$688M
| $10K | ﹤0.01% |
26
-44
| -63% | -$1.5K |
|
3755
RLI Corp
RLI
$5.97B
| $10K | ﹤0.01% |
+324
| New | +$10K |
|
3756
CALL
Roper Technologies
ROP
$38.7B
| $10K | ﹤0.01% |
43
+32
| +291% | +$5.74K |
|
3757
CALL
Sanmina
SANM
$9.24B
| $10K | ﹤0.01% |
12
-73
| -86% | -$2.31K |
|
3758
E.W. Scripps
SSP
$282M
| $10K | ﹤0.01% |
+525
| New | +$8.52K |
|
3759
CALL
Synaptics
SYNA
$4.33B
| $10K | ﹤0.01% |
77
-15
| -16% | -$867 |
|
3760
CALL
Tucows
TCX
$101M
| $10K | ﹤0.01% |
51
-6
| -11% | -$194 |
|
3761
CALL
Tenet Healthcare
THC
$22.6B
| $10K | ﹤0.01% |
274
-1,440
| -84% | -$25.8K |
|
3762
Interface
TILE
$2B
| $10K | ﹤0.01% |
+565
| New | +$9.74K |
|
|
TSE
3763
CALL
DELISTED
Trinseo
TSE
| $10K | ﹤0.01% |
43
-67
| -61% | -$3.76K |
|
3764
CALL
UBS Group
UBS
$171B
| $10K | ﹤0.01% |
475
+423
| +813% | +$6.37K |
|
3765
CALL
UGI
UGI
$7.92B
| $10K | ﹤0.01% |
76
+52
| +217% | +$2.33K |
|
3766
CALL
Unum
UNM
$14B
| $10K | ﹤0.01% |
48
+17
| +55% | +$680 |
|
3767
CALL
Bristow Group
VTOL
$1.34B
| $10K | ﹤0.01% |
+25
| New | +$546 |
|
3768
V2X
VVX
$2.82B
| $10K | ﹤0.01% |
450
-1,370
| -75% | -$27.9K |
|
3769
Vanguard Total International Stock ETF
VXUS
$153B
| $10K | ﹤0.01% |
+219
| New | +$10.1K |
|
|
HA
3770
PUT
DELISTED
Hawaiian Holdings, Inc.
HA
| $10K | ﹤0.01% |
37
+16
| +76% | +$817 |
|
|
CONN
3771
CALL
DELISTED
Conn's Inc.
CONN
| $10K | ﹤0.01% |
95
-83
| -47% | -$916 |
|
|
NM
3772
PUT
DELISTED
Navios Maritime Holdings Inc.
NM
| $10K | ﹤0.01% |
7
-32
| -82% | -$427 |
|
|
QUOT
3773
CALL
DELISTED
Quotient Technology Inc
QUOT
| $10K | ﹤0.01% |
261
+131
| +101% | +$1.52K |
|
|
NYMX
3774
CALL
DELISTED
Nymox Pharmaceutical Corp
NYMX
| $10K | ﹤0.01% |
230
+68
| +42% | +$211 |
|
|
TA
3775
CALL
DELISTED
TravelCenters of America LLC
TA
| $10K | ﹤0.01% |
40
-83
| -67% | -$2.81K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.